118 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 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 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 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 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 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.

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 invention relates to the technical field of wastewater treatment, in particular to an anaerobic granular sludge preparation method and a wastewater treatment method.The method comprises the steps that hydrophilic-hydrophobic core-shell quantum dots are provided; mixing the quantum dot with anaerobic sludge and carrying out dark-state culture to obtain a quantum dot-sludge inoculant; putting into a reactor, and arranging a near-infrared light source with matched wavelength; and starting water feeding, executing gradient domestication in a light environment, firstly increasing the antibiotic concentration to a first target value, and then increasing the organic load to a second target value to obtain target granular sludge. According to the method, near-infrared light is utilized to excite the quantum dots, in-situ photocatalytic degradation of antibiotics and electron transfer across a sludge hydrophobic barrier are synchronously achieved, the prepared anaerobic granular sludge has efficient poison resistance, high metabolic activity and structural stability, and the sewage treatment efficiency and the system operation stability are effectively improved.

A device and method for treating urban domestic sewage based on a two-stage combined process of partial denitrification-anammox belong to the field of biological sewage treatment. The device includes a raw water tank, a sequencing batch biofilm reactor (SBBR), an intermediate water tank, an up-flow anaerobic sludge bed (UASB) and a water outlet tank. A part of urban domestic sewage enters the SBBR and is mixed with residual sewage in the last cycle, a partial denitrification-anammox reaction is carried out under a stirring condition to remove nitrate nitrogen and a part of ammonia nitrogen, followed by a nitrification under an aeration condition to completely convert ammonia nitrogen into nitrate nitrogen, and effluent enters the intermediate water tank; and the other part of the urban domestic sewage is mixed with the effluent of the SBBR and continuously enters the UASB, and nitrite nitrogen, which is generated by nitrate nitrogen reduction, and ammonia nitrogen, are removed by means of anammox. According to the present invention, with no need of adding an external carbon source, organic matters in sewage can be effectively removed, the nitrogen removal efficiency of urban domestic sewage is improved, and efficient and low-consumption nitrogen removal is realized.

The utility model provides a sewage treatment device based on a UASB (Upflow Anaerobic Sludge Blanket) process, which relates to sewage treatment equipment and comprises a tank body, a reaction area, an electric biological treatment area and a settling area are sequentially arranged from the bottom to the top of the tank body, and the reaction area is communicated with the settling area through the electric biological treatment area; a granular sludge bed is arranged in the reaction area; the electro-biological treatment area is provided with a first electrode and a second electrode, and the first electrode and the second electrode are connected with a variable-frequency power supply through wires; periodically reversing the variable-frequency power supply; a water inlet pipe is arranged at the bottom of the tank body and is communicated with the reaction area; a water outlet pipe is arranged at the top of the tank body and is communicated with the settling area. Organic matters are decomposed through microorganisms on the granular sludge bed and converted into biogas, and an alternating-current electric field is generated through the first electrode, the second electrode and the variable-frequency power supply; in the electro-biological treatment area, denitrifying bacteria utilize organic matters as electron donors to reduce nitrate into nitrogen, so that denitrification is realized; meanwhile, the bacteria with the phosphorus removal function absorb and release phosphorus under the action of the electric field, and phosphorus removal is achieved.

This invention relates to the field of waste sludge treatment technology, specifically to an in-situ resource utilization method for a microbial-algae system and its application. The in-situ resource utilization method for the microbial-algae system includes: placing waste sludge, microalgae, and sodium sulfite in an anaerobic fermentation reactor, then adjusting the pH of the mixture and fermenting under anaerobic conditions; wherein the microalgae include at least one of the phyla of green algae, cyanobacteria, and diatoms; and no anaerobic sludge is added to the anaerobic fermentation reactor. This method can effectively utilize the microbial-algae system to increase the yield of volatile fatty acids during anaerobic fermentation in situ, and can also reduce the yield of waste sludge in situ, thereby lowering the subsequent disposal costs of sludge and microalgae in the secondary sedimentation tank.

