36results about How to "Strong impact load capacity" patented technology

The invention provides a fuse SMA (shape memory alloy) wire space connecting and disconnecting mechanism which is provided with a split nut, a tightening spring of the split nut and a release device of the tightening spring, wherein the release device of the tightening spring is two SMA wires, one end of the first SMA wire is connected with the upper end of the tightening spring of the split nut, the other end of the first SMA wire is connected with the upper end of an outer housing, and is tensioned under the action of the tightening spring, one end of the second SMA wire is connected with the other lower end of the tightening spring of the split nut, and the other end of the second SMA wire is connected with the lower end of the outer housing, and is tensioned under the action of the tightening spring. When the two SMA wires are heated by high current, a huge recovery stress is generated caused by the phase change in the two SMA wires, the fracture strength of the material can be reduced caused by high temperature, the two SMA wires are fractured under the combined action of the huge recovery stress and the reduced fracture strength, the restriction on the tightening spring can be released, the two SMA wires are backup mutually, the redundancy design can be realized, and the very high reliability can be guaranteed; and the connecting and disconnecting mechanism is thorough in unlocking, high in reliability, and good in vibration resistance and impact load resistance.

The invention discloses a device for strengthening anaerobic ammonia oxidation and nitrogen removal process. The device comprises a raw-water storage tank, a feed pump, a biochemical reactor and a continuous flow reactor of a sediment tank; the continuous flow reactor is connected with a PLC (programmable logic controller); the biochemical reactor contains an anaerobic zone, an aerobic zone and an anoxic zone; the urban raw-material storage tank is communicated with a water inlet pipe of the biochemical reactor through the feed pump, and sewage is sequentially connected with the anaerobic zone, the aerobic zone, the anoxic zone and the sediment tank through the water inlet pipe; the sediment tank is subjected to sludge and water separation, and a supernatant is discharged as yielding water; in the anaerobic zone, activated sludge absorbs an organic matter synthesized internal carbon source degraded into the water; in the aerobic zone, coupling of short-cut nitrogen removal and anaerobic ammonium oxidation is realized by controlling dissolved oxygen, and nitrogen removal rate of the system is increased.

The invention discloses a biological denitrogenation system for low carbonnitrogen ratio high ammonia-nitrogen chemical engineering synthetic wastewater and a method thereof, and belongs to the environment protective technology field. The method adopts the steps that refractory biodegradable organic matter is decomposed into biodegradable micromolecule organic matter by the water in a distributing reservoir via a first section of A / O processing unit of a hydrolysis and acidification tank, a first aeration tank and a first settling tank through the heterotrophic bacteria culture, organic nitrogen is mineralized, and most of biodegradable organic matter is removed through degrading; then the ammooinacal nitrogen in waste water can be effectively removed by the water via a second section of A / O processing unit of an anoxybiotic tank, a second aeration tank and a second settling tank through the autotrophy type nitrobacter and combining with the heterotrophic bacteria in the anoxybiotic tank. The method has the outstanding advantages and effects that the bruise resistance bearing capacity of the processing system is strong, the refractory biodegradable organic matter in chemical wastewater can be effectively removed, the removing effect is steady, and the removal rate of outflow COD is steadily lower than 100 mg / L; the organic nitrogen and ammonia nitrogen in the chemical wastewater can also be effectively removed, the ammonification rate of the organic nitrogen is larger than or equal to 90 percent, and effluent ammonia nitrogen is steadily lower than 30 mg / L.

The invention discloses an inexpensive sewage treatment method and system. Sewage flows from a sewage pipe into a coarse grid pump station with a coarse grid, large suspended solids and floaters are crushed or blocked in the coarse grid pump station and are fed into an adjustment tank, the suspended solids and sediment are further blocked in the adjustment tank so that water quality and amount areadjusted, the treated water is fed into an A / A / O reactor, the A / A / O reactor reduces the concentrations of COD and ammonia-nitrogen pollutants in the wastewater and feeds the wastewater into a sedimentation reactor, product water precipitated by the sedimentation reactor is fed into a constructed wetland, product water subjected to reduction of the concentrations of COD and ammonia-nitrogen pollutants is disinfected and the wastewater satisfying the standards is discharged. The system has strong water quality impact load resistance and a high automation degree, produces product water with stable quality reaching to or better than the level A, realizes a low investment and operation cost and is suitable for treatment on wastewater in small and medium-sized water use townships with a high groundwater level, deeper depth of the buried wastewater inlet pipe and high product water requirements.

