77 results about "Digestate" patented technology

A method for recycling lithium batteries containing the steps: (a) digesting comminuted material (10), which contains comminuted components of electrodes of lithium batteries, using concentrated sulphuric acid (12) at a digestion temperature (TA) of at least 100° C., in particular at least 140° C., so that waste gas (14) and a digestion material (16) are produced, (b) discharging the waste gas (14) and (c) wet chemical extraction of at least one metallic component of the digestion material (16).

The invention relates to a device for extracting ammonium ions (8) from a digestate resulting from a treatment of an enrichment liquid made of biodegradable material and comprising: - a bio-electrochemical treatment unit (12) receiving a first volume of digestate and a second volume of enrichment liquid, - a unit (40) for acquiring a value of at least one parameter representative of a value of at least one quality parameter of the digestate, and of a value of at least one quality parameter of the enrichment liquid, - a unit (44) for determining a value of a ratio of a mixture representative of an amount of biodegradable organic material relative to an amount of ammonium ions, - a unit (48) for determining a mixing ratio of the digestate and of the enrichment liquid depending on the value of the ratio characteristic of a mixture, - a control unit (52) configured to obtain it.

The invention belongs to the technical field of sewage treatment, and particularly relates to a lateral flow anaerobic ammonia oxidation effluent deep nitrogen and phosphorus resource recycling method which comprises the following steps: mixing treated anaerobic sludge digestion liquid and untreated anaerobic sludge digestion liquid in an intermediate water tank to form mixed inlet water; adding a magnesium source into the mixed inlet water in the middle water tank to form a middle mixed solution; transferring the intermediate mixed solution into a short-cut denitrification-anaerobic ammonia oxidation coupled struvite reactor, adjusting the pH value of the intermediate mixed solution, and adding a carbon source into the pH-adjusted intermediate mixed solution to form a reaction solution; and carrying out solid-liquid separation on a product obtained after the reaction of the reaction liquid, and discharging the separated liquid or systematically recycling the separated liquid. According to the invention, deep nitrogen removal and phosphorus resource recovery under the condition of low carbon source can be realized, and a new way is provided for subsequent deep treatment of a short-cut nitrification-anaerobic ammonia oxidation process.

Processes, systems and equipment are for treating a digestate resulting from the thin stillage of a bioethanol plant. They can include a decarbonizer system to reduce the carbon and water footprint in an ethanol plant and associated biogas plant by treating a digestate stream resulting from a thin stillage digester. The treatment includes heating the digestate stream to decompose ammonia bicarbonate contained in the digestate stream into ammonium and bicarbonate; and contacting the heated digestate stream with air so that a first portion of the ammonia is desorbed from the heated stream to mix with the air.

A method of treating wastewater from a renewable fuel production comprises anaerobically digesting the wastewater to produce digestate and sludge, aerobically treating the digestate to produce an effluent and a second sludge, separating the effluent into a first filtrate and a first reject, treating the sludge, second sludge, and first reject in a solids-liquid separation apparatus to produce recovered water, directing the recovered water into the mixing tank, filtering the first filtrate in a nanofiltration unit to produce a second filtrate and a second reject, filtering the second filtrate in a first reverse osmosis unit to produce a third filtrate and a third reject, filtering the third reject in a second reverse osmosis unit to produce a fourth filtrate and a fourth reject, combining the third filtrate and fourth filtrate to form a product water, and combining the second reject and the fourth reject into a combined reject for disposal.

The present invention concerns a composition for a horticultural pot comprising a solid residue of digestate from methanization and / or a solid residue from composting and a biodegradable polymer chosen from polyhydroxyalkanoates (PHA), its preparation and its use in the manufacture of such a pot.

The invention relates to a method for treating an organic effluent comprising a solid fraction and a liquid fraction, the method comprising the following steps: - digesting the organic effluent in a main anaerobic digester (6) at a temperature of between 5°C and 35°C to produce biogas, a main effluent and a main digestate; - degassing the main effluent in a main degassing module (10) to extract biogas present in dissolved form in the main effluent and produce a degassed main effluent; - biologically treating the degassed main effluent in a biological treatment unit (12) to produce a biological sludge; and - digesting the biological sludge in a secondary anaerobic digester (26) at a temperature of between 20°C and 65°C to produce biogas, a secondary effluent and a secondary digestate.

