32results about How to "Improve the effect of anaerobic treatment" patented technology

The invention relates to the technical field of sewage treatment, and specifically relates to an airlift type integrated sewage treatment device. The airlift type integrated sewage treatment device comprises an adjusting tank, an anaerobic tank, an anoxic tank, an aerobiotic tank and a sedimentation tank which are installed in a shell and are communicated in sequence. The aerobiotic tank is provided with an aerator pipe and a first airlift mechanism; the first airlift mechanism comprises a first air inlet and a first lifting pipe; an inlet of the first lifting pipe extends to a medium-lower part of the aerobiotic tank; the first an outlet of the first lifting pipe is communicated with the anoxic tank; the first airlift inlet pipe is communicated with the first lifting pipe; both the aerator pipe and the first air inlet pipe are connected to a draught fan; and a meshy deoxidization frame matching with a cross section of the aerobiotic tank is disposed in the aerobiotic tank and above a water inlet of the aerobiotic tank. The first airlift mechanism, a second airlift mechanism and the aerator pipe are sent air by the same draught fan, thereby reducing components in the device, reducing cost of the device, simplifying the structure of the device and facilitating maintenance of the device. A liquid and sludge are refluxed in an airlift manner, so that energy consumption of the device can be reduced and operation cost is reduced.

The invention relates to a novel membrane coupled anaerobic bioreactor, comprising an baffle plate anaerobic reactor and a tubular membrane ultrafiltration device; a water outlet of the baffle plate anaerobic reactor is communicated with a water inlet of the tubular membrane ultrafiltration device by pipelines, and a water return port of the tubular membrane ultrafiltration device is communicatedwith a water inlet of the baffle plate anaerobic reactor by pipelines; when treating wastewater, the wastewater flows in from the water inlet of the baffle plate anaerobic reactor and the water inletof the tubular membrane ultrafiltration device, then the wastewater after being treated flows out from a discharge port of the tubular membrane ultrafiltration device, and anaerobic activated sludge which is generated when the tubular membrane ultrafiltration device treats the wastewater reflows to the water inlet of the baffle plate anaerobic reactor. The reactor and the method can separate and fix microorganisms completely, ensure the microorganism concentration in a reaction chamber to be much more than the concentration in a normal anaerobic device, improve the anaerobic treating effect, quicken the anaerobic reaction speed greatly, shorten the residence time of the wastewater effectively and prolong the residence time of the sludge greatly.

A method for using anaerobic co-metabolism to treat wastewater of coal chemical industry relates to a method for treating wastewater of coal chemical industry. The invention solves the problems that when anaerobic technology is adopted to treat wastewater of coal chemical industry, start is difficult, initial anaerobic culture is difficult to adapt to wastewater and high-efficiency and stable operation is difficult to realize. The method mainly comprises the following steps of: selecting the wastewater to be treated; taking anaerobic granular sludge as initial seeding sludge source; adopting methanol as co-metabolism substrate and controlling the rate of the total COD (chemical oxygen demand) content of added methanol every day and the total COD content of treated wastewater of coal chemical industry every day between 0.1-0.5; keeping HRT (hydraulic retention time) of 24h; and controlling working conditions to be stable. By using the methanol as the co-metabolism substrate in anaerobically treating the wastewater of coal chemical industry, the method leads anaerobic biochemical property of gas making wastewater to have a dramatic rise, shortens the start time of a reactor, and solves the problem of difficult anaerobic treatment of the wastewater of coal chemical industry. After stable operation, the COD removal ratio of the wastewater of coal chemical industry anaerobic treatment can reach over 50 percent and the removal ratio of total phenol can reach 70-80 percent.

The invention discloses a pretreatment device for efficient sewage treatment, which comprises a device body; the device body is mainly composed of a base, a box body, a water inlet, a water outlet, a filtering cavity and a stirring cavity; the filtering cavity and the stirring cavity It is separated by a rotating plate, and the rotating plate is rotatably connected with the inner wall of the box; a fixed plate is arranged in the filter cavity, and the fixed plate and the rotating plate are fixedly connected by a filter element, the top of the box is fixedly connected with the first motor, and the bottom of the box Both sides are fixedly connected with vibration motors, the vibration motors are electrically connected with the power supply outside the device body, the bottom of the box is fixedly connected with telescopic devices, the ends of the telescopic devices are fixedly connected with magnets, and the surface of the base is fixedly connected with magnets. The device avoids the local overload of the filter element and the clogging of the filter element, improves the filtration efficiency of the sludge, improves the stirring range of the sewage, and uniformly distributes the microorganisms, greatly improves the anaerobic treatment effect of the sewage, and facilitates the depth of the sewage in the later stage. deal with.