The invention discloses a method for treating sewage of scattered village peasant households by aquatic animal and plant purification pond, and belongs to the technical field of environment protection. The method mainly aims at the difficult problem of water pollution caused by sewage discharge from scattered village peasant households in south rural areas of China, based on surrounding topographic conditions of villages, creeks or ponds, to which sewage of scattered peasant households is discharged, are used as treatment carriers, and by planting aquatic plants, adding benthonic animals and arranging artificial seaweeds, a purification pond based on aquatic animals and plants and artificial seaweeds is built. The treatment method can realize in-situ sewage purification without building sewage collection pipe networks and sewage treatment facilities, not only has good treatment effect and low cost of construction, but also spends no operating cost, occupies no cultivated land, is convenient to maintain and has remarkable benefit of ecological environment.

The invention provides a coal mine domestic wastewater treatment device and a treatment method. The coal mine domestic wastewater treatment device comprises a grille well, an adjustment tank, a pre-sedimentation tank, and a simultaneous biological oxidation tank (SBOT), wherein the grille well, the adjustment tank, the pre-sedimentation tank, and the SBOT are orderly communicated along a coal mine domestic wastewater flow direction. The SBOT is separated into N little tanks along a direction perpendicular to the bottom of the SBOT. Each one of the N little tanks is provided with an upper flowchannel, carriers intercepted by an upper carrier interception grille and a lower carrier interception grille and a lower flow channel close to the bottom of the SBOT, wherein an aerated pipe is arranged between the lower carrier interception grille and the lower flow channel and a dredge pipe is arranged at the bottom of the SBOT and is communicated with the outside environment. The coal mine domestic wastewater treatment device and the treatment method can effectively reduce the content of organic matters in coal mine domestic wastewater, the content of ammonia nitrogen in coal mine domestic wastewater and the content of total nitrogen in coal mine domestic wastewater, avoid the use of a secondary sedimentation tank and an activated sludge backflow system, greatly simplify coal mine domestic wastewater treatment processes, and reduce coal mine domestic wastewater treatment device costs.

The invention discloses a pre-treating method of desalination of sea water and the device thereof. The pre-treating method pre-treats sea water by employing cooperated sterilization of ozone-ultraviolet ray, intensified coagulation and precipitation integration. The following steps are followed in order: sterilization phase, intensified coagulation phase, precipitation phase, desalination phase and mud discharging phase. The device mainly includes sterilizing and a touching apparatus in series, a medical adding and blending apparatus, a flocculating apparatus, a depositing apparatus, a water outlet groove and a mud discharging pump. The invention has the advantages that by using the method of cooperated sterilization of ozone-ultraviolet ray, intensified coagulation and precipitation integration, impact loading capacity of the anti-water quality and quantity is stronger, the operation is more stable and reliable, the disposal cost is more economical, which can be used in large scale and has good water quality of outlet water. Cooperated sterilization of ozone-ultraviolet ray can well prevent the formation of the by-product by sterilization in the water and the appearance of the microorganism in the water after sterilization, which effectively resolves the problems of large quantity of adding dosage and long reacting time existing in conventional sterilization method.

The invention relates to a process for removing thallium through microelectrolysis treatment of thallium-containing heavy metal wastewater. The process comprises a microelectrolysis part, a neutralization coagulation part and a sulfuric acid back adjustment part. The microelectrolysis treatment on the thallium-containing wastewater is performed through a high-activity microelectrolysis packing, and pretreatment thallium removal is performed; then the wastewater after microelectrolysis pretreatment thallium removal is subjected to acid-base adjustment and is adjusted to be alkaline, then a thallium removal agent and a flocculant are added successively, solid-liquid separation is performed through an inclined plate sedimentation tank, and thallium and heavy metal ions are removed; and finally sulfuric acid is used for adjusting and purifying water to be neutral, and then the wastewater is directly discharged to the outside. The process can effectively improve the removal rate of thallium and other heavy metal ions in the heavy metal wastewater, and prevents and controls the pollution of thallium and other heavy metal elements to a water environment.

