119 results about "Membrane bioreactor" patented technology

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 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 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 technical field of hollow fiber membranes, and discloses a preparation method of a dynamic MBR (membrane bioreactor) hollow fiber membrane component, which comprises the following steps: hollowly connecting an impeller framework with a rim pipe by using a connector to obtain an impeller type membrane component; a plurality of hollow fibers are cast into hollow fiber bundles, one ends of the hollow fiber bundles are cast on the reserved opening of the porous pipe sleeve of the impeller framework, the other ends of the hollow fiber bundles are bundled and cast on the hollow rim, and a blade type hollow fiber membrane assembly is prepared; connecting a hollow rim of the blade type hollow fiber membrane module with a rim pipe of the impeller type membrane module to obtain a dynamic MBR hollow fiber membrane assembly; arranging a plurality of dynamic MBR hollow fiber membrane assemblies on a water guide pipe, and connecting in series to form a wheel row; and arranging a plurality of wheel rows in a staggered manner to complete the preparation of the dynamic MBR hollow fiber membrane module. The invention can solve the problems of low packing density of the existing rotary membrane component and easy blockage and pollution of the root of the existing curtain type membrane component, and greatly prolongs the service life of the membrane.

This invention relates to the field of wastewater treatment technology, and in particular to a wastewater purification and reuse device based on a membrane bioreactor. Addressing the limited removal efficiency of pollutants adhering to membrane elements in existing technologies, this invention provides a wastewater purification and reuse device based on a membrane bioreactor. The device includes a treatment tank containing a membrane bioreactor assembly. The assembly includes an assembly frame with multiple membrane elements mounted on it. Scrapers that cooperate with the membrane elements are located on both sides of a horizontal plate. A cleaning assembly also includes a vertically movable frame. When the frame moves downwards, the horizontal plate moves downwards, and the scrapers clean the outer surface of the membrane elements downwards. A movable scraper is located on a support, and a collection box is located on one side of the support. When the scraper moves to one side, the collection box opens. By directly scraping away impurities adhering to the outer surface of the membrane elements, suspended solids, colloidal particles, microbial flocs, and other pollutants on the membrane surface can be removed quickly and effectively.

The invention provides a multi-angle enhanced contact membrane bioreactor which comprises a rotary swing frame, a membrane fan, an MABR membrane assembly, a rotary connecting shaft, an aeration assembly, a driving device and a suspension fixing beam arranged on a membrane pool, the rotary swing frame is movably connected with the suspension fixing beam through the rotary connecting shaft, the MABR membrane assembly is installed on the rotary swing frame, and the aeration assembly is installed on the rotary swing frame. The driving device drives the MABR membrane component and the rotary swinging frame to rotate and swing in a reciprocating manner around the axis of the rotary connecting shaft; the angles of the MABR membrane assembly, the sewage flowing direction, the sludge flowing direction and the aeration flow direction are circularly changed in the swinging process. The device is simple in structural design and convenient and fast to disassemble and maintain; the adjustment flexibility of the motion structure is high, corollary equipment is few, corollary equipment such as folded plates or partition plates for ensuring full contact between the membrane and water flow does not need to be added, dead zones are reduced, and the manufacturing cost is low; and the main swing connecting structure is above the water surface, so that the service life is long.

This invention relates to the field of wastewater treatment technology, and more particularly to a method for anaerobic ammonia oxidation denitrification in a conductive membrane bioreactor for wastewater with low concentrations of nitrite. Anaerobic ammonia-oxidizing bacteria are inoculated into a conductive membrane bioreactor; the bioreactor is connected to a DC power supply, with a conductive membrane assembly as the cathode and a three-dimensional porous or fibrous conductive carbon material with a high specific surface area as the anode, and a positive bias is applied to the anode; nitrogen-containing wastewater with a nitrite to ammonia nitrogen molar ratio of 1:1.5 to 1:5 is introduced into the electro-enhanced membrane bioreactor, where the anaerobic ammonia-oxidizing bacteria use the conductive carbon material at the anode as an extracellular electron acceptor for biological denitrification. This invention, based on a conductive membrane bioreactor, achieves efficient denitrification even under nitrite-deficient conditions through a dual approach of "electroadsorption enrichment + electrostimulation enhancement." This method is simple to operate, energy-saving, and has broad application prospects.