The invention discloses a sewage treatment method capable of reducing sludge production, which comprises the following steps: S1, sewage firstly enters an anaerobic hydrolysis reactor for hydrolytic acidification, and then the sewage enters an anaerobic sludge interception reactor; s2, carrying out nitrogen and phosphorus removal and organic matter degradation on the water treated in the step S1; s3, the water body subjected to biochemical treatment in the step S2 enters a secondary sedimentation tank, and solid-liquid separation is completed; s4, residual sludge discharged from the secondary sedimentation tank and the anaerobic sludge interception reactor is collected in a sludge tank and then enters a sludge concentration tank, and the water content of the sludge is reduced; s5, the concentrated sludge enters a special aerobic starvation reactor; s6, dehydrating equipment is used, and the treated mud cakes are made into dry and hard mud cakes. According to the method, the sludge yield is reduced from the source, and the potential pressure on the environment is fundamentally relieved; no harmful chemical agent is added in the process, so that secondary pollution is avoided; the reduced sludge is more stable, and favorable conditions are created for subsequent safe resource utilization.

The invention discloses a perfluorinated compound removal system and method based on a membrane bio-membrane reactor, and belongs to the technical field of sewage treatment and recycling. Wastewater containing perfluorinated compounds is introduced into a membrane aeration bio-membrane reactor inoculated with anaerobic sludge in a sequencing batch or continuous manner, and hydrogen is introduced into a hollow fiber membrane. The method comprises the following steps: firstly, aerating inlet water to enable dissolved oxygen to be lower than 0.05 mg / L, and adjusting the pH to be 6.5-7.5; meanwhile, the hydrogen supply pressure is adjusted, electron donors are provided for reduction of perfluorinated compounds, and a stable hydrogen matrix membrane biological membrane is formed on the surface of the hollow fiber membrane. The sequencing batch reaction mode and the continuous flow reaction mode both can achieve more than 99% of pollutant conversion, and achieve more than 20% of biological defluorination rate for the first time. The biological membrane does not need to be externally added with an organic carbon source, efficient biological reduction defluorination is directly carried out through hydrogen and microorganisms, and the biological membrane has the advantages of being low in energy consumption, green, free of secondary pollution and the like.

The utility model relates to the technical field of anaerobic sludge bed reactors, in particular to an up-flow anaerobic sludge bed reactor for anaerobic granular sludge, which comprises a reaction box, a raw water inlet pipe is connected to the bottom of the outer side of the reaction box, a water inlet valve is mounted at the middle section of the raw water inlet pipe, a sludge bed is filled at the bottom of the inner side of the reaction box, and a water outlet valve is mounted at the bottom of the reaction box. A sludge bed is arranged in the reaction box, a three-phase separator is arranged in the reaction box and above the sludge bed, biogas discharge pipes are arranged on the left side and the right side of the top of the reaction box, and rotary motors are symmetrically arranged on the left side and the right side of the top of the reaction box. Each group of biogas discharge pipes is provided with a cleaning box structure capable of cleaning the inner wall, so that the problem of unsmooth biogas discharge caused by floating sludge caking in the biogas discharge pipes is effectively avoided, one group of biogas discharge pipes can be always kept to operate normally during cleaning, and the overall reaction efficiency is not influenced.

The invention provides a method for improving the anaerobic fermentation acid production effect of oxytetracycline-containing sludge by using thiosulfate pretreatment, which comprises the following steps: adding anaerobic sludge of a sewage plant into a fermentation tank as inoculated sludge, adding oxytetracycline and thiosulfate, then blowing nitrogen to drive oxygen, sealing the fermentation tank to degrade oxytetracycline through constant-temperature anaerobic fermentation, and carrying out centrifugal separation to obtain the oxytetracycline-containing sludge. The supernatant is fermentation liquor rich in volatile fatty acid; wherein the total suspended solid concentration of the inoculated sludge is 20-27 g / L, the mass concentration of the thiosulfate in the sludge is 900 mgS / L in terms of S, and the adding concentration of the oxytetracycline is 5-25 mg / L. According to the method, sludge hydrolysis is promoted, a microbial community structure is adjusted and electron transfer is accelerated by utilizing the reducibility of thiosulfate, so that the conversion rate of organic matters to VFA is increased, oxytetracycline is synchronously and efficiently removed, and a new solution is provided for antibiotic pollution control and sludge resource utilization.