The invention discloses a method for strengthening anaerobic digestion treatment of molasses alcohol wastewater, and belongs to the technical field of wastewater treatment control and environmental protection purification treatment. According to the method disclosed by the invention, nano zero valent iron is added to an anaerobic digestion system to strengthen the treatment effect of the molasses alcohol wastewater, thereby not only effectively handling the molasses alcohol wastewater and realizing the harmlessness and reuse of the molasses alcohol wastewater, but also improving the production efficiency of methane of anaerobic digestion of the molasses alcohol wastewater.

The invention provides a rural domestic breeding mixed sewage treatment integrated system, and belongs to the technical field of water treatment. The system comprises a water collection well, an oil-separating tank, a contact anaerobic tank, a gravel bed, a regulating tank and a natural oxygen enriched soil purification tank which are sequentially connected by virtue of pipelines. The technical flow of the system comprises: mixed sewage flows through the oil separator, the contact anaerobic tank, the multi-stage gravel bed and the natural oxygen enriched soil purification tank, and is drained. According to the system, sewage natural flow can be implemented by reasonably laying sewage treatment facilities for villages distributed along slopes, external force is not needed, and operation cost is not generated; for flat-relief villages, sewage only needs once lifting in a submersible sewage pump, is treated in various treatment systems, and is drained. The integration technology has the advantages of convenient construction, simple operation, low operation cost, high treatment efficiency and the like, is easy to manage and maintain, and is suitable for rural areas with more breeding.

The invention relates to the environmental protection technology, and particularly relates to a domestic sewage treatment apparatus. The invention aims to provide a domestic sewage treatment apparatus which is stable, high in efficiency and low in cost. A cylindrical integrated biological treater for domestic sewage comprises a cylinder, an inner tube is arranged in the cylinder, and an inner cavity of the inner tube forms a regulating-hydrolysis cavity; a space between the inner tube and the cylinder is sequentially partitioned along the circumferential direction so as to form a primary aerobic cavity, a primary anoxic cavity, a secondary aerobic cavity, a secondary anoxic cavity and a settling cavity which are independent; the regulating-hydrolysis cavity is connected with a water inlet pipe, the bottom of the primary aerobic cavity is interconnected with the bottom of the primary anoxic cavity, and the bottom of the secondary aerobic cavity is interconnected with the bottom of the secondary anoxic cavity; the upper parts of the regulating-hydrolysis cavity, the primary anoxic cavity, the secondary aerobic cavity and the secondary anoxic cavity are respectively provided with a gap leading to a downstream cavity; the upper part of the settling cavity is provided with a water outlet and a mud discharge device; and an aeration device is respectively arranged in the primary aerobic cavity and the secondary aerobic cavity, and a stirring device is respectively arranged in the primary anoxic cavity and the secondary anoxic cavity.

The invention discloses a kitchen waste water anaerobic MBR treatment device. The kitchen waste water anaerobic MBR treatment device comprises a kitchen anaerobic digestion cell and an anaerobic MBR membrane pool, wherein a bottom water inlet of the kitchen anaerobic digestion cell is connected with a kitchen waste water inlet pipe, and a bottom water outlet of the kitchen anaerobic digestion cell is connected with a sludge reflux pump; a top gas outlet of the kitchen anaerobic digestion cell is connected with a biogas tank by virtue of a biogas collection pipe, and a top water outlet of the kitchen anaerobic digestion cell is connected with the anaerobic MBR membrane pool; an anaerobic MBR membrane assembly is arranged in the anaerobic MBR membrane pool, the upper end of the anaerobic MBR membrane assembly is connected with a cleaning opening at the upper portion of the anaerobic MBR membrane pool, the bottom input end of the anaerobic MBR membrane assembly is connected with a biogas fan, the input end of the biogas fan is connected with the biogas tank, and a bottom water outlet of the anaerobic MBR membrane pool is connected with the sludge reflux pump. The kitchen waste water anaerobic MBR treatment device is high in automation, stable and reliable in operation, easy in operation, easy in management, and convenient for cleaning, replacing and additionally arranging the membrane.

