229 results about "Anaerobic sludge" patented technology

The invention discloses latex skeleton aerobic granular sludge and a preparation method thereof, and belongs to the technical field of sewage treatment. The aerobic granular sludge takes a porous natural latex carrier as a core skeleton, anaerobic sludge is fixed on the carrier, and after being mixed and wrapped with a sodium alginate solution, the mixture is dropwise added into a calcium chloride solution to be cured to form gel particles. The preparation method comprises the following steps: crushing the natural latex, screening to obtain particles with the particle size of 0.4-1.2 mm, and soaking the particles in alkali liquor with the pH value of 10-12; the method comprises the following steps: centrifugally concentrating anaerobic sludge to 10000 to 20000 mg / L; mixing the treated latex carrier, anaerobic sludge and a 1%-5% sodium alginate solution according to a volume ratio of 5: (2-5): (2-5); dropwise adding the mixture into a calcium chloride solution with the concentration of 3-7%, and curing to form gel particles; and putting the gel particles into a sewage treatment aerobic tank, injecting domestic sewage, and carrying out aeration domestication for 3-6 days until the particles become earthy yellow. The granular sludge prepared by the invention has the advantages of stable structure, good settling performance and high pollutant removal efficiency.

The anaerobic reactor comprises a shell with an opening in the top, a water distribution device, a muddy water lifting device and a biogas guiding device are sequentially arranged in the shell from bottom to top at intervals, the water distribution device is connected with a water inlet pipe, and the muddy water lifting device is connected with a water outlet pipe. The muddy water lifting device comprises a gas collecting hood and an upflow pipe connected to the center of the top of the gas collecting hood, the biogas guiding device comprises a three-phase separator and an exhaust pipe connected to the center of the top of the three-phase separator, the exhaust pipe is connected with the biogas tank, the upflow pipe spirally extends upwards, and the total muddy water lifting amount of the muddy water lifting device is more than three times of the water inlet amount. When the anaerobic reactor operates under a high-load condition, rapid degassing of anaerobic sludge can be realized, sludge leakage of the anaerobic reactor is effectively prevented, and a support is provided for retention of sufficient sludge in the reactor and efficient and stable operation of the reactor.

The invention relates to the technical field of anaerobic reactors, and provides a water distribution device of a UASB anaerobic reactor, the water distribution device comprises a shell and a conveying mechanism, a sludge zone and a reaction zone are arranged in the shell, the sludge zone surrounds the outer side of the reaction zone, and the conveying mechanism is arranged in the shell and is used for feeding sludge and sewage into the reaction zone; the conveying mechanism comprises a water conveying pipe, a collecting pipe and a sludge conveying assembly, the water conveying pipe and the collecting pipe are both arranged in the shell, the inlet end of the water conveying pipe penetrates out of the shell to be used for spraying sewage, and the outlet end of the water conveying pipe extends to the sludge area; the inlet end of the collecting pipe extends to the sludge area, the outlet end of the collecting pipe extends to the reaction area, the inlet end of the collecting pipe is connected with a suction bin, and the suction bin directly faces the outlet end of the water supply pipe; the sludge conveying assembly is arranged in the sludge area and used for pushing sludge in the sludge area into the suction bin. According to the water distribution device of the UASB anaerobic reactor, the mass transfer efficiency can be improved, and the possibility of sludge stacking and hardening is reduced.

The invention discloses an iron-loaded biomass charcoal reinforced PN-Anammox integrated nitrogen removal method and a preparation method thereof. The preparation method comprises the following steps: firstly, selecting a proper biomass material, drying the biomass material, soaking the biomass material in an iron salt solution, and performing post-treatment to obtain biomass charcoal particles Fe / BC loaded with micro-nano iron; then inoculating the Fe / BC and anaerobic ammonia oxidation sludge into an anaerobic reactor for culturing, and regulating and controlling process parameters to form Fe / BC-Anammox composite anaerobic sludge particles; and then inoculating into a reactor containing domesticated and matured short-cut nitrification sludge, regulating and controlling reaction conditions to construct an integrated denitrification system, monitoring the effect, and enabling the denitrification system to stably operate within a certain dissolved oxygen fluctuation range. The method has a wide prospect in the field of ammonia nitrogen wastewater treatment, and a new method is provided for solving the problem of poor stability of related PN-Anammox integrated denitrification.

