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96 results about "Methanogenesis" patented technology

Methanogenesis or biomethanation is the formation of methane by microbes known as methanogens. Organisms capable of producing methane have been identified only from the domain Archaea, a group phylogenetically distinct from both eukaryotes and bacteria, although many live in close association with anaerobic bacteria. The production of methane is an important and widespread form of microbial metabolism. In anoxic environments, it is the final step in the decomposition of biomass. Methanogenesis is responsible for significant amounts of natural gas accumulations, the remainder being thermogenic.

Method for biologically removing toxicity inhibition and intensively degrading typical medical organic wastewater under salt stress

The invention provides a method for biologically removing toxicity inhibition and intensively degrading typical medical organic wastewater under salt stress, and belongs to the technical field of sewage treatment. According to the method, efficient degradation of the high-salt medical organic wastewater is achieved by taking measures such as combination of salt-tolerant nascent-state functional flora and cofactor strengthening, the salt-tolerant nascent-state functional flora comprises obligate COD degradation anaerobic granular sludge and sludge domesticated by gradient salinity pressure of medical wastewater, and the cofactor is betaine, glutamic acid, trehalose or potassium chloride. According to the method, the anaerobic methanogenesis efficiency and TOC removal of organic matters in a degradation system under salt stress can be promoted, the inhibition effect of salt on flora can be relieved and broken through the addition of cofactors, effective metabolism of pollutant nitrogen heterocyclic rings and alkane substances is promoted, refractory characteristic components of wastewater are eliminated, and the biodegradability of the wastewater is improved.
Owner:INSTITUTE OF PROCESS ENGINEERING CHINESE ACADEMY OF SCIENCES

Method for resourceful treatment of blue-green algae and reed straws

The invention provides a method for resourceful treatment of blue-green algae and reed straws, which comprises the following steps: (1) mixing dehydrated blue-green algae, crushed reed straws and water to obtain a mixture to be fermented; (2) introducing the to-be-fermented mixed material into an acidification hydrolysis fermentation tank, adding a first bacterial liquid, introducing protective gas, and carrying out acidification hydrolysis fermentation in a closed environment to obtain a fermented mixed material; (3) when the pH value and the acetic acid volume content of the fermented mixture reach target values, releasing the closed environment, and performing solid-liquid separation to obtain biogas slurry and biogas residues; (4) introducing the biogas slurry into an anaerobic methanogenesis fermentation tank, adding a second bacterial liquid, introducing protective gas for anaerobic methanogenesis fermentation, and collecting produced methane gas; and (5) introducing the biogas residue into an aerobic fermentation tank, adding an aerobic fermentation bacterial liquid, carrying out aerobic fermentation, and collecting the produced finished product organic fertilizer. According to the method provided by the invention, efficient reutilization of the blue-green algae and the reed straws is realized, the treatment efficiency and the gas production rate are improved, and large-scale popularization and application are facilitated.
Owner:CHINA CONSTR SEVENTH ENG BUREAU THE SECOND CO LTD +1

Self-gas-stirring partition plate type efficient anaerobic bioreactor and method

The invention discloses a self-gas-stirring partition plate type efficient anaerobic bioreactor and a method, and belongs to the field of nitrogen and sulfur-containing organic wastewater biological treatment devices. The reactor sequentially comprises a first reaction zone, a second reaction zone, a third reaction zone and a three-phase separation zone which are communicated with one another from bottom to top. Anaerobic granular sludge is inoculated in the first reaction zone for hydrolytic acidification reaction; anaerobic activated sludge with denitrification and sulfate reduction functions is inoculated in the second reaction area, and nitrate and sulfate reduction reaction is carried out. Anaerobic activated sludge with a methanogenesis function is inoculated in the third reaction area, and a methanogenesis reaction is carried out. The three reaction zones are separated by ecological partition plates to ensure water and air permeability and no mud permeability. According to the reactor, the ecological partition plates are arranged to realize anaerobic reaction function division, and multiple components in complex organic wastewater are synergistically removed, so that the pollutant removal efficiency is improved; the flow state in the reactor is improved through self-produced gas backflow, the mass transfer and detoxification effects are enhanced, and the decontamination effect and stability of the reactor are improved.
Owner:ZHEJIANG UNIV

