Process for the purification of wastewater obtained from thermal decomposition of a solid organic material

Abstract

A wastewater purification process, comprising (a) providing at least one wastewater stream WIM(i) comprising organic material and exhibiting a TOC content cIM(i), wherein the at least one wastewater stream WIM(i) is obtainable or obtained by working up at least one stream resulting from a thermal decomposition P of a solid organic material MS; (b) subjecting at least one of the wastewater streams WIM(i) to electro-oxidation OE in at least one electrolysis cell comprising a boron-doped diamond (BDD) anode and a cathode, obtaining from the at least one wastewater stream WIM(i) at least one purified wastewater stream WPU(j) exhibiting a TOC content cPU(j) with cPU(j) < cIM(i).

Description

240460W0011Process for the purification of wastewater obtained from thermal decomposition of a solid organic materialThe present invention relates to a process for the treatment of wastewater containing organic compounds from the pyrolysis of organic solid material to reduce the amount of the organic compounds contained in the wastewater.Currently, plastic waste is still largely landfilled or incinerated for heat generation. Chemical recycling is an attractive way to convert waste plastic material into useful chemicals. An important technique for chemically recycling plastic waste is pyrolysis. The pyrolysis is a thermal degradation of plastic waste in an inert atmosphere and yields value added products such as pyrolysis gas, liquid pyrolysis oil and char (residue), wherein pyrolysis oil is the major product. The pyrolysis gas and char can be used as fuel for generating heat, e.g. for reactor heating purposes. The pyrolysis oil can be used as source for syngas production and / or processed into chemical feedstock such as ethylene, propylene, C4 cuts, etc. for example in a (steam) cracker.Typically, the plastic waste is mixed plastic waste composed of different types of polymers. The polymers are often composed of carbon and hydrogen in combination with other elements such as chlorine, bromine, fluorine, sulfur, oxygen and nitrogen that complicate recycling efforts. Especially, a high quality pyrolysis oil rich in carbon and hydrogen and low in elements other than carbon and hydrogen is preferred as feedstock in a (steam) cracker to prevent catalyst deactivation and corrosion problems in downstream refinery processes.WO 2021 / 224287 A1 discloses a process for purifying a crude pyrolysis oil originating from the pyrolysis of plastic waste. WO 2023 / 073059 A1 discloses a process for purifying a pyrolysis oil, comprising subjecting a stream comprising a pyrolysis oil to hydrogenation and dehalogenation. US 11,248,177 B2 describes the purification of hydrocarbons in pyrolysis oil via electro regenerated persulfate solution. J.Chem.Technol.Biotechnol. 2009, 84, 1747-1755 describes the electro-oxidation of organic matter, nitrogen species and microorganisms in the presence of water, involving the oxidation of pollutants to CO2 and the hydrogen formation as byproduct. US 2018 / 0099881 A1 describes an apparatus for electrochemical treatment of wastewater. US 2020 / 0010341 A1 describes a stack of electrochemical cells for wastewater treatment with isolated electrodes. WO 2019 / 014467 A1 describes a method of operating a wastewater treatment system. WO 2020 / 53063 A1 describes an apparatus and method for purifying wastewater.Christopher Kick et al., "Aqueous phase of thermo-catalytic reforming of sewage sludge - quantity, quality, and its electrooxidative treatment by a boron-doped diamond electrode”, Separation and Purification Technology, Elsevier Science, Amsterdam, NL, vol. 286, January 1, 2022, relates to a study wherein the chemical composition and the amount of the resulting aqueous phase from the thermo-catalytic reforming process of sewage sludge at different process parameters are compared to those of non-catalytic fast pyrolysis processes from literature. Furthermore, electrooxidation using a boron-doped diamond electrode was investigated as purification technology for the resulting aqueous phase.240460W0012US 2019 / 177186 A1 discloses a process for electrochemical purification of chloride-containing aqueous process solutions contaminated with organic chemical compounds using a boron-doped diamond electrode, wherein the purification using a boron-doped diamond electrode is carried out a potential of more than 1.4 V measured against the reversible hydrogen electrode and a pH of the process solution of at least pH 10, in the anode zone of an electrolysis cell to a prescribed total content of organic chemical compounds.CN 113717 784 A relates to a recovery treatment method of waste oil sludge, and particularly relates to a treatment method of water-insoluble (oil-based) waste oil sludge.The object underlying the present invention is to provide a process for the treatment of wastewater containing organic compounds from the thermal decomposition of organic solid material such as the pyrolysis of organic solid material in order to reduce the amount of the organic compounds contained in the wastewater. Preferably, the treated wastewater can be discharged to a standard wastewater treatment plant.According to the present, it was found that if wastewater from a thermal decomposition of a solid material, such as from a pyrolysis of a solid material, is treated using an electro-oxidation method, an advantageous process can be realized which, among others, is highly sustainable since electrons act as reagents at moderate temperatures and pressure; is highly robust since it can be easily started and stopped and the treatment of emulsions or cloudy solutions is possible; is highly versatile since the treatment of many pollutants at high efficiency and the treatment of wastewater from different compositions such as different compositions of pyrolysis oil are possible; is highly flexible since it can be combined with traditional treatments such as standard wastewater treatment plant for further treating of the electrochemically purified wastewater; it results in carbon dioxide and hydrogen as by-product which can be converted to valuable products in downstream processes.Therefore, the present invention relates to a wastewater purification process, comprising(a) providing at least one wastewater stream WIMO) comprising organic material and exhibiting a TOC content CIMO), wherein the at least one wastewater stream WIM(I) is obtainable or obtained by working up at least one stream resulting from a thermal decomposition P of a solid organic material Ms;(b) subjecting at least one of the wastewater streams WIM(I) to electro-oxidation OE in at least one electrolysis cell comprising a boron-doped diamond (BDD) anode and a cathode, obtaining from the at least one wastewater stream WIM(I) at least one purified wastewater stream Wpu(j) exhibiting a TOC content Cpu(j) with cpu(j) < CIMO).Further, the present invention relates to a process for the purification of wastewater, comprising(a) providing at least one wastewater stream WIMO) comprising organic material and exhibiting a TOC content CIMO), wherein providing said at least one wastewater stream comprises a thermal decomposition P of a solid organic material Ms and working up at least one stream resulting from said thermal decomposition P;240460W0013(b) subjecting at least one of the wastewater streams WIM(I) to electro-oxidation OE in at least one electrolysis cell comprising a boron-doped diamond (BDD) anode and a cathode, obtaining from the at least one wastewater stream WIM(I) at least one purified wastewater stream WRUO) exhibiting a TOC content CRUO) with Cpu(j) < CIMO).Preferably, the thermal decomposition P comprises, more preferably is a pyrolysis P. Therefore, the present invention preferably relates to a wastewater purification process, comprising(a) providing at least one wastewater stream WIM(I) comprising organic material and exhibiting a TOC content CIMO), wherein the at least one wastewater stream WIM(I) is obtainable or obtained by working up at least one stream resulting from a pyrolysis P of a solid organic material Ms;(b) subjecting at least one of the wastewater streams WIM(I) to electro-oxidation OE in at least one electrolysis cell comprising a boron-doped diamond (BDD) anode and a cathode, obtaining from the at least one wastewater stream WIM(I) at least one purified wastewater stream Wpu(j) exhibiting a TOC content Cpu(j) with cpu(j) < CIMO).Further, preferably, the present invention relates to a process for the purification of wastewater, comprising(a) providing at least one wastewater stream WIM(I) comprising organic material and exhibiting a TOC content CIMO), wherein providing said at least one wastewater stream comprises a pyrolysis P of a solid organic material Ms and working up at least one stream resulting from said pyrolysis P;(b) subjecting at least one of the wastewater streams WIMO) to electro-oxidation OE in at least one electrolysis cell comprising a boron-doped diamond (BDD) anode and a cathode, obtaining from the at least one wastewater stream WIM(I) at least one purified wastewater stream Wpu(j) exhibiting a TOC content Cpu(j) with cpu(j) < CIM(I).Preferably, the BDD anode according to (b) exhibits a BDD coating supported on a suitable support material. Preferably, said support material comprises, more preferably is one or more of Nb, Ta, Si, graphite, and an electrically conductive ceramic. Yet more preferably, the support material comprises Nb. Optionally, the support material may consist of Nb.Preferably, the BDD coating exhibits a thickness in the range of from 5 to 50 pm, more preferably in the range of from 5 to 40 pm, more preferably in the range of from 5 to 30 pm, more preferably in the range of from 5 to 20 pm, more preferably in the range of from 5 to 15 pm.While there are no specific restrictions regarding the boron doping of the BDD coating, it is preferred that the BDD coating exhibits a boron doping in the range of from 0.01 to 3 weight-%, more preferably in the range of from 0.02 to2.5 weight-%, more preferably in the range of from 0.03 to 2.0 weight-%, more preferably in the range of from 0.05 to1 .5 weight-%, more preferably in the range of from 0.075 to 1 .0 weight-%, more preferably in the range of from 0.1 to 0.5 weight-%, based on the total weight of the BDD coating.Generally according to the present invention, any suitable cathode can be used according to (b).240460W0014It may be preferred, however, that the cathode exhibits a BDD coating supported on a support material. Preferably, said support material comprises, more preferably is one or more of Nb, Ta, Si, graphite, and an electrically conductive ceramic. Yet more preferably, the support material of the cathode comprises Nb. Optionally, the support material of the cathode may consist of Nb. Preferably, the BDD coating of the cathode exhibits a thickness in the range of from 5 to 50 pm, more preferably in the range of from 5 to 40 pm, more preferably in the range of from 5 to 30 pm, more preferably in the range of from 5 to 20 pm, more preferably in the range of from 5 to 15 pm. While there are no specific restrictions regarding the boron doping of the BDD coating of the cathode, it is preferred that the BDD coating exhibits a boron doping in the range of from 0.01 to 3 weight-%, more preferably in the range of from 0.02 to2.5 weight-%, more preferably in the range of from 0.03 to 2.0 weight-%, more preferably in the range of from 0.05 to1 .5 weight-%, more preferably in the range of from 0.075 to 1 .0 weight-%, more preferably in the range of from 0.1 to 0.5 weight-%, based on the total weight of the BDD coating.Alternatively, the cathode according to (b) is a Pt cathode, a Ni cathode or a steel cathode.If according to the present invention, more than one electro-oxidation units UOEG) are used as described herein, the different cathodes maybe used in different units UOEG). According to the present invention, in at least one of the electro-oxidation units UOEG) a boron-doped diamond (BDD) anode is employed, and it is preferred that in every electro-oxidation unit UOEO), a boron-doped diamond (BDD) anode is employed. Depending on the electro-oxidation task to be met in a given electro-oxidation units UOEO), differently designed boron-doped diamond (BDD) anodes may be employed in different electro-oxidation units UOEG) wherein preferably all of these boron-doped diamond (BDD) anodes exhibit the general and preferred features described herein.Preferably, in the electrolysis cell according to (b), the gap between the anode and the cathode is in the range of from 0.5 to 10 mm, more preferably in the range of from 0.75 to 7.5 mm, more preferably in the range of from 1 to 5 mm. If according to the present invention, more than one electro-oxidation unit UOEG) is used as described herein, the gap between the anode and the cathode in at least one of the cells of an electro-oxidation units UOEG) is in the abovedefined general or preferred range, and it is preferred that in every cell of an electro-oxidation unit UOEO), the gap is in the above-defined general or preferred range. Still more preferably, the gap in every cell of every electro-oxidation unit UOEG) is in the above-defined general or preferred range.Preferably, the electro-oxidation according to (b) is carried out at a temperature of the wastewater in the electrolysis cell in the range of from 0 to 85 °C, more preferably in the range of from 10 to 80 °C, more preferably in the range of from 20 to 75 °C. If according to the present invention, more than one electro-oxidation unit UOEG) is used as described herein, the temperature