The invention discloses an anti-explosion transparent partition mounting structure. The anti-explosion transparent partition mounting structure comprises a partition body fixed on a building body, a circle of mounting frame is bonded around the partition body which is fixed on the main building body or an adjacent partition body via the mounting frame, the mounting frame comprises a pressing assembly and a fastening assembly, and the pressing assembly is matched with the fastening assembly to press the same to generate prestressing force so as to fasten the partition body. By the aid of the mounting frame, the partition body cannot be separated after being impacted by explosion and the like, so that anti-explosion and separation functions are effectively realized, and indoor persons are protected to the greatest extent. Since a rigid bearing frame is firmly connected with the main building body structure, strength and rigidity of a whole partition bearing system are greatly improved, and the anti-explosion transparent partition structure is stronger in capability for bearing impact loads from explosion and the like and better in safety performance.

The invention discloses a method for deeply treating wastewater containing ammonia nitrogen. The method includes the following steps that zeolite and solid filter materials form a filter material layer based on a volume ratio of (1-2): (2-1) in a filter tank, biochemical secondary effluent containing the ammonia nitrogen or ammonia nitrogen wastewater containing low chemical oxygen demand (COD) is guided into the filter tank, nitrobacteria or activated sludge is added into the filter tank, a biochemical reaction is performed, and water body is discharged. The method for deeply treating the wastewater containing the ammonia nitrogen has the advantages that the capacity of resistance to ammonia nitrogen impact load is high, a continuous operation is achieved, the biological solid carrying capacity is large, the zeolite filter material can be efficiently bio-regenerated, and the ammonia nitrogen removing effect is stable and the like, and the method can be widely applied to the deep treatment of the wastewater containing ammonia nitrogen.

The invention discloses a multistage anaerobic reaction device which comprises a first stage reaction tank, a second stage reaction tank and a third stage reaction tank which are arranged in sequence and connected end to end, wherein the first stage reaction tank is provided with a stirring rank, the second stage reaction tank is provided with a stirring tank and / or a filler tank and the third stage reaction tank is provided with a filler tank; or the second stage reaction tank is provided with more than two stirring tanks and / or filler tanks connected end to end in series; a clapboard is arranged above each stirring tank and a stirring pump is arranged below the clapboard; and a clapboard is arranged in each filler tank and filler is arranged on the clapboard. By adopting the device disclosed by the invention, the gas producing efficiency of methane can be effectively improved.

The invention discloses an integrated sewage purifying apparatus with a detection system. The apparatus comprises a shell, a water inlet center cylinder, a circulation device and an aeration device, the shell is a cylindrical structure, the bottom of the shell is welded with a mud bucket, the mud bucket is a conical body, the bottom of the mud bucket is provided with a mud collecting pit, and a mud discharging tube is arranged under the mud collecting pit; the side surface of the upper part of the shell is provided with a water inlet tube and a water outlet tube; a channel steel frame is arranged in the shell, the channel steel frame is a groined channel steel welding frame, and the outer side of the channel steel frame is welded to the inner wall of the shell; and a water inlet center cylinder is vertically arranged in the channel steel frame, the water inlet center cylinder is fixedly connected with the channel steel frame, the water inlet center cylinder communicates with the water inlet tube, a rotating shaft is coaxially arranged at the center of the water inlet center cylinder, and the upper part of the rotating shaft is connected with a gear motor shaft. The apparatus has the advantages of small occupied area, small height, low investment cost, thoroughness in mud discharge, no mud dead angle, simplicity and convenience in running and maintaining, and high wastewater inlet impact load resistance.

The invention relates to a flue gas desulfurization system for a zinc smelting process. The system comprises a zinc oxide ore pulp manufacturing part, a primary desulfurization part, a secondary desulfurization part and a tertiary desulfurization part. The zinc oxide ore pulp manufacturing part: zinc scum after casting is subjected to ball milling, the metal zinc in the zinc scum is separated, thezinc scum is subjected to a fluorine and chlorine removal process until the fluorine content is not more than 0.1% and the chlorine content is not more than 0.3% in the zinc scum, slurrying is performed in a slurry tank, and then zinc oxide is further refined through a vertical grinding process to form a zinc oxide ore pulp. The primary desulfurization part: the prepared zinc oxide ore pulp is sprayed into a primary absorption tower and reacts with sulfur dioxide in the washed flue gas of the zinc smelting system, the formed zinc sulfite pulp liquid after reaction is concentrated, the supernatant is discharged into an aerated oxidation tank, the bottom flow is subjected to filtration and the filtrate is discharged into the aerated oxidation tank, the solution after oxidation by the aerated oxidation tank is returned to the slurry tank of the zinc oxide ore pulp manufacturing part for cyclic utilization, when the concentration of zinc ion in the solution reaches to be 150 g / L, the solution is fed to a zinc purification system for further treatment, and the filter residue is sent to a zinc sulfite material bin and is subjected to the comprehensive recovery of zinc after the collocation treatment with other zinc-containing materials. The process does not produce harmful waste gas, waste residue and waste water.

