544 results about "Membrane bioreactor" patented technology

The invention relates to the technical field of membrane bioreactors, and discloses an integrated sewage treatment membrane bioreactor and a sewage treatment method. The reactor comprises a treatment pond, a pretreatment unit and a membrane treatment unit are arranged in the treatment pond, the membrane treatment unit comprises a support, a pump body is fixedly installed at the top of the treatment pond, a channel is formed in the support, and the extraction end of the pump body is communicated with the channel through an extraction pipe. According to the invention, the root of a membrane filament can be clamped by a pair of moving clamping plates after the membrane filament is broken, so that the membrane filament is closed after being broken, sewage is prevented from entering the membrane filament without being filtered by filter holes and polluting the whole membrane treatment unit, the clamping plates can be protected, impurities are prevented from being accumulated on the surfaces of the clamping plates, and the service life of the membrane treatment unit is prolonged. And protection on the clamping plates can be cancelled during use, so that the clean clamping plates are exposed outside, the subsequent clamping plates cannot be influenced by impurities when clamping and sealing membrane filaments, and the sealing effect on the membrane filaments is better.

The invention discloses a system and a method for classified sewage treatment, and belongs to the technical field of environmental engineering and water treatment. The system comprises the following components: an intelligent water quality detection module, which is used for real-time and accurate monitoring of COD, BOD, ammonia nitrogen, total phosphorus, suspended matter concentration and heavy metal content; the sectional bioreactor realizes deep removal of nitrogen and phosphorus and efficient biological treatment by flexibly adjusting reaction conditions of each section; the intelligent flocculation control module is used for automatically and accurately adjusting the adding amount of a flocculating agent, and is combined with integrated operation of efficient inclined tube precipitation and sludge concentration, so that the water quality of discharged water is stable, and the medicament consumption is reduced; the ultrafiltration membrane bioreactor effectively removes residual suspended matters and colloids, and ensures that the effluent stably reaches the standard for a long time through the synergistic effect of catalytic ozonation; and the sludge treatment module is used for realizing collaborative optimization management of sludge reduction, recycling and energy recycling.

The invention discloses a printing and dyeing wastewater advanced treatment and salt control recycling process and system, and belongs to the technical field of wastewater treatment. According to the process, the printing and dyeing wastewater is sequentially subjected to pretreatment of grating interception, adjustment and homogenization, and coagulating sedimentation; carrying out hydrolytic acidification and biochemical treatment in a membrane bioreactor; softening treatment of ozone oxidation complex breaking and fluidization crystallization softening; carrying out nanofiltration separation to obtain a permeate and a concentrated solution; carrying out seed crystal fluidization descaling on the concentrated solution; respectively carrying out membrane concentration on the nanofiltration permeate and the descaled concentrated solution through reverse osmosis to obtain sodium chloride and sodium sulfate concentrated solutions; and finally, carrying out evaporation curing treatment on the sludge and the crystallized waste residues. Through multi-step cooperative treatment, deep purification of the printing and dyeing wastewater and efficient separation and recycling of salt are realized, and the problems of impure nanofiltration salt separation and high system scaling risk in the prior art are solved.

The invention discloses a double-layer aeration system for preventing wire breakage and sludge deposition of an MBR double-layer component membrane pool, which comprises a raw water pool, a raw water inlet peristaltic pump, an MBR double-layer component membrane pool, a perforated aeration pipe, a pulse aeration box, an aeration pump, a gas meter, a water outlet gear pump, an ultrafiltration membrane component, a pressure sensor, a transmembrane pressure difference display, a sludge discharge peristaltic pump and a water outlet pool, the MBR double-layer assembly membrane pool comprises a first MBR membrane assembly and a second MBR membrane assembly, the first MBR membrane assembly and the second MBR membrane assembly are arranged in parallel, and the perforated aeration pipe and the pulse aeration box are configured to be used as aeration assemblies of the first MBR membrane assembly and the second MBR membrane assembly. According to the invention, the membrane is physically scrubbed by utilizing different aeration modes and a double-layer aeration mode, so that the phenomena of membrane pollution, sludge accumulation and wire breakage are effectively relieved, a reliable theoretical basis is provided for transforming an MBR membrane tank into a double-layer aeration mode in a water purification plant using the MBR hollow fiber membrane, and meanwhile, the method has important significance on reducing pollution and carbon.