The utility model relates to the technical field of MBR membrane lifting, in particular to an MBR membrane lifting appliance, which comprises a lifting frame and an MBR membrane component, first guide grooves are arranged on two sides of the lifting frame, a lifting ring is arranged on the lifting frame, a rope tying point is arranged on the lifting ring, guide rods matched with the first guide grooves are mounted on two sides of the MBR membrane component, and the first guide grooves are communicated with the first guide rods. The top of the MBR membrane component is provided with a back-sliding type lifting lug matched with the position of the lifting ring; the lifting frame slides down along the guide rod through the first guide groove, so that the lifting ring is hooked to the center of the back-sliding type lifting lug along the back-sliding type lifting lug by virtue of a self-weight hook. According to the utility model, the MBR membrane component is hoisted by matching the guide groove on the hoisting frame with the guide rod and matching the hoisting ring on the hoisting frame with the back-sliding type hoisting lug, when the MBR membrane component is hoisted, a rope is tied at a rope tying point, the MBR membrane component is arranged at the bottom of the tank body, the tied rope is pulled up on two sides, and the hoisting ring can finish unhooking, so that the operation is simple, and a worker does not need to enter the bottom of the tank to operate; and the danger is greatly reduced.

The invention relates to the technical field of industrial wastewater treatment, and discloses an advanced oxidation-biological coupling treatment method and system.The method comprises the steps that after the pH value of wastewater is adjusted to be 3-5, Fenton oxidation and photocatalytic oxidation treatment are synchronously conducted in an oxidation reaction tower, the concentration of ferrous sulfate is controlled to be 8-12 mmol / L, the adding amount of hydrogen peroxide is controlled to be 40-60 mg / L, and the pH value of the wastewater is adjusted to be 3-5; irradiating with a 0.4-0.6 W ultraviolet light source, and reacting for 8-16 hours; the pressure is monitored in real time in the process, and safety pressure relief protection is set; after oxidation treatment, the pH value of the wastewater is adjusted to 6.5-8.5, biodegradation is conducted through a fluidized bed or a membrane bioreactor, the air flow of the fluidized bed is controlled to be 1-2 m < 3 > / h, and the membrane bioreactor is subjected to gas-water combined backwashing with the period of 4-12 hours; and finally, the effluent is recycled or discharged after being monitored to reach the standard. The system comprises an adjusting unit, an advanced oxidation unit, a biological treatment unit and an intelligent control unit which are sequentially connected. According to the invention, efficient decomposition and deep purification of refractory organics are realized, the treatment efficiency is high, the operation is stable, and the safety is good.

The present application relates to sewage treatment technical field, specifically to a kind of chemical wastewater desalination integrated processing method.The present application overcomes the problem of low resource utilization efficiency of chemical wastewater desalination in prior art;The present application first synthesizes three-dimensional catalytic aerogel microspheres, which are loaded in a fixed bed to target adsorption and catalytic chain scission of macromolecular polymers in high-salinity wastewater with persulfate;Subsequently, a salt-tolerant membrane bioreactor is introduced to form small-molecule organic compounds through deep metabolism;The effluent is sequentially subjected to target complexation and precipitation of heavy metals using modified chitosan and amphoteric polyacrylamide, pre-implantation of polyepoxysuccinic acid scale inhibitor, and finally subjected to nanofiltration and reverse osmosis systems, freeze crystallization and MVR evaporation to extract high-purity sodium sulfate and sodium chloride.The present application effectively solves the problem of membrane fouling caused by heavy metal leakage and organic matter residue in traditional process, and realizes the deep purification of chemical wastewater and the high-value resource recovery of salt.

The utility model relates to an integrated coal-fired power plant heavy metal-containing sewage treatment system and belongs to the technical field of water pollution control. The system is connected with a grit chamber, a microfiltration membrane filter, an ozone catalytic oxidation unit, a photocatalytic oxidation unit, an electrochemical oxidation unit, an ion exchange unit, a magnetic nano adsorption unit and an anaerobic biological filter in sequence through a water inlet through a grid. The anaerobic biological filter is connected with a membrane biological reactor and a reverse osmosis system through an aerobic biological reactor. The utility model system adopts compact design, has small land occupation, low operation cost, stable and efficient treatment effect, and the effluent quality reaches the national discharge standard or reuse requirement. The utility model not only significantly improves the removal efficiency of heavy metal ions, but also realizes energy recovery through sludge anaerobic digestion and biogas power generation, having remarkable environmental benefits and economic value.