The invention discloses a biomass gasification wastewater treatment method and device. The treatment method comprises the following steps: (1) pretreatment: performing oil removal treatment, first coagulation treatment, flotation treatment and first ozone oxidation treatment on biomass gasification wastewater to obtain first effluent water; (2) biochemical treatment: sequentially performing anaerobic treatment and A / O (anoxic / oxic) biological catalytic oxidation treatment on the first effluent water, and collecting second effluent water; and (3) advanced treatment: sequentially performing second coagulation treatment and membrane separation treatment on the second effluent water to obtain up-to-standard effluent water. The device comprises an oil removal device, a first coagulation device, a flotation device, a first ozone oxidation treatment device, an anaerobic treatment device, an A / O biological catalytic oxidation device, a second coagulation device and a membrane separation device which sequentially communicate with each other. The method and device have the characteristics of favorable wastewater treatment effect and high anti-shock loading capability, and can effectively treat biomass gasification wastewater; and the treated effluent water has favorable water quality.

The invention relates to a method of sewage treatment and recycling usage. The method comprises the following steps: sewage passes through a comprehensive adjusting pond, a microbial bioreactor, a bacterial sludge rapid separation return device, a secondary sedimentation tank and a rapid filter in sequence; clean water obtained after passing through the rapid filter enters a clean water basin, and then is fed back to a production workshop for reuse by a water pump; sludge deposited in the bacterial sludge rapid separation return device enters into the microbial bioreactor through a sludge return pipe; sludge deposited in the secondary sedimentation tank enters a sludge sump through a pipeline, and sludge in the rapid filter enters into the sludge sump though the pipeline; when the SVI of the microbial bioreactor is between 50 to 100, the sludge collected by the sludge sump is fed to the microbial bioreactor through the pipeline; when the SVI of the microbial bioreactor is more than and equal to 200, the collected by the sludge sump is sent to a sludge digester through the pipeline; and sludge in the sludge digester is fed back to the comprehensive adjusting pond through the pipeline. The method has the advantages of less discharge amount of the sludge and higher activation and the quantities of microorganism in the comprehensive adjusting pond and the microbial bioreactor.

The invention discloses a water distribution system for an anaerobic reactor, comprising a support (1). A plurality of U-shaped water distribution pipes (2) are disposed on the support (1) and provided with a plurality of nozzles (3), and two adjacent nozzles (3) on branch pipes of the U-shaped water distribution pipes (2) are always on two sides of the corresponding branch pipe; water inlets of the U-shaped water distribution pipes (2) are connected with an inflow master pipe (5) respectively through corresponding inflow branch pipes (4), and the inflow master pipe (5) distributes water for the U-shaped water distribution pipes (2) in mechanical constant-pressure distribution manner. The U-shaped water distribution pipes herein enable uniform water distribution with no dead corner and good mud bed activity; a pressure backflushing system is added, blockage of the water distribution system and mud bed dead corners that are formed are eliminated, high efficiency and low energy consumption are achieved, anaerobic treatment effect is improved, significant environmental and economic benefits are achieved in the field of treatment of high-concentration organic wastewaters, and wastewater treatment cost is decreased by 8%.

The invention provides an anaerobic dynamic membrane reactor for efficiently treating degradation-resistant wastewater, and aims to effectively remove organic matters and suspended solids (SSs) in high-concentration wastewater. An indent dynamic membrane component is used, the thickness of a dynamic membrane is quantitatively controlled through shearing force generated by a circulation gas and a baffle plate of a certain thickness, backwash cleaning is avoided, a dynamic membrane layer is prevented from dissociation, and thus effluent quality stability can be ensured. Conductive carbon cloth is adopted as a carrier material for forming a bio-membrane, microorganisms with electron transfer can be enriched, the electron transfer efficiency of microorganisms of the dynamic membrane layer canbe improved, and furthermore the organic matter degradation and the anaerobic methanogenesis efficiency can be improved. Meanwhile, SSs and macromolecule degradation-resistant organic matters (greaterthan 4000Da) in wastewater can be effectively retained by the dynamic membrane layer, the effluent quality can be improved, and later treatment on effluents can be facilitated. In addition, the anaerobic dynamic membrane reactor is simple in operation and low in cost.