The application relates to an anaerobic reactor mixed water distribution device, belonging to the technical field of anaerobic reactor mixed water distribution devices, which comprises an outer shell, an inner shell fixed on the inner bottom wall of the outer shell, a water inlet mechanism arranged on the outer shell, an auxiliary mechanism arranged on the outer shell, and a water outlet pipe fixed on the left side of the outer shell. The water inlet mechanism comprises multiple spray pipes fixed on the outer circumferential wall of the outer shell, multiple collection pipes fixed on the outer circumferential wall of the inner shell, a suction chamber fixed on one end of each collection pipe close to the spray pipe, a connecting chamber fixed on the end of each collection pipe away from the suction chamber, and a water spraying pipe rotationally connected to one side of the connecting chamber away from the collection pipe. The anaerobic reactor mixed water distribution device has the advantages that sewage is sprayed into the inner part of the outer shell through the water inlet mechanism, a negative pressure suction force is generated during spraying, anaerobic sludge can be sucked into the inner part of the inner shell to form a cyclone, the mass transfer effect of the anaerobic reaction is strengthened, sludge accumulation, calcification and hardening are avoided, and the reaction efficiency is higher.

The invention discloses a method for treating metformin-containing wastewater by using anaerobes, and belongs to the field of sewage treatment. According to the method, an anaerobic membrane reaction device is used for domesticating anaerobic sludge, and a functional flora capable of degrading metformin is obtained. A water outlet and an exhaust port are formed in the top of the device main body, and a water inlet and a sludge discharge port are formed below the side wall of the device main body; the inner cavity is provided with a stirring device, and the outer cavity is a water bath layer. Sewage containing metformin is introduced into a device for inoculating anaerobic sludge, and the input of an external carbon source is gradually reduced, so that microorganisms are directionally enriched by taking metformin as a unique carbon source, and the variety and abundance of the microorganisms are remarkably improved. After domestication, the device continuously treats wastewater, under the condition that the inflow concentration is 21 mg / L of metformin, the degradation rate reaches 80%, the treatment capacity and effect are greatly enhanced, stable treatment of high-concentration metformin can be achieved without additional carbon sources in the later period, and the cost is reduced.

The invention is suitable for the technical field of wastewater treatment, and provides a treatment method of p-tert-butylbenzoic acid production wastewater, which comprises the following steps: S1, pretreatment: carrying out oxidation treatment on the wastewater by adopting a Fenton oxidation method, reacting under the optimal pH condition, carrying out neutralization coagulation and precipitation in a lime milk and NaOH combined manner, and separating generated iron mud; s2, anaerobic biological treatment: introducing the wastewater pretreated in the step S1 into an up-flow anaerobic sludge blanket reactor, and dynamically adjusting the water inlet load of an up-flow anaerobic sludge blanket through an intelligent control system. According to the scheme, a multi-dimensional evaluation model of wastewater characteristics and system treatment capacity is established, and key parameters such as an initial pH value, inhibitor concentration, sludge granulation degree and biogas yield are brought into a unified calculation framework, so that collaborative optimization control of water inlet load is realized.

The invention discloses a PTFE anion exchange membrane-based biological fuel cell, which comprises an anode chamber, a cathode chamber, an anion exchange membrane and an external circuit system, the anion exchange membrane is a PTFE membrane grafted with quaternary ammonium groups and is arranged between the anode chamber and the cathode chamber, the anode chamber is internally provided with an anode, an anolyte and anaerobic sludge, the anode is attached with anaerobic electrogenesis microorganisms, and the cathode chamber is provided with an anode and an anode liquid. The anaerobic electrogenesis microorganisms decompose organic matters in the anode chamber and generate H < + >, CO2 and electrons; a cathode, a salt buffer solution and O2 are arranged in the cathode chamber, the cathode is conductively connected with the anode through an external circuit system, and OH <-> in the cathode chamber is transferred into the anode chamber through the anion exchange membrane. The biological fuel cell provided by the invention adopts the PTFE membrane grafted with quaternary ammonium groups as the anion exchange membrane, so that OH <-> in the cathode chamber is transferred into the anode chamber through the anion exchange membrane to maintain pH balance of the anode chamber, reduce ion deposition on the surface of the cathode and reduce charge transfer resistance, thereby obtaining higher power density and coulombic efficiency.