Compositions and methods for treatment of livestock water supply to reduce deleterious atmospheric gas emissions

The present disclosure provides compositions and methods for reducing methane emissions from a ruminant. The method comprises introducing into a water source for a ruminant and then delivering the water to the ruminant. The compositions advantageously provide a water-stable formulation of a methanogenesis inhibitor.
Owner:ARKEA BIO CORP

Method of preparing adjustable organic fertilizer

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.
Owner:IND TECH RES INST

A method for improving the methane production and purity of anaerobic fermentation of straw-like raw materials

The present invention discloses a method for improving the methane production and purity in the anaerobic fermentation of straw-like raw materials, which comprises the following steps: S1. Pretreatment; S2. Inoculating the pretreated initial liquid material with hydrogen-producing and acid-producing microorganisms, and carrying out anaerobic fermentation by means of magnetic field strengthening and external circulation; S31. Collecting the fermentation gas in step S2, preparing nano-bubble water, then adding the pretreated initial liquid material, inoculating hydrogenophilic methanogenic microorganisms, and carrying out anaerobic fermentation to produce methane; S32. Collecting the fermentation liquid in step S2, inoculating acetic acidophilic methanogenic microorganisms, and carrying out anaerobic fermentation to produce methane by means of magnetic field strengthening and external circulation. This application separately uses acid-producing substrates and hydrogen to separate the methanogenesis stage into two independent pathways of acidophilic methanogenesis and hydrogenophilic methanogenesis. Combining magnetic field strengthening and nano-bubble technology, it improves the organic matter degradation effect, hydrogen-producing and acid-producing effect, as well as the utilization efficiency of hydrogen and acid-producing substrates, increases the methane production and purity, and shortens the entire fermentation cycle.
Owner:HENAN AGRICULTURAL UNIVERSITY +1

Dry-type high-pressure anaerobic fermentation system and method for agricultural wastes

The invention discloses a dry-type high-pressure anaerobic fermentation system and method for agricultural waste, and belongs to the technical field of biogas fermention.The dry-type high-pressure anaerobic fermentation system comprises a mixing pool, a feeding tank and an anaerobic fermentation reactor, and the feeding tank is connected with a hydrolysis pool feeding pipeline and an acid production pool feeding pipeline; the anaerobic fermentation reactor comprises a hydrolysis tank, an acid production tank and a methane production tank which are separated by a reactor outer wall, a first separation wall and a second separation wall which are arranged in a concentric circle, and a biogas collection area formed by a separation top plate and a reactor dome is arranged at the top end of the reactor outer wall; an overflow channel is formed at the top end of the first separating wall; a plurality of separating wall supporting columns are circumferentially and uniformly distributed at the bottom of the second separating wall; a leachate tank is correspondingly arranged at the bottom end of the methanogenesis tank, and a plurality of biogas slurry lifting pipes are arranged in the methanogenesis tank; a fermentation waste discharge pipeline is arranged on the side wall of the second separation wall, a biogas discharge pipe is arranged on the dome of the reactor, and the fermentation system is stable in operation, small in consumption of circulating inoculum and high in volume gas production rate.
Owner:EVERBRIGHT GREEN ENVIRONMENTAL PROTECTION TECH SERVICE (JIANGSU) CO LTD +1