The invention discloses a biochemical treatment system and process for landfill leachate. The biochemical treatment system is formed by sequentially connecting an anaerobic tank, a denitrification tank, an aerobic tank and a secondary sedimentation tank end to end, wherein the anaerobic tank and the secondary sedimentation tank respectively communicate with a water inlet pipeline and a water outlet pipeline; the anaerobic tank and the denitrification tank are respectively divided into a plurality of grids along a water flow direction; the aerobic tank is connected to a water inlet end of the denitrification tank through a mixed liquid return pipeline positioned at the water outlet end of the aerobic tank; a sludge return pipeline is arranged at the bottom of the secondary sedimentation tank; and the other end of the sludge return pipeline is divided into two branches which respectively communicate with the water inlet ends of the aerobic tank and the anaerobic tank. The biochemical treatment process for landfill leachate realized on the basis of the system can effectively remove COD, ammonia nitrogen and total nitrogen pollutants in the landfill leachate.

The invention discloses an anaerobic reaction tank. The anaerobic reaction tank is characterized in that a partition plate with a nearly 'W'-shaped longitudinal section is distributed on the lower portion of a tank, and the lower portion of the tank is divided into a circle of water inlet distribution cavities and a circle of sediment collecting cavities by the partition plate; a main water inletpipe is communicated with the water inlet distribution cavities; a plurality of water distribution branch pipes are further distributed on the tank; a plurality of water distributors are further distributed on the portions, which are distributed in the tank, of the water distribution branch pipes; the water distributors are distributed above the sediment collecting cavities; the water distributionbranch pipes are communicated with the water inlet distribution cavities; a plurality of sediment discharge pipes are communicated with the lower portions of the sediment collecting cavities, and theouter ends of the sediment discharge pipes extend out of the tank; valves are further distributed on the sediment discharge pipes, and a potential energy circulator is further arranged on the upper portion of the tank. The anaerobic reaction tank has the advantages of uniform water distribution, good reaction effect, difficulty in blockage, easiness in checking blockage, efficient blockage removal, good sediment settling and collecting effects, simplicity and convenient in sediment discharge and stable integral operation.

The invention provides a kitchen waste anaerobic pretreatment device and method. The device comprises a crusher, a crushing and screening all-in-one machine and a sand remover. The crusher is provided with a kitchen waste inlet and a crushed material outlet. The crushing and screening all-in-one machine is provided with a crushed material inlet, a kitchen waste serous fluid outlet and an impurity outlet. The crushed material inlet is connected with the crushed material outlet. The sand remover is provided with a kitchen waste serous fluid inlet. The kitchen waste serous fluid inlet is connected with the kitchen waste serous fluid outlet. Through the device provided by the invention, components such as plastic bags, dump rags, bottles, tableware and gravels which cannot be subjected to anaerobic fermentation conveniently in kitchen waste can be filtered out as much as possible, the material solid content and material particle diameter are adjusted, the subsequent anaerobic process requirement of the kitchen waste is met, and thus the anaerobic treatment effect can be improved. In addition, the kitchen waste is subjected to anaerobic pretreatment through the device, process equipment is simple and reliable, and the device is quite suitable for mass application.

The invention discloses an anaerobic reaction system for treating livestock and poultry breeding sewage or high-concentration organic wastewater. The anaerobic reaction system comprises a suspended matter removal, baffling and reaction device, an internal-backflow anaerobic baffling and reaction device, an anaerobic sludge collection device and a sludge concentration tank which are sequentially communicated, wherein the internal-backflow anaerobic baffling and reaction device comprises six reaction separation structures which have the same structure and are communicated in sequence; the first-stage reaction separation structure comprises a first-stage reaction separation chamber in which a second baffle plate is arranged in the longitudinal direction; the second baffle plate divides the first-stage reaction separation chamber into a second descending flow chamber and a second ascending flow chamber of which the lower parts are communicated with each other; a first sewage pump is arranged at the bottom of a descending flow chamber of the third-stage reaction separation structure; an outlet of the first sewage pump is communicated with the second descending flow chamber; a second sewage pump is arranged at the bottom of an ascending flow chamber of the sixth-stage reaction separation structure; and an outlet of the second sewage pump is communicated with a descending flow chamberof the fourth-stage reaction separation structure; the reaction is stable, an additional collecting tank is not needed, and the investment is small.