The invention discloses an autotrophic nitrogen removal and detoxification device and method for treating coking wastewater through two-stage low-oxygen short-cut nitrification, sulfur autotrophic denitrification and anaerobic ammonia oxidation, and belongs to the field of sewage treatment. The device comprises a water inlet tank, a sequencing batch reactor, a middle water tank and an up-flow anaerobic sludge blanket reactor. The method comprises the following steps: enabling the coking wastewater which is subjected to carbon capture and contains ammonia nitrogen and thiocyanate to enter a sequencing batch reactor, oxidizing the ammonia nitrogen into nitrite under a limited oxygen condition, and generating nitrogen, sulfate and ammonia nitrogen from the thiocyanate and the nitrite by autotrophic denitrifying bacteria; reaction effluent mixed with coking wastewater enters an upflow anaerobic sludge blanket, and anaerobic ammonium oxidation bacteria convert ammonia nitrogen and nitrite into nitrogen and generate a small amount of nitrate; and the residual nitrate, nitrite and thiocyanate are continuously and thoroughly removed through the sulfur autotrophic denitrification effect. The method provides a new idea for economical and efficient autotrophic nitrogen removal and detoxification of the coking wastewater containing thiocyanate and ammonia nitrogen.

The utility model discloses a sludge supplement device for wastewater treatment, which comprises a wastewater buffer tank and a sludge culture and storage tank which are communicated with each other, the inner cavity of the sludge culture and storage tank is divided into an aerobic zone and an anaerobic zone through a partition plate, the top of the aerobic zone is provided with an integrated sensor, and the bottom of the aerobic zone is communicated with the bottom of the anaerobic zone; a three-phase separator is arranged at the top of the anaerobic zone, and a gas outlet of the three-phase separator is communicated with a biogas water-sealed tank; the aerobic zone and the anaerobic zone are respectively communicated with an activated sludge supplementing pipeline and an anaerobic sludge supplementing pipeline; a controller is arranged on the shell, and a display screen is arranged on the controller. According to the device, homologous wastewater is utilized to effectively domesticate activated sludge similar to flora in a sewage treatment system, and the residual activated sludge is subjected to anaerobic digestion, so that anaerobic sludge is cultured, and the device is relatively high in applicability, can be well used for supplementing sludge to the complex sewage treatment system, and has a wide application prospect. Wastewater and waste gas in the culture process are well treated, and secondary pollution to the environment is avoided.

The invention relates to a landfill leachate pretreatment hardness removal process and a landfill leachate pretreatment hardness removal system, which are specifically characterized in that at the front end of landfill leachate anaerobic reaction treatment of a landfill power plant, landfill leachate raw water and alkaline anaerobic reactor reflux water are fully mixed, the pH value of the mixed liquid is monitored in real time, and the reflux quantity of an anaerobic reactor is adjusted in real time, so that the landfill leachate is subjected to alkali adjustment treatment (pHgt; 7.5), then adding sodium carbonate to generate calcium and magnesium precipitates, then adding polymeric ferric sulfate, activated sludge and polyacrylamide to improve the precipitation effect, enabling the effluent to selectively pass through sand filtration to further remove the calcium and magnesium precipitates in the leachate, and removing the calcium and magnesium precipitates in the leachate subjected to hardness removal treatment, the leachate can be further treated by adopting an anaerobic-AOAO-membrane treatment method. The invention provides a device based on the process, the problems of high cost and the like of hardness removal by a dual-alkali method are solved, the activity of anaerobic sludge and aerobic sludge in the later period can be improved, and the service life of a membrane device is prolonged.

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.