in at least one of the cells of an electro-oxidation units UOEG) is in the abovedefined general or preferred range, and it is preferred that in every cell of an electro-oxidation unit UOEO), the240460W0015 temperature is in the above-defined general or preferred range. Still more preferably, the temperature in every cell of every electro-oxidation unit UOEQ) is in the above-defined general or preferred range.Preferably, the electro-oxidation according to (b) is carried out at a specific energy value in the range of from 0.1 to 5 MWh / m3. Conceivable ranges may be of from 0.3 to 3.5 MWh / m3or from 0.5 to 2 MWh / m3. If according to the present invention, more than one electro-oxidation unit UOEO) is used as described herein, the specific energy in at least one electro-oxidation unit UOEO) is in the above-defined general or conceivable range, and it is preferred that in every electro-oxidation unit UOEO), the specific energy is in the above-defined general or conceivable range.Preferably, the electro-oxidation according to (b) is carried out at a current density in the range of from 5 to 250 mA / cm2, more preferably in the range of from 10 to 150 mA / cm2, more preferably in the range of from 50 to 100 mA / cm2. If according to the present invention, more than one electro-oxidation unit UOEO) is used as described herein, the current density in at least one electro-oxidation unit UOEO) is in the above-defined general or preferred range, and it is preferred that in every electro-oxidation unit UOEO), the current density is in the above-defined general or conceivable range.Generally, the period during which the electro-oxidation is carried out will be suitably chosen so that the TOC content is sufficiently decreased to allow the desired use of the purified wastewater stream WRUO)-Regarding the solid material Ms according to (a), it is especially preferred that it comprises or consists of a waste material, preferably one or more of a plastic waste material and a textile waste material, more preferably a plastic waste material, more preferably a mixed plastic waste material.Preferably, the solid material Ms according to (a) comprises one or more polymers, preferably one or more of a polyamide (PA) including polyamide 6 and PA66; a polyisocyanate polyaddition product, preferably one or more of a polyurethane (PU), a thermoplastic polyurethane (TPU), a polyurea and a polyisocyanurate (PIR); a low-density polyethylene (LDPE); a high-density polyethylene (HDPE); a polyethylene (PE); a polypropylene (PP); a polyvinyl chloride (PVC); a polyvinyl acetate (PVA); a polystyrene (PS); a poly acrylonitrile butadiene styrene (ABS); a polystyreneacrylonitrile (SAN); a polyacrylate styrene acrylonitrile (ASA); a polytetrafluoroethylene (PTFE); a poly(methyl acrylate) (PMA); a poly(methyl methacrylate) (PMMA); a polybutadiene (BR, PBD); a poly(cis-1 ,4- isoprene); a poly(trans-1 ,4-isoprene); a polyoxy-methylene (POM); a polyethylene terephthalate (PET); a polybutylene terephthalate (PBT); a polybutylene adipate co-terephthalate (PBAT); a polyester (PES); a polyether sulfone (PESU); a polyhydroxyalkanoate (PHA); a poly-3-hydroxybutyrate (P3HB); a poly-4-hydroxybutyrate (P4HB); a polyhydroxyvalerate (PHV); a polyhydroxyhexanoate (PHH); a polyhydroxyoctanoate (PHO); a polylactic acid (PLA); a polysulfone (PSU); a polyphenylene sulfone (PPSU); a polycarbonate (PC); a polyether ether ketone (PEEK); a poly(p-phenylene oxide) (PPO); a poly(p-phenylene ether) (PPE); and a copolymer of two or more thereof,240460W0016 more preferably one or more of a polyolefin, a polyester, a polycarbonate, a polyurethane and a polyamide other than polyamide 6.Generally, there no specific restrictions how the at least one wastewater stream WIM(I) according to (a) is provided, with the proviso that the at least one wastewater stream WIM(I) results from suitably working up at least one stream which at least one stream in turn results from a thermal decomposition P, preferably a pyrolysis P of the solid organic material Ms.According to a preferred process of the present invention, providing the at least one wastewater stream WIM(I) according to (a) comprises(a.1) providing the solid material Ms;(a.2) subjecting the solid material Ms provided according to (a.1) to a pyrolysis P, obtaining an intermediate gas stream SGI;(a.3) subjecting SGI obtained according to (a.2) to a condensation C, obtaining a solids-containing liquid stream SSL comprising an aqueous phase PSLA and an organic phase PSLO, and further obtaining an off-gas stream SOFF;(a.4) subjecting the stream SSL obtained according to (a.3) to a solid-liquid separation DSL, obtaining a liquid stream SLI comprising PSLA and PSLO and being depleted in solids compared to MSL, and further obtaining a solids residue Rs;(a.5) subjecting the stream SLI to a phase separation DRSI, obtaining a liquid aqueous stream SLAI comprising PSLA and being depleted PSLO compared to SLI, and further obtaining a liquid organic stream SLOI comprising PSLO and being depleted in PSLA compared to Sn.According to a first possibility provided by the present invention, the preferred process preferably comprises subjecting the off-gas stream SOFF obtained according to (a.3) to an aqueous treatment TAO with a liquid aqueous medium Lo, obtaining a liquid aqueous stream SLOFF.Preferably, the liquid aqueous stream SLOFF obtained from the aqueous treatment TAO exhibits a pH of at least 8, preferably in the range of from 8 to 13, more preferably in the range of from 9 to 12, the pH being determined as described in Reference Example 1. Preferably, the liquid aqueous medium Lo comprises at least one base, preferably at least one inorganic base, wherein more preferably, the base is selected from the group consisting of ammonia, one or more alkali metal compounds, one or more alkaline earth metal compounds, and mixtures of two or more thereof, more preferably from the group consisting of one or more alkali metal compounds, more preferably from the group consisting of potassium hydroxide, sodium hydroxide, potassium carbonate, sodium carbonate, potassium bicarbonate, sodium bicarbonate, and mixtures of two or more thereof, more preferably from the group consisting of potassium hydroxide, sodium hydroxide, potassium carbonate, sodium carbonate, and mixtures of two or more thereof, more preferably from the group consisting of potassium hydroxide, sodium hydroxide and a mixture thereof, wherein more preferably, the liquid aqueous medium Lo comprises sodium hydroxide. It is preferred according to the240460W0017 present invention that the liquid aqueous stream SLOFF is subjected as a wastewater stream WIM(1 ) to electrooxidation according to (b).According to the present invention, it is also possible that prior to being subjected to electro-oxidation according to (b), the liquid aqueous stream SLOFF is subjected to an aqueous treatment TAOO with a liquid aqueous medium Loo, thereby adjusting the pH of SLOFF and obtaining a liquid stream SLOFFP as pH-adjusted stream SLOFF. After said treatment, it is preferred that the liquid aqueous stream SLOFFP to be subjected to electro-oxidation according to (b) exhibits a pH of at most 6.5, more preferably in the range of from 1 to 6.5, more preferably in the range of from 2 to 5, the pH being determined as described in Reference Example 1. Preferably, the liquid aqueous medium Loo comprises at least one acid, more preferably at least one inorganic acid, wherein more preferably, the at least one inorganic acid is selected from the group consisting of sulfuric acid, phosphoric acid, hydrochloric acid, nitric acid, boric acid, hydrobromic acid, perchloric acid, hydroiodic acid, and mixtures of two or more thereof. Further, the liquid aqueous stream SLOFFP would then be subjected as a wastewater stream WIM(1 ) to electro-oxidation according to (b). Further, it may be possible that the liquid aqueous stream SLOFFP comprises an aqueous phase PLOFFPA and an organic phase PLOFFPO. In this case, it may be preferred that the process further comprising subjecting the stream SLOFFP to a phase separation DPSO, obtaining a liquid aqueous stream SLOFFPA comprising PLOFFPA and being depleted in PLOFFPO compared to SLOFFP, and further obtaining a liquid organic stream SLOFFPO comprising PLOFFPO and being depleted in PLOFFPA compared to SLOFFP. It would be preferred that the liquid aqueous stream SLOFFPA is then subjected as a wastewater stream WIM(1 ) to electro-oxidation according to (b).According to a second possibility provided by the present invention, the preferred process preferably comprises subjecting the liquid aqueous stream SLAI obtained according to (a.5) as a wastewater stream WIM(2) to electrooxidation according to (b).According to the present invention, it is a third possibility that prior to being subjected to electro-oxidation according to (b), the liquid aqueous stream SLAI obtained according to (a.5) is subjected to an aqueous treatment TAI with a liquid aqueous medium Li , thereby adjusting the pH of SLAI and obtaining a liquid stream SLAIP as pH-adjusted stream SLAI. Preferably, the liquid aqueous stream SLAIP to be subjected to electro-oxidation according to (b) exhibits a pH of at most 6.5, more preferably in the range of from 1 to 6.5, more preferably in the range of from 2 to 5, the pH being determined as described in Reference Example 1. Preferably, the liquid aqueous medium Li comprises at least one acid, more preferably at least one inorganic acid, wherein more preferably, the at least one inorganic acid is selected from the group consisting of sulfuric acid, phosphoric acid, hydrochloric acid, nitric acid, boric acid, hydrobromic acid, perchloric acid, hydroiodic acid, and mixtures of two or more thereof. The liquid aqueous stream SLAIP can then be subjected as a wastewater stream WIM(3) to electro-oxidation according to (b). Further according to the present invention, it is possible that a part of the liquid aqueous stream SLAI obtained according to (a.5) is subjected as a wastewater stream WIM(2) to electro-oxidation according to (b), and another part of the liquid aqueous stream SLAI obtained according to (a.5) is subjected to the aqueous treatment TAI . In this case, a liquid aqueous240460W0018 stream SLAI can be subjected as a wastewater stream WIM(2) to electro-oxidation according to (b) and / or a liquid aqueous stream SLAIP can be subjected as a wastewater stream WIM(3) to electro-oxidation according to (b) .According to the present invention, it is a fourth possibility that the liquid aqueous stream SLAIP comprises an aqueous phase PLAIPA and an organic phase PLAIPO, the process further comprising subjecting the stream SLAIP to a phase separation DPS2, obtaining a liquid aqueous stream SLAIPA comprising PLAIPA and being depleted in PLAIPO compared to SLAIP, and further obtaining a liquid organic stream SLAIPO comprising PLAIPO and being depleted in PLAIPA compared to SLAIP. In this case, it is preferred that the liquid aqueous stream SLAIPA is subjected as a wastewater stream WIM(4) to electro-oxidation according to (b). Further according to the present invention, it is possible that a part of the liquid aqueous stream SLAIP is subjected as a wastewater stream WIM(3) to electrooxidation according to (b), and another part of the liquid aqueous stream SLAIP is subjected to the phase separation DPS2. In this case, a liquid aqueous stream SLAIP can be subjected as a wastewater stream WIM(3) to electro-oxidation according to (b) and / or a liquid aqueous stream SLAIPA can be subjected as a wastewater stream WIM(4) to electrooxidation according to (b).According to the present invention, it is a fifth possibility that the process further comprises(a.6) subjecting the stream SLOI obtained according to (a.5) to an aqueous treatment TA2 with a liquid aqueous medium L2, obtaining a liquid stream SL2 comprising an aqueous phase PSL2A and an organic phase PSL2O, and subjecting the stream SL2 to a phase separation DPS3, obtaining a liquid aqueous stream SLA2, comprising PSL2A and being depleted in PSL2O compared to SL2, and further obtaining a liquid organic stream SLO2 comprising PSL2O and being depleted in PSL2A compared to SL2.Preferably, the liquid aqueous medium L2 according to (a.6) comprises at least one base, more preferably at least one inorganic base, wherein more preferably, the base is selected from the group consisting of ammonia, one or more alkali metal compounds, one or more alkaline earth metal compounds, and mixtures of two or more thereof, more preferably from the group consisting of one or more alkali metal compounds, more preferably from the group consisting of potassium hydroxide, sodium hydroxide, potassium carbonate, sodium carbonate, potassium bicarbonate, sodium bicarbonate, and mixtures of two or more thereof, more preferably from the group consisting of potassium hydroxide, sodium hydroxide, potassium carbonate, sodium carbonate, and mixtures of two or more thereof, more preferably from the group consisting of potassium hydroxide, sodium hydroxide and a mixture thereof, wherein more preferably, the liquid aqueous medium L2 comprises potassium hydroxide. The liquid aqueous stream SLA2 obtained according to (a.6) exhibits a pH preferably of at least 8, more preferably in the range of from 8 to 13, more preferably in the range of from 9 to 12, the pH being determined as described in Reference Example 1. It may be preferred that the liquid aqueous stream SLA2 obtained according to (a.6) is subjected as a wastewater stream WIM(5) to electro-oxidation according to (b).240460W0019According to the present invention, it is a sixth possibility that prior to being subjected to electro-oxidation