The invention relates to a flue gas desulfurization process of a zinc smelting system. The flue gas desulfurization process includes separating metal zinc from zinc dross after ball-milling of the zinc dross, and subjecting dross powder to defluorination and dechlorination until the fluorine content and the chlorine content in the zinc dross are not more than 0.1% and 0.3% respectively; performingpulping by a pulping tank, and further grinding zinc oxide after a vertical milling process to form ZnO ore pulp; spraying the prepared ZnO ore pulp into an absorption tower for primary desulfurization, secondary desulfurization and tertiary desulfurization. The flue gas desulfurization process has the advantages of high desulfurization efficiency, less proneness to clogging of nozzles and pipelines, low medicament cost and high resistance to sulfur dioxide impact load.

The invention relates to a flue gas desulfurization process used for a zinc smelting system. The process comprises the following steps: preparing ZnO slurry: after zinc scum is casted, performing ballmilling, separating metal zinc, performing defluorination and dechlorination on the scum powder until the fluorine content is not more than 0.1% and the chlorine content is not more than 0.3% in thezinc scum, performing slurrying in a slurrying tank, allowing the obtained slurry to enter a vertical mill process, and further grinding the zinc oxide to form ZnO slurry; performing first-stage desulfurization: spraying a prepared ZnO slurry into a first-stage absorption tower, and reacting the ZnO slurry with sulfur dioxide in washed zinc smelting system flue gas; performing second-stage desulfurization, and performing third-stage desulfurization. The process is characterized in that zinc sulfite slurry formed after the reaction is concentrated, the supernatant is discharged into an aerationoxidation tank, after the bottom stream is filtered, the filtrate is discharged into the aeration oxidation tank, the solution obtained by oxidation in the aeration oxidation tank returns to the slurrying tank in the ZnO slurry preparation part for recycling, after a zinc ion concentration in the solution reaches 150 g / L, the material is sent to a zinc purification system for further treatment without deposition, and the filter residues are sent to a zinc sulfite bin to be treated together with other zinc-containing materials for comprehensive recovery of zinc. The process provided by the invention has no harmful waste gas, waste residues or waste water.

The invention relates to a continuous filtering device adopting an up-flow type flowing bed and a filtering method. In a conventional three-phase treatment process, for a coagulating basin and a sedimentation basin in conventional two-stage biochemical treatment, deep treatment is performed on effluent of the secondary sedimentation basin after active sand is indirectly arranged behind a secondarysedimentation basin, and then process facilities such as the coagulating basin and the sedimentation basin need to be specifically arranged. Coagulant cannot be directly fed in a water inlet pipelineor channel, active sand process work amount and investment are relatively high, and operation and maintenance cost are high. The continuous filtering device adopting an up-flow type flowing bed comprises a shell, wherein the shell is connected with a raw water inlet (2), a sand washing sewage outlet (3) and a pure water outlet (9) respectively, dirty sand (11), a sand bed (5) and a sand pouring hopper (7) are arranged in the shell, and the sand pouring hopper is formed by welding a sector structural member and a conical structural member. The device and the method are applied to the field ofdrinking water, industrial water, advanced sewage treatment and reclaimed water reuse treatment.

The invention discloses an efficient hardness removal device for high-concentration industrial waste liquid treatment and a method thereof. The hardness removal device comprises a water inlet pipelinemixer, a dosing device, a water outlet pipeline mixer and a primary settling separation tank. The hardness removal method comprises the following steps: pretreated high-hardness wastewater enters a central cylinder of a primary settling separation tank through a water inlet pipeline and a water inlet pipeline mixer; adding a medicament into the water inlet pipeline mixer, reacting, flowing into the central cylinder of the first-stage settling separation tank, and discharging settled substances into a sludge concentration tank through a sludge discharging machine for solid-liquid separation; flowing a supernatant into the annular overflow groove from the edge of the top of the annular overflow groove and then flowing into the water outlet pipeline mixer through the overflow water outlet ofthe primary settling separation tank. Compared with a traditional stirring and step-by-step sedimentation separation hardness removal device, the investment of conventional treatment equipment is nearly 7 times that of the device, the construction investment and the construction area are greatly reduced, the chemical adding amount is reduced, and the production cost is greatly reduced.