The utility model discloses an MBR (Membrane Biological Reactor), and particularly relates to the technical field of sewage treatment, the MBR comprises an outer shell and a plurality of membrane components arranged in the outer shell, the outer top surface of the outer shell is connected with a plurality of movable rods in a sliding manner, the movable rods and the membrane components are arranged in a staggered manner, one part of each movable rod is positioned in the outer shell, and the other part of each movable rod is positioned in the outer shell. And the other part of the movable rod is positioned outside the outer shell. According to the MBR disclosed by the utility model, in actual work, a first motor drives an eccentric wheel to rotate, so that a connecting plate and a plurality of movable rods are pushed to descend, namely a first spring is extruded, when the movable rods descend, a fixed plate can be pushed to descend, and along with continuous rotation of the eccentric wheel, the fixed plate reciprocates up and down; the brush plate can wipe impurities attached to the membrane module, and the cleaned impurities fall to the top surface of the baffle plate, so that the impurities attached to the membrane module can be conveniently cleaned, and the situation that the filtering efficiency is reduced due to the attached impurities is avoided.

The invention discloses a membrane bioreactor for treating printing and dyeing wastewater, which comprises a membrane bioreactor for treating printing and dyeing wastewater. Comprising a reaction tank, a bracket horizontally arranged in the reaction tank, a plurality of membrane assemblies distributed on the bracket side by side, four baffles supported in the reaction tank and an aeration pipe extending to the lower part of the bracket, the four baffles are arranged on the peripheral sides of the membrane assemblies in a surrounding manner, and the aeration pipe is used for aerating towards the membrane assemblies; generated bubbles act on membranes of the membrane assembly, circulating flow flows upwards along the outer sides of the four baffles under the blocking action of the outer sides of the four baffles, a small part of flow descending area exists on the upper portions of the inner sides of the four baffles, gas phase distribution is widened through the four baffles, and the gas gathering phenomenon is relieved. According to the membrane bioreactor provided by the utility model, a gas phase generated by the aeration effect is uniformly distributed among the membranes, and the surface stress of the membranes is more uniform, so that the aeration efficiency of the membrane bioreactor is improved, and the operation energy consumption of the membrane bioreactor is further reduced.

The invention discloses a membrane bioreactor membrane pollution prediction method and system, and relates to the technical field of pollution detection. The method comprises the following steps: setting a frequency detection strategy, and connecting a membrane bioreactor to obtain a membrane feedback signal based on the frequency detection strategy; performing feedback signal fluctuation time sequence characteristic analysis based on the membrane feedback signal to obtain a feedback signal characteristic; the feedback signal features are combined with reactor operation parameters to be imported into a mechanism hybrid prediction model, mechanism constraint is carried out through a mechanism constraint layer according to the feedback signal features, data analysis is carried out on time series data features on the basis of the mechanism constraint through a data driving prediction layer, and a membrane state prediction result is obtained; and performing membrane pollution state analysis and progress prediction according to the membrane state prediction result, and generating a membrane pollution prediction data chain. The technical problems that in the prior art, membrane pollution prediction depends on an empirical threshold, so that recognition lags and precision is insufficient are solved, and the technical effect of improving membrane pollution prediction accuracy and real-time performance is achieved.

The utility model discloses an MABR (Membrane Aerated Baffled Reactor) membrane aeration reaction system capable of adaptively adjusting the thickness of a biological membrane layer, which comprises an MABR membrane bioreactor, a membrane pool and a guide rail, and the MABR membrane bioreactor is movably limited on the guide rail; the MABR membrane bioreactor comprises a membrane frame and a membrane assembly, the upper end of the membrane frame is provided with an MABR membrane gas inlet, an MABR membrane tail gas outlet, an aeration gas inlet and a fixing pin, the fixing pin is connected with a valve of an aeration gas inlet valve through a control connecting rod, the membrane frame is further provided with limiting claws and a pulse aeration box, the limiting claws are located on the two sides of the membrane frame, and the pulse aeration box is connected with the limiting claws. The guide rail is used for limiting the MABR on the guide rail and can freely float up and down on the guide rail; the pulse aeration box is positioned below the MABR membrane component and is used for pulse aeration. According to the utility model, the pulse aeration and the MABR technology are combined, the MABR can automatically sink and float up and down under the action of self gravity and buoyancy of the MABR, the thickness of the MABR biological membrane layer is further adaptively controlled, and the device is energy-saving, efficient and free of manual operation.