The invention discloses an anaerobic reactor and an organic printing-dyeing wastewater treatment system comprising the same. The anaerobic reactor comprises a tower, a water distribution area, a high-load anaerobic treatment area, a primary triphase separation area, an anaerobic bio-membrane treatment area, a secondary triphase separation area and a gas-water separation area are sequentially arranged inside the tower from bottom to top. The anaerobic reactor is simple in structure, low in input cost, convenient to operate, capable of respectively collecting and treating according to water quality difference of wastewater generated by different processes, highly targeted, excellent in treatment effect and capable of finally making outgoing water to meet discharging standard requirements.

The invention provides a technology suitable for anaerobic treatment of swine wastewater and belongs to the field of environmental protection. Traditional swine wastewater treatment technologies mostly adopt an up-flow type anaerobic fluidized bed, have a good treatment effect and are mature, but can only be suitable for small-scale swine wastewater treatment; for large-scale swine wastewater treatment, hydraulic retention time is short and the treatment effect is heavily affected to the limitation of height. A cross-flow type anaerobic fluidized bed is adopted to replace the traditional up-flow type anaerobic fluidized bed for swine wastewater treatment, the length-width ratio of the cross-flow type anaerobic fluidized bed is 2-10 times, a partition wall is arranged in the middle, guide walls are arranged at the two ends, and a thruster is arranged. The swine wastewater moves in the horizontal direction, so that the hydraulic retention time can be designed as required and is generally5-45 days, the swine wastewater treatment effect is guaranteed, meanwhile, project investment and construction difficulty can be reduced, and operational management is convenient. The technology is suitable for the anaerobic treatment of the swine wastewater with various water volumes and concentrations, and is also suitable for the anaerobic treatment of other organic wastewater, especially, theanaerobic treatment of the organic wastewater with high and medium concentration.

The invention provides a preparation method of magnetic biochar. The preparation method comprises the following steps: crushing biological straws, sieving, cleaning and drying; after the waste iron scraps are cleaned, acid is added for dissolution, and a reaction solution is obtained; adding the dried biological straw into the reaction liquid, fully stirring, carrying out hydrothermal reaction, and sieving the reacted product to obtain a solid product; and washing the solid product with an organic solution for several times, and drying to obtain the magnetic biochar. According to the method, the magnetic biochar is prepared from the straw and the scrap iron, so that the problems that an exogenous additive is high in preparation cost and easy to inactivate and lose are solved, and meanwhile, the anaerobic effect can be well improved.

The invention belongs to a rural pollutant integrative processing system in the field of sewage treatment. The system is composed of a low-energy sewage treatment system and household fermentation equipment. The low-energy sewage treatment system is composed of a sedimentation oil separator, a filler pond, a water storage lifting tank, a self-reaeration biological tank and a constructed wetland bed which are connected in order. The household fermentation equipment is composed of a seepage-proofing pit, a ventilation filling layer and a fermenter. Technical problems such as high cost, substandard treatment and high energy consumption that exist in present rural pollutant processing systems are solved. The rural pollutant integrative processing system provided by the invention has advantages of simple technology, convenient operation, low energy consumption and comprehensive utilization of processed wastewater and refuse.

The invention discloses an anaerobic biological treatment process for treating sewage, which belongs to the technical field of sewage treatment, and comprises the following steps: 1, introducing sewage into a pretreatment tank, and pretreating the sewage by adopting a macromolecular treatment agent; 2, introducing the pretreated sewage into an anaerobic tank, pre-placing a compound microbial agent in the anaerobic tank, adding a carbon source, and carrying out preliminary anaerobic treatment under ultrasonic and irradiation conditions; and step 3, removing irradiation, keeping the ultrasonic condition, and continuing anaerobic treatment to obtain discharge water reaching the standard. According to the invention, microorganisms are coated in the capsules to form the compound microbial agent, so that good conditions are provided for attachment and growth of the microorganisms, and the anaerobic treatment effect of the microorganisms on sewage is effectively promoted; kitchen waste and kitchen garbage are used as an external carbon source, so that waste recycling can be realized, and a new sludge problem which is difficult to treat cannot be caused; defects and defects in the prior art are improved, and the maximum effect of sewage treatment through a biological anaerobic technology is achieved.