The utility model belongs to the field of anoxic tanks, and particularly relates to an anaerobic sludge interception device which comprises a sewage tank, a placement plate is fixedly connected to an inner cavity of the sewage tank, and a circulating mechanism is arranged at the bottom of the placement plate; the circulating mechanism comprises a first hollow groove, the first hollow groove is formed in the surface of the placement plate, a hollow pipe is fixedly connected to an inner cavity of the first hollow groove, a valve is fixedly connected to an inner cavity of the hollow pipe, a water pump is fixedly connected to one side of the sewage pool, and a second hollow groove is formed in the surface of the sewage pool; sewage is poured into the sewage pool and purified by activated sludge, the treated sewage is discharged to the lower side in the sewage pool through the hollow pipe, the water pump pumps the sewage in the sewage pool through the first water pipe, the sewage is discharged to the upper side in the sewage pool through the second water pipe, and the sewage is purified by the activated sludge again. The sewage treatment effect can be better, an additional new sewage pool is not needed, and the occupied space is reduced.

The invention discloses an up-flow anaerobic sludge blanket reactor alkalinity prediction method, device, equipment and medium, and relates to the technical field of wastewater treatment.The method comprises the steps that characteristic data are obtained, alkalinity generation tests in the anaerobic digestion process of all substances are conducted through a control variable method and characteristic data of an acid wastewater sample in wastewater, and the characteristic data are obtained; constructing an alkalinity generation mechanism model; training the initial alkalinity prediction model by using monitoring data obtained by monitoring gas parameters and liquid phase parameters in a reactor, alkalinity titration data obtained by monitoring the alkalinity of an acid wastewater sample and alkali addition data determined based on the operation states of the reactor under different conditions in combination with an alkalinity generation mechanism model; and based on the to-be-detected parameters and by utilizing the obtained target alkalinity prediction model, predicting the alkalinity in the reactor so as to determine whether alkali needs to be additionally added into the reactor and determine the amount of the alkali which is additionally added into the reactor. And the alkalinity in the reactor is accurately predicted so as to control the minimum dosage of the exogenous alkali.

The invention discloses an anaerobic reactor for preventing floating sludge. The anaerobic reactor comprises a reactor body, a water inlet distribution system, a circulating pipe, a circulating pump, a primary separator, a secondary separator and a sludge reflux pump, the secondary separator is mounted at the bottom of the anaerobic reactor and is used for precipitating and separating anaerobic sludge in effluent of the primary separator, the secondary separator is totally closed and comprises a precipitation module and a sludge hopper, a top plate is arranged at the top of the precipitation module, and a water inlet is formed in the top plate and is connected with a water outlet of the primary separator; and the bottom of the sludge hopper is provided with a sludge reflux inlet connected with the sludge reflux inlet at the bottom of the reactor. The degassing effect of the three-phase separator is better than that of a common three-phase separator only based on inertial collision or hydraulic baffling; the amount of bubbles in wastewater and sludge is small, the settling speed is high, and a good separation effect on granular sludge or flocculent sludge is achieved; meanwhile, uneven distribution of hydraulic loads can be prevented, and the utilization rate of the sedimentation area is higher.

The invention belongs to the technical field of environmental microorganisms, and particularly relates to a sulfamethoxazole anaerobic degradation strain SA-9 and application thereof. According to the present invention, anaerobic sludge collected from the vicinity of a farm is subjected to enrichment domestication, separation and purification to obtain the bacterial strain capable of efficiently and rapidly performing anaerobic degradation on sulfamethoxazole (SMX), and the morphological and molecular biological identification results show that the bacterial strain belongs to Cupidesulfavibrio, and is named as Cupidesulfavibrio sp.SA-9; the strain can rapidly degrade SMX under an anaerobic condition, and the degradation half-life period is 7.6 d. The strain disclosed by the invention can be used as a biodegradation bacterium to be applied to bioremediation of SMX polluted environments, equipment and facilities.