TITLE. Device for treating products from the anaerobic digestion of organic waste by dry or semi-dry process. The invention relates to a device for treating (1) products from the anaerobic digestion of organic waste by dry or semi-dry process. This treatment device (1) comprises, on the one hand, means for introducing (4) a wet digestate, resulting from the digestion of organic waste and containing liquid, into the treatment device (1), on the other hand, means for extracting (5) at least a portion of the liquid contained in the wet digestate, in order to obtain a dry digestate, on the other hand, means for transferring (6) a digestion gas resulting from the digestion of organic waste, and on the other hand, means for removing the dry digestate from the treatment device (1).This device (1) is characterized in that it comprises a pump (8), while the means for introducing (4) the wet digestate, the means for extracting (5) the liquid, the means for transferring (6) the digestate gas, and the means for evacuating (7) the dry digestate comprise at least a portion of said pump (8). Figure for the abbreviation: Fig. 1.

The method of the invention comprises the production of highly digestible hydrolysed keratinaceous material comprising the steps of (i) partly hydrolysing keratinaceous material with heat and pressure and (ii) optionally drying the resultant partly hydrolysed material comprising at least partly insoluble material and (iii) subjecting the optionally dried partly hydrolysed keratinaceous material to a chemical hydrolysis step with acid or base to obtain a highly digestible hydrolysed material, and (iv) purifying the highly digestible material. The invention further provides highly digestible keratinaceous material with an amino acid composition reflecting the amino acid composition of the raw material, wherein the amount of de-carboxylated amino acids is less than 500 ppm. Preferably all of the highly digestible material has a molecular weight lower than 10000 dalton, and preferably more than 95 wt % of the highly digestible keratinaceous material has a molecular weight of less than 5000 dalton.

A biogas slurry filtering system comprising a first tank configured to receive the biogas slurry to be filtered and a mixing device located in the first tank and configured to aerate the biogas slurry. The filtering system also comprising a filter configured to filter the biogas slurry into digestate and filtrate and a controller that controls operation of the filtering system. The filter comprising a filter head located in the first tank at a height-adjustable position. <Figure 1>

The application discloses a marine-source collagen fiber hemostatic sponge and a preparation method thereof, and belongs to the field of biomedical materials. The preparation method is as follows: a true sea moss is cut open, a bag is removed, internal tissues are taken out, and digests, excrements and the like are removed after washing; the internal tissues are cut into pieces and then added into a NaCl solution, and are placed at 0-4 DEG C for 6-18 hours; urea solution is added after filtration and cleaning; a high-speed homogenizer is used for primary stirring to obtain a collagen-urea blend solution, and the solution is frozen and then thawed at 4 DEG C for 5-15 minutes; a high-speed homogenizer is used for secondary stirring; and finally, a vacuum filter press is used for solid-liquid separation of the solution to obtain collagen fibers; the collagen fibers are dispersed in water, and freeze-drying is carried out to obtain the collagen fiber hemostatic sponge. The application provides a porous hemostatic sponge with a capillary rapid liquid absorption capacity, which has the advantages of rapid preparation, low economic cost, ecological friendliness in a whole life cycle, strong liquid absorption, good hemostatic effect and low hemolysis rate.

The present invention discloses a method for promoting the anaerobic digestion process of sludge by coupling treatment of oxygen and corn straw biogas residue biochar, belonging to the technical field of solid waste resource treatment. The present invention discloses a method for promoting the anaerobic digestion process of sludge by coupling treatment of oxygen and biogas residue biochar. The method increases the anaerobic hydrolysis and acidification rate of sludge by injecting a trace amount of oxygen, and at the same time utilizes the oxygen-containing functional groups on the surface of biogas residue biochar as a bridge to accelerate the electron transfer between volatile fatty acid oxidizing bacteria and methanogenic archaea, promote the degradation of volatile fatty acids, increase the maximum methane production potential, promote the maximum methane production rate and increase the cumulative methane production, which is conducive to further improving the economic and environmental benefits of anaerobic digestion technology.

A plant and a method for treating organic waste are provided. The plant and method provide an integrated system for waste treatment which allows optimization of the re-use of treated organic waste, by recovering and exploiting all the components of the incoming waste. After a series of pretreatment operations intended to separate the organic fraction from ferrous, plastic and inert materials, the treated waste is subjected at first to an anaerobic treatment with production of biogas and digestate, and the digestate is then subjected to an aerobic treatment with production of compost. Advantageously, the plant and method provide that handling of the waste to be treated takes place in an automated manner, thus reducing personnel exposure to bad odors and contaminants.