Method and system for treating sludge hydrothermal carbonization liquid

The invention relates to the field of sewage treatment, in particular to a treatment method and system for a sludge hydrothermal carbonization solution. The treatment method provided by the invention comprises the following steps: adjusting the pH value of the sludge hydrothermal carbonization solution to 5-6 to obtain an initially adjusted carbonization solution; carrying out hydrolytic acidification reaction on the primarily adjusted carbonized solution to obtain a hydrolytic acidification carbonized solution; carrying out methanogenesis reaction on the hydrolytic acidification carbonization solution to obtain an anaerobic digestion carbonization solution; performing multi-stage anaerobic-aerobic denitrification treatment on the anaerobic digestion carbonization solution to obtain a denitrified carbonization solution; dephosphorizing the denitrified carbonized solution to obtain a dephosphorized carbonized solution; and carrying out resin adsorption on the dephosphorized carbonized liquid, and then discharging the dephosphorized carbonized liquid. The treatment method provided by the invention can effectively remove organic matters and nitrogen and phosphorus compounds contained in the sludge hydrothermal carbonization liquid. The concentrations of various pollutants in the discharged water meet the water quality standard of sewage discharged into urban sewers, and the problem of secondary pollution to the environment caused by wastewater generated by a sludge hydrothermal carbonization technology is solved.
Owner:MCC ECO ENVIRONMENTAL PROTECTION GRP CO LTD

A fruit peel biochar, its preparation method, and its application in enhancing methanogenesis from waste sludge.

The application provides a fruit peel biochar and a preparation method and application thereof in reinforcing residual sludge methanogenesis, and belongs to the technical field of solid waste resource treatment. The preparation method of the fruit peel biochar comprises the following steps: drying, carbonizing, and grinding banana peels after being cut into pieces to obtain the fruit peel biochar; the heating speed in the carbonizing process is 10-15 DEG C / min, the pyrolysis temperature in the carbonizing process is 500-600 DEG C, and the holding time under the pyrolysis temperature is 1-2 h. The fruit peel biochar has the advantages of strong alkalinity, and the residual sludge is pretreated first, the hydrolysis rate of the residual sludge is improved, the barrier of macromolecular substance dissolution is broken, more organic substrates are provided for the subsequent anaerobic digestion process, meanwhile, the biochar added in the pretreatment stage can still reinforce the effect of the anaerobic digestion in the subsequent stage, and a more competitive new idea for the application of the biochar in the anaerobic digestion is provided.
Owner:TIANJIN UNIV

Method for promoting anaerobic fermentation of excess sludge to produce medium-chain fatty acid by using blue iron ore

The invention belongs to the technical field of anaerobic fermentation of organic wastes, and discloses a method for producing medium-chain fatty acid by promoting anaerobic fermentation of excess sludge by using blue iron ore, which comprises the following steps: inoculating anaerobic sludge by using excess activated sludge from a municipal sewage treatment plant as a fermentation substrate, adding the blue iron ore and a methanogenesis inhibitor, adjusting the pH value, and fermenting to obtain the medium-chain fatty acid. Carrying out anaerobic fermentation in the presence of an electron donor to produce medium-chain fatty acid; due to the addition of the blue iron ore, the electron transfer capability of microorganisms in a carbon chain extension process can be enhanced, so that the yield of medium-chain fatty acid in a fermentation product is increased; the addition amount of the blue iron ore in the system is 2-20g / L. According to the method, the blue iron ore is introduced into a system for producing the medium-chain fatty acid from the sludge, the addition amount of the blue iron ore in the system is strictly controlled, the blue iron ore is used as an electron mediator, and the electron transfer efficiency of microbial fermentation in the process of producing the medium-chain fatty acid from the sludge is enhanced, so that the yield of the medium-chain fatty acid is increased; further, efficient utilization of sludge resources is realized.
Owner:HUAZHONG UNIV OF SCI & TECH

System and method for segmented regulation and control of anaerobic fermentation of biomass based on modified charcoal