The present application belongs to the technical field of wastewater treatment, and discloses a method for treating electroplating wastewater by using bioreduction of biogas slurry and combined iron bio-oxidation, which is a secondary combined use technology for removing various heavy metals in electroplating wastewater by iron bio-oxidation, comprising the following steps: (1) collecting fermentation biogas slurry, and performing ultraviolet irradiation sterilization after aeration; (2) adding potassium dichromate solution and fresh nutrient solution to the sludge system, and culturing anaerobic sludge; (3) adding treated biogas slurry to the anaerobic sludge, and repeatedly domesticating chromium-reducing microorganisms; (4) configuring a mixed solution of comprehensive electroplating wastewater and biogas slurry according to a certain proportion; (5) building a primary treatment biological reactor, and reducing Cr(VI) in wastewater by anaerobic biological reduction under the promotion of pyrite; and (6) building a secondary biological reactor filled with straw biomass charcoal, and generating iron oxides under the action of functional bacteria to continue adsorbing Cd, Cu and Ni ions in wastewater.

The present application discloses a mesh plate type garbage cleaning machine for sludge anaerobic digestion device, which relates to the technical field of garbage cleaning machines, and comprises a main body, wherein four groups of universal wheels are symmetrically arranged on the outer surface of the bottom of the main body, a sludge inlet is arranged on the outer surface of the top of the main body, a control device and two groups of sewage outlets are arranged on the outer surface of the left side of the main body, and the control device is located above the two groups of sewage outlets, and four groups of lifting chambers are arranged in parallel on the inner surface of the top of the main body, a moving platform is arranged on the top of each pair of lifting chambers, and the two groups of moving platforms are parallel to the inner walls of the front and rear sides of the main body, two groups of support rods are arranged on the outer surface of one side close to the two groups of moving platforms, and two groups of first motors are arranged on the outer surface of one side close to the two groups of moving platforms, and the two groups of first motors are located on the inner sides of the corresponding two groups of support rods. Through the cooperation of the above structures, the sludge anaerobic digestion device can be effectively cleaned and translated to ensure the cleaning effect.

The utility model relates to the technical field of sewage treatment, in particular to a sewage UASB (Upflow Anaerobic Sludge Blanket) anaerobic tower which comprises a shell, the shell comprises a tower body, a water inlet pipe is fixedly connected to the surface of the tower body, a water distributor is arranged on the inner side of the tower body, and an anaerobic sludge bed is arranged on the inner side of the tower body. Through the arrangement of the filter plate, impurities in sewage can be intercepted, the impurities can be prevented from entering the tower body along with the sewage, meanwhile, the water inlet pipe and the water distributor can be prevented from being blocked by the impurities, and inflow and distribution of the sewage can be guaranteed, so that the sewage can be better reacted; the insertion blocks can be inserted into and separated from the insertion grooves through the movement of the insertion blocks in the movable grooves, so that the filter box and the filter plate can be conveniently fixed and detached, the filter plate can be conveniently cleaned and replaced in the use process, the impurity intercepting effect of the filter plate can be guaranteed, and sewage can better enter the tower body.

The invention discloses a water quality type identification method, device and equipment for coal-based new material wastewater and a medium, and relates to the technical field of wastewater treatment.The method comprises the steps that target wastewater generated in the coal-based new material production process is simulated; determining operation state parameters of a preset up-flow anaerobic sludge blanket reactor in the process of treating the target wastewater, and determining a first data set based on the operation state parameters; preprocessing the first data set to obtain a second data set, and processing the second data set to obtain a third data set; training the target model by using the third data set to obtain a trained model; and when the current wastewater is treated through the preset up-flow anaerobic sludge blanket reactor, identifying the water quality type of the current wastewater based on the trained model and the current operation state parameters of the preset up-flow anaerobic sludge blanket reactor so as to determine whether to trigger corresponding wastewater early warning operation. According to the method, different types of water quality impact in the coal-based wastewater treatment process can be accurately and quickly identified.

