184 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 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 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 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 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 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 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 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 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 invention discloses an anaerobic ammonia oxidation float sludge recycling method based on ultrasonic assisted respiration. The anaerobic ammonia oxidation float sludge recycling method comprises the following steps: assisted respiration: taking anaerobic ammonia oxidation float sludge in a three-phase separator of a UASB (Upflow Anaerobic Sludge Blanket) reactor, and putting the anaerobic ammonia oxidation float sludge into a nutrient solution for low-intensity ultrasonic treatment; after the low-intensity ultrasonic treatment is finished, if the float sludge can be completely settled within 5 minutes, a sludge recycling step is carried out, otherwise, the float sludge continues to be subjected to low-intensity ultrasonic treatment in the nutrient solution; sludge recycling: inoculating the settled sludge subjected to low-intensity ultrasonic treatment into a reactor, and when nitrite nitrogen in effluent is gradually reduced to 20 mg L <-1 > or below, increasing the nitrogen load of the inlet water of the reactor; and when the floating rate of the sludge in the reactor reaches 20% or above or the nitrogen removal load per unit volume of the reactor cannot be increased within 5 days, repeating the steps of assisted respiration and sludge reuse until the reactor reaches the required nitrogen removal load per unit volume.

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.

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.