The invention discloses a system and a method for segmented regulation and control of biomass anaerobic fermentation based on modified biochar. The system comprises a low-temperature biochar preparation system, a biochar modification system, a hydrolytic acidification system, a methane production system, a biogas purification and separation system and a heat utilization system. The low-temperature biochar preparation system is used for preparing low-temperature biochar and providing the low-temperature biochar to the hydrolytic acidification system and the biochar modification system, and the biochar modification system is used for carrying out carbon dioxide high-temperature modification on the low-temperature biochar to obtain modified biochar and providing the modified biochar to the methane production system; the biochar is modified according to different requirements on biochar functions in different stages of anaerobic fermentation, and low-temperature biochar and modified biochar are respectively added in a hydrolytic acidification stage and a methanogenesis stage of anaerobic fermentation, so that accurate intervention of C / N dynamic balance and inhibitor control is realized.
Owner:柏中环境科技(上海)股份有限公司 +1

Method for promoting anaerobic production of methane from sludge by using tubular pore structure biochar

The invention belongs to the technical field of sludge treatment and recycling, and relates to a method for promoting anaerobic methane production by sludge through tubular pore structure biochar. Comprising the following steps: screening, washing, segmenting and drying a biomass material with a natural grade pore network, and then pyrolyzing and screening to obtain tubular pore structure biochar; carrying out sedimentation, sieving, dilution and pyrohydrolysis on the residual sludge to obtain pretreated sludge; mixing the pretreated sludge with the inoculated sludge to obtain mixed sludge; and adding the tubular pore structure biochar and the mixed sludge into an anaerobic reactor, aerating nitrogen in the anaerobic reactor, sealing the anaerobic reactor in a water bath constant-temperature oscillator, and carrying out methane production until no methane is generated in the anaerobic reactor. According to the method, the anaerobic methanogenesis efficiency of the residual sludge is remarkably improved by utilizing the tubular pore structure biochar, and the improvement of the anaerobic methanogenesis efficiency of the sludge under the mediation of the exogenous conductive material is realized.
Owner:NORTHWEST ENGINEERING CORPORATION LIMITED +1

A method for enhancing high solid content anaerobic fermentation by micro-aerobic aeration

The present invention belongs to the technical field of agricultural waste resource utilization, and specifically relates to a method for strengthening high-solid content anaerobic fermentation by micro-aerobic aeration. The present invention provides a method for strengthening high-solid content anaerobic fermentation. The technical scheme of the present invention improves the utilization efficiency of all components of agricultural waste and improves the gas production rate by performing micro-aerobic aeration on the 1st to 3rd day and / or the 12th to 14th day of anaerobic fermentation. Magnetic porous microspheres (MPMs) are added to enrich efficient methanogens by utilizing the porous characteristics of MPMs, and the electron transfer capacity of the solid-liquid interface is improved by layered inoculation of inoculum and external application of weak magnetic field and weak electric field, thereby improving the degradation of lignocellulose and the efficiency of methanogenesis. Adding biological lipopeptide surfactants in the leachate reflux process can promote the generation of organic acids, increase the activity of coenzyme F420, a key enzyme for methanogenesis, promote the conversion of intermediate products, and improve the biodegradability and gas production rate of agricultural waste.
Owner:INSTITUTE OF ENVIRONMENT AND SUSTAINABLE DEVELOPMENT IN AGRICULTURE CAAS

Kitchen waste anaerobic digestion treatment and resource utilization system

The invention discloses a kitchen waste anaerobic digestion treatment and resource utilization system which comprises a pretreatment subsystem, an anaerobic digestion subsystem, a biogas purification and utilization subsystem and a biogas slurry and biogas residue resource subsystem which are sequentially connected along the material flow direction, the pretreatment subsystem is used for carrying out impurity separation, pulping and oil extraction on incoming kitchen waste; and the anaerobic digestion subsystem is used for carrying out hydrolytic acidification and methanogenesis reaction on the pretreated organic slurry to generate biogas. According to the invention, through integration of high-efficiency pyrohydrolysis pretreatment, two-phase anaerobic digestion enhancement and multi-element resource deep treatment, the spanning of kitchen waste treatment from reduction to high value is realized, and the beneficial technical effects of the system are reflected in that: through pyrohydrolysis and multi-stage separation pretreatment, the organic matter degradation efficiency and the grease recovery rate are remarkably improved; and the acidification risk of the system is effectively relieved by combining two-phase anaerobic digestion with a trace element strengthening strategy, and the biogas yield and the operation stability are greatly improved.
Owner:FUDAN UNIVERSITY

