124 results about "Digestate" patented technology

A method for producing product gas (PG) comprising methane is disclosed, the method comprising the steps of providing a biomass (BM), subjecting the biomass (BM) to an anaerobic digestion to produce biogas (BG) and a biomass digestate (BMD), separating the biomass digestate (BMD) into a liquid digestate fraction (LDF) and a solid digestate fraction (SDF), and subjecting the liquid digestate fraction to microbial electrolysis cell (MEC) processing to produce methane and / or hydrogen gas. Also, a system for producing product gas (PG) comprising methane is disclosed.

A method of preparing a fertiliser composition, the method comprising the steps of: (i) providing a digestate material; (ii) contacting the digestate material with a composition comprising carbon dioxide; (iii) contacting the material obtained in step (ii) with a source of nitrate and / or sulfate; and (iv) admixing the material obtained in step (iii) with urea.

The present invention relates to a biomimetic process for the valorization of organic waste by methanization and purification of the liquid digestate and CO2 by algae cultivation. Figure for abstract: N / A

A process for stabilizing nutrients in anaerobic digestate involves removing hydrogen sulfide and ammonia from biogas. This process involves circulating the digestate in a column and contacting it with the biogas. Additional ammonium bisulfite, ammonia, and / or sulfur dioxide may be added to the contacting device to remove hydrogen sulfide from the biogas. The reactions will create ammonium bisulfite, ammonium sulfite, and ammonium thiosulfate to prevent ammonia and hydrogen sulfide emissions to allow for land application.

A method for preparing an adjustable organic fertilizer is provided. The method includes providing a ratio of nitrogen, phosphorus, and potassium required for a target crop and collecting a plurality of wastes. The method includes categorizing the fertilizer concentrations of the same type of feeding substrates within the wastes separately, and adjusting the composition of the categorized wastes to form a composite feeding substrate according to the ratio of nitrogen, phosphorus, and potassium required for the target crop. The method includes subjecting the composite feeding substrate to an anaerobic fermentation process. The anaerobic fermentation process includes introducing the composite feeding substrate into an acidification tank to obtain a first mixture and introducing the first mixture into a methanogenesis tank to obtain a second mixture. The method further includes separating the second mixture to obtain liquid digestate and solid digestate, wherein the solid digestate serves as an organic fertilizer.

The invention describes the coupling of an anaerobic biological system (110) with a bioelectrochemical system (120) in order to intensify the operation of the anaerobic system and recover the ammoniacal nitrogen contained in a digestate (3). The invention determines at least one operating parameter of an evaporation extraction system drawing off volatile organic matter from a liquid medium as a function of a value of a characteristic ratio of the mixture of this volatile organic matter with the digestate (3), this ratio being representative of an amount of biodegradable organic matter relative to an amount of ammonium ions. The value of this ratio is determined as a function (bi) of a target yield of ammonium ions extracted from the bioelectrochemical treatment system or of a target concentration of ammonium ions separated by this system, and (bii) of the value of at least one parameter representative of the capacity of the electrochemical treatment system to separate the ammonium ions and of at least one quality parameter of the digestate.

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 describes the coupling of a digester (110) with a bioelectrochemical system (120) in order to intensify the operation of the digester and recover the ammoniacal nitrogen contained in the digestate (3). The invention determines at least one operating parameter of the digester as a function of a value of a characteristic ratio of the digestate (3) or of the liquid fraction (3a) thereof, representative of an amount of biodegradable organic matter relative to an amount of ammonium ions. The value of this ratio is determined as a function (bi) of a target yield of ammonium ions extracted from the bioelectrochemical treatment system or of a target concentration of separated ammonium ions present in the bioelectrochemical treatment system, and (bii) of the value of at least one operating parameter of the bioelectrochemical treatment system representative of the capacity of the electrochemical treatment system to separate the ammonium ions and of the value of at least one quality parameter of the digestate or of the liquid fraction thereof.

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.