A method of operating an immersed membrane filtration system includes a step of providing a liquid flow, for example a recirculation flow, past the surface of the membranes to clean, or help clean, the membrane surface. Since immersed outside-in membranes are effectively filtering out clean water from the effluent, they are also dewatering the effluent. To avoid solids concentration, most immersed membrane systems require that a certain amount of effluent liquid is recirculated back to an area upstream of the membranes. This is called a recirculation flow in general and is, for example, associated with the flow of return activated sludge (RAS) in a membrane bioreactor (MBR). In systems and methods described herein, we control a recirculating flow to have enough energy to scour the surface of the membranes, thus combining its use of providing liquid to the membranes and scouring their surfaces.

The invention discloses a membrane biological reaction device and method for chemical wastewater, and aims to solve the problems that sludge is easy to adhere to a membrane of an existing membrane biological reactor, manual cleaning wastes time and labor, and sludge accumulation affects system stability. The device comprises a connecting box body, a membrane bioreactor is arranged in the box body, a swing cleaning structure is assembled on the box body, the bottom is connected with a pollution discharge structure, a controller and a water pump are mounted on the side wall, and a pollution discharge pipe is connected with an electromagnetic control valve in series; the swing cleaning structure drives a swing spray pipe to swing and move up and down through multi-stage transmission of a driving motor, and is matched with water supply of a water pump to realize all-directional cleaning of the membrane module; the sewage discharging structure drives an auger to convey sludge through a rotating motor, and a rotating scraping plate scrapes sludge on the inner wall of a funnel, so that the sludge is automatically discharged; when in use, the controller uniformly regulates and controls the operation of each part without manual disassembly. The device is clean, efficient, high in automation degree, capable of avoiding sludge accumulation, improving the operation efficiency and stability of the device and saving the labor cost, and is suitable for complex working conditions of chemical wastewater treatment.

This invention discloses a membrane bioreactor (MBR) treatment method and a field return system for wastewater from sheep slaughterhouses. After three-stage pretreatment, the wastewater undergoes two-stage anoxic-aerobic denitrification, with segmented influent and two-stage internal recirculation. A short-range nitrification window is created in the first-stage aerobic zone with low dissolved oxygen through intermittent aeration, while stable nitrification occurs in the second-stage aerobic zone. The biochemically treated effluent enters a PVDF submerged ultrafiltration (MBR), where the mixed liquor suspended solids concentration and flux are controlled. Backwashing / relaxation and chemical cleaning sequences are triggered by the increase in transmembrane pressure difference per unit time, enhancing shock and fouling resistance. MBR permeate is fed into a field return tank and connected to the field return system. Precise water and fertilizer return and salt control are achieved through rapid nitrogen and phosphorus measurement, application decision-making, and stratified drip irrigation valve control. This scheme can achieve effluent ammonia nitrogen ≤3 mg / L, high total nitrogen removal, and reduced membrane fouling and nitrogen loss.

The utility model relates to the technical field of MBRs (Membrane Bioreactors), in particular to a sewage treatment device for retarding MBR membrane pollution, which comprises a sewage pool and a swinging device, a moving seat capable of horizontally moving is arranged on the sewage pool, a mounting frame is arranged on the moving seat, and a plurality of groups of hollow fiber membrane main bodies are arranged on the mounting frame; the swing device comprises a supporting frame arranged on the movable base, a motor arranged on the supporting frame, a main shaft rotationally connected to the supporting frame, a rotating disc coaxially arranged on the main shaft, an eccentric shaft arranged on the rotating disc, a rotating rod rotationally connected with the eccentric shaft, two fixing blocks arranged on the supporting frame and guide sliding blocks slidably connected to the fixing blocks. The moving rod is arranged on the guide sliding block, the connecting shaft is connected to the rotating rod and the moving rod in an inserted mode, the two connecting frames are arranged on the moving rod, and the motor is in driving connection with the main shaft. The MBR membrane shaking device not only can play a good shaking role on an MBR membrane, but also can reduce the abrasion of driving equipment and ensure the service life of the equipment.