Segmented anaerobic-aerobic combined reaction device system and application thereof

The invention provides a segmented anaerobic-aerobic combined reaction device system and application thereof. The device system comprises an acidification hydrolysis fermentation unit, a solid-liquid separation unit, an anaerobic methanogenesis fermentation unit and an aerobic fermentation unit, wherein the acidification hydrolysis fermentation unit, the solid-liquid separation unit and the anaerobic methanogenesis fermentation unit are sequentially connected through pipelines; the aerobic fermentation unit is connected to a slag outlet of the solid-liquid separation unit through a conveying belt. The device system provided by the invention has the functions of anaerobic fermentation and aerobic fermentation, is particularly suitable for resourceful treatment of blue-green algae and reed straws, and performs resourceful treatment of the blue-green algae straws by combining the physicochemical properties of the blue-green algae and reed straws, the characteristic of methane production by anaerobic fermentation and the advantage of aerobic fermentation after dehydration of biogas residues; the efficient reutilization of blue-green algae and reed straws is realized, the treatment efficiency and the gas production rate are improved, and the stable operation of the system is ensured.
Owner:CHINA CONSTR SEVENTH ENG BUREAU THE SECOND CO LTD +1

Sludge reduction sewage treatment device

ActiveCN224691934UMethanobacterMethanogenesis
The utility model belongs to sewage treatment technical field, specifically is a kind of sludge reduction's sewage treatment equipment, including base, the base top is fixed with processing cylinder, the processing cylinder bottom is fixed with bottom plate, by setting movable cylinder, second movable shaft, stirring plate, stirring rod and stirring ring, can make sludge particle in sewage even suspended, let hydrolytic bacteria, methanogen etc. and the organic matter in sludge fully contact, accelerate hydrolysis, acidification and the rate of methanogenesis reaction, reduce substrate residue, and anaerobic sludge is kept for a long time, can form dense precipitate layer in processing cylinder bottom, lead to effective reaction volume shrinkage, stirring can make sludge keep suspended state, maintain the effective volume utilization rate of processing cylinder, while anaerobic treatment needs stable temperature, if not stirring, local temperature difference in processing cylinder is easy to appear, lead to microbial activity imbalance, by stirring can maintain the uniformity of sewage anaerobic environment, stable reaction condition.
Owner:JIANGSU AOYANG ENVIRONMENTAL TECH CO LTD

Method for improving methane production by anaerobic digestion through hydrothermal thermochemistry

The invention discloses a method for improving methane production by anaerobic digestion through hydrothermal electrochemistry, which comprises the following steps: dispersing livestock and poultry manure by using a water solvent to obtain a raw material solution, carrying out anaerobic digestion treatment on the raw material solution under external voltage through an electrochemical anaerobic digestion system, and dehydrating the material solution subjected to anaerobic digestion to obtain a biogas residue solution with adjusted solid content, carrying out a heating hydrolysis reaction under a low-oxygen or anaerobic condition; after the hydrolysis reaction, the feed liquid is directly introduced into a flash tank, so that the pressure of the feed liquid is suddenly reduced, the temperature is reduced along with the room temperature environment, macromolecular substances are cracked into micromolecular substances under the flash evaporation effect, and then centrifugal treatment is performed to obtain biogas residue pyrohydrolysate and livestock and poultry manure biogas residues. The method provided by the invention not only can produce methane at high yield, but also enhances the degradation effect of organic matters in the raw material solution.
Owner:ZHEJIANG TIANDI ENVIRONMENTAL PROTECTION TECH CO LTD +1