according to (b), the liquid aqueous stream SLA2 obtained according to (a.6) is subjected to an aqueous treatment TA3 with a liquid aqueous medium L3, thereby adjusting the pH of SLA2 and obtaining a liquid stream SLA2P as pH-adjusted stream SLA2. Preferably, the liquid aqueous stream SLA2P to be subjected to electro-oxidation according to (b) exhibits a pH preferably of at most 6.5, more preferably in the range of from 1 to 6.5, more preferably in the range of from 2 to 5, the pH being determined as described in Reference Example 1. Preferably, the liquid aqueous medium L3 comprises at least one acid, preferably at least one inorganic acid, wherein more preferably, the at least one inorganic acid is selected from the group consisting of sulfuric acid, phosphoric acid, hydrochloric acid, nitric acid, boric acid, hydrobromic acid, perchloric acid, hydroiodic acid, and mixtures of two or more thereof. It may be preferred that the liquid aqueous stream SLA2P is subjected as a wastewater stream WIM(6) to electro-oxidation according to (b).According to the present invention, it is a seventh possibility that in case the liquid aqueous stream SLA2P comprises an aqueous phase PLA2PA and an organic phase PLA2PO, the process further comprises subjecting the stream SLA2P to a phase separation DPS4, obtaining a liquid aqueous stream SLA2PA comprising PLA2PA and being depleted in PLA2PO compared to SLA2P, and further obtaining a liquid organic stream SLA2PO comprising PLA2PO and being depleted in PLA2PA compared to SLA2P. It is preferred that the liquid aqueous stream SLA2PA is subjected as a wastewater stream WIM(7) to electro-oxidation according to (b) . Further according to the present invention, it is possible that a part of the liquid aqueous stream SLA2P is subjected as a wastewater stream WIM(6) to electro-oxidation according to (b), and another part of the liquid aqueous stream SLA2P is subjected to the phase separation DPS4. In this case, a liquid aqueous stream SLA2P can be subjected as a wastewater stream WIM(6) to electro-oxidation according to (b) and / or a liquid aqueous stream SLA2PA can be subjected as a wastewater stream WIM(4) to electro-oxidation according to (b) .Summarized, according to the present invention, at least one of the streams WIM(I) described herein is subjected to electro-oxidation OE according to (b). Preferably, at least one of the streams WIM(1 ), WIM(2), WIM(5), and WIM(7) is subjected to electro-oxidation OE according to (b), wherein it may be more preferred that at least two, or at least three, or all of the streams WIM(1 ), WIM(2), WIM(5), and WIM(7) are subjected to electro-oxidation OE according to (b). If two or more streams WIM(I) are subjected to electro-oxidation OE according to (b), it is possible according to the present invention that every stream WIM(I) is passed to an individual and suitably configured electro-oxidation unit UOEG) for electro-oxidation. It is further possible that all streams WIM(I) are suitably combined and passed, as combined stream, to one single electro-oxidation unit UOE(1 )■ It is further possible to combine two or more streams WIMO) and pass the combined stream to a suitably configured electro-oxidation unit UOEO), and pass at least one further stream WIM(I) and / or at least one further combined stream to at least one further suitably configured electrooxidation unit UOEG). From every electro-oxidation unit UOEO), a respectively purified wastewater stream Wpu(j) is obtained.240460W00110Regarding the condensation C according to (a.3), it is preferred that is performed at a temperature in the range of from 10 to 300 °C, more preferably in the range of from 20 to 200 °C, more preferably in the range of from 30 to 150 °C, more preferably in the range of from 40 to 100 °C, more preferably in the range of from 50 to 90 °C, more preferably in the range of from 60 to 80 °C. Preferably, the condensation C according to (a.3) is carried out in a gas-liquid separation unit UGL which comprises a total condenser or a partial condenser, preferably a partial condenser and a total condenser downstream of the partial condenser.Preferably, the solid-liquid separation DSL according to (a.4) is carried out in a solid-liquid separation unit USL which comprises, preferably consists of one or more of a decanter, a hydrocyclone, a filter, a settler and a centrifuge, preferably of one or more of a decanter, a filter, a filter and a settler tank, more preferably of one or more of a filter, a centrifuge and a decanter.According to the present invention, it may be preferred that downstream of (a.6), the process further comprises (a.7) subjecting at least a part of SLOI obtained according to (a.5) or at least a part of SLO2 obtained according to (a.6) to a distillation Di, obtaining a gaseous top stream comprising a gaseous aqueous stream SGD, and further obtaining a liquid organic bottom stream SLD being depleted in water compared to SLOI.According to the present invention, it may be preferred that at least one of the streams SLOFFPO, SLAIPO and SLA2PO as defined herein, more preferably at least one of the streams SLAIPO and SLA2PO as defined herein, are subjected, together with the stream SLOI, to distillation according to (a.7). If at least one of these streams is subjected to distillation in addition to the stream SLOI, two or more of streams to be subjected to distillation may be suitably combined prior to be subjected to distillation.According to another aspect, the present invention relates to a process, preferably a process as defined herein, comprising the step of converting at least a part of the CO2 as defined herein and / or at least a part of the H2 as defined herein and / or at least a part of the solids residue Rs as defined herein and / or at least a part of the liquid organic stream SLOI as defined herein and / or at least a part of the liquid organic stream SLAIPO as defined herein and / or at least a part of the liquid organic stream SLO2 as defined herein and / or at least a part of the liquid organic stream SLA2PO as defined herein and / or a chemical material obtainable or obtained by the process according as defined herein to obtain a product O.Preferably according to the present invention, it is preferred that independently from each other, a wastewater stream WIM(D provided according to (a) and subjected to (b) exhibits a TOC content in the range of from 100 weight-ppm to 20 weight-%, more preferably in the range of from 0.5 to 15 weight-%, more preferably in the range of from 1 to 7 weight-%, based on the total weight of WIM, the TOC content being determined as described in Reference Example 2. In case, for example, that from every wastewater stream WIM(I) a purified wastestream stream Wpu(j) is obtained, i.e. i = j, it may be preferred that for every I and j and independently of each other, , cpu(j) 0.9 CIMO), more preferably240460W00111 cpu(j) 0.8 CIMO), more preferably Cpu(j) 0.7 CIM(I), more preferably Cpu(j) 0.6 CIM(I), more preferably Cpu(j) 0.5 CIM(I), more preferably Cpu(j) 0.4 CIM(I), more preferably Cpu(j) 0.3 CIM(I), more preferably Cpu(j) 0.2 CIM(I), more preferably Cpu(j) 0.1 CIM(I).According to the present invention, it is preferred that the pyrolysis P is performed at a temperature in the range of from 250 to 800 °C, more preferably in the range of from 300 to 700 °C, more preferably in the range of from 350 to 650 °C, more preferably in the range of from 400 to 600 °C. Further preferably, the pyrolysis P is performed at a pressure in the range of from 0.1 to 5 bar(abs), more preferably in the range of from 0.3 to 4 bar(abs), more preferably in the range of from 0.5 to 3 bar(abs), more preferably in the range of from 0.7 to 2 bar(abs), more preferably in the range of from 0.9 to 1.5 bar(abs). Still further preferably, the pyrolysis P is performed in an atmosphere comprising at most 0.5 volume-%, more preferably at most 0.3 volume-%, more preferably at most 0.1 volume-% oxygen, wherein more preferably, the pyrolysis according to (ii) is performed in a substantially oxygen-free atmosphere, more preferably in an oxygen-free atmosphere. Yet further preferably, the pyrolysis P is carried out in a pyrolysis unit UP which comprises at least one pyrolysis reactor selected from the group consisting of a fluidized bed reactor, a moving bed reactor, a fixed bed reactor, an entrained flow reactor, an auger reactor, a screw reactor, a reaction extruder, a stirred tank reactor, a rotary kiln, a hammer mill reactor, and combinations of two or more thereof.According to the present invention, it is especially preferred that from the electro-oxidation OE according to (b), carried out in the at least one electro-oxidation unit UOE(D as described herein, CO2 and H2 are obtained. It is preferred that at least a part of said CO2 and / or at least a part of said H2 is / are used as a starting material to prepare at least one chemical product. In addition to said CO2 and / or said H2, additional CO2 and / or H2 can be employed to prepare said at least one chemical product, wherein it may be preferred that at least a part of said additional CO2 and / or H2 comes from at least one sustainable source.Generally, the process according to the process can be carried out continuously, as semi-continuously or in batch mode. Further, it is possible that one or more steps of the process of the present invention are carried out in continuous mode and one or more other steps are carried out in semi-continuous mode or in batch mode.According to another aspect, the present invention relates to a process, preferably a process as defined herein, comprising the step of converting at least a part of the CO2 as defined herein and / or at least a part of the H2 as defined herein and / or at least a part of the solids residue Rs as defined herein and / or at least a part of the liquid organic stream SLOI as defined herein and / or at least a part of the liquid organic stream SLAIPO as defined herein and / or at least a part of the liquid organic stream SLO2 as defined herein and / or at least a part of the liquid organic stream SLA2PO as defined herein and / or a chemical material obtainable or obtained by the process according as defined herein to obtain a product Q.240460W00112Preferably, the product Q is selected from: building block or monomer; or polymer, preferably polymer A, polymer composition, preferably polymer composition A, or polymer product, preferably polymer product A; or industrial use polymer, industrial use surfactant, descaling compound, industrial use biocide, industrial use solvent, industrial use dispersant, composition thereof or formulation thereof; or agrochemical composition, agrochemical formulation auxiliary or agrochemically active ingredient; or active pharmaceutical ingredient or intermediate thereof, pharmaceutical excipient, animal feed additive, human food additive, dietary supplements, aroma chemical or aroma composition; or aqueous polymer dispersion, preferably polyurethane or polyurethane - poly(meth)acrylate hybrid polymer dispersion, emulsion, binder for paper and fiber coatings, UV-curable acrylic polymer for hot melts and coatings polyisocyanates, hyperbranched polyester polyol, polymeric dispersant for inorganic binder compositions, unsaturated polyester polyol or 100% curable composition; or cosmetic surfactant, emollient, wax, cosmetic polymer, UV filter, further cosmetic ingredient or composition or formulation thereof; or polymer B, polymer composition B, coating composition, other functional composition, foil, molded body, coating or coated substrate.Preferably, the content of at least a part of the CO2 as defined herein and / or at least a part of the H2 as defined herein and / or at least a part of the solids residue Rs as defined herein and / or at least a part of the liquid organic stream SLOI as defined herein and / or at least a part of the liquid organic stream SLAIPO as defined herein and / or at least a part of the liquid organic stream SLO2 as defined herein and / or at least a part of the liquid organic stream SLA2PO as defined herein and / or a chemical material obtainable or obtained by the process according as defined herein in the product Q is 1 weight-% or more, preferably 2 weight-% or more, more preferably 5 weight-% or more, more preferably 15 weight-% or more, more preferably 30 weight-% or more, more preferably 40 weight-% or more, more preferably 60 weight-% or more, more preferably 80 weight-% or more, more preferably 90 weight-% or more, more preferably 95 weight-% or more; and / or the content of at least a part of the CO2 as defined herein and / or at least a part of the H2 as defined herein and / or at least a part of the solids residue Rs as defined herein and / or at least a part of the liquid organic stream SLOI as defined herein and / or at least a part of the liquid organic stream SLAIPO as defined herein and / or at least a part of the liquid organic stream SLO2 as defined herein and / or at least a part of the liquid organic stream SLA2PO as defined herein and / or a chemical material obtainable or obtained by the process according as defined herein in the product Q is 100 weight-% or less, preferably 95 weight-% or less, more preferably 90 weight-% or less, more preferably 50 weight-% or less, more preferably 25 weight-% or less, more preferably 10 weight-% or less; wherein the content is preferably determined based on identity preservation and / or segregation and / or mass balance and / or book and claim chain of custody models, preferably based on mass balance, preferably the International Sustainability and Carbon Certification (ISCC) standard.240460W00113The publication Prior Art Disclosure; Issue 684; paragraphs