The dried animal digest composition may include dried animal digest particles having an animal fat content of about 16% by weight or less and a moisture content of about 3% by weight or less. In this embodiment, the dried animal digest particles have a volumetric particle size distribution with a D10 of about 20 μm to about 50 μm, a D50 of about 60 μm to about 150 μm, and a D90 of about 160 μm to about 275 μm. Furthermore, the dried animal digest composition is substantially free of a silicon dioxide flow aid.

The present invention relates to the technical aspects of digestate treatment, resulting from the methanation process, in general, and more particularly to its conditioning prior to recovery or disposal through appropriate channels. The drying composition of the invention allows for easy transport, mixing, storage, and handling. This drying composition comprises: - at least 50% and up to 99% by weight of a superabsorbent polymer - and from 1% to 50% by weight of a flocculating polymer. The invention relates to the use of this composition for conditioning digestate while reducing the volatilization of ammonia nitrogen once the digestate has been absorbed by the composition.

The invention discloses a method for extracting fish oil from viscera of freshwater fish, which comprises the following steps: removing gall bladder, swim bladder and intestinal digests in the viscera of freshwater fish, cleaning, draining, and crushing to obtain viscera paste; putting the minced viscera into deionized water, carrying out microwave treatment, then adjusting the pH value to 6.5-7.5, and then adding neutral protease and an antioxidant to carry out enzymolysis reaction, so as to obtain an enzymolysis mixture; and performing centrifugal layering on the enzymolysis mixture, collecting a fish oil layer, and performing distillation purification to obtain the fish oil. According to the extraction method disclosed by the invention, a microwave-assisted enzymolysis technology is adopted to accelerate a reaction process, an oil-soluble natural antioxidant in-situ antioxidant technology is combined to inhibit fat oxidation, and the fish oil is purified by a molecular distillation technology, so that the product quality is improved; the technology can improve the fish oil extraction efficiency, reduce the production cost, reduce the environmental pollution, and ensure the high quality and high purity of the fish oil.

An anaerobic digester including an active heat pump system. The active heat pump system is arranged to absorb thermal energy from effluent of the digester and return at least a portion of that thermal energy to one or more of the influent, the digestate recirculation, and fluid within the tank. In an embodiment, the active heat pump system includes a heat pump for the influent and / or the recirculating digestate. In another embodiment, the active heat pump system includes an exchanger within the digester tank to transfer thermal energy to the fluid within the tank. Each heat pump is configured to absorb thermal energy of the effluent and to transfer thermal energy to the influent, the digestate, and / or the fluid within the digester. The active heat pump system may include the influent heat pump, the recirculating digestate heat pump and / or the tank fluid heat pump.

The present invention is intended to lower the FOS / TAC ratio of the material to be stripped, thereby enabling a higher pH of the material, and to enhance the stripping conditions of the material in an ammonia recovery unit (4) of a biogas plant having at least one ammonification reactor (1) for processing an input raw feedstock into a pretreated feedstock, and at least one biogas reactor (2) for fermenting the pretreated feedstock into biogas and a fermentation digestate, the fermentation digestate being separated into a solid fraction and a liquid fraction in a fermentation digestate separator (5). At least a portion of the separated liquid fraction is directed as a return liquid having a low FOS / TAC ratio via a return liquid conduit (10) to a pretreated feedstock blending device (12) where the return liquid is mixed with a pretreated feedstock having a higher FOS / TAC ratio, and / or to a liquid blending device (13) where the return liquid is mixed with a separated liquid from the pretreated feedstock, and this mixed material having an intermediate FOS / TAC ratio is then fed to the ammonia recovery unit (4).

This process for treating an organic effluent comprising a solid fraction and a liquid fraction involves the following steps: - digestion of the organic effluent in a primary anaerobic digester (6) at a temperature between 5°C and 35°C to produce biogas, a primary effluent, and a primary digestate; - degassing of the primary effluent in a primary degassing module (10) to extract biogas present in dissolved form in the primary effluent and produce a degassed primary effluent; - biological treatment of the degassed primary effluent in a biological treatment unit (12) to produce a biological sludge; and - digestion of the biological sludge in a secondary anaerobic digester (26) at a temperature between 20°C and 65°C to produce biogas, a secondary effluent, and a secondary digestate. Figure for the abstract: Figure 1