An anaerobic bio-fermentation process for the targeted degradation of municipal sewage sludge

This invention discloses an anaerobic bio-fermentation process for the targeted degradation of municipal sewage sludge, belonging to the field of sludge treatment technology. The process includes: pretreatment and targeted activation of components; staged hydrolysis and acidification for targeted production of short-chain fatty acids; methanogenic fermentation mediated by conductive materials coupled with a microbial electrolysis cell for assistance; multi-parameter dynamic control based on online monitoring and intelligent algorithms; magnetic separation, recovery, and recycling of magnetic conductive materials; in-situ biogas purification and product gradient reflux; solid-liquid separation and residue resource utilization. This invention achieves kinetic matching and metabolic enhancement of hydrolysis and acidification and methanogenesis through the deep linkage of four modules: targeted hydrolysis and acidification, enhanced direct interspecies electron transfer via a microbial electrolysis cell, magnetic material circulation, and intelligent control. Compared with existing technologies, the methane yield is increased by more than 40%, propionic acid accumulation is below 50 mg / L, the fermentation cycle is shortened to 8-10 days, and system energy consumption is reduced by 20%.
Owner:GUANGXI CONSTR ENG GRP UNITED CONSTR CO LTD

Method for rapidly constructing denitrification type anaerobic methane oxidation through hydrogen type methanogens

PendingCN121672763AWaste based fuelTreatment with anaerobic digestion processesAnaerobic oxidation of methaneMethanobacter
The invention discloses a method for rapidly constructing denitrification type anaerobic methane oxidation through hydrogen type methanogens, and relates to the technical field of sewage treatment. According to the method, anaerobic digestion sludge of a sewage treatment plant is taken for inoculation, and a methanogen-mediated denitrification type anaerobic methane oxidation process is constructed. Hydrogen-type methanogens in the anaerobic digestion system excite a reverse methanogenesis function under the condition that organic matters are deficient, and denitrification anaerobic methane oxidation is realized by coupling sulfate and nitrate with nitrogen and sulfur circulating microorganisms. Sulfate is used as a potential electron acceptor in sewage, and dissoluble methane is removed while sulfate is indirectly utilized through recessive biological sulfur cycle catalytic bridging anaerobic methane oxidation and denitrification. In addition, the anaerobic digestion sludge can be continuously inoculated with hydrogen-type methanogens, and compared with traditional denitrification type anaerobic methane oxidation archaea culture, the method is more convenient. Therefore, the denitrifying anaerobic methane oxidation rapidly constructed by the hydrogen-type methanogens is an effective measure for breaking through the deep denitrification of the sewage treatment plant and synchronously controlling and discharging the greenhouse gas.
Owner:CHONGQING UNIV

Hydrogen generation within high salinity hydrocarbon-bearing reservoirs

A process includes identifying a hydrocarbon-bearing reservoir containing a hydrocarbon fluid and a brine having a sufficient salinity level to prevent or inhibit one or more of methanogenesis and sulphate-reduction activity, and responsive to a concentration of hydrogen being below 1000 parts per million in a sample collected from the hydrocarbon-bearing reservoir, introducing at least one non-native or indigenous hydrogen producing microorganism or stimulating the activity of at least one indigenous bacteria capable of stimulating a microbial consortium to increase a production rate of hydrogen in the hydrocarbon-bearing reservoir.
Owner:CHEVRON USA INC

Application of calcium peroxide pretreatment coupled with two-phase anaerobic digestion in promoting methanogenesis