[1000] to

[8005] ; ISSN: 2198-4786; published: February 12, 2024 will be regarded as Reference RF1, which is incorporated herein by reference in its entirety. Preferably, the product Q referred to in the preceding paragraph is a product as described in Reference RF1; paragraphs

[1000] to

[8005] , Preferably, the process described herein is further a process for the production of a product, preferably product Q.The converting step to obtain the product Q preferably comprises one or more step(s) as described below and can be performed by conventional methods well known to a person skilled in the art. The converting step preferably comprises one or more step(s) selected from: recycling, preferably depolymerizing, gasifying, pyrolyzing, and / or steam cracking; and / or purifying, preferably crystallizing, (solvent) extracting, distilling, evaporating, hydrotreating, absorbing, adsorbing and / or subjecting to ion exchanger; and / or assembling, preferably foaming, synthesizing, chemical conversion, chemically transforming, polymerizing and / or compounding; and / or forming, preferably foaming, extruding and / or molding; and / or finishing, preferably coating and / or smoothing.In addition, the one or more step(s) are described in detail in Reference RF1; paragraphs

[1000] to

[8005] ,The term "building block”, as used in the context of the product Q herein, comprises compounds, which are in a gaseous or liquid state under standard conditions of 0°C and 0.1 MPa. Building blocks are typically used in chemical industry to form secondary products, which provide a higher structural complexity and / or higher molecular weight than the building block on which the secondary product is based. The building block is preferably selected from the group consisting of hydrogen, carbon monoxide, carbon dioxide, ethylene oxide, ethylene glycols, syngas comprising a mixture of hydrogen and carbon monoxide, alkanes, alkenes, alkynes and aromatic compounds. The alkanes, alkenes, alkynes and aromatic compounds comprise in particular 1 to 12 carbon atoms, respectively.The term "monomer”, as used in the context of the product Q herein, comprises molecules, which can react with each other to form polymer chains by polymerization. The monomer is preferably selected from the group consisting of (meth)acrylic acid, salts of (meth)acrylic acid; in particular sodium, potassium and zinc salts; (meth)acrolein and (meth)acrylates. (Meth)acrylates comprising 1 to 22 carbon atoms are preferred, in particular comprising 1 to 8 carbon atoms. The terms (meth)acrylic acid, (meth)acrolein or (meth)acrylate relate to acrylic acid, acrolein or acrylate and also to methacrylic acid, methacrolein or methacrylate, where applicable. Further, the monomer can be selected from hexamethylenediamine (HMD) and adipic acid.The building block can further be an intermediate compound. The term "intermediate compound”, as used in the context of the product Q herein, comprises organic reagents, which are applied for formation of compounds with240460W00114 higher molecular complexity. The intermediate compound can be selected for example from the group consisting of phosgene, polyisocyanates and propylene oxide. The polyisocyanates are in particular aromatic di- and polyisocyanates, preferably toluene diisocyanate (TDI) and / or diphenylmethane diisocyanate (MDI).The building block and the monomer and typical converting step(s) to obtain the building block or monomer are described in more detail in paragraphs

[1000] to

[1012] of Reference RF1.The term "polymer A”, as used in the context of the product Q herein, comprises thermoplastic, e.g., polyamide or thermoplastic polyurethane, thermoset, e.g., polyurethane, elastomer, e.g., polybutadiene, or a copolymer or a mixture thereof and is defined in more detail in paragraphs

[2001] to

[2007] of Reference RF1.The term "polymer composition A”, as used in the context of the product Q herein, comprises all compositions comprising a polymer as described above and one or more additive(s), e.g. reinforcement, colorant, modifier and / or flame retardant, and is defined in more detail in paragraph

[2008] of Reference RF1.The term "polymer product A”, as used in the context of the product Q herein, comprises any product comprising the polymer A and / or polymer composition A as described above and is defined in more detail in paragraphs

[2009] and

[2010] of Reference RF1 .The step(s) to obtain the polymer, preferably polymer A, polymer composition, preferably polymer composition A or polymer product, preferably polymer product A is / are described in more detail in paragraph

[2011] of Reference RF1 .The term "industrial use polymer”, as used in the context of the product Q herein, comprises rheology, polycarboxylate, alkoxylated polyalkylenamine, alkoxylated polyalkylenimine, polyether-based, dye inhibition and soil release cleaning polymers defined in more detail in paragraphs

[3035] to

[3044] of Reference RF1. The term "industrial use surfactant”, as used in the context of the product Q herein, comprises non-ionic, anionic and amphoteric industrial use surfactants defined in more detail in paragraphs

[3008] to

[3034] of Reference RF1. The term "industrial use descaling compound”, as used in the context of the product Q herein, comprises non-phosphate based builders (NPB) and phosphonates (CoP) described in more detail in paragraphs

[3001] to

[3005] of Reference RF1. The term "industrial use biocide”, as used herein, refers to a chemical compound that kills microorganisms or inhibits their growth or reproduction defined in more detail in paragraphs

[3006] to

[3007] of Reference RF1. The term "industrial use solvent”, as used in the context of the product Q herein, comprises alkyl amides, alkyl lactamides, alkyl esters, lactate esters, alkyl diester, cyclic alkyl diester, cyclic carbonates, aromatic aldehydes and aromatic esters defined in more detail in paragraphs

[3045] to

[3055] of Reference RF1. The term "industrial use dispersant”, as used in the context of the product Q herein, comprises anionic and non-ionic industrial use dispersants defined in more detail in paragraphs

[3056] to

[3058] of Reference RF1. The term "composition and / or formulation thereof' with reference to the industrial use polymers, industrial use surfactants, descaling compounds and / or industrial use biocides refers to industrial use compositions and / or institutional use products and / or fabric and home care products240460W00115 and / or personal care products defined in more detail in paragraph

[3059] of Reference RF1. The converting step(s) to obtain the industrial use polymer, industrial use surfactant, descaling compound and / or industrial use biocide are defined in more detail in paragraph

[3060] of Reference RF1. The converting steps to obtain the industrial use composition or formulation of the industrial use polymer, industrial use surfactant, descaling compound and / or industrial use biocide are defined in more detail in paragraph

[3061] of Reference RF1.The term "agrochemical composition”, as used in the context of the product Q herein, typically relates to a composition comprising an agrochemically active ingredient and at least one agrochemical formulation auxiliary. Examples of agrochemical compositions, active ingredients and auxiliaries are described in more detail in Reference RF1, paragraph

[4001] ,The agrochemical composition may take the form of any customary formulation. The agrochemical compositions are prepared in a known manner, e.g. described by Mollet and Grubemann, Formulation technology, Wiley VCH, Weinheim, 2001; or Knowles, New developments in crop protection product formulation, Agrow Reports DS243, T&F Informa, London, 2005. The converting step(s) to obtain the agrochemically active ingredients and auxiliaries may be conducted in analogy to the production step(s) of their analogues that are based on petrochemicals or other precursors that are not gained by recycling processes. In addition, conversion to compounds mentioned in sections "Polymer” and "Cosmetic surfactant, emollient, wax, cosmetic polymer, UV filter, further cosmetic ingredient or compositions or formulations thereof' may be performed as described in these sections as well as the respective paragraphs in Reference RF1.The term active pharmaceutical ingredients and / or intermediates thereof, as used in the context of the product Q herein, comprises substances that provide pharmacological activity or other direct effect in the diagnosis, cure, mitigation, treatment, or prevention of disease, or to affect the structure or any function of the body. Intermediates thereof are isolated products that are generated during a multi-step route of synthesis of an active pharmaceutical ingredient. The term pharmaceutical excipients, as used in the context of the product Q herein, comprises compounds or compound mixtures used in compositions for various pharmaceutical applications, which are not substantially pharmaceutically active on itself. Active pharmaceutical ingredients and / or intermediates thereof and pharmaceutical excipients are defined in more detail in paragraph

[5001] of Reference RF1.The converting step(s) to obtain the active pharmaceutical ingredients and / or intermediates thereof and pharmaceutical excipients may comprise one or more synthesis steps and can be performed by conventional synthesis and techniques well known to a person skilled in the art.The terms animal feed additives, human food additives, dietary supplements, as used in the context of the product Q herein, comprises Vitamins, Pro-Vitamins and active metabolites thereof including intermediates and precursors, especially Vitamin A, B, E, D, K and esters thereof, like acetate, propionate, palmitate esters or alcohols thereof like240460W00116 retinol or salts thereof and any combinations thereof; Tetraterpenes, especially isoprenoids like carotenoids and xanthophylls including their intermediates and precursors as well as mixtures and derivates thereof, especially beta carotene, Canthaxanthin, Citranaxanthin, Astaxanthin, Zeaxanthin, Lutein, Lycopene, Apocarotenoids, and any combinations thereof; organic acids, especially formic acid, propionic acid and salts thereof, such as sodium, calcium or ammonium salts, and any combinations thereof, such as but not limited to mixtures of formic acid and sodium formiate, propionic acid and ammonium propionate, formic acid and propionic acid, formic acid and sodium formiate and propionic acid, propionic acid and sodium propionate and formic acid and sodium formiate; glycerides of carboxylic acids and short and medium chain fatty acids, conjugated linoleic acids, such as omega-6 fatty acid (C18:2) methyl ester and 1 ,2-propandiol and beverage stabilizers, such as polyvinylpyrrolidone-polymer or polyvinylimidazole / polyvinylpyrrolidone-copolymer. Animal feed additives, human food additives and dietary supplements are defined in more detail in paragraph

[5002] of Reference RF1.The converting step(s) to obtain the animal feed additives, human food additives, dietary supplements may comprise one or more synthesis steps and can be performed by conventional synthesis and techniques well known to a person skilled in the art.The terms aroma chemical and aroma composition as used in the context of the product Q herein, comprise a volatile organic substance with a molecular weight between 70-250 g / mol comprising a functional group with a carbon skeleton of C5-C16 carbon atoms comprising linear, branched, cyclic, for example with a ring size of C5-C18, bicyclic or tricyclic aliphatic chains and but not necessarily one or more unsaturated structural elements like double bonds, triple bonds, aromatics or heteroaromatics and preferably the one or more additional functional groups are selected from alcohol, ether, ester, ketone, aldehyde, acetal, carboxylic acid, nitrile, thiol, amine. In one aspect, the aroma chemical is a terpene-based aroma chemical, for example selected from monoterpenes and monoterpenoids, sesquiterpenes and sesquiterpenoids, diterpenes, triterpenes or tetraterpenes. Aroma chemicals can be combined with further aroma chemicals to give an aroma composition. Aroma chemicals and aroma compositions are defined in more detail in paragraph

[5003] of Reference RF1.The converting step(s) to obtain the aroma chemical and aroma composition may comprise one or more synthesis steps and can be performed by conventional synthesis and techniques well known to a person skilled in the art.The term "aqueous polymer dispersion”, as used in the context of the product Q herein, comprises aqueous composition(s) comprising dispersed polymer(s) and is defined in more detail in the section

[6001] entitled "aqueous polymer dispersion” of Reference RF1. The dispersed polymer(s) may be selected from acrylic emulsion polymer(s), styrene acrylic emulsion polymer(s), styrene butadiene dispersion(s), aqueous dispersion(s) comprising composite particles, acrylate alkyd hybrid dispersion(s), polyurethane(s) (including UV-curable polyurethanes) and polyurethane - poly(meth)acrylate hybrid polymer(s). The term "emulsion polymer”, as used herein, comprises polymer(s) made by free-radical emulsion polymerization. Aqueous polyurethane dispersion(s) are defined in more detail in the section240460W00117

[6002] entitled "Polyurethane dispersions” of Reference RF1. UV-curable polyurethane(s) is / are defined in more detail in the section

[6017] of Reference RF1. Polyurethane - poly(meth)acrylate hybrid polymer(s) is / are defined in more detail in the section

[6016] of Reference RF1.The term "polymeric dispersant”, as used in the context of the product Q herein, comprises preferably polymer(s) comprising polyether side chain, in particular polycarboxylate ether polymer(s) and polycondensation product(s) defined in more detail in paragraph

[6020] entitled "Polymeric dispersant” of Reference RF1.The converting (polymerization) step(s) to obtain the aqueous polymer dispersion(s) comprising emulsion polymer(s) is / are defined in more detail in the section

[6003] entitled "Emulsion polymerization” of Reference RF1.The converting (polymerization) step(s) to obtain the aqueous polyurethane dispersion(s) is / are defined in more detail in the section

[6014] entitled "Process for the preparation of aqueous poly-urethane dispersions” and section [6017)] entitled "Aqueous UV-curable polyurethane dispersions, their preparation and use and compositions containing them” of Reference RF1.Composition(s) and uses of aqueous polymer dispersion(s) and of polymeric dispersant(s) are defined in more detail in the following sections of Reference RF1 : section