The application discloses a kind of closed field leachate and kitchen garbage combined anaerobic digestion device and method, device includes sequentially and side by side and is connected and is arranged pretreatment bin, preliminary mixing bin and anaerobic digestion bin, preliminary mixing bin middle part is equipped with a for receiving the mixed component of solid kitchen garbage on the filter plate.S1, kitchen garbage pretreatment;S2, kitchen garbage humification treatment;S3, combined anaerobic digestion treatment;S4, gas collection.The application is by closed field leachate as inoculum, kitchen garbage is digestion material, carries out sequential batch combined anaerobic digestion treatment, so that closed field leachate has good inoculation function, under the condition that no any inoculum is added, combined anaerobic digestion system can quickly enter gas production peak period finally by kitchen garbage conversion formed humus is substantially completely degraded.

The application provides a kind of anaerobic digestion residue dewatering performance rapid detection method, belong to the technical field of biomass waste dewatering performance detection.Specifically: collect anaerobic digestion in 400-4000cm ‑1 Wavelength range of full-band infrared spectrum data;Using infrared spectrum analysis software to obtain the infrared spectrum data is smoothed;According to the data obtained, select 1550-1750cm ‑1 Wavelength range of infrared water spectrum data related to O-H bending vibration, Gaussian deconvolution and peak fitting are carried out using peak fitting software, and are decomposed into six sub-peaks, p1-p6;And calculate the area ratio of each sub-peak, and the ratio of the area ratio of sub-peak 1-2 and sub-peak 3-6 is represented by the sum of the area ratio of sub-peak 1-2 and sub-peak 3-6, and the value is higher, which means it is more difficult to dewater.The infrared detection method of the application has the advantages of clean, efficient, low dose, low cost, batch detection, etc.

The invention relates to an anaerobic ammonia oxidation coupled anaerobic digestion system with biological denitrification cooperating with biogas purification and a use method thereof. The system comprises an anaerobic digestion tank, a carbon dioxide absorption device and a PN / A unit, the PN / A unit comprises an anaerobic ammonia oxidation reactor and a sequencing batch reactor; the anaerobic digestion tank is used for providing an anaerobic digestion environment for organic solid waste or organic wastewater, a biogas outlet of the anaerobic digestion tank is connected with the carbon dioxide absorption device, and a digestion liquid outlet of the anaerobic digestion tank is connected with a water inlet of the sequencing batch reactor; the carbon dioxide absorption device is used for absorbing carbon dioxide in gas discharged from the biogas outlet through water so as to purify the biogas; the water outlet of the sequencing batch reactor is connected with the water inlet of the anaerobic ammonia oxidation reactor, the water outlet of the anaerobic ammonia oxidation reactor is connected with the carbon dioxide absorption device, and the liquid outlet of the carbon dioxide absorption device is connected with the water inlet of the anaerobic ammonia oxidation reactor to form a liquid circulation loop. According to the invention, integration of biogas purification, denitrification, sulfur removal and pH self-regulation is realized.

Process for producing biogas from a digestate obtained from a digester, said process comprising a step of recovering the digestate at the outlet of a digester, a post-digester or a storage tank; a step of separating the digestate into a solid digestate and a liquid digestate; a step of introducing the solid digestate into at least one closed tank; a step of anaerobic digestion in the tank with neither heating nor mixing; and a step of recovering the biogas at the tank outlet.

The invention relates to a method for anaerobic digestion of an effluent and reduction of its nitrogen load, the method comprising: - a step (102) of anaerobic digestion of the effluent in a digester (4), producing a digestate and ammonia nitrogen; - a step (106) of degrading ammonium ions originating from the digester in a bioreactor (24) for degrading ammonium ions, characterised in that the method comprises a step (104) of extracting the ammonia nitrogen formed during the anaerobic digestion step (102), during which a stream exiting the anaerobic digester is subjected to evaporation and condensation in order to produce an aqueous solution enriched in ammonium ions, and in that at least part of the aqueous solution enriched in ammonium ions is sent to the bioreactor (24) in order to supply at least some of the ammonium ions to be degraded.