The invention relates to a biological membrane sewage treatment method and device based on aeration on-off time intelligent regulation and control. The method comprises the following steps: sewage pretreatment: adding a flocculating agent into sewage of a flocculation device, stirring by stages, standing and precipitating, settling and separating floc, and enabling supernatant obtained by separation to enter a membrane bioreactor through a first water outlet device; aeration treatment: adopting an intermittent aeration mode to carry out cycle aeration on the supernatant conveyed by the first water outlet device; membrane separation treatment: pumping the sewage subjected to aeration treatment into a second water outlet device from the membrane bioreactor under the negative pressure pumping action of a centrifugal pump so as to realize the separation of the sewage and pollutants, and regulating and controlling the aeration on-off time according to the composition characteristics of microbial communities in the process of performing aeration treatment in an intermittent aeration mode so as to realize the aeration treatment. The invention relates to a method for optimizing the relative abundance of part of phylum and reducing the accumulation of extracellular polymeric substances and soluble microbial products. The device comprises a flocculation device, a membrane bioreactor and a control unit.

The invention provides an intelligent sewage treatment HPB-MBR system and a control method. The sewage treatment device comprises a biochemical pool, a multi-stage rotational flow concentration mechanism and an MBR (Membrane Bioreactor) pool which are communicated in sequence, the biochemical tank comprises an anaerobic tank, an anoxic tank and an aerobic tank which are communicated in sequence. The multi-stage rotational flow concentration mechanism is communicated with the aerobic tank and comprises 2-3 stages of rotational flow concentration mechanisms which are connected in series. And the MBR tank is communicated with an overflow discharge hole of the first-stage cyclone concentrator. And the MBR tank is provided with a backflow pipeline and a drainage pipeline. And the return pipeline is communicated with the aerobic tank. The number of stages of the multi-stage rotational flow concentration mechanism is proper, so that sludge with relatively large specific gravity can be relatively thoroughly separated and flows back to the anoxic tank and / or the aerobic tank through the first reflux. Thus, the flow of the first reflux is relatively small, the concentration of sludge entering the MBR tank is low, the flow of the MBR tank for the second reflux is also small, the energy consumption is reduced, and the degree of influence of the second reflux on dissolved oxygen of the aerobic zone is reduced.

The utility model discloses an MOBR membrane bioreactor, which belongs to the technical field of MOBR membranes, and adopts the technical scheme that the MOBR membrane bioreactor comprises a shell, a shell cover is arranged at the top of the shell, an adjusting mechanism is arranged in the shell, and a membrane body is arranged in the shell; the adjusting mechanism comprises two limiting plates, an adjusting plate and a plurality of pull rods, the rear side of the adjusting plate makes contact with the rear side of the inner wall of the shell, the rear sides of the limiting plates are fixedly connected with the front side of the adjusting plate, the rear sides of the pull rods are fixedly connected with the front side of the adjusting plate, and the top of the adjusting plate is rotationally connected with a threaded column; the rear side of the top of the shell is fixedly connected with a fixing plate, and the problems that the sewage treatment effect of the MOBR membrane bioreactor is limited due to the fact that the area size of MOBR membranes arranged in most existing MOBR membrane bioreactors is inconvenient to adjust, and the use effect is affected due to the fact that stains on the surfaces of the MOBR membranes are inconvenient to clean are solved.

The invention belongs to the technical field of sewage treatment, particularly relates to an MBR (Membrane Biological Reactor) for deeply treating sewage in an urban sewage treatment plant, and provides the following scheme aiming at the problems that the sewage treatment process is interrupted, the cleaning is incomplete, aeration holes are blocked by dirt and the like in the existing membrane filter tube cleaning process. The sewage treatment device comprises a sewage tank, two treatment tanks are arranged in the sewage tank, fixed pipes are fixed in the two treatment tanks, the outer walls of the two fixed pipes are rotationally sleeved with two hollow rotating discs, and a plurality of membrane filter pipes are rotationally connected between the two hollow rotating discs located in the same treatment tank. The treatment tanks can be alternately used when the membrane filter tube is cleaned, sewage treatment can be continuously completed, the membrane filter tube can be cleaned, the inner wall of the membrane filter tube can be uniformly coated with a cleaning agent in the cleaning process, and the membrane filter tube is effectively cleaned.