[6004] entitled "Uses of aqueous polymer dispersions”, section

[6005] entitled "Binders for architectural and construction coatings” section

[6006] entitled "Binders for paper coating” section

[6007] entitled "Binders for fiber bonding” section

[6008] entitled "Adhesive polymers and adhesive compositions” section

[6015] entitled "Aqueous polyurethane dispersions suitable for use in coating compositions” section

[6016] entitled "Aqueous polyurethane - poly(meth)acrylate hybride polymer dispersions suitable for use in coating compositions” section

[6017] entitled "Aqueous UV-curable polyurethane dispersions, their preparation and use and compositions containing them” section

[6018] entitled "Inorganic binder compositions comprising polymeric dispersants and their use”

[6019] 100% curable coating compositionsUV-crosslinkable poly(meth)acrylate(s) and its / their uses are defined in more detail in section

[6009] entitled "UV- crossli nkable poly(meth)acrylates for use in UV-curable solvent-free hot melt adhesives and their use for making pressure-sensitive self-adhesive articles” of Reference RF1.Polyisocyanate(s), composition(s) comprising them and their uses are defined in more detail in section

[6010] entitled "Polyisocyanates” of Reference RF1.240460W00118Hyperbranched polyester polyol(s) and its / their uses are defined in more detail in section

[6011] entitled "Organic solvent based hyperbranched polyester polyols suitable for use in coating compositions” of Reference RF1. The converting step(s) to obtain the hyperbranched polyester polyols is / are defined in more detail in the section

[6012] entitled "Preparation of organic solvent based hyperbranched polyester polyols” of Reference RF1 . Coating composition(s) comprising hyperbranched polyester polyol(s), polyisocyanate(s) and additive(s) and substrate(s) coated therewith are defined in more detail in section

[6013] entitled "Organic solvent based two component coating compositions comprising hyperbranched polyester polyols and polyisocyanates” of Reference RF1.Unsaturated polyester polyol(s), solvent-based coating composition(s) comprising said unsaturated polyester polyol(s) and substrate(s) for coating with said coating composition(s) are defined in more detail in section

[6018] entitled "Organic solvent based coating composition comprising unsaturated polyester polyols” of Reference RF1. 100% curable coating composition(s) is / are defined in more detail in section

[6019] of Reference RF1.Polymeric dispersant(s) for inorganic binder compositions is / are defined in more detail in section

[6020] of Reference RF1. The inorganic binder composition(s) comprising the polymeric dispersants and their use are defined in more detail in section

[6021] of Reference RF1. The converting step(s) to obtain the polymeric dispersant(s) are defined in more detail in section

[6020] of Reference RF1. The term "inorganic binder composition” comprising the polymeric dispersant(s), as used herein, comprises preferably in particular hydraulically setting compositions and compositions comprising calcium sulfate and is defined in more detail in section

[6021] of Reference RF1 entitled "Inorganic binder compositions comprising the polymeric dispersant and their use”. Specific building material formulation(s) comprising polymeric dispersant(s) or building product(s) produced by a building material formulation comprising a polymeric dispersant are disclosed in more detail in section

[6021] of Reference RF1.The term "cosmetic surfactant”, as used in the context of the product Q herein, comprises non-ionic, anionic, cationic and amphoteric surfactants and is defined in more detail in paragraph

[7002] of Reference RF1 . The term "emollient”, as used in the context of the product Q herein, refers to a chemical compound used for protecting, moisturizing, and / or lubricating the skin and is defined in more detail in paragraph

[7003] of Reference RF1. The term "wax”, as used in the context of the product Q herein, comprises pearlizers and opacifiers and is defined in more detail in paragraph

[7004] of Reference RF1 . The term "cosmetic polymer”, as used in the context of the product Q herein, comprises any polymer that can be used as an ingredient in a cosmetic formulation and is defined in more detail in paragraph

[7005] of Reference RF1 . The term "UV filter”, as used in the context of the product Q herein, refers to a chemical compound that blocks or absorbs ultraviolet light and is defined in more detail in paragraph

[7006] of Reference RF1 . The term "further cosmetic ingredient”, as used in the context of the product Q herein, comprises any ingredient suitable for making a cosmetic formulation. Several sources disclose cosmetically acceptable ingredients. E. g. the database Cosing on the internet pages of the European Commission discloses cosmetic ingredients and the International Cosmetic Ingredient Dictionary and Handbook, edited by the Personal Care Products Council (PCPC), discloses cosmetic ingredients. The term "composition and / or formulation thereof' with reference to the cosmetic240460W00119 surfactant, emollient, wax, cosmetic polymer, UV filter and / or further cosmetic ingredient refers to personal care and / or cosmetic compositions or formulations defined in more detail in paragraph

[7007] of Reference RF1 . The converting step(s) to obtain the cosmetic surfactant, emollient, wax, cosmetic polymer, UV filter or further cosmetic ingredient is / are defined in more detail in paragraph

[7008] of Reference RF1.The terms "polymer B”, "polymer composition B”, "coating composition”, "other functional composition”, "foil”, "molded body”, "coating” and "coated substrate” are well known to the person skilled in the art and are defined in more detail from paragraph