The present invention discloses the application of calcium peroxide pretreatment coupled with two-phase anaerobic digestion in promoting methane production. The invention utilizes calcium peroxide pretreatment technology to give play to the advantages of the separation of the acid-producing phase and the methane-producing phase in the two-phase anaerobic digestion process, effectively promotes the enrichment of methanogenic functional bacteria in sludge anaerobic digestion, greatly improves the methane production rate, shortens the methane production hysteresis period, and realizes efficient energy conversion of sludge.
Owner:TONGJI UNIV

Energy production with hyperthermophilic organisms

The present invention relates to the field of degradation with hyperthermophilic organisms, and in particular to the use of hyperthermophilic degradation to produce heat and energy rich components including hydrogen and ethanol from a biomass. In some embodiments, a biomass is fermented in the presence of hyperthermophilic organisms to produce heat. The heat is used to heat a liquid which is used directly in a heat pump or radiant heat or to produce electricity or drive a steam turbine. In some embodiments, acetate is utilized as a substrate to produce energy by methanogenesis.
Owner:HYPERTHERMICS HLDG

Efficient lignocellulose degradation compound strain and application thereof in production of methane by fermenting straws

PendingCN121975632AFungiHydrolasesBiotechnologyPhanerochaete
The invention discloses an efficient lignocellulose degradation compound strain and application thereof in producing methane by fermenting straws. The lignocellulose degradation compound strain is prepared from phanerochaete chrysosporium, oyster mushroom, phoenix mushroom and talaromyces pinophilus. When the composite strain is used for pretreating straws, the degradation rate of cellulose in the straws reaches 77.86%, the degradation rate of hemicellulose in the straws reaches 21.01%, and the degradation rate of lignin in the straws reaches 34.85%; when the pretreated straw and the excrement are subjected to anaerobic fermentation together, compared with a control group, the total gas production rate is increased by 86.28%, and the methane production rate is increased by 98.95%. Therefore, the invention provides a green and efficient straw resource utilization technology so as to synchronously realize the purposes of waste reduction, energy recovery and fermentation residue resource utilization.
Owner:SOUTH CHINA AGRICULTURAL UNIVERSITY

Biological resourceful treatment method and system for brine discharge wastewater of retired lithium battery

The invention relates to a biological resourceful treatment method and system for decommissioned lithium battery brine discharge wastewater, and the method comprises the following steps: (1) dividing the pretreated decommissioned lithium battery brine discharge wastewater into a first part of wastewater and a second part of wastewater, inoculating the first part of wastewater with a pre-domesticated salt-tolerant functional flora, hydrolyzing and fermenting organic components to generate fermentation liquor containing short-chain carboxylic acid; and (2) mixing the fermentation liquor with a second part of wastewater, and carrying out carbon chain extension reaction to generate treatment liquor containing medium-chain carboxylic acid and long-chain alcohol products. According to the method, the special pollutant composition and the high-salt characteristic of the discharge wastewater are utilized, the methanogenesis process is inhibited without using expensive chemical agents or treating inoculums at a high temperature and the like, electron donors such as ethanol or lactic acid and the like do not need to be additionally added, the agent or energy consumption cost in the process is greatly reduced while the organic pollutants in the wastewater are subjected to high-value conversion, and the method is suitable for industrial production. The method has the remarkable advantages of simple operation, green process, low cost and the like.
Owner:INSTITUTE OF PROCESS ENGINEERING CHINESE ACADEMY OF SCIENCES

Method for regulating and controlling anaerobic fermentation grading through intermediate product feedback

The invention provides a method for regulating and controlling anaerobic fermentation grading through intermediate product feedback, in the method, the stage number of hydrolysis stages is divided according to the hydrolysis characteristic of a fermentation material, the stage number of acid production stages is divided according to the acid production characteristic of a hydrolysate, a methane production stage is set as a first-stage methane production reactor, and a second-stage methane production reactor is set as a second-stage methane production reactor; grading nodes of all stages of anaerobic fermentation are provided, efficient and stable operation of multi-stage anaerobic fermentation can be achieved, and the method is simple and easy to implement.
Owner:中广核环保产业有限公司 +1