The resource utilization type sewage treatment equipment comprises a box body internally provided with a containing cavity, the box body is provided with a water inlet and a water outlet, three partition plates are arranged in the containing cavity at intervals, and the containing cavity is divided into a primary sedimentation tank, an anaerobic fermentation tank, a sludge fermentation tank and a reuse water storage tank which are sequentially communicated. According to the utility model, the accommodating cavity is divided into the primary sedimentation tank, the anaerobic fermentation tank, the sludge fermentation tank and the recycled water storage tank which are sequentially communicated through the three partition plates, large-particle impurities in sewage are subjected to hydrolytic acidification and sedimentation in the unit through the primary sedimentation tank, and then microorganism-attachable suspended filler is added through the anaerobic fermentation tank; the acidified and hydrolyzed sewage is deeply fermented and decomposed by anaerobic microorganisms in the area and is further purified. And the sludge fermentation tank is divided into an anaerobic sludge fermentation zone, a three-dimensional filter material microbial reaction zone, a microporous ceramsite adsorption zone and gravel filtration plant absorption from bottom to top, so that the ultimate purification of water quality is achieved.

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.

The invention relates to a microbial agent for degrading COD (Chemical Oxygen Demand) in DBP (Dibutyl Phthalate) wastewater as well as a preparation process and application of the microbial agent. The microbial agent is prepared from the following active components in parts by weight: 88 to 91 parts of pseudomonas, 5.2 to 5.6 parts of enterobacter and 0.05 to 0.11 part of alcaligenes. According to the application, a plurality of microbial strains are formed in the microbial liquid which is subjected to mixed domestication culture of the DBP wastewater, the anaerobic sludge, the hydrolytic acidification bacteria and the nutritive salt, and a plurality of microbial strains in the microbial agent which is obtained by mixing the microbial liquid after bacteria screening and expanding culture have a synergistic effect, so that the microbial agent has the performance of efficiently degrading COD in the DBP wastewater in an environment-friendly manner.

The invention discloses a method for treating PBAT wastewater by zero-energy-consumption enhanced anaerobic bacteria, which comprises the following steps: (1) uniformly mixing Fe3O4 and GAC according to a certain mass ratio, so that Fe3O4 powder is uniformly attached to the surface of the GAC to prepare a Fe3O4-coated GAC complexing agent, and adding the Fe3O4-coated GAC complexing agent into an anaerobic reactor filled with PBAT wastewater and anaerobic sludge; and (2) forming a magnetic field environment on the outer side of the anaerobic reactor, and coupling the Fe3O4-coated GAC complexing agent with an exogenous magnetic field to form an endogenous current to strengthen anaerobic bacteria in the anaerobic sludge to treat the PBAT wastewater until COD is not degraded any more. According to the zero-energy-consumption method for strengthening anaerobic bacteria treatment of the PBAT wastewater, no chemical agent needs to be added, the operation cost is low, secondary pollution is avoided, generated fuel gas such as methane can be recycled, secondary economic benefits can be generated, the method has the advantages of being efficient, environmentally friendly and economical, and a new solution is provided for treatment of the PBAT wastewater.

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 utility model relates to a kitchen garbage composting treatment system which comprises a filter pressing water tank, a crusher, a dehydrator, a vertical high-temperature fermentation tank, a primary regulating tank, a secondary regulating tank, an oil separation tank, an air floatation tank, an up-flow anaerobic sludge bed and sewage treatment integrated equipment, the dehydrator is located below the crusher, and a waste outlet of the dehydrator is connected to the vertical high-temperature fermentation tank through a spiral conveyor; according to the kitchen waste compost treatment system, natural percolation is carried out through the filter pressing conveying structure, the pressure of subsequent manual sorting and crushing dehydration is relieved, energy consumption is low, the system design follows the unpowered principle, the terrain difference and the hydraulic gravity self-flowing effect are fully utilized, vertical high-temperature fermentation is used, the advantages of a microbiological treatment technology are combined, and high-temperature fermentation is achieved. Meanwhile, the defect that the fungicide needs to be added regularly in the technology is overcome. The kitchen waste composting treatment system can meet the harmless requirement of kitchen waste treatment.