The utility model discloses a three-phase separator mounting structure for a UASB (Upflow Anaerobic Sludge Blanket) reactor, and relates to the technical field of three-phase separators, the three-phase separator mounting structure comprises a device body, the bottom of the device body is provided with a transverse chute, the transverse chute is internally connected with a transverse sliding rod in a sliding manner, the upper part of the transverse sliding rod is rotatably connected with a first screw rod, and the outer side of the first screw rod is sleeved with two transverse sliding blocks in a threaded manner; the transverse sliding block is fixedly connected to the inner wall of the transverse sliding groove, an adjusting assembly is arranged on the upper portion of the device body, and a placing assembly is arranged on the upper portion of the adjusting assembly. In this way, the position of the device body can be transversely adjusted according to the mounting position of the three-phase separator for the UASB reactor, so that the placement assembly and the three-phase separator for the UASB reactor can be stably butted, and the use convenience and practicability of the mounting structure for the three-phase separator for the UASB reactor are effectively improved.

The present application relates to the technical fields of anaerobic biological toxicity experiment, and discloses an automatic sample feeding device for industrial wastewater anaerobic biological toxicity evaluation, which comprises a conical flask for temporarily storing anaerobic sludge samples and nutrient solution, and further comprises: a storage box, which is internally provided with a storage space for storing anaerobic sludge samples and nutrient solution; a gas storage tank, which is arranged on the side surface of the storage box and internally filled with high-pressure nitrogen; a nitrogen gas conveying assembly, which is arranged on the gas storage tank and penetrates and extends to the inside of the storage box, and is used for aerating the anaerobic sludge samples in the storage box and realizing sludge homogenization through stirring; and a sample feeding assembly, which is arranged on the storage box and communicates with the storage box, wherein the sample feeding assembly is provided with two sample feeding assemblies for respectively feeding anaerobic sludge samples and nutrient solution into the conical flask. The automatic sample feeding device and method for industrial wastewater anaerobic biological toxicity evaluation aim to simplify the exhaust process, reduce the contact between microorganisms and air, and improve the experimental efficiency and result accuracy.

The invention belongs to the technical field of solid waste resource utilization and biological fermentation, and particularly relates to a method for rapidly producing hexanoic acid from kitchen waste in a one-tank mode through aerobic pretreatment. The method comprises the following steps: firstly inoculating yeast for making hard liquor and red yeast rice into kitchen slurry for aerobic pretreatment, and then inoculating flora which is formed by mixing anaerobic sludge, vinasse and forest land soil and is subjected to enrichment treatment for anaerobic fermentation to generate caproic acid. According to the method, micro-aerobic pretreatment and anaerobic fermentation are combined to construct a fungus-bacterium synergistic fermentation system, so that the problems that electron donors depend on exogenous addition, the hydrolytic acidification efficiency is low, flora enrichment is difficult, the process is complicated and the like in the existing process of producing caproic acid from kitchen waste are solved, endogenous electron donors are efficiently generated, the caproic acid yield is optimized, and the method is suitable for industrial production. The production period is obviously shortened, and efficient resource utilization is realized.

The present application belongs to the technical field of organic waste anaerobic fermentation, and discloses a method for producing medium-chain fatty acids by using blue vitriol to promote residual sludge anaerobic fermentation, which uses residual activated sludge from a municipal sewage treatment plant as a fermentation substrate, inoculates anaerobic sludge, adds blue vitriol and a methanogenesis inhibitor, adjusts pH value, and carries out anaerobic fermentation to produce medium-chain fatty acids under the participation of an electron donor; due to the addition of blue vitriol, the electron transfer capacity of microorganisms in the carbon chain extension process can be strengthened, thereby improving the yield of medium-chain fatty acids in the fermentation product; the addition amount of blue vitriol in the system is 2-20 g / L. By introducing blue vitriol into the sludge medium-chain fatty acid production system and strictly controlling the addition amount of blue vitriol in the system, the present application uses blue vitriol as an electron mediator to strengthen the electron transfer efficiency of microbial fermentation in the sludge medium-chain fatty acid production process, thereby improving the yield of medium-chain fatty acids, and further realizing efficient utilization of sludge resources.