Method for enhancing anaerobic methanogenesis in high-solid sludge and reducing sludge resistance genes using nitrogen-doped nanofibers anchored with nickel nanoparticles

A method for enhancing anaerobic methane production and reducing sludge resistance genes in high-solid sludge using nitrogen-doped nanofiber-anchored nickel nanoparticles relates to a method for treating high-solid excess sludge. The method aims to address the technical issues of poor treatment efficiency and low methane production in existing anaerobic digestion systems using conductive materials. This method involves: 1. preparing a nickel nanoparticle precursor using a sol-gel method; 2. preparing nanofibers containing the nickel precursor by electrospinning; 3. preparing nitrogen-doped nanofiber-anchored nickel nanoparticles by high-temperature sintering; 4. adding high-solid sludge, inoculated anaerobic sludge, and nitrogen-doped nanofiber-anchored nickel nanoparticles to an anaerobic digestion reactor for anaerobic digestion. Compared to a blank control, the cumulative methane production and maximum production rate increased by 25.66% and 28.21%, respectively; the average COD degradation rate increased by 34.22%; and the resistance gene content decreased by 8.18% to 19.10%. This method can be used in the treatment of high-solid sludge.
Owner:HARBIN INST OF TECH +1

Inhibition of microbial methanogenesis

Hypophosphite is used to inhibit syntrophic methanogenesis or growth of hydrogenotrophic methanogens, plants are genetically engineered to comprise and express a heterologous hypophosphite / 2-oxoglutarate dioxygenase htxa gene to enable the use of the reduced phosphorus, such as hypophosphite as a phosphorus source, and hypophosphite and phosphite fertilizer amendments are utilized as phosphorus sources by soil microorganisms, to increase carbon storage in deep sediments.
Owner:RGT UNIV OF CALIFORNIA

Methods and systems for enhancing methanogenesis for subsurface methane production optimization

A method for optimal production of methane from a storage horizon configured as an underground bioreactor, the method including obtaining environmental data for a renewable energy facility that produces hydrogen and obtaining process data from an industrial facility that produces carbon dioxide. The method further includes injecting the produced hydrogen, the produced carbon dioxide, and a selection of microbes, the selection defined by a set of microbe parameters, into the bioreactor. The bioreactor produces a quantity of methane that is controlled by, at least in part, a set of operation parameters. The method further includes determining, with a composite artificial intelligence model, a predicted methane production from the bioreactor based on the environmental data, the process data, the set of microbe parameters, and the set of operation parameters and adjusting, automatically, the set of operation parameters and the set of microbe parameters to optimize methane production.
Owner:SAUDI ARABIAN OIL CO

A method for treating organic solid waste and wastewater and an anaerobic biological reaction system thereof

The present invention provides a method for treating organic solid waste and wastewater and an anaerobic bioreactor system thereof, and relates to the field of anaerobic reactor fermentation technology. The anaerobic bioreactor system includes: a reaction tank body, a filter assembly, and a biogas circulation assembly; the reaction tank body includes an anaerobic hydrolysis and acidification reaction tank and an anaerobic methanogenesis reaction tank; the filter assembly can perform membrane separation treatment on the mud-water mixture and can discharge the filtrate from the anaerobic methanogenesis reaction tank; the biogas circulation assembly is connected to the anaerobic hydrolysis and acidification reaction tank and the anaerobic methanogenesis reaction tank for collecting biogas and returning the biogas. A reciprocating drive assembly drives the membrane filtration device to move back and forth, and removes the mud cake layer on the surface of the membrane fiber through shaking inertia. The present invention improves the efficiency of organic solid waste and wastewater treatment, improves the effluent water quality, and enhances energy recovery capacity through the comprehensive optimization of structural design, membrane separation treatment, and biogas recycling, showing significant environmental and economic benefits.
Owner:HUAZHONG UNIV OF SCI & TECH +1