The invention discloses a composite anaerobic-aerobic process for treating waste paper making wastewater. The method comprises that: the waste paper making wastewater enters a physicochemical treatment unit, and fibers are recycled; and the water yielded from the physicochemical treatment unit is distributed through an air pipe water distributor at the bottom of a composite anaerobic pool, pollutants are removed by anaerobic granular sludge formed by an active sludge layer at the lower part of the composite anaerobic pool, then the wastewater enters an anaerobic filter layer at the upper partof the composite anaerobic pool and is subjected to decomposition and metabolism by using microbes attached and grown on the surface of a filter material and inside pores, the top of the composite anaerobic pool yields water to an aerobic pool, the water yielded from the aerobic pool enters a sedimentation pool, the sludge and the water are separated, and the supernatant fluid water can be directly discharged and also can be recycled for paper making. By using the anaerobic granular sludge to adsorb small fibers, the method reduces balling of the filter material of the anaerobic filter pool, improves the integral effect of anaerobic treatment, and achieves the aims of steady operation of sewage treatment facilities and reduction of operating cost of sewage treatment.

The invention belongs to a rural pollutant integrative processing system in the field of sewage treatment. The system is composed of a low-energy sewage treatment system and household fermentation equipment. The low-energy sewage treatment system is composed of a sedimentation oil separator, a filler pond, a water storage lifting tank, a self-reaeration biological tank and a constructed wetland bed which are connected in order. The household fermentation equipment is composed of a seepage-proofing pit, a ventilation filling layer and a fermenter. Technical problems such as high cost, substandard treatment and high energy consumption that exist in present rural pollutant processing systems are solved. The rural pollutant integrative processing system provided by the invention has advantages of simple technology, convenient operation, low energy consumption and comprehensive utilization of processed wastewater and refuse.

A method for using anaerobic co-metabolism to treat wastewater of coal chemical industry relates to a method for treating wastewater of coal chemical industry. The invention solves the problems that when anaerobic technology is adopted to treat wastewater of coal chemical industry, start is difficult, initial anaerobic culture is difficult to adapt to wastewater and high-efficiency and stable operation is difficult to realize. The method mainly comprises the following steps of: selecting the wastewater to be treated; taking anaerobic granular sludge as initial seeding sludge source; adopting methanol as co-metabolism substrate and controlling the rate of the total COD (chemical oxygen demand) content of added methanol every day and the total COD content of treated wastewater of coal chemical industry every day between 0.1-0.5; keeping HRT (hydraulic retention time) of 24h; and controlling working conditions to be stable. By using the methanol as the co-metabolism substrate in anaerobically treating the wastewater of coal chemical industry, the method leads anaerobic biochemical property of gas making wastewater to have a dramatic rise, shortens the start time of a reactor, and solves the problem of difficult anaerobic treatment of the wastewater of coal chemical industry. After stable operation, the COD removal ratio of the wastewater of coal chemical industry anaerobic treatment can reach over 50 percent and the removal ratio of total phenol can reach 70-80 percent.

The invention discloses a household processing system for sewage and belongs to the field of sewage processing. The household processing system is composed of a sedimentation oil-separation pool, a filler pool, a storage-water lifting pool, an automatic reoxygenation biological pool and a constructed wetland bed which are in successive connection; the automatic reoxygenation biological pool is inside provided with a filler layer, the pool wall of the automatic reoxygenation biological pool is provided with a reoxygenation pipe and a vent, and the bottom of the automatic reoxygenation biological pool is provided with an aeration pipe; the automatic reoxygenation biological pool is connected with the constructed wetland bed via a perforated water-discharge pipe; and the constructed wetland bed is connected with a reuse water storage pool or is connected with a local surface water body. The household processing system for sewage solves the technological problems that a conventional small-size sewage processing technology cannot enable sewage processing to reach the standard and is relatively large in energy consumption, and the sewage household processing system provided for people is simple in technology, convenient to operate and low in energy consumption, and processed sewage reaches the standard and can be discharged into the water storage pool for agricultural use.

The invention discloses a cage-shaped microbial filler structure. The cage-shaped microbial filler structure is characterized by comprising a cage-shaped shell with holes, the cage-shaped shell is filled with a microbial carrier, and the pore diameter of the cage-shaped shell is smaller than the outer diameter of the microbial carrier; the density of the microbial carrier is in gradient distribution, and the density of the microbial carrier is 0.9-1.0 g / cm<3>; and the density of the cage-shaped shell is 0.9-1.0 g / cm<3>. The cage-shaped microbial filler structure is applied to an anaerobic tank, the sludge amount in an anaerobic reactor can be increased, the defect of uneven sludge distribution is overcome, the utilization rate of anaerobic bacteria is increased, and the sewage treatment efficiency is improved.