The invention describes the coupling of a digester (110) with a bioelectrochemical system (120) to intensify the operation of the digester and recover the ammoniacal nitrogen contained in the digestate (3). The invention determines at least one operating parameter of the digester as a function of a value of a ratio characteristic of the digestate (3) or its liquid fraction (3a), representative of a quantity of biodegradable organic matter relative to a quantity of ammonium ions.The value of this ratio is determined based on (bi) a target yield of ammonium ions extracted from the bioelectrochemical treatment system or a target concentration of separated ammonium ions present in the bioelectrochemical treatment system, and (bii) the value of at least one operating parameter of the bioelectrochemical treatment system representative of the electrochemical treatment system's capacity to separate ammonium ions, and the value of at least one quality parameter of the digestate or its liquid fraction. (Shorthand figure: Figure 1.)

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.

The present invention relates to a methanation plant in which the digestate outlet (40) comprises a solid matter outlet (42) and a seepage juice outlet (60) distinct from each other, the peripheral wall (14) of the digester (10) having at the seepage juice outlet (60) a masonry support (62) provided with an orifice (64) through which a tubular filter screen (66) is placed, the filter screen (66) being movable between a working position, in which the filter screen (66) closes the orifice (64) and is internal to the digester (10), and a cleaning position, in which the filter screen (66) is external to the digester (10) and accessible by a cleaning device (70) while closing the orifice (64) of the masonry support (62). The invention also relates to a continuous biomass methanization process using such a methanization plant (1). Figure 1 of the abstract: Figure 1

A method for determining (1) a mass proportion of an additive to be injected into an anaerobic digester, said additive being intended to promote at least one reaction of degradation of organic matter by microorganisms, said method comprising: - a step of acquiring (2) one or more samples of said digestate, each sample being enriched by a first concentration of a compound inhibiting anaerobic digestion and by a second concentration of another compound chosen from the products of acidogenesis; - an analysis step (3), during which, for each sample, a mass proportion of said additive is added, and a methane production kinetic is measured; - a step (4) of determining from said analyses (4) a relationship between the mass proportions of additive added and the methane production kinetics;- a step (5) of predicting a parameter representative of the maximum activity of microorganisms, and - a step (6) of determining the mass proportion of additive to be added to said input. Figure of the abstract: Figure 1;

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.

A system for preparing fertiliser, comprising: a dry matter concentrator 10 (e.g., fluid bed drier) configured to receive manure, slurry, digestate and / or sludge F and to increase the dry matter content thereof; and a scrubber system 20 configured to receive off gases A from dry matter concentrator, with the scrubber system configured to create a scrubbing liquor B from the off gases, and to mix the liquor with the manure, slurry, digestate and / or sludge. The scrubber system may remove ammonia from off-gases, and / or receive a reagent for chemically binding ammonia into the scrubbing liquor. The system may comprise a pressurisation unit to increase scrubbing liquor pressure, and / or flow regulation device to regulate scrubbing liquor flow. Also disclosed is a method for preparing fertiliser, comprising: receiving offgases from the dry matter concentrator; creating scrubbing liquor from off gases; and mixing the scrubbing liquor with manure, slurry, digestate or sludge. The system and methods aim to increase the nutrient content of fertiliser products.

The present disclosure relates generally to systems and methods for improving performance of anaerobic digestion by post-anaerobic digestion processing. The post-anaerobic digestion processing includes introducing a digestate to post-anaerobic digestion microorganisms downstream of an anaerobic digestion process, wherein the digestate is a product of anaerobic digestion and the post-anaerobic digestion microorganisms hydrolyze and ferment the digestate to produce hydrolysis and fermentation products. In some instances, the systems and methods further include introducing the hydrolysis and fermentation products to anaerobic digestion microorganisms, wherein the anaerobic digestion microorganisms convert the hydrolysis and fermentation products into biogas.

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 features general-purpose microbiological growth media capable of supporting growth of microorganisms on membranes. The media contain casein digest, soybean digest, animal tissue digest, yeast extract, dextrose, a phosphate buffer, hemin, and L-cystine. The invention features an all-purpose microbiological growth media that can support the growth of anaerobes, molds, injured spores, and general aerobic bacteria to a greater extent than other media.

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.

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 dosed 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.