The invention discloses a hydraulically powered mine axial flow ventilation fan. The hydraulically powered mine axial flow ventilation fan comprises an outer shell and an impeller, and further comprises an inner cylinder body, a hydraulic motor, a motor supporting seat and an adapter shaft. A flow guiding cover is arranged at the air inlet end of the fan. The inner cylinder body is fixedly connected to the inner part of the outer shell by a web direction rib plate, one end of the motor supporting seat is fixed to the end part of the air inlet end of the inner cylinder body through a bolt assembly, and the hydraulic motor is fixed to the other end part of the motor supporting seat through a bolt assembly. The shaft extending end of the hydraulic motor extends into an inner hole of the motorsupporting seat and then is connected with the adapter shaft through a flat key or a spline. The adapter shaft is fixed into a bearing box, at the geometric center of the outer shell, of the inner cylinder body through more than two bearings, and the other end of the adapter shaft is connected with an impeller shaft hole through a flat key or a spline. The hydraulic motor is connected with an oilreturn pipe and an oil inlet pipe, and the oil return pipe and the oil inlet pipe are connected to a hydraulic station through a hydraulic control valve after penetrating through the outer shell. Thehydraulically powered mine axial flow ventilation fan has a compact structure, large torque, light weight, low noise, a long service life and convenient maintenance.

The invention discloses a continuous up-flow type active sand filter treatment device and filter method. A coagulation pond and a sedimentation pond in a traditional three-section type treatment process are used in a conventional secondary biochemical treatment, active sand is arranged indirectly behind a secondary sedimentation pond and is used for deep treatment of effluent of the secondary sedimentation pond, and the coagulation pond, a clarifying pond and other process facilities require to be arranged dedicatedly; a coagulant cannot be directly added in a water inlet pipeline or channel, the active sand technology project amount and investment are relatively high, and operation and maintenance costs are high. The continuous up-flow type active sand filter treatment device comprises a housing (1); the housing is respectively connected with a raw water inlet (2), a sand washing sewage outlet (3) and a purified water outlet (9); the housing is internally provided with dirty sand (11), a sand bed (5) and a sand pouring hopper (7); and the sand pouring hopper is welded by a fan-shaped structural member and a tapered structural member. The continuous up-flow type active sand filter treatment device and filter method are applied to the fields of deep treatment of drinking water, industrial water and sewage, and reclaimed water reuse treatment.

The sewage flow with three different biological unit successively which are anaerobic unit, anoxic unit and aerobic unit. The time which sewage stay the unit are 2.5-3.9h, 2.5-3.5h and 6.0-7.5h respectively. He sludge age is 15-20 days, the mixture fluid returning ratio is 100%-20%. The sludge returning ratio is 100%. To determine the toxin of import and export waster water in the method of determination of acute aoxicity. So the toxin reduction ratio reach to 82% compared to the method of slued treatment, it is improved 20%-50%. The technology can also remove the N and P, the removal rate of N is 90.05%, the BOD is 81.25% and the SS is 77.17%. The effluent quality can meet all the routine standard and decrease the loading rate in the following treatment. The decreasing rate of toxin is used to access a biological treatment firstly in invention and the invention also provide a economical and efficiently method to resource the city wastewater.

The invention discloses a pre-treating method of desalination of sea water and the device thereof. The pre-treating method pre-treats sea water by employing cooperated sterilization of ozone-ultraviolet ray, intensified coagulation and precipitation integration. The following steps are followed in order: sterilization phase, intensified coagulation phase, precipitation phase, desalination phase and mud discharging phase. The device mainly includes sterilizing and a touching apparatus in series, a medical adding and blending apparatus, a flocculating apparatus, a depositing apparatus, a water outlet groove and a mud discharging pump. The invention has the advantages that by using the method of cooperated sterilization of ozone-ultraviolet ray, intensified coagulation and precipitation integration, impact loading capacity of the anti-water quality and quantity is stronger, the operation is more stable and reliable, the disposal cost is more economical, which can be used in large scale and has good water quality of outlet water. Cooperated sterilization of ozone-ultraviolet ray can well prevent the formation of the by-product by sterilization in the water and the appearance of the microorganism in the water after sterilization, which effectively resolves the problems of large quantity of adding dosage and long reacting time existing in conventional sterilization method.