The invention belongs to the field of membrane pollution control, and particularly relates to pseudomonas as well as a separation method and application thereof. The invention provides a pseudomonas, which is identified as Pseudomonas knackmussii HITSZ-Q1, is preserved in the Guangdong Microbiological Culture Collection Center, and has the preservation number of GDMCC (China General Microbiological Culture Collection Center) NO: 66162. The strain takes C6-HSL as the unique carbon source and nitrogen source, and the 16S rDNA sequence of the strain is as shown in SEQ ID NO. 1. The strain has a remarkable degradation capability on signal molecules such as C6-HSL, C8-HSL, 3-oxo-C12-HSL and the like, and the highest quenching rate can reach 98.9%. The strain and pseudomonas aeruginosa are co-cultured, so that the signal molecule concentration of the pseudomonas aeruginosa can be effectively reduced, and biofilm formation is inhibited. The strain is further prepared into a carrier in the form of immobilized pellets, the carrier is added into a membrane bioreactor, the operation cycle is prolonged from 6.5 days to 10.5 days, and the membrane pollution delay rate reaches up to 61.5%.

The invention discloses a membrane pollution state evaluation method, device and equipment of a membrane bioreactor and a medium, and relates to the technical field of membrane method water treatment.The membrane pollution state evaluation method comprises the steps that membrane pollution monitoring index data of the membrane bioreactor are periodically collected, and a periodic time sequence data set used for analyzing and evaluating membrane pollution changes is generated according to the membrane pollution monitoring index data; analyzing the membrane pollution monitoring index data in the periodic time sequence data set according to a preset pollution evaluation rule to determine an index evaluation value corresponding to a membrane pollution monitoring index in the membrane pollution monitoring index data; and determining the pollution state of the membrane bioreactor according to the index evaluation value. Therefore, by analyzing the membrane pollution monitoring data, the membrane pollution potential and state change are mastered, the membrane system operation condition adaptability is evaluated, the reversible membrane pollution degree change and the irreversible membrane pollution degree change are distinguished, special data processing and analysis software does not need to be developed, and the low cost and the reliability, stability and accuracy of the monitoring data are ensured.

The invention discloses an MBR membrane in-situ cleaning method which comprises the following steps: S1, hoisting an in-situ cleaning device above an MBR membrane frame, putting a positioning pin into a positioning groove of the MBR membrane frame, and inserting a limiting pin into a limiting hole of an MBR membrane frame limiting plate; s2, after the in-situ cleaning device and an MBR membrane frame are fixed, a water pump and a servo motor are started, the servo motor drives a lead screw to rotate, a movable platform moves downwards along with rotation of the lead screw, meanwhile, under the action of the water pump, cleaning water is conveyed to a cleaning assembly through a water distribution pipe, and an MBR membrane is subjected to high-pressure water washing through a cleaning head; s3, after cleaning is completed, the rotating direction of the servo motor is changed, the cleaning assembly is restored to the original position, the position of the in-situ cleaning device is moved, and the operation from S1 to S3 is repeated to clean other MBR membranes till all the MBR membranes are cleaned. According to the system, in-situ online cleaning can be carried out under the state that the system is not shut down and does not need to be disassembled, the cleaning efficiency is greatly improved, the labor intensity is reduced, meanwhile, the water consumption is reduced, and the energy consumption is reduced.

The utility model discloses an MBR (Membrane Bioreactor) membrane in-situ cleaning device and a membrane frame. The MBR membrane in-situ cleaning device comprises a main frame, a cleaning assembly and a mobile platform, the main frame is of a three-dimensional structure, a positioning polish rod and a lead screw are arranged on the main frame, the lead screw is connected with a servo motor, the positioning polish rod and the lead screw penetrate through the movable platform and are detachably fixed to the main frame, and the movable platform can freely move on the polish rod and the lead screw; the cleaning assembly comprises a cleaning head and a connecting rod, the cleaning head is of a hollow structure and is provided with a water spraying opening, the connecting rod is of a hollow structure, the cleaning head is communicated with the connecting rod, the movable platform is provided with a through hole, and the connecting rod can penetrate through the through hole and is connected with the water distribution pipe; one end of the water pump is connected with the water suction pipe, and the other end of the water pump is connected with the water distribution pipe. In-situ online cleaning can be carried out under the state that the system is not shut down and does not need to be disassembled, the cleaning efficiency is greatly improved, the labor intensity is reduced, meanwhile, the water consumption is reduced, and the energy consumption is reduced.