This application discloses a deep denitrification system for ultra-low C / N ratio kitchen waste slurry, belonging to the field of kitchen wastewater treatment technology. The system comprises three sequentially connected stages: pretreatment, fine treatment, and deep treatment. The pretreatment stage involves pretreatment, hydrolysis, acidification, and centrifugation, followed by pumping into an anaerobic external circulation membrane bioreactor composed of an anaerobic fermenter and an external PVDF tubular membrane. The PVDF tubular membrane effluent is divided into three streams: one is returned to the anaerobic fermenter, the other directly enters the flotation unit, or the third enters a combined deep denitrification coupling device consisting of an anaerobic reactor-membrane aeration biofilm reactor-anaerobic ammonia oxidation reactor. After deep denitrification, the effluent flows into the flotation unit, and after two-stage nitrification, it enters the ultrafiltration system. Part of the ultrafiltration permeate is reused for backwashing, and the concentrate is returned to the deep denitrification coupling device to adjust the C / N ratio. This application achieves differentiated efficiency enhancement, resource reuse, and energy saving of ultra-low C / N ratio kitchen waste slurry through three-stage gradient synergy and precise seasonal control, enabling deep denitrification without the need for an external carbon source.

The application relates to the technical field of water treatment, and particularly discloses a high-efficiency landfill leachate treatment process. The high-efficiency landfill leachate treatment process comprises the following steps: pretreatment: adding a coagulant A into landfill leachate, then adding a coagulant B, carrying out sedimentation or subsidence treatment, and obtaining pretreated liquid; the coagulant A comprises polyferric sulfate; the coagulant B comprises polyaluminum chloride, cationic polyacrylamide, modified bentonite and activated carbon; A / O treatment: sequentially passing the pretreated liquid through an anoxic tank and an aerobic tank to obtain treatment liquid A; MBR treatment: carrying out MBR treatment on the treatment liquid A by using an MBR (membrane bioreactor), to obtain treatment liquid B; and DTRO treatment: carrying out DTRO treatment on the treatment liquid B, to obtain purified water. The treatment process is convenient, and the treatment effect on the landfill leachate is good.

The utility model discloses a high-efficiency low-consumption membrane bioreactor, which belongs to the technical field of water treatment and comprises a settling tower and a crushing box, a connecting pipe is arranged in the settling tower, a water inlet pipe is arranged at one end of the connecting pipe and penetrates into the crushing box, a crushing component is arranged in the crushing box, and a water outlet pipe is arranged at the other end of the connecting pipe. The crushing assembly comprises rotating shafts, and the two rotating shafts are rotationally mounted on the inner walls of the two sides of the crushing box, so that large impurities in liquid are cut and crushed into small particles, the particle size of the impurities is greatly reduced, the impurities are more easily intercepted by a filter plate, the filter plate is conveniently and quickly mounted and dismounted, and the crushing efficiency is improved. The filter plate is convenient to maintain, clean and replace, the service life of the filter plate is prolonged, and the biological reaction efficiency is greatly improved, so that the time of the whole purification process is shortened, the treatment capacity of the membrane bioreactor is improved, and the hollow frame and the biological membrane are easily taken out from the reaction box.

The invention discloses a device and a method for degrading manganese and SMZ in surface water by an illumination intensified aeration fluidized birnessite and algae substance coexisting system. The device comprises a raw water tank, a membrane bioreactor, an aeration strip, an aeration pump and an effluent collecting tank, the raw water tank provides raw water for the membrane bioreactor, the membrane bioreactor comprises a tank body, a ceramic membrane, birnessite and a light source, the aeration strip is arranged in the tank body, the ceramic membrane is vertically arranged in the tank body and located above the aeration strip, the interior of the ceramic membrane is a cavity which is a purification area, birnessite is dispersedly placed in the raw water area, and the light source illuminates the tank body; bubbles generated by the aeration strip drive water flow to flow upwards, birnessite is in contact with raw water and is adsorbed and oxidized in the process, manganese and SMZ are removed in combination with lighting, the raw water enters a cavity of the ceramic membrane after being purified, and the cavity is communicated with an effluent collecting tank. The method has a good removal effect on manganese ions and SMZ, effluent can be used for distributed drinking water facilities, and the method has practical significance.