The present invention provides a method for treating erythromycin thiocyanate residue, which comprises: A) subjecting erythromycin thiocyanate residue to electron beam irradiation treatment; B) inoculating anaerobic sludge with erythromycin thiocyanate residue obtained in step A) for anaerobic fermentation; C) subjecting the fermentation liquid obtained in step C) to electron beam irradiation deep treatment, enriching and concentrating the obtained fermentation liquid, and obtaining a biomass carbon source. The method for treating erythromycin thiocyanate residue provided by the present application combines electron beam pretreatment with anaerobic fermentation, and further subjecting the obtained fermentation liquid to electron beam deep treatment, thereby solving the problems of antibiotic residues and resistance genes in fermentation-type erythromycin thiocyanate residue; solving the problem that the amount of acid, alkali and oxidant added in the erythromycin thiocyanate residue treatment process is large, resulting in excessively high inorganic salt content in the subsequent residue; solving the problem that a large amount of clean water needs to be added for dilution, and the problem that macromolecular organic matter such as protein and lipid in mycelium is difficult to be utilized by microorganisms.

The invention discloses a low-consumption green nitrogen removal method, and relates to a green nitrogen removal method of a sewage treatment plant. The method comprises the following steps: (1) mixing high nitrate nitrogen wastewater and high sulfur wastewater to obtain mixed wastewater; and (2) adding anaerobic sludge into the mixed wastewater, and stirring until the mixed treatment is stably operated to obtain nitrogen-removed wastewater. According to the invention, an operation mode is adopted under the conditions that carbon sources are saved and effluent is qualified, and finally, qualified emission, energy conservation and consumption reduction are realized.

The invention discloses a novel method for generating electricity by treating aged landfill leachate through a Co3O4 / Ni-MOF anode single-chamber MFC, and belongs to the technical field of inorganic environment materials and waste water resource utilization. The method comprises the following steps: firstly preparing different materials and taking the different materials as an anode catalyst of a microbial fuel cell (MFC), then constructing a single-chamber MFC, taking anaerobic activated sludge obtained by culturing aerobic activated sludge of a sewage treatment plant as anolyte, adding a nutrient solution, stabilizing for several periods, replacing an anaerobic sludge matrix in an anode chamber with the aged landfill leachate, and finally preparing the aged landfill leachate in the single-chamber MFC. The MFC is operated at room temperature and constant pressure, organic pollutants and ammonia nitrogen in the aged landfill leachate can be removed, and meanwhile electric energy can be recycled. The method is simple in equipment, convenient to operate, energy-saving and free of secondary pollution. When the anode catalyst is Co3O4 / Ni-MOF, the maximum power density of the single-chamber MFC reaches 882 mW / m < 2 >, the maximum output voltage is 524 mV, the COD removal rate can reach 35.3%, and the ammonia nitrogen removal rate can reach 48.5%.

This invention relates to a method for in-situ suppression of hydrogen sulfide generation using fermentation broth. The specific method includes: concentrating sludge from a municipal wastewater treatment plant to increase its solids content; treating anaerobic fermentation broth from an anaerobic sludge treatment tank to remove SCFAs and soluble phosphorus, then storing it for later use; mixing the concentrated sludge with the treated fermentation broth in a certain proportion; pretreating the sludge substrate by controlling pH and temperature; and finally, anaerobic treating the sludge, maintaining stable continuous flow operation of the reactor by controlling the sludge retention time. Results show that this treatment method can significantly suppress hydrogen sulfide generation during anaerobic sludge treatment. Through a simple, inexpensive, and effective operation, utilizing wastewater treatment plant byproducts, this method achieves waste-to-waste treatment, reducing the generation of toxic and harmful gases such as hydrogen sulfide during anaerobic sludge treatment, which is of great significance for sludge treatment and disposal.