The invention provides an elastic microcarrier as well as a preparation method and application thereof, and belongs to the field of water, wastewater and sewage treatment, the elastic microcarrier comprises the following components in parts by mass: 50-75 parts of thermoplastic elastomer, 25-10 parts of diatomite, 10-5 parts of tourmaline and 15-10 parts of iron-carbon powder. The material has good elasticity, adsorbability, biocompatibility and electrochemical characteristics, and can form a microscopic primary battery effect. The elastic microcarrier is applied to sewage treatment with a membrane bioreactor, pollutants can be removed through physical adsorption, chemical action and biological enhancement, meanwhile, the surface of a membrane is kept clean in combination with flexible scraping, membrane pollution is remarkably slowed down, the running membrane flux is improved, and the service life of the membrane is prolonged. The mechanical damage of the traditional rigid filler to the membrane is avoided, and the service life of the membrane is prolonged. The preparation method of the elastic microcarrier is simple and easy to operate, the elastic microcarriers with uniform specifications can be prepared in batches, and the applicability is high.

The utility model relates to a sewage treatment device combining two-stage AO (Anaerobic Oxic) and MBR (Membrane Bio-Reactor) membrane technologies, which is characterized in that sewage to be treated in the sewage treatment device sequentially passes through a water inlet pipe, a first anoxic tank, a first aerobic tank, a second anoxic tank, a second aerobic tank, an MBR membrane tank and a water outlet pipe, and anoxic tank fillers are arranged in the first anoxic tank and the second anoxic tank; aerobic tank suspended fillers are arranged in the first aerobic tank and the second aerobic tank, an MBR membrane is arranged in the MBR membrane tank, the self-priming pump and the ultraviolet disinfection instrument are arranged in the equipment room, an MBR membrane tank water outlet pipe and an MBR membrane tank water outlet pipe are arranged on the wall of the equipment room, and the self-priming pump is arranged on a pipeline between the MBR membrane tank water outlet pipe and the MBR membrane tank water outlet pipe. The sewage treatment device disclosed by the utility model can be used for effectively treating sewage in village and town environment sensitive areas, expressway service areas, high-speed rail stations and other scenes, is a sewage treatment device integrating two-stage AO and MBR membrane technologies, and is good in sewage treatment effect and high in integration level.

The invention provides a BDO (1, 4-butanediol) wastewater treatment process with high sulfate content, which comprises the following steps: carrying out electrochemical oxidation treatment on BDO (1, 4-butanediol) wastewater with high sulfate content; introducing the obtained BDO wastewater into an anaerobic reaction device for anaerobic reaction to reduce sulfate ions into hydrogen sulfide and oxidize organic matters to reduce COD (Chemical Oxygen Demand); effluent sequentially flows back to the circulating desulfurization device and the air floatation device; carrying out aeration treatment in the circulating desulfurization device so as to oxidize hydrogen sulfide into elemental sulfur; elemental sulfur is recycled in the air flotation device, and part of effluent of the air flotation device and part of effluent of the anaerobic reaction device flow back to inlet water of the anaerobic reaction device; part of effluent of the air floatation device and part of effluent of the anaerobic reaction device are combined and then are sequentially introduced into an aerobic activated sludge tank with a membrane bioreactor and an ozone catalytic oxidation tank. Effluent can enter a subsequent ultrafiltration reverse osmosis membrane system to be purified, and water produced by the membrane system is recycled as reclaimed water.