[8000] to

[8005] of Reference RF1.The present invention is further illustrated by the following first set of embodiments and combinations of embodiments resulting from the dependencies and back-references as indicated. In particular, it is noted that in each instance where a range of embodiments is mentioned, for example in the context of a term such as "The process of any one of embodiments 1 to 4", every embodiment in this range is meant to be explicitly disclosed for the skilled person, i.e. the wording of this term is to be understood by the skilled person as being synonymous to "The process of any one of embodiments 1, 2, 3 and 4". Further, it is explicitly noted that the following set of embodiments represents a suitably structured part of the general description directed to preferred aspects of the present invention, and, thus, suitably supports, but does not represent the claims of the present invention.1 . A wastewater purification process, comprising(a) providing at least one wastewater stream WIMO) comprising organic material and exhibiting a TOC content CIMO), wherein the at least one wastewater stream WIMO) is obtainable or obtained by working up at least one stream resulting from a thermal decomposition P of a solid organic material Ms;(b) subjecting at least one of the wastewater streams WIM(I) to electrooxidation OE in at least one electrolysis cell comprising a boron-doped diamond (BDD) anode and a cathode, obtaining from the at least one wastewater stream WIM(I) at least one purified wastewater stream Wpu(j) exhibiting a TOC content Cpu(j) with cpu(j) < i).2. The process of embodiment 1 , wherein the thermal decomposition P comprises, preferably is a pyrolysis P.3. The process of embodiment 1 or 2, wherein the BDD anode according to (b) exhibits a BDD coating supported on a support material, the support material preferably being one or more of Nb, Ta, Si, graphite, an electrically conductive ceramic, wherein the support preferably comprises Nb.4. The process of embodiment 2 or 3, wherein the BDD coating exhibits a thickness in the range of from 5 to 50 pm, preferably in the range of from 5 to 30 pm, more preferably in the range of from 5 to 15 pm.240460W001205. The process of any one of embodiments 2 to 4, wherein the BDD coating exhibits a boron doping in the range of from 0.01 to 3 weight-%, preferably in the range of from 0.05 to 1.5 weight-%, more preferably in the range of from 0.1 to 0.5 weight-%, based on the total weight of the BDD coating.6. The process of any one of embodiments 1 to 5, wherein the cathode according to (b) exhibits a BDD coating supported on a support material.7. The process of embodiment 6, wherein the support material is preferably one or more of Nb, Ta, Si, graphite, an electrically conductive ceramic, wherein more preferably, the support comprises Nb.8. The process of any one of embodiments 1 to 7, wherein the cathode according to (b) is a Pt cathode, a Ni cathode or a steel cathode.9. The process of any one of embodiments 1 to 8, wherein in the electrolysis cell according to (b), the gap between the anode and the cathode is in the range of from 0.5 to 10 mm, preferably in the range of from 1 to 5 mm.10. The process of any one of embodiments 1 to 9, wherein the electro-oxidation according to (b) is carried out at a temperature of the wastewater in the electrolysis cell in the range of from 0 to 85 °C, preferably in the range of from 10 to 80 °C, more preferably in the range of from 20 to 75 °C.11 . The process of any one of embodiments 1 to 10, wherein the electro-oxidation according to (b) is carried out at a specific energy value in the range of from 0.1 to 5 MWh / m3.12. The process of any one of embodiments 1 to 11, wherein the electro-oxidation according to (b) is carried out at a current density in the range of from 5 to 250 mA / cm2, preferably in the range of from 10 to 150 mA / cm2, more preferably in the range of from 50 to 100 mA / cm2.13. The process of any one of embodiments 1 to 12, wherein the solid material Ms according to (a) comprises or consists of a waste material, preferably one or more of a plastic waste material and a textile waste material, more preferably a plastic waste material, more preferably a mixed plastic waste material.14. The process of any one of embodiments 1 to 13, wherein the solid material Ms according to (a) comprises one or more polymers, preferably one or more of a polyamide (PA) including polyamide 6 and PA66; a polyisocyanate polyaddition product, preferably one or more of a polyurethane (PU), a thermoplastic polyurethane (TPU), a polyurea and a polyisocyanurate (PIR); a low-density polyethylene (LDPE); a high- density polyethylene (HDPE); a polyethylene (PE); a polypropylene (PP); a polyvinyl chloride (PVC); a240460W00121 polyvinyl acetate (PVA); a polystyrene (PS); a poly acrylonitrile butadiene styrene (ABS); a polystyreneacrylonitrile (SAN); a polyacrylate styrene acrylonitrile (ASA); a polytetrafluoroethylene (PTFE); a poly(methyl acrylate) (PMA); a poly(methyl methacrylate) (PMMA); a polybutadiene (BR, PBD); a poly(cis-1 ,4- isoprene); a poly(trans-1 ,4-isoprene); a polyoxy-methylene (POM); a polyethylene terephthalate (PET); a polybutylene terephthalate (PBT); a polybutylene adipate co-terephthalate (PBAT); a polyester (PES); a polyether sulfone (PESO); a polyhydroxyalkanoate (PHA); a poly-3-hydroxybutyrate (P3HB); a poly-4- hydroxybutyrate (P4HB); a polyhydroxyvalerate (PHV); a polyhydroxyhexanoate (PHH); a polyhydroxyoctanoate (PHO); a polylactic acid (PLA); a polysulfone (PSU); a polyphenylene sulfone (PPSU); a polycarbonate (PC); a polyether ether ketone (PEEK); a poly(p-phenylene oxide) (PPO); a poly(p-phenylene ether) (PPE); and a copolymer of two or more thereof, more preferably one or more of a polyolefin, a polyester, a polycarbonate, a polyurethane and a polyamide other than polyamide 6.15. The process of any one of embodiments 1 to 14, wherein providing the at least one wastewater stream WIM(I) according to (a) comprises(a.1 ) providing the solid material Ms;(a.2) subjecting the solid material Ms provided according to (a.1 ) to a pyrolysis P, obtaining an intermediate gas stream SGI;(a.3) subjecting SGI obtained according to (a.2) to a condensation C, obtaining a solids-containing liquid stream SSL comprising an aqueous phase PSLA and an organic phase PSLO, and further obtaining an off-gas stream SOFF;(a.4) subjecting the stream SSL obtained according to (a.3) to a solid-liquid separation DSL, obtaining a liquid stream SLI comprising PSLA and PSLO and being depleted in solids compared to MSL, and further obtaining a solids residue Rs;(a.5) subjecting the stream SLI to a phase separation DRSI, obtaining a liquid aqueous stream SLAI comprising PSLA and being depleted PSLO compared to SLI, and further obtaining a liquid organic stream SLOI comprising PSLO and being depleted in PSLA compared to SLI.16. The process of embodiment 15, further comprising subjecting the off-gas stream SOFF obtained according to (a.3) to an aqueous treatment TAO with a liquid aqueous medium Lo, obtaining a liquid aqueous stream SLOFF.17. The process of embodiment 16, wherein the liquid aqueous stream SLOFF exhibits a pH of at least 8, preferably in the range of from 8 to 13, more preferably in the range of from 9 to 12, the pH being determined as described in Reference Example 1.18. The process of embodiment 16 or 17, wherein the liquid aqueous medium Lo comprises at least one base, preferably at least one inorganic base, wherein more preferably, the base is selected from the group consisting of ammonia, one or more alkali metal compounds, one or more alkaline earth metal compounds,240460W00122 and mixtures of two or more thereof, more preferably from the group consisting of one or more alkali metal compounds, more preferably from the group consisting of potassium hydroxide, sodium hydroxide, potassium carbonate, sodium carbonate, potassium bicarbonate, sodium bicarbonate, and mixtures of two or more thereof, more preferably from the group consisting of potassium hydroxide, sodium hydroxide, potassium carbonate, sodium carbonate, and mixtures of two or more thereof, more preferably from the group consisting of potassium hydroxide, sodium hydroxide and a mixture thereof, wherein more preferably, the liquid aqueous medium Lo comprises sodium hydroxide.19. The process of any one of embodiments 16 to 18, wherein the liquid aqueous stream SLOFF is subjected as a wastewater stream WIM(1) to electro-oxidation according to (b).20. The process of any one of embodiments 15 to 19, wherein the liquid aqueous stream SLAI obtained according to (a.5) is subjected as a wastewater stream WIM(2) to electro-oxidation according to (b).21 . The process of any one of embodiments 15 to 19, wherein, prior to being subjected to electro-oxidation according to (b), the liquid aqueous stream SLAI obtained according to (a.5) is subjected to an aqueous treatment TAI with a liquid aqueous medium Li, thereby adjusting the pH of SLAI and obtaining a liquid stream SLAIP as pH-adjusted stream SLAI.22. The process of embodiment 21 , wherein the liquid aqueous stream SLAIP to be subjected to electro-oxidation according to (b) exhibits a pH of at most 6.5, preferably in the range of from 1 to 6.5, more preferably in the range of from 2 to 5, the pH being determined as described in Reference Example 1.23. The process of embodiment 21 or 22, wherein the liquid aqueous medium Li comprises at least one acid, preferably at least one inorganic acid, wherein more preferably, the at least one inorganic acid is selected from the group consisting of sulfuric acid, phosphoric acid, hydrochloric acid, nitric acid, boric acid, hydrobromic acid, perchloric acid, hydroiodic acid, and mixtures of two or more thereof.24. The process of any one of embodiments 21 to 23, wherein the liquid aqueous stream SLAIP is subjected as a wastewater stream WIM(3) to electro-oxidation according to (b).25. The process of embodiment 21 , wherein the liquid aqueous stream SLAIP comprises an aqueous phase PLAIPA and an organic phase PLAIPO, the process further comprising subjecting the stream SLAIP to a phase separation DPS2, obtaining a liquid aqueous stream SLAIPA comprising PLAIPA and being depleted in PLAIPO compared to SLAIP, and further obtaining a liquid organic stream SLAIPO comprising PLAIPO and being depleted in PLAIPA compared to SLAIP.240460W0012326. The process of embodiment 25, wherein the liquid aqueous stream SLAIPA is subjected as a wastewater stream WIM(4) to electro-oxidation according to (b).27. The process of any one of embodiments 15 to 26, further comprising(a.6) subjecting the stream SLOI obtained according to (a.5) to an aqueous treatment TA2 with a liquid aqueous medium L2, obtaining a liquid stream SL2 comprising an aqueous phase PSL2A and an organic phase PSL2O, and subjecting the stream SL2 to a phase separation DPS3, obtaining a liquid aqueous stream SLA2, comprising PSL2A and being depleted in PSL2O compared to Si_2, and further obtaining a liquid organic stream SLO2 comprising PSL2O and being depleted in PSL2A compared to SL2.28. The process of embodiment 27, wherein the liquid aqueous medium L2 according to (a.6) comprises at least one base, preferably at least one inorganic base, wherein more preferably, the base is selected from the group consisting of ammonia, one or more alkali metal compounds, one or more alkaline earth metal compounds, and mixtures of two or more thereof, more preferably from the group consisting of one or more alkali metal compounds, more preferably from the group consisting of potassium hydroxide, sodium hydroxide, potassium carbonate, sodium carbonate, potassium bicarbonate, sodium bicarbonate, and mixtures of two or more thereof, more preferably from the group consisting of potassium hydroxide, sodium hydroxide, potassium carbonate, sodium carbonate, and mixtures of two or more thereof, more preferably from the group consisting of potassium hydroxide, sodium hydroxide and a mixture thereof, wherein more preferably, the liquid aqueous medium L2 comprises potassium hydroxide.29. The process of embodiment 27 or 28, wherein the liquid aqueous stream SLA2 obtained according to (a.6) exhibits a pH of at least 8, preferably in the range of from 8 to 13, more preferably in the range of from 9 to 12, the pH being determined as described in Reference Example 1.30. The process of any one of embodiments 27 to 29, wherein the liquid aqueous stream SLA2 obtained according to (a.6) is subjected as a wastewater stream WIM(5) to electro-oxidation according to (b).31 . The process of any one of embodiments 27 to 29, wherein, prior to being subjected to electro-oxidation according to (b), the liquid aqueous stream SLA2 obtained according to (a.6) is subjected to an aqueous treatment TA3 with a liquid aqueous medium L3, thereby adjusting the pH of SLA2 and obtaining a liquid stream SLA2P as pH-adjusted stream SLA2.32. The process of embodiment 31 , wherein the liquid aqueous stream SLA2P to be subjected to electro-oxidation according to (b) exhibits a pH of at most 6.5, preferably in the range of from 1 to 6.5, more preferably in the range of from 2 to 5, the pH being determined as described in Reference Example 1.240460W0012433. The process of embodiment 31 or 32, wherein the liquid aqueous medium L3 comprises at least one acid, preferably at least one inorganic acid, wherein more preferably, the at least one inorganic acid is selected from the group consisting of sulfuric acid, phosphoric acid, hydrochloric acid, nitric acid, boric acid, hydrobromic acid, perchloric acid, hydroiodic acid, and mixtures of two or more thereof.34. The process of any one of embodiments 31 to 33, wherein the liquid aqueous stream SLA2P is subjected as a wastewater stream WIM(6) to electro-oxidation according to (b).35. The process of any one of embodiments 31 to 33, wherein the liquid aqueous stream SLA2P comprises an aqueous phase PLA2PA and an organic phase PLA2PO, the process further comprising subjecting the stream SLA2P to a phase separation DPS4, obtaining a liquid aqueous stream SLA2PA comprising PLA2PA and being depleted in PLA2PO compared to SLA2P, and further obtaining a liquid organic stream SLA2PO comprising PLA2PO and being depleted in PLA2PA compared to SLA2P.36. The process of embodiment 35, wherein the liquid aqueous stream SLA2PA is subjected as a wastewater stream WIM(7) to electro-oxidation according to (b).37. The process of any one of embodiments 15 to 36, wherein the condensation C according to (a.3) is performed at a temperature in the range of from 10 to 300 °C, preferably in the range of from 40 to 100 °C, more preferably in the range of from 50 to 90 °C, more preferably in the range of from 60 to 80 °C.38. The process of any one of embodiments 15 to 37, wherein the condensation C according to (a.3) is carried out in a gas-liquid separation unit UGL which comprises a total condenser or a partial condenser, preferably a partial condenser.39. The process of any one of embodiments 15 to 38, wherein the solid-liquid separation DSL according to (a.4) is carried out in a solid-liquid separation unit USL which comprises, preferably consists of one or more of a decanter, a hydrocyclone, a filter, a settler and a centrifuge, preferably of one or more of a decanter, a filter, a filter and a settler tank, more preferably of one or more of a filter, a centrifuge and a decanter.40. The process of any one of embodiments 15 to 39, further comprising(a.7) subjecting at least a part of SLOI obtained according to (a.5) or at least a part of SLO2 obtained according to (a.6) to a distillation Di, obtaining a gaseous top stream comprising a gaseous aqueous stream SGD, and further obtaining a liquid organic bottom stream SLD being depleted in water compared to SLOI.240460W0012541 . The process of any one of embodiments 1 to 40, wherein independent from each other, a wastewater stream WIMO) provided according to (a) and subjected to (b) exhibits a TOC content in the range of from 100 weight- ppm to 20 weight-%, preferably in the range of from 0.5 to 15 weight-%, more preferably in the range of from 1 to 7 weight-%, based on the total weight of WIM, the TOC content being determined as described in Reference Example 2.42. The process of any one of embodiments 1 to 41 , wherein from every wastestream WIMO), a purified wastestream Wpu(j) with I = j is obtained.43. The process of any one of embodiments 1 to 42, wherein CRUO) - 0'9 CIMC), preferably cpu(j) 0.8 CIMO), more preferably CRUO) -ciivi(i), more preferably Cpu(j) 0.6 CIMO), more preferably Cpu(j) 0.5 CIMO),morepreferably Cpu(j) 0.4 CIMO), more preferably Cpu(j) 0.3 CIMO), more preferably Cpu(j) 0.2 CIMO), more preferably Cpu(j) 0.1 CIM(I).44. The process of any one of embodiments 1 to 43, wherein the pyrolysis P is a thermal decomposition under inert conditions and results in a gas fraction, a liquid fraction and a solid fraction, the solid fraction preferably being a char fraction, wherein the gas fraction, the liquid fraction and the solid fraction are separated from each other.45. The process of any one of embodiments 1 to 44, wherein the pyrolysis P is performed at a temperature in the range of from 250 to 800 °C, preferably in the range of from 300 to 700 °C, more preferably in the range of from 350 to 650 °C, more preferably in the range of from 400 to 600 °C.46. The process of any one of embodiments 1 to 45, wherein the pyrolysis P is performed at a pressure in the range of from 0.1 to 5 bar(abs), preferably in the range of from 0.5 to 3 bar(abs), more preferably in the range of from 0.9 to 1.5 bar(abs).47. The process of any one of embodiments 1 to 46, wherein the pyrolysis P is performed in an atmosphere comprising at most 0.5 volume-%, preferably at most 0.3 volume-%, more preferably at most 0.1 volume-% oxygen, wherein more preferably, the pyrolysis according to (ii) is performed in an oxygen-free atmosphere.48. The process of any one of embodiments 1 