The invention discloses a method for treating sulfamethoxazole wastewater by using an anaerobic membrane bioreactor. The method comprises the following steps: utilizing an anaerobic membrane bioreactor, externally connecting an air pump to maintain sufficient mixing of sludge and water, internally arranging a flat membrane component, inoculating anaerobic sludge into the reactor, pumping SMX wastewater from the bottom of the reactor, and upwards flowing through the reactor under an anaerobic condition, organic matters in the wastewater are jointly degraded through anaerobic metabolism of microorganisms and adsorption of a biological membrane, and a carbon-sulfur conversion reaction is carried out, so that COD (Chemical Oxygen Demand), sulfate and SMX in the wastewater are efficiently removed. The method is simple and convenient to operate, controllable in process and suitable for treatment of SMX wastewater with different concentrations, and a feasible technical scheme is provided for industrial treatment of antibiotic wastewater.

This invention discloses a microbial fuel cell reactor device resembling an anaerobic / aerobic membrane bioreactor. The device includes an influent system, an effluent system, a main body of the microbial fuel cell reactor, and an energy data acquisition system. The main body of the microbial fuel cell reactor internally comprises an anaerobic anode reaction chamber, an intermediate baffle zone, and an aerobic cathode reaction chamber. The anaerobic anode reaction chamber operates in a plug-flow mode and contains anaerobic sludge and carbon brushes. The intermediate baffle zone isolates the anaerobic anode reaction chamber from the aerobic cathode reaction chamber via left and right plates, respectively, and uses pebbles at the bottom to replace the function of the semi-permeable membrane in traditional microbial fuel cells. The aerobic cathode reaction chamber employs a suspended-rotating biocathode and incorporates a hollow fiber membrane module, operating in a completely mixed mode. This invention has the advantages of low cost, simple and easily scalable structure, strong long-term operational stability, high power generation efficiency, and strong wastewater treatment capacity.

The utility model discloses a reverse-flow anaerobic fluidized bed reactor, and relates to an anaerobic reactor for treating domestic sewage. The utility model relates to a reverse-flow anaerobic fluidized bed reactor, in particular to a reverse-flow anaerobic fluidized bed reactor, which aims to solve the technical problems of sludge loss, long hydraulic retention time and poor treatment effect in domestic sewage treatment by an existing anaerobic method. The reverse-flow anaerobic fluidized bed reactor comprises a tank body, a water inlet pump and a reflux pump, a water distribution device, a rectifying device and a three-phase separator are arranged in the tank body, an overflow weir is arranged at the top of the tank body, a water inlet is formed in the middle section of the side wall of the tank body, a water outlet is formed in the bottom, a water inlet pump is connected with the water inlet, and the water outlet is connected with the water inlet through a reflux pump. Secondary sedimentation tank anaerobic sludge is added into the tank body, domestic sewage is input, the domestic sewage and the sludge flow back to the water outlet downwards, and a water body is extruded to be separated upwards and is discharged in an overflowing mode. The COD (Chemical Oxygen Demand) of the effluent can reach below 50mg The method can be used in the domestic sewage treatment field.

The invention discloses a dry-type anaerobic sludge external reflux device which comprises a dry-type anaerobic tank, an extrusion pretreatment unit, a filtrate temporary storage unit, a fine screening unit, a targeted flocculation unit, a centrifugal separation unit, a returned sludge conveying unit with a double-plunger pump for standby, and a raw material TS adjusting unit, the invention also discloses a reflux process of the dry anaerobic sludge external reflux device. The reflux process comprises the following steps: adjusting a raw material TS to 25-30%, removing impurities greater than or equal to 5 mm and 1-5 mm in a grading manner, adding PMA according to a sludge-chemical ratio of 7: 1 for targeted flocculation, centrifugally preserving breeds according to a separation factor of 3000-4000, dynamically adjusting the sludge return amount by 30-50%, and recycling dry sludge to realize system optimization. According to the method, the feeding load can be increased to the design value 125%, the front-end VFA is smaller than or equal to 10000 mg / L for a long time, the acidification risk is smaller than or equal to 1% / month, the sludge return pipeline is not blocked, the operation cost is low, the method is suitable for various types of high inherent waste, and remarkable technical, economic and environmental benefits are achieved.