The application discloses a coil pipe type sewage treatment device, which comprises a coil pipe, an inner part of the coil pipe is provided with a tank body, the tank body is provided with a membrane bioreactor for treating sewage, a top of the tank body is provided with a tee pipe, two input ends of the tee pipe are respectively communicated with a sewage inlet pipeline and a circulating water outlet pipeline communicated with a bottom of the tank body, an output end of the tee pipe is communicated with a coil pipe water inlet flange of the coil pipe, the other end of the coil pipe is communicated with the tank body through a coil pipe water outlet flange, an output end of the membrane bioreactor is discharged through a clear water outlet pipeline after reaction and filtration. In the application, oxygen is fully consumed in the coil pipe by the inlet pipeline, so that the workload of the membrane bioreactor is reduced, and the energy-saving effect is achieved. During the mixing process of the mixed water in the coil pipe, sewage with micro-bubbles and water with activated sludge are mixed in the pipeline, sufficient dissolved oxygen is provided, the chemical reaction is fully generated in the pipeline, the oxygen is fully consumed, the effects of oxygenation, anoxia and anaerobic are generated in the coil pipe, and the sewage treatment efficiency is improved.

The utility model relates to an MBR (Membrane Biological Reactor) membrane group coupling structure which is used for mounting an MBR membrane group on water treatment equipment. Comprising a guide pipe, one end of the guide pipe is arranged in a fixed framework, and the guide pipe is vertically arranged. The upper end, the lower end and the two opposite side faces of the MBR membrane set are each provided with at least one pair of limiting rods, each guide pipe is located between at least two pairs of limiting rods, one pair of limiting rods are located at the upper ends of the guide pipes, the other pair of limiting rods are located at the lower ends of the guide pipes, and positioning rods are arranged on the limiting rods located at the upper ends in a penetrating mode. The inner side ends of the positioning rods abut against the outer walls of the guide pipes. Wherein the limiting rods and the guide pipes which are arranged in pairs are matched for limiting the MBR membrane group, meanwhile, the MBR membrane group is conveniently fixed on the guide pipes during disassembly and assembly, and the positioning rod is only arranged on the limiting rod at the upper end, so that an operator can conveniently disassemble and assemble the MBR membrane group.

The application provides a kind of oxygen-enriched membrane reactor and membrane bioreactor coupling sewage treatment system, relating to domestic sewage technical field, including: coupling treatment pool, clear water pool, sludge storage pool, equipment room, guide wall, sewage inlet pipe, air supply fan, oxygen-enriched membrane reactor and inorganic membrane bioreactor;The upper portion of the coupling treatment pool is the equipment room, and the air supply fan and the control system are in the equipment room.The application integrates the oxygen-enriched membrane reactor and the inorganic membrane bioreactor by modularization reinforcement treatment, forms the aerobic zone, the facultative zone and the anaerobic zone in the oxygen-enriched membrane reactor due to its unique structure and high oxygen utilization efficiency, is used for the nitrification of ammonia nitrogen and the removal of most total nitrogen, forms simultaneous nitrification and denitrification reaction in the reactor, further strengthens the removal of pollutants in water in the inorganic membrane bioreactor, and realizes the separation of sludge and water, so that the effluent quality of the sewage treatment system is stable and up to standard under the condition of ensuring certain fluctuation of water quantity.

This invention relates to a continuous oily wastewater treatment device, comprising an oil removal unit, an ozone oxidation treatment unit, a membrane bioreactor unit, and a biological aerated filter treatment unit. These units are sequentially connected via corresponding pipelines. The biological aerated filter treatment unit includes an aeration tank body, within which a biological packing material is detachably installed. First branch pipes are respectively installed on both sides of the aeration tank body, and multiple second branch pipes are fixedly installed on each first branch pipe. Each second branch pipe is equipped with an aeration head and a detection device for identifying whether the aeration head is clogged. An auxiliary disassembly device is installed within the aeration tank body to simultaneously remove all clogged aeration heads, facilitating manual recycling and replacement of severely clogged aeration heads and reducing maintenance time costs.

The utility model discloses a multi-section AAO-MBR (anaerobic-anoxic-oxic-membrane bioreactor) composite sewage treatment device, which relates to the technical field of sewage treatment and comprises a pretreatment section, a primary treatment section, a secondary treatment section, an advanced treatment section and a sludge treatment section. The pretreatment section comprises a coarse screen, a lifting pump room, a fine screen and an aerated grit chamber which are sequentially connected through pipelines; the primary treatment section comprises a membrane grid and a primary sedimentation tank; the secondary treatment section comprises a multi-section AAO biochemical tank; the multi-section AAO biochemical tank comprises an anaerobic tank, a first anoxic tank, a first aerobic tank, a second anoxic tank and a second aerobic tank. According to the device, gradient utilization of a carbon source and efficient synergistic removal of nitrogen and phosphorus are realized through symmetrical layout, rotary circulation and graded reflux. The advanced treatment system adopts an MBR membrane tank, and ensures that suspended solids and total phosphorus in effluent stably reach the standard through a membrane separation technology. And the sludge treatment section is combined with a low-temperature vacuum drying technology, so that the water content of the sludge is reduced to be less than 40%, and efficient treatment and resource utilization of the sludge are realized.