The invention discloses a biological denitrogenation system for low carbonnitrogen ratio high ammonia-nitrogen chemical engineering synthetic wastewater and a method thereof, and belongs to the environment protective technology field. The method adopts the steps that refractory biodegradable organic matter is decomposed into biodegradable micromolecule organic matter by the water in a distributingreservoir via a first section of A / O processing unit of a hydrolysis and acidification tank, a first aeration tank and a first settling tank through the heterotrophic bacteria culture, organic nitrogen is mineralized, and most of biodegradable organic matter is removed through degrading; then the ammooinacal nitrogen in waste water can be effectively removed by the water via a second section of A / O processing unit of an anoxybiotic tank, a second aeration tank and a second settling tank through the autotrophy type nitrobacter and combining with the heterotrophic bacteria in the anoxybiotic tank. The method has the outstanding advantages and effects that the bruise resistance bearing capacity of the processing system is strong, the refractory biodegradable organic matter in chemical wastewater can be effectively removed, the removing effect is steady, and the removal rate of outflow COD is steadily lower than 100 mg / L; the organic nitrogen and ammonia nitrogen in the chemical wastewater can also be effectively removed, the ammonification rate of the organic nitrogen is larger than or equal to 90 percent, and effluent ammonia nitrogen is steadily lower than 30 mg / L.

The invention provides a fuse SMA (shape memory alloy) wire space connecting and disconnecting mechanism which is provided with a split nut, a tightening spring of the split nut and a release device of the tightening spring, wherein the release device of the tightening spring is two SMA wires, one end of the first SMA wire is connected with the upper end of the tightening spring of the split nut, the other end of the first SMA wire is connected with the upper end of an outer housing, and is tensioned under the action of the tightening spring, one end of the second SMA wire is connected with the other lower end of the tightening spring of the split nut, and the other end of the second SMA wire is connected with the lower end of the outer housing, and is tensioned under the action of the tightening spring. When the two SMA wires are heated by high current, a huge recovery stress is generated caused by the phase change in the two SMA wires, the fracture strength of the material can be reduced caused by high temperature, the two SMA wires are fractured under the combined action of the huge recovery stress and the reduced fracture strength, the restriction on the tightening spring can be released, the two SMA wires are backup mutually, the redundancy design can be realized, and the very high reliability can be guaranteed; and the connecting and disconnecting mechanism is thorough in unlocking, high in reliability, and good in vibration resistance and impact load resistance.

The invention discloses a multistage anaerobic reaction device which comprises a first stage reaction tank, a second stage reaction tank and a third stage reaction tank which are arranged in sequence and connected end to end, wherein the first stage reaction tank is provided with a stirring rank, the second stage reaction tank is provided with a stirring tank and / or a filler tank and the third stage reaction tank is provided with a filler tank; or the second stage reaction tank is provided with more than two stirring tanks and / or filler tanks connected end to end in series; a clapboard is arranged above each stirring tank and a stirring pump is arranged below the clapboard; and a clapboard is arranged in each filler tank and filler is arranged on the clapboard. By adopting the device disclosed by the invention, the gas producing efficiency of methane can be effectively improved.

The sewage flow with three different biological unit successively which are anaerobic unit, anoxic unit and aerobic unit. The time which sewage stay the unit are 2.5-3.9h, 2.5-3.5h and 6.0-7.5h respectively. He sludge age is 15-20 days, the mixture fluid returning ratio is 100%-20%. The sludge returning ratio is 100%. To determine the toxin of import and export waster water in the method of determination of acute aoxicity. So the toxin reduction ratio reach to 82% compared to the method of slued treatment, it is improved 20%-50%. The technology can also remove the N and P, the removal rate of N is 90.05%, the BOD is 81.25% and the SS is 77.17%. The effluent quality can meet all the routine standard and decrease the loading rate in the following treatment. The decreasing rate of toxin is used to access a biological treatment firstly in invention and the invention also provide a economical and efficiently method to resource the city wastewater.