The embodiment of the utility model provides a wastewater treatment device, and relates to the technical field of wastewater treatment. The device comprises a reactor, a filter and a liquid outlet pipe, a reaction cavity is formed in the reactor, a water inlet and an exhaust port are formed in the reaction cavity, and the reaction cavity is used for containing activated sludge reacting with wastewater; a filter cavity is formed in the filter, and a membrane assembly is arranged in the filter cavity and used for filtering reaction liquid obtained after the wastewater reacts with the activated sludge; the reaction cavity is provided with a liquid outlet, the filtering cavity is provided with a liquid inlet, and the liquid outlet pipe is connected between the liquid outlet and the liquid inlet. According to the wastewater treatment device provided by the embodiment of the invention, the reactor and the filter are independently arranged and are isolated from the reaction cavity of the reactor, so that most sludge and microorganisms are left in the reactor, the contact between the sludge and the filter membrane and the contact between the microorganisms and the filter membrane are effectively reduced, and the treatment efficiency of the membrane bioreactor is further ensured.

The invention relates to the field of composite ultrafiltration membranes, in particular to a GO / PVDF composite ultrafiltration membrane for MBR and a preparation method of the GO / PVDF composite ultrafiltration membrane. The GO / PVDF composite ultrafiltration membrane is prepared by adopting 18% of polyvinylidene fluoride as a membrane base material, 6% of polyvinylpyrrolidone as a pore-foaming agent, 0-2% of graphene oxide as a modifier and the balance of N, N-dimethylacetamide as a solvent through an impregnation phase inversion method. The GO with low mass fraction is added into the section of the membrane to form a large and thick finger-shaped pore structure, the filtration resistance of membrane pores is reduced, the filtration flux, hydrophilicity, permeability and interception performance of the membrane are improved, the method is simple to operate, the prepared finished product is excellent in performance, and the research and application expansion of a membrane modification technology are promoted.

The invention discloses integrated sewage treatment equipment, which relates to the technical field of sewage treatment and comprises an adjusting tank, a biodegradation tank, a membrane bioreactor, an aeration device and a backwashing unit. Wherein the regulating tank is used for preliminarily stirring sewage, the biodegradation tank is internally provided with an anaerobic zone, an anoxic zone and an aerobic zone, the membrane bioreactor is mounted in the aerobic zone, the aeration device provides oxygen for each zone and forms bubble disturbance on the membrane surface, and the backwashing unit is used for periodically cleaning a membrane component. According to the invention, integrated treatment of sewage is realized, the nitrogen and phosphorus removal efficiency is improved, and the risk of membrane pollution is reduced at the same time.

The utility model relates to AAO-MBR (anaerobic-anoxic-oxic-membrane bioreactor) integrated sewage treatment equipment, which combines an advanced AAO process with an MBR technology and realizes efficient treatment and purification of sewage. The equipment realizes the functions of organic matter degradation, biological nitrogen removal, biological phosphorus removal and the like through treatment stages of the anaerobic zone, the anoxic zone, the aerobic zone and the like. Particularly, the oxygen elimination area arranged at the tail end of the aerobic area effectively eliminates oxygen in the mixed liquid, and damage to the environment of the anoxic area is avoided. The application of the MBR membrane component realizes the efficient separation of mud and water, and the effluent quality is stable and reaches the discharge standard. The built-in corollary equipment area adopts a double-layer design, the upper-layer equipment area is provided with a clean water tank and an air blower, and the lower-layer equipment area is provided with various pumps and dosing devices, so that the space is fully utilized, and the equipment size and the occupied area are reduced. In addition, pipelines and valves of the water pumps are reasonably designed, so that the water production pump and the backwashing water pump can be used together, and the engineering investment and the operation cost are further reduced. The integrated sewage treatment equipment has the characteristics of compact structure, high integration level, stable and reliable treatment effect and the like, and is suitable for sewage treatment projects with different scales and treatment requirements.

The utility model discloses an aeration device of an MBR (Membrane Biological Reactor), which relates to the technical field of water treatment and comprises an aeration pipeline, one end of the aeration pipeline is fixedly connected with an air inlet pipe, the top of the aeration pipeline is fixedly connected with an air delivery pipe, and the top of the air delivery pipe is fixedly sleeved with a support plate. The center of the top of the supporting plate is movably sleeved with a connecting pipe. Through mutual cooperation of the supporting bottom plate, the supporting rod, the damping spring column, the pressing column, the connecting frame, the extrusion column, the mounting disc, the fixing frame and the conical baffle, the problems that the aeration head of the aeration device stops aeration into water, so that suspended impurities in the water fall under the influence of gravity, and the falling suspended impurities easily block micropores in the aeration head, so that the aeration efficiency is improved, and the service life of the aeration head is prolonged are solved. The problem that follow-up use of the aeration device is affected is solved, the function of blocking protection is achieved, falling suspended impurities are effectively blocked and protected, micropores in the aeration head are prevented from being blocked, and the protection performance of the device is improved.