The invention relates to the technical field of MBRs (Membrane Bioreactors), in particular to a cleaning system and method for MBR membranes, and aims to prolong the service life of the membranes and improve the cleaning efficiency and the system stability through a multi-stage circulating backwashing technology. The invention provides an MBR membrane cleaning system based on multi-stage circulating backwashing. The system comprises an online monitoring module, a hierarchical control module, a three-stage backwashing unit, a water quality guarantee system and an intelligent control platform, the three-stage backwashing unit comprises a physical backwashing unit, a chemical backwashing unit and a restorative backwashing unit. The key technical problem of the MBR membrane in practical application is systematically solved, multiple innovations such as integrated control, precise cleaning and water quality guarantee are realized, and the technical advancement is outstanding; the operation cost is obviously reduced, the return on investment is high, and the economic practicability is obvious; the use of chemicals is reduced, the resource utilization rate is improved, and environmental friendliness is embodied; the method is suitable for various application scenes, and is high in popularization value and market adaptability.

The present application relates to sewage treatment technical field, specifically to a kind of denitrification membrane bioreactor sewage treatment method.The present application overcomes the problem of low efficiency of denitrification and phosphorus removal in traditional sewage treatment method.The present application effectively adsorbs and decomposes ammonia nitrogen molecules in sewage by preparing hydrophilic suspended filler;Suitable aeration intensity and adjusting the hydraulic retention time between each unit make organic matter in sewage and sludge decompose deeply, form gradient environment of aerobic, anoxic and anaerobic;Microbial growth promoter as electron donor, supply the carbon source and nitrogen source required for microbial growth and reproduction;Mechanical stirring is carried out in anoxic unit, and suitable swing angle is set in each unit cell, so that sludge and microorganisms are fully contacted, the filtration capacity in denitrification membrane bioreactor is improved, and the time of biofilm formation is shortened;Linkage is formed between anaerobic unit, anoxic unit, membrane separation zone and aerobic unit, and the efficiency of denitrification and phosphorus removal in denitrification membrane bioreactor is improved.

The utility model discloses an MBR (Membrane Bioreactor) off-line cleaning device which comprises a cleaning cavity, an aeration device is arranged in the cleaning cavity, at least one group of guide upright posts are fixed on the inner wall of the cleaning cavity, and the guide upright posts are used for clamping a membrane component in the cleaning cavity to stably clean the membrane component. At least two groups of aeration devices are arranged, and the at least two groups of aeration devices are supported near the bottom position of the cleaning cavity through a fixing frame so as to ensure that the aeration devices can be stably fixed in the cleaning cavity. According to the MBR off-line cleaning device disclosed by the utility model, a light membrane module can be quickly guided into the cleaning cavity and can be stably arranged in the cleaning cavity without shaking during cleaning, so that the light membrane module can be completely and sufficiently washed in the cleaning process.

The utility model belongs to the technical field of MBR membrane pretreatment, and particularly relates to an MBR membrane pretreatment filtering device which comprises a through shell and a filtering plate, an annular limiting frame plate is fixedly connected to the inner wall of a lower end opening of the through shell, end fixing plates are placed on the surface of the upper end of the annular limiting frame plate, an MBR membrane main body is fixedly installed between the two end fixing plates, and the MBR membrane main body is fixedly connected with the filtering plate. A splicing and disassembling structure is connected between the through shell and the filter plate; according to the utility model, through the arrangement of the splicing and dismounting structure and the plugging and unplugging assembly, the through shell and the filter plate can be conveniently mounted and dismounted. During mounting, a rectangular insertion block at the lower end of the filter plate is inserted into a rectangular slot penetrating through the end part of the shell, and then a sliding plate is pushed by a reciprocating mechanism, so that a limiting insertion rod is inserted into a limiting insertion hole, and stable connection between the filter plate and the limiting insertion hole can be completed; during disassembly, the sliding plate is pulled through the reciprocating mechanism, so that the limiting insertion rod is separated from the limiting insertion hole, and the filter plate can be easily taken down.

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.