to 47, wherein the pyrolysis P is carried out in a pyrolysis unit UP which comprises at least one pyrolysis reactor selected from the group consisting of a fluidized bed reactor, a moving bed reactor, a fixed bed reactor, an entrained flow reactor, an auger reactor, a screw reactor, a reaction extruder, a stirred tank reactor, a rotary kiln, a hammer mill reactor, and combinations of two or more thereof.240460W0012649. The process of any one of embodiments 1 to 48, wherein from the electro-oxidation OE according to (b), CO2 and H2 are obtained.50. A process, preferably according to any one of embodiments 1 to 49, comprising the step of converting at least a part of the CO2 as defined in embodiment 49 and / or at least a part of the H2 as defined in embodiment 49 and / or at least a part of the solids residue Rs as defined in embodiment 15 and / or at least a part of the liquid organic stream SLOI as defined in embodiment 15 and / or at least a part of the liquid organic stream SLAIPO as defined in embodiment 25 and / or at least a part of the liquid organic stream SLO2 as defined in embodiment 27 and / or at least a part of the liquid organic stream SLA2PO as defined in embodiment 35 and / or a chemical material obtainable or obtained by the process according to any one of embodiments 1 to 49 to obtain a product Q.51 . The process of embodiment 50, wherein the product Q is selected from: building block or monomer; or polymer, preferably polymer A, polymer composition, preferably polymer composition A, or polymer product, preferably polymer product A; or industrial use polymer, industrial use surfactant, descaling compound, industrial use biocide, industrial use solvent, industrial use dispersant, composition thereof or formulation thereof; or agrochemical composition, agrochemical formulation auxiliary or agrochemically active ingredient; or active pharmaceutical ingredient or intermediate thereof, pharmaceutical excipient, animal feed additive, human food additive, dietary supplements, aroma chemical or aroma composition; or aqueous polymer dispersion, preferably polyurethane or polyurethane - poly(meth)acrylate hybrid polymer dispersion, emulsion, binder for paper and fiber coatings, UV-curable acrylic polymer for hot melts and coatings polyisocyanates, hyperbranched polyester polyol, polymeric dispersant for inorganic binder compositions, unsaturated polyester polyol or 100% curable composition; or cosmetic surfactant, emollient, wax, cosmetic polymer, UV filter, further cosmetic ingredient or composition or formulation thereof; or polymer B, polymer composition B, coating composition, other functional composition, foil, molded body, coating or coated substrate.52. The process of embodiment 50 or 51, wherein the content of at least a part of the CO2 as defined in embodiment 49 and / or at least a part of the H2 as defined in embodiment 49 and / or at least a part of the solids residue Rs as defined in embodiment 15 and / or at least a part of the liquid organic stream SLOI as defined in embodiment 15 and / or at least a part of the liquid organic stream SLAIPO as defined in embodiment 25 and / or at least a part of the liquid organic stream SLO2 as defined in embodiment 27 and / or at least a part of the liquid organic stream SLA2PO as defined in embodiment 35 and / or a chemical material obtainable or obtained by the process according to any one of240460W00127 embodiments 1 to 49 in the product Q is 1 weight-% or more, preferably 2 weight-% or more, more preferably 5 weight-% or more, more preferably 15 weight-% or more, more preferably 30 weight-% or more, more preferably 40 weight-% or more, more preferably 60 weight-% or more, more preferably 80 weight-% or more, more preferably 90 weight-% or more, more preferably 95 weight-% or more; and / or wherein the content of at least a part of the CO2 as defined in embodiment 49 and / or at least a part of the H2 as defined in embodiment 49 and / or at least a part of the solids residue Rs as defined in embodiment 15 and / or at least a part of the liquid organic stream SLOI as defined in embodiment 15 and / or at least a part of the liquid organic stream SLAIPO as defined in embodiment 25 and / or at least a part of the liquid organic stream SLO2 as defined in embodiment 27 and / or at least a part of the liquid organic stream SLA2PO as defined in embodiment 35 and / or a chemical material obtainable or obtained by the process according to any one of embodiments 1 to 49 in the product Q is 100 weight-% or less, preferably 95 weight-% or less, more preferably 90 weight-% or less, more preferably 50 weight-% or less, more preferably 25 weight-% or less, more preferably 10 weight-% or less; and preferably wherein the content is determined based on identity preservation and / or segregation and / or mass balance and / or book and claim chain of custody models, preferably based on mass balance, preferably the International Sustainability and Carbon Certification (ISCC) standard.It is explicitly noted that the above set of embodiments represents a suitably structured part of the general description directed to preferred aspects of the present invention, and, thus, suitably supports, but is not the set of claims of the present invention.In the context of the present invention, a term "X is one or more of A, B and C”, wherein X is a given feature and each of A, B and C stands for specific realization of said feature, is to be understood as disclosing that X is either A, or B, or C, or A and B, or A and C, or B and C, or A and B and C. In this regard, it is noted that the skilled person is capable of transfer to above abstract term to a concrete example, e.g. where X is a chemical element and A, B and C are concrete elements such as Li, Na, and K, or X is a temperature and A, B and C are concrete temperatures such as 10 °C, 20 °C, and 30 °C. In this regard, it is further noted that the skilled person is capable of extending the above term to less specific realizations of said feature, e.g. "X is one or more of A and B” disclosing that X is either A, or B, or A and B, or to more specific realizations of said feature, e.g. "X is one or more of A, B, C and D”, disclosing that X is either A, or B, or C, or D, or A and B, or A and C, or A and D, or B and C, or B and D, or C and D, or A and B and C, or A and B and D, or B and C and D, or A and B and C and D.The present invention is further illustrated by the following examples and figures.Brief description of the figures240460W00128Fig. 1 shows an overview scheme illustrating preferred possibilities how to provide wastewater streams according to(a) of the present invention which are then subjected to electro-oxidation OE according to (b) .According to Figure 1, a suitably provided solid organic material Ms is subjected to thermal decomposition P, preferably pyrolysis P. From P, an intermediate gas stream SGI is obtained which is subjected to a condensation C from which, in turn, a solids-containing stream SSL and an off-gas stream SOFF are obtained.As far the off-gas stream SOFF is concerned, it is possible to subject it to an aqueous treatment TAO with a liquid aqueous medium Lo, and from this treatment, a liquid aqueous stream SLOFF is obtained. This liquid aqueous stream SLOFF is then passed as a wastewater stream WIM(1) to electro-oxidation OE according to (b). This is a preferred possibility according to the present invention.As far as the solids-containing stream SSL obtained from the condensation C is concerned, it is subjected to a solidliquid separation DSL from which a liquid stream Sn comprising an aqueous phase PSLA and an organic phase PSLO is obtained. This stream Sn is depleted in solids compared to the stream SSL. Further from the solid-separation DSL, a solids residue Rs is obtained which can be used elsewhere as described herein. Subsequently, the stream SLI is passed to a phase separation DPSI from which a liquid aqueous stream SLAI comprising PSLA and being depleted PSLO compared to SLI, and further a liquid organic stream SLOI comprising PSLO and being depleted in PSLA compared to SLI are obtained.As far as the liquid aqueous stream SLAI is concerned, it is possible to pass it as a wastewater stream WIM(2) to electro-oxidation OE according to (b). This is a preferred possibility according to the present invention. Further according to the present invention, it is possible to subject the liquid aqueous stream SLAI to an aqueous treatment TAI with a liquid aqueous medium Li, thereby adjusting the pH of SLAI and obtaining a liquid stream SLAIP as a pH- adjusted stream SLAI. It is noted that according to the present invention, it is also possible to pass a part of the stream SLAI to electro-oxidation OE according to (b) and to subject another part of the stream SLAI to the aqueous treatment TAI. Regarding the liquid stream SLAIP, it is possible to pass it as a wastewater stream WIM(3) to electrooxidation OE according to (b). Further according to the present invention, it is possible to subject the liquid aqueous stream SLAIP in case it comprises an aqueous phase PLAIPA and an organic phase PLAIPO to a phase separation DPS2, obtaining a liquid aqueous stream SLAIPA comprising PLAIPA and being depleted in PLAIPO compared to SLAIP, and further obtaining a liquid organic stream SLAIPO comprising PLAIPO and being depleted in PLAIPA compared to SLAIP. This liquid aqueous stream SLAIP is then passed as a wastewater stream WIM(4) to electro-oxidation OE according to(b). The liquid organic stream SLAIPO can be used elsewhere as described herein.As far as the liquid stream SLOI is concerned, it is preferred to subject it to an aqueous treatment TA2 with a liquid aqueous medium L2, obtaining a liquid stream SL2 comprising an aqueous phase PSL2A and an organic phase PSL2O, and to subjecting the stream SL2 to a phase separation DPS3, obtaining a liquid aqueous stream SLA2, comprising240460W00129PSL2A and being depleted in PSL2O compared to SL2, and further obtaining a liquid organic stream SLO2 comprising PSL2O and being depleted in PSL2A compared to SL2. The liquid organic stream SLO2 can be used elsewhere as described herein. As far as the liquid aqueous stream SLA2 is concerned, it is possible to pass it as a wastewater stream WIM(5) to electro-oxidation OE according to (b). This is a preferred possibility according to the present invention. Further according to the present invention, it is possible to subject the liquid aqueous stream SLA2 to an aqueous treatment TA3 with a liquid aqueous medium L3, thereby adjusting the pH of SLA2 and obtaining a liquid stream SLA2P as a pH-adjusted stream SLA2. It is noted that according to the present invention, it is also possible to pass a part of the stream SLA2 to electro-oxidation OE according to (b) and to subject another part of the stream SLA2 to the aqueous treatment TA2. Regarding the liquid stream SLA2P, it is possible to pass it as a wastewater stream WIM(6) to electro-oxidation according to (b) . Further according to the present invention, it is possible to subject the liquid aqueous stream SLAIP in case it comprises an aqueous phase PLA2PA and an organic phase PLA2PO to a phase separation DPS4, obtaining a liquid aqueous stream SLA2PA comprising PLA2PA and being depleted in PLA2PO compared to SLA2P, and further obtaining a liquid organic stream SLA2PO comprising PLA2PO and being depleted in PLA2PA compared to SLA2P. This liquid aqueous stream SLA2P is then passed as a wastewater stream WIM(7) to electrooxidation OE according to (b). This is also preferred according to the present invention.Summarized, according to the present invention, at least one of the streams WIM(I) described above is subjected to electro-oxidation OE according to (b). Preferably, at least one of the streams WIM(1 ), WIM(2), WIM(5), and WIM( ) is subjected to electro-oxidation OE according to (b), wherein it may be more preferred that at least two, or at least three, or all of the streams WIM(1 ), WIM(2), WIM(5), and WIM( ) are subjected to electro-oxidation OE according to (b). If two or more streams WIM(I) are subjected to electro-oxidation OE according to (b), it is possible according to the present invention that every stream WIM(I) is passed to an individual and suitably configured electro-oxidation unit UOEG) for electro-oxidation as shown in Fig. 3, by way of example for the streams WIM(1 ), WIM(2), WIM(5), and WIM( ). It is further possible that all streams WIM(I) are suitably combined and passed, as combined stream, to one single electro-oxidation unit UOE(1 ) as shown in Fig. 2, by way of example for the streams WIM(1 ), WIM(2), WIM(5), and WIM( ). It is further possible to combine two or more streams WIM(I) and pass the combined stream to a suitably configured electro-oxidation unit UOEO), and pass at least one further stream WIM(I) and / or at least one further combined stream to at least one further suitably configured electro-oxidation unit UOEO); conceivable configurations are shown in Fig. 4, by way of example for the streams WIM(1 ), WIM(2), WIM(5), and WIM( ). From every electrooxidation unit UOEO), a respectively purified wastewater stream Wpu(j) is obtained.ExamplesReference Example 1 : Determination of the pHThe pH value was measured in the agitated dispersion with a pH sensor which measured 25 pH values in the range from 0 to 14 in a temperature range from 0 to 80 °C having a KCI240460W00130(potassium chloride) filling, available under product no. 6.0234.100, by DeutscheMETROHM GmbH & Co. KG, 70794 Filderstadt, Germany.Reference Example 2: Determination of the TOCFor determining the total carbon (TC) content, a given sample (1 to 10 mg) was combusted in a helium / oxygen atmosphere. After separation of the combustion gases, carbon was determined as CO2. The detection and quantification was done via thermal conductivity. As analyser, Elementar, model Vario EL Cube was employed.For determining the total inorganic carbon (TIC) content, a given sample (10 to 100 mg) was weighed into a stirred glass vessel and about 7 ml of 25 weight-% phosphoric acid were added. The mixture was heated to about 70 °C. A carrier gas stream of 200 ml N2 / min transported the formed carbon dioxide through several gas-washing bottles and finally for quantitation to the IR cell.The total organic carbon (TOC) content was then calculated as the difference between the TC and the TIC, TC - TIC.Example 1 : PyrolysisA mixed plastic waste material was provided. This material had a composition according to Tables 1 A and 1 B below:Table 1AMixed (municipal) solid plastic waste material (MMSPW)240460W00131Table 1BElemental analysis of MMSPW, dry basisThis mixed plastic waste solid material, in the form of a granulate, was pyrolyzed as material Ms in a pyrolysis reactor (continuous screw type reactor with approx. 1 m heated reaction zone) at a wall temperature of 500 °C and at a pressure of 1 .1 bar(abs) under atmosphere free of oxygen. 1 .8 kg / h of Ms were fed continuously into the reactor, leading to an average residence time of the solid I intermediate molten phase in the reactor of 15 minutes. The gaseous reactor effluent was released to atmospheric pressure and subsequently condensed. Upon condensation of the gaseous reactor effluent in two sequential condensers (the first condenser surface heated to 80 °C and the second condenser surface maintained at approximately 20 °C), a total mass fraction of 60.3 weight-% based on the amount of starting material Ms was obtained as liquid stream SSL combined from both condensers, and an off-gas stream SOFF remaining which was subsequently washed with water according to aqueous treatment TAO. The stream SSL comprised an aqueous phase PSLA and an organic phase PSLO (oil).Example 2: Electro-oxidation (1)In a batch cell 80 mL of wastewater WIM(1) , i.e. stream SLOFF from aqueous treatment TAO, a homogeneous orange coloured solution, were electrolyzed at 100 mA / cm2and 40 °C for 5 h using BDD electrodes both as anode and cathode with a surface area of 10 cm2. After 5 h, the solution was completely discoloured, and the TOC was reduced from 1300 to 85 weight-ppm.Example 3: Electro-oxidation (2)In a batch cell 80 mL of wastewater WIM(2), i.e. stream SLAI from the phase separation DRSI, a black and mostly homogeneous solution, were electrolyzed at 100 mA / cm2at 40 °C for 5 h using BDD electrodes both as anode and cathode with a surface area of 10 cm2. After 5 h, the solution was still black and the TOC was reduced from 6.3 to 5.9 weight-%.Example 4: Electro-oxidation (3)240460W00132In a batch cell 80 mL of wastewater WIM(5), i.e. stream SLA2 obtained from neutralization according to aqueous treatment TA2, an inhomogeneous black solution, were electrolyzed at 100 mA / cm2at 70 °C for 5 h using BDD electrodes both as anode and cathode with a surface area of 10 cm2. After 5 h the solution was homogeneous and the TOC was reduced from 7 to 3.7 weight-%.Example 5: Electro-oxidation (4)In a batch cell 80 mL of wastewater WIM(7), i.e. stream SLA2PA obtained from acidification according to aqueous treatment TA3 and subsequent phase separation DPS4, an inhomogeneous slightly coloured solution, were electrolyzed at 100 mA / cm2for 5 h using BDD electrodes both as anode and cathode with a surface area of 10 cm2. After 5 h the solution was homogeneous but brown and the TOC was reduced from 1 .2 to 0.6 weight-%. After 20 h of electrolysis the solution was completely discoloured and the TOC further reduced to 14 weight-ppm.Cited LiteratureWO 2021 / 224287 A1WO 2023 / 073059 A1US 11,248,177 B2J. Chem. Technol. Biotechnol. 2009, 84, 1747-1755US 2018 / 0099881 A1US 2020 / 0010341 A1WO 2019 / 014467 A1WO 2020 / 53063 A1Christopher Kick et al., "Aqueous phase of thermo-catalytic reforming of sewage sludge - quantity, quality, and its electrooxidative treatment by a boron-doped diamond electrode”, Separation and Purification Technology, Elsevier Science, Amsterdam, NL, vol. 286, January 1, 2022 US 2019 / 177186 A1CN 113717 784 A