The invention discloses a magnetic biochar coupled dynamic membrane synergistic pollution reduction and flora regulation method, which comprises the following steps: adding magnetic biochar into an anaerobic dynamic membrane bioreactor for anaerobic digestion reaction, and adding 1.2-1.5 g of magnetic biochar into each liter of sludge mixed liquid in the anaerobic dynamic membrane bioreactor. The magnetic biochar is composed of a honeycomb-shaped carbon material obtained by pyrolyzing carbon through sodium citrate and Fe3O4 loaded on the surface of the honeycomb-shaped carbon material through a chemical coprecipitation method. According to the method, functional microorganisms such as methane filamentous bacteria and methane rod bacteria can be selectively enriched, the methane yield is increased by 30%-35%, membrane pollution is effectively relieved by improving the sludge floc structure, the service life of the membrane is prolonged, and technical support is provided for low-cost and low-energy-consumption operation of the anaerobic membrane bioreactor.

The invention discloses a system for treating leachate of a household garbage incineration plant based on direct ammoxidation, and relates to the technical field of treatment of the leachate of the household garbage incineration plant. A wastewater outlet of an anaerobic hydrolysis acidification reactor is connected to a water inlet of a first sedimentation tank, and a water outlet of the first sedimentation tank is connected to a water inlet of a direct ammoxidation reactor; a water outlet of the direct ammoxidation reactor is connected with a water inlet of the second sedimentation tank; a water outlet of the second sedimentation tank is connected with a water inlet of the heterotrophic denitrification reactor; a water outlet of the heterotrophic denitrification reactor is connected to a water inlet of the membrane bioreactor; a membrane water outlet of the membrane bioreactor is connected to a water inlet of the catalytic ozonation reactor, and effluent of the catalytic ozonation reactor flows into a water outlet barrel. The system does not need to add an expensive carbon source, so that the treatment process is simplified, the occupied area is reduced, and the construction investment and the operation cost are reduced to a certain extent.

Disclosed in the present invention are an electrochemically enhanced anaerobic-ammonium-oxidation membrane bioreactor based on a conductive separation membrane, and a biological nitrogen-removal method using same. The membrane bioreactor comprises a reactor shell, an anode, a cathode, a direct-current power supply, a water intake line and a water output line, wherein anaerobic-ammonium-oxidation bacteria are loaded into the reactor shell, and a water inlet is provided at the bottom of the reactor shell and is connected to the water intake line; the anode and the cathode are located in the reactor shell; a positive electrode of the direct-current power supply is connected to the anode, and a negative electrode of the direct-current power supply is connected to the cathode; and the cathode is a conductive membrane assembly, and a water outlet is provided at the top of the conductive membrane assembly and is connected to the water output line. In the present invention, a membrane biological treatment is coupled with an electrochemical technique, such that anaerobic-ammonium-oxidation bacteria can be effectively retained and enriched, the nitrogen-removal effect of the anaerobic-ammonium-oxidation bacteria is enhanced, and membrane fouling is alleviated by means of electrostatic repulsion. The device has a good nitrogen-removal performance, effectively alleviates membrane fouling, is easily operated and has broad application prospects.

The invention belongs to the technical field of sewage treatment equipment, particularly relates to an MBR (Membrane Biological Reactor) for advanced treatment of papermaking wastewater, and aims to solve the problems that dirt is attached to the outer wall of the existing MBR, the dirt in a reaction tank cannot be removed, the treatment function is single, and the water quality cannot be further improved. A sewage treatment structure for treating sewage is arranged in the reaction tank, a rotating shaft is rotatably connected to the inner wall of the bottom of the reaction tank, a bearing plate for bearing the sewage treatment structure is fixed to the top of the rotating shaft, and scrapers are fixed to the two sides of the top of the bearing plate. In the sewage treatment process of the membrane filter tube, dirt attached to the outer wall of the filter frame can be removed through cooperation of the bearing plate and the scraper, meanwhile, oxygen can be alternately injected into the reaction tank and the clear water tank through rotation of the bearing plate, the water quality in the clear water tank can be improved, and sewage in the reaction tank can be conveniently treated.