This invention discloses a technical method for alleviating ammonia inhibition during the high-temperature aerobic digestion process of organic solid waste. The method involves reacting fulvic acid with a mixture mainly containing Cu... 2+ Mn 2+ Fe 2+ The enzyme-catalyzed solutions of ions were mixed to prepare a conditioning mother liquor, which was then added to the high-temperature aerobic digestion system for organic solid waste in a specific ratio. The total ammonia nitrogen concentration in the digestate was monitored, and when it rose to 800 mg / L... ‑1 In this process, soluble magnesium salts and phosphogypsum slurry are sequentially added to the treatment system of wet organic solid waste. Heavy magnesium oxide is intermittently added to adjust the pH of the digestion system to 8.0-9.0, and high-temperature aerobic digestion is continued. Then, a silicate nitrogen-fixing agent is added to the digestion system. This invention combines the principles of enhancing oxidase activity with ammonia nitrogen precipitation, adsorption, and ion exchange to alleviate ammonia inhibition during the high-temperature aerobic digestion of wet organic solid waste through multiple pathways. After stabilization treatment, the solid residue obtained from solid-liquid separation has a high degree of humification and nitrogen content, making it suitable for subsequent substrate utilization.

The invention relates to an anaerobic digestion plant comprising a digester for transforming biomass into biogas and into a digestate comprising solid matter and seepage liquid, the digester comprising an outlet to the outside, the plant comprising a conveying system (44) for discharging digestate through the outlet, the conveying system comprising a drawer (200) having a bottom and side edges, and a scraper element configured to move back and forth in a direction of horizontal translation toward the outlet (40) between a filling position and an emptying position, the scraper element (204) comprising a nose (210) configured to push the digestate toward the outlet (40) via a first surface in a first direction of translation outward from the digester, and to slide under the digestate via a second surface in an inward direction of translation.

The present invention belongs to the technical field of solid waste treatment and provides a method for preparing hydrogen-rich low-carbon syngas by chemical looping gasification of high-moisture digestate. In the present invention, high-moisture digestate is mixed with an oxygen carrier to carry out a chemical looping gasification reaction to obtain hydrogen-rich low-carbon syngas. The moisture content of the high-moisture digestate is 30-50%. The oxygen carrier is a transition-metal-supported lanthanum oxide. In the present invention, a metal-composite-type water–carbon-capturing oxygen carrier material, i.e., the transition-metal-supported lanthanum oxide, is used to carry out chemical looping gasification conversion of high-moisture digestate, which improves the moisture tolerance of digestate chemical looping gasification, optimizes the quality of syngas, and increases the content of hydrogen and reduces the content of CO2 in the syngas.

To provide a hydrogen supply device for a methane gas fermentation tank capable of safely and easily eliminating clogging SOLUTION: In a biomethanation reaction for converting carbon dioxide (CO2) contained in a biogas into methane (CH4) by adding hydrogen into a digestive liquid of a methane fermentation tank, a hydrogen gas feeder 11 is inserted and arranged through an insertion part 7 provided in the methane fermentation tank 1. The hydrogen gas supply device includes a first tube part configured such that a distal end region thereof is positioned in the digestive juice W, and a second tube part disposed in the first tube part so as to be capable of being inserted into and pulled out from the first tube part and having a length capable of protruding from a distal end open region of the first tube part, and the second tube part has a hydrogen gas blowing region communicating with the inside of the tube in a protruding region protruding from the distal end open region of the first tube part.SELECTED DRAWING: Figure 2

[Problem] To detect abalone, which may cause an allergic reaction, with high sensitivity even when trace amounts of abalone is contained in a food raw material, a product or the like. [Solution] Provided is a method for detecting abalone, the method comprising a step for extracting a protein from a sample, and a step for allowing the extracted protein to react with a protease to produce an enzymatically digested product, and the method involving analyzing the enzymatically digested product, and detecting at least one peptide selected from the group consisting of SEQ ID NO:1 to SEQ ID NO:2 by using a mass spectrometer to qualitatively or quantitatively determine whether or not an abalone protein is present in the sample.

This invention provides a method for preparing nutrient solutions in hydroponics that improves the productivity of hydroponic systems using raw material digestate. [Solution] The method for preparing the nutrient solution for hydroponics is a method for preparing the nutrient solution 111 using digestate, characterized by mixing an alkaline agent 131 with the nutrient solution 111 supplied to plant A to adjust the pH of the nutrient solution 111 to 6.0 or higher and 6.9 or lower (generating a prepared nutrient solution 121). Alternatively, the method for preparing the nutrient solution for hydroponics may involve mixing a prepared digestate with the nutrient solution 111 supplied to plant A to adjust the pH of the nutrient solution 111 to 6.0 or higher and 6.3 or lower.