The embodiment of the invention provides a sewage treatment method based on a UASB (Upflow Anaerobic Sludge Blanket) reactor, which comprises the following steps: a stable preparation step: continuously feeding sewage with a first COD (Chemical Oxygen Demand) concentration into the UASB reactor through a water inlet at a fixed flow speed, so that the activity of microorganisms containing anaerobic digestion sludge in the UASB reactor reaches a stable state; a high-low alternate load water inlet step: adjusting a peristaltic pump in the UASB reactor system, so that the sewage with the first COD concentration continuously enters the UASB reactor through a water inlet at a periodically high-low changing flow rate; a load increasing step: sewage continuously flows into the UASB reactor through a water inlet at a fixed flow speed, the COD concentration of the sewage flowing into the UASB reactor is increased by taking the first COD concentration as an initial concentration gradient along with time until the maximum critical value of the COD concentration of the sewage treated by the UASB reactor is reached, and the load is increased; compared with the UASB reactor in the prior art, the UASB reactor cultured through the high-low alternate load water inlet step in the method has the advantage that the performance is more excellent.

The utility model relates to the technical field of sewage treatment, and discloses a high-concentration wine brewing wastewater treatment system which comprises a hydrolysis acidification tank, a primary anaerobic tank, a secondary anaerobic tank and a vertical flow sedimentation tank which are sequentially connected through a sewage pipeline, the system further comprises a biogas collection and storage device, the biogas collection and storage device is movably arranged at the top of the second-stage anaerobic tank, and the first-stage anaerobic tank and the second-stage anaerobic tank are communicated with the biogas collection and storage device through biogas pipelines respectively. The vertical flow sedimentation tank is also communicated with an anaerobic sludge return pipeline; and the anaerobic sludge return pipeline is communicated with the first-stage anaerobic jar and the second-stage anaerobic jar. According to the system disclosed by the utility model, the impact of acid wine-making wastewater on anaerobic sludge can be avoided; the first-stage anaerobic tank and the second-stage anaerobic tank are adopted for anaerobic fermentation, the degradation efficiency of high-concentration organic matter is improved, the vertical flow sedimentation tank is arranged behind the second-stage anaerobic tank, anaerobic sludge is settled, part of anaerobic sludge flows back, anaerobic sludge loss is avoided, a biogas cabinet does not need to be independently arranged for storage, and the occupied space is saved.

The present invention discloses a method for promoting membrane fouling resistance of an anaerobic membrane bioreactor under the action of an electric field and its application, belonging to the technical field of in-situ control of membrane fouling. In the process of treating sewage, the present invention adopts a Ni / Fe LDH@C-BIO hybrid synthesized by coprecipitation and electrostatic attraction to prepare an anaerobic membrane bioreactor, and performs an electrochemical redox reaction under the action of an external electric field to achieve membrane fouling resistance. The Ni / Fe LDH@C-BIO hybrid used in the anti-membrane fouling method has a large amount of positive charge on its surface and can quickly hybridize with anaerobic sludge with a negative charge on its surface. The external electric field promotes the regulation of the electrical activity of the anaerobic sludge EPS, decomposes the main pollutants that cause membrane clogging, and alleviates the deposition of microbial flocs and their metabolites. At the same time, the LDH with acidified activated carbon as a conductive substrate has excellent specific surface area catalytic performance and conductive performance, accelerates electron transfer, thereby further improving the reaction rate and effectively improving the anti-fouling ability and membrane permeability of the membrane assembly of the anaerobic membrane bioreactor.

The present invention discloses a simple anaerobic bioreactor, which relates to the field of environmental bioengineering technology, including a cover plate, a reaction chamber, a water inlet pipe, a fixed chamber, a sealing cover, a fixed pipe, and a nozzle; a suction chamber coaxially connected to the lower end surface of the sealing cover, the lower end of the suction chamber slidingly passes through the bottom of the fixed chamber, and a suction unit is provided in the suction chamber. When the suction chamber rotates, the suction unit is alternately connected with a plurality of the fixed pipes, and generates a suction force on the inside of the fixed pipes connected thereto. In the present invention, by providing a suction unit, the leachate and impurities inside the plurality of nozzles and the fixed pipes can be alternately sucked, so that the nozzles will not be blocked, and then the sucked leachate and impurities can fall into the anaerobic sludge in the reaction chamber through the suction chamber, avoiding the phenomenon of large differences in local spraying volume caused by the blockage of several nozzles.