Claims

1. 240460W00133Claims1 . A wastewater purification process, comprising(a) providing at least one wastewater stream WIMO) comprising organic material and exhibiting a TOC content CIMO), wherein the at least one wastewater stream WIMO) is obtainable or obtained by working up at least one stream resulting from a thermal decomposition P of a solid organic material Ms;(b) subjecting at least one of the wastewater streams WIM(I) to electro-oxidation OE in at least one electrolysis cell comprising a boron-doped diamond (BDD) anode and a cathode, obtaining from the at least one wastewater stream WIM(I) at least one purified wastewater stream Wpu(j) exhibiting a TOC content Cpu(j) with cpu(j) < i).

2. The process of claim 1, wherein the thermal decomposition P comprises, preferably is a pyrolysis P.

3. The process of claim 1 or 2, wherein the BDD anode according to (b) exhibits a BDD coating supported on a support material, the support material preferably being one or more of Nb, Ta, Si, graphite, an electrically conductive ceramic, wherein the support preferably comprises Nb; wherein the BDD coating preferably exhibits one or more of a thickness in the range of from 5 to 50 pm, preferably in the range of from 5 to 30 pm, more preferably in the range of from 5 to 15 pm; a boron doping in the range of from 0.01 to 3 weight-%, preferably in the range of from 0.05 to 1 .5 weight-%, more preferably in the range of from 0.1 to 0.5 weight-%, based on the total weight of the BDD coating;4. The process of any one of claims 1 to 3, wherein in the electrolysis cell according to (b), the gap between the anode and the cathode is in the range of from 0.5 to 10 mm, preferably in the range of from 1 to 5 mm; and wherein the electro-oxidation according to (b) is preferably carried out at one or more of a temperature of the wastewater in the electrolysis cell in the range of from 0 to 85 °C, preferably in the range of from 10 to 80 °C, more preferably in the range of from 20 to 75 °C; a specific energy value in the range of from 0.1 to 5 MWh / m3; a current density in the range of from 5 to 250 mA / cm2, preferably in the range of from 10 to 150 mA / cm2, more preferably in the range of from 50 to 100 mA / cm2.

5. The process of any one of claims 1 to 4, wherein the solid material Ms according to (a) comprises or consists of a waste material, preferably one or more of a plastic waste material and a textile waste material, more preferably a plastic waste material, more preferably a mixed plastic waste material; wherein the solid material Ms according to (a) preferably comprises one or more polymers, more preferably one or more of a polyamide (PA) including polyamide 6 and PA66; a polyisocyanate polyaddition product,240460W00134 preferably one or more of a polyurethane (PU), a thermoplastic polyurethane (TPU), a polyurea and a polyisocyanurate (PIR); a low-density polyethylene (LDPE); a high-density polyethylene (HDPE); a polyethylene (PE); a polypropylene (PP); a polyvinyl chloride (PVC); a polyvinyl acetate (PVA); a polystyrene (PS); a poly acrylonitrile butadiene styrene (ABS); a polystyreneacrylonitrile (SAN); a polyacrylate styrene acrylonitrile (ASA); a polytetrafluoroethylene (PTFE); a poly (methyl acrylate) (PMA); a poly (methyl methacrylate) (PMMA); a polybutadiene (BR, PBD); a poly(cis-1 ,4-isoprene); a poly(trans-1 ,4-isoprene); a polyoxy-methylene (POM); a polyethylene terephthalate (PET); a polybutylene terephthalate (PBT); a polybutylene adipate co-terephthalate (PBAT); a polyester (PES); a polyether sulfone (PESU); a polyhydroxyalkanoate (PHA); a poly-3-hydroxybutyrate (P3HB); a poly-4-hydroxybutyrate (P4HB); a polyhydroxyvalerate (PHV); a polyhydroxyhexanoate (PHH); a polyhydroxyoctanoate (PHO); a polylactic acid (PLA); a polysulfone (PSU); a polyphenylene sulfone (PPSU); a polycarbonate (PC); a polyether ether ketone (PEEK); a poly(p-phenylene oxide) (PPO); a poly(p-phenylene ether) (PPE); and a copolymer of two or more thereof, more preferably one or more of a polyolefin, a polyester, a polycarbonate, a polyurethane and a polyamide other than polyamide 6.

6. The process of any one of claims 1 to 5, wherein providing the at least one wastewater stream WIM(I) according to (a) comprises(a.1 ) providing the solid material Ms;(a.2) subjecting the solid material Ms provided according to (a.1 ) to a pyrolysis P, obtaining an intermediate gas stream SGI;(a.3) subjecting SGI obtained according to (a.2) to a condensation C, obtaining a solids-containing liquid stream SSL comprising an aqueous phase PSLA and an organic phase PSLO, and further obtaining an off-gas stream SOFF;(a.4) subjecting the stream SSL obtained according to (a.3) to a solid-liquid separation DSL, obtaining a liquid stream SLI comprising PSLA and PSLO and being depleted in solids compared to MSL, and further obtaining a solids residue Rs;(a.5) subjecting the stream SLI to a phase separation DRSI, obtaining a liquid aqueous stream SLAI comprising PSLA and being depleted PSLO compared to SLI, and further obtaining a liquid organic stream SLOI comprising PSLO and being depleted in PSLA compared to SLI.

7. The process of claim 6, further comprising subjecting the off-gas stream SOFF obtained according to (a.3) to an aqueous treatment TAO with a liquid aqueous medium Lo, obtaining a liquid aqueous stream SLOFF; wherein the liquid aqueous stream SLOFF exhibits a pH preferably of at least 8, more preferably in the range of from 8 to 13, more preferably in the range of from 9 to 12, the pH being determined as described in Reference Example 1; wherein the liquid aqueous stream SLOFF is preferably subjected as a wastewater stream WIM(1 ) to electrooxidation according to (b).240460W001358. The process of claim 6 or 7, wherein the liquid aqueous stream SLAI obtained according to (a.5) is subjected as a wastewater stream WIM(2) to electro-oxidation according to (b).

9. The process of any one of claims 6 to 8, wherein, prior to being subjected to electro-oxidation according to (b), the liquid aqueous stream SLAI obtained according to (a.5) is subjected to an aqueous treatment TAI with a liquid aqueous medium Li , thereby adjusting the pH of SLAI and obtaining a liquid stream SLAIP as pH-adjusted stream SLAI, or wherein the liquid aqueous stream SLAIP comprises an aqueous phase PLAIPA and an organic phase PLAIPO.

10. The process of any one of claims 6 to 9, further comprising(a.6) subjecting the stream SLOI obtained according to (a.5) to an aqueous treatment TA2 with a liquid aqueous medium l_2, obtaining a liquid stream SL2 comprising an aqueous phase PSL2A and an organic phase PSL2O, and subjecting the stream SL2 to a phase separation DPS3, obtaining a liquid aqueous stream SLA2, comprising PSL2A and being depleted in PSL2O compared to SL2, and further obtaining a liquid organic stream SLO2 comprising PSL2O and being depleted in PSL2A compared to SL2; wherein the liquid aqueous stream SLA2 obtained according to (a.6) exhibits a pH preferably of at least 8, more preferably in the range of from 8 to 13, more preferably in the range of from 9 to 12, the pH being determined as described in Reference Example 1, and wherein the liquid aqueous stream SLA2 obtained according to (a.6) is preferably subjected as a wastewater stream WIM(5) to electro-oxidation according to (b).11 . The process of any one of claims 6 to 10, wherein, prior to being subjected to electro-oxidation according to (b), the liquid aqueous stream SLA2 obtained according to (a.6) is subjected to an aqueous treatment TA3 with a liquid aqueous medium L3, thereby adjusting the pH of SLA2 and obtaining a liquid stream SLA2P as pH- adjusted stream SLA2, wherein the liquid aqueous stream SLA2P to be subjected to electro-oxidation according to (b) exhibits a pH preferably of at most 6.5, more preferably in the range of from 1 to 6.5, more preferably in the range of from 2 to 5, the pH being determined as described in Reference Example 1 , and wherein the liquid aqueous stream SLA2P is preferably subjected as a wastewater stream WIM(6) to electro-oxidation according to (b); wherein the liquid aqueous stream SLA2P more preferably comprises an aqueous phase PLA2PA and an organic phase PLA2PO, the process preferably further comprising subjecting the stream SLA2P to a phase separation DPS4, obtaining a liquid aqueous stream SLA2PA comprising PLA2PA and being depleted in PLA2PO compared to SLA2P, and further obtaining a liquid organic stream SLA2PO comprising PLA2PO and being depleted in PLA2PA compared to SLA2P, wherein the liquid aqueous stream SLA2PA is preferably subjected as a wastewater stream WIM(7) to electro-oxidation according to (b).

12. The process of claim 10 or 11 , further comprising240460W00136(a.7) subjecting at least a part of SLOI obtained according to (a.5) or at least a part of SLO2 obtained according to (a.6) to a distillation Di, obtaining a gaseous top stream comprising a gaseous aqueous stream SGD, and further obtaining a liquid organic bottom stream SLD being depleted in water compared to SLOI.

13. The process of any one of claims 1 to 12, wherein independent from each other, a wastewater stream WIM(I) provided according to (a) and subjected to (b) exhibits a TOC content in the range of from 100 weight-ppm to 20 weight-%, preferably in the range of from 0.5 to 15 weight-%, more preferably in the range of from 1 to 7 weight-%, based on the total weight of WIM, the TOC content being determined as described in Reference Example 2; wherein, if from every wastestream WIMO), a purified wastestream WRUO) with i = j is obtained, preferably CRUO) < 0.9 CIMO), more preferably Cpu(j) 0.8 CIMO), more preferably Cpu(j) 0.7 CIMO), more preferably Cpu(j) 0.6CIMO), more preferably Cpu(j) 0.5 CIMO), more preferably Cpu(j) 0.4 CIMO), more preferably Cpu(j) 0.3 CIMO), more preferably Cpu(j) 0.2 CIMO), more preferably Cpu(j) 0.1 CIMO).

14. The process of any one of claims 1 to 13, wherein from the electro-oxidation OE according to (b), CO2 and H2 are obtained.

15. A process, preferably according to any one of claims 1 to 14, comprising the step of converting at least a part of the CO2 as defined in claim 14 and / or at least a part of the H2 as defined in claim 14 and / or at least a part of the solids residue Rs as defined in claim 6 and / or at least a part of the liquid organic stream SLOI as defined in claim 6 and / or at least a part of the liquid organic stream SLAIPO as defined in claim 9 and / or at least a part of the liquid organic stream SLO2 as defined in claim 10 and / or at least a part of the liquid organic stream SLA2PO as defined in claim 11 and / or a chemical material obtainable or obtained by the process according to any one of claims 1 to 14 to obtain a product Q.

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