93results about How to "Improve nitrification efficiency" patented technology

The invention provides a high-efficiency denitrification mixed bacterial agent and application thereof, and a novel bacterial strain capable of efficiently denitrifying obtained by screening. The high-efficiency denitrification mixed bacterial agent consists of CCTCC No:M 2010001 and nitrosobacteria CCTCC No:M 2010002. The invention mainly has the advantages of providing a high-efficiency denitrification mixed bacterial agent, greatly improving the efficiency for treating sewage, not causing secondary pollution, and having significance for improving ecological environment.

The invention discloses a membrane bio-reactor (MBR) used for treating preserved szechuan pickle wastewater and reinforcing biological phosphorous and nitrogen removal. An integrated reactor is formed by an A<2> / O process, a biological membrane process and the MBR. The MBR comprises an anaerobic tank, an anoxic tank, an aerobic tank, a feeding system, an aerating system, a drainage system and automatic control equipment, wherein semi-soft biological membrane fillers are put in the anaerobic tank, the anoxic tank and the aerobic tank; a membrane component is put in the aerobic tank, and a membrane separation region is not independently arranged. The reactor has the advantages that anaerobic phosphorus release and phosphorus accumulation in the aerobic tank are carried out via the sludge on the biological fillers in the anaerobic tank, thus increasing the total removal rate of phosphorus in the sewage; organic matters undergo hydrolytic acidification and organic nitrogen is aminated after the preserved szechuan pickle wastewater passes through the anaerobic tank; nitrification liquor in the aerobic tank flows back to the anoxic tank to form denitrification in the anoxic tank. The MBR has a simple structure and high pollutant treatment efficiency, is light in membrane pollution, and can simultaneously treat the pollutants such as organic matters, total nitrogen, total phosphorus, SS and the like of high salinity wastewater.

An aerating biologic filter pool with dual layers of filter material for treating sewage is characterized by that two filter materials with different granularities are used, middle discharge tubes with water holes are arranged between two filter layers, and air and water are alternatively used for flushing. Its advantages are both decarbonating and nitrifying functions, high effect, simple system and low cost.

The invention relates to an integrated sewage treatment device with high efficiency and low consumption and a treatment method, and belongs to the field of sewage treatment. The integrated sewage treatment device comprises a pretreatment unit, a multi-oxidation-deoxidation environment coupling biological reaction pond unit and a deep treatment unit sequentially connected. The multi-oxidation-deoxidation environment coupling biological reaction pond unit adopts a three-stage anoxia-aerobiotic alternating reaction pond filled with a circular composite glass ball porous microbial carrier. The deep treatment unit comprises a filter cloth dynamic film biological reaction pond and first and second dynamic films. Sewage is treated through the devices sequentially. The device provided by the invention cannot only remove carbon containing organic matters, but also has good nitrogen and phosphorus removal capacity.

The invention discloses a nitration denitrificatoin and filter method and a nitration denitrification and filter device for a double-sludge series-connection aeration biofilter. The nitration denitrification and filter device is mainly composed of a water inlet system, a first section aeration biofilter, a second section aeration biofilter and a clean water tank, wherein the first section aeration biofilter is divided into a denitrification zone and a decarburization zone, suspended biological carriers serving as fillers are arranged in the denitrification zone, the second section aeration biofilter is connected with the decarburization zone of the first section aeration biofilter through a gas-water separator arranged in a middle water layer, and the second section aeration biofilter is divided into a nitration zone and a nitration deoxidization filter zone. The nitration denitrification and filter method comprises that denitrification and aerobic decarburization of waste water are respectively achieved through the denitrification zone and the decarburization zone of the first section aeration biofilter, ammonia nitrogen is converted into nitrate nitrogen through the second section aeration biofilter, electron acceptors are provided for the denitrification zone of the first section aeration biofilter, and chemical oxygen demand (COD), nitrogen (N) and suspended solid (SS) areremoved. The system nitration denitrificatoin and filter method and the nitration denitrification and filter device for the double-sludge series-connection aeration biofilter can achieve function separation of denitrification, decarburization and nitration and have the advantages of saving energy, being stable and denitrifying efficiently.

The invention discloses a dual-sludge denitrification dephosphorizing and denitrifying A / A-O device which mainly comprises a primary precipitation pool, an anaerobic-anoxic device, a secondary precipitation pool, a middle pool, a biological aerated filter and a clear water pool, wherein the primary precipitation pool is connected with an anaerobic zone of the anaerobic-anoxic device, a degassing zone of the anaerobic-anoxic device is connected with the secondary precipitation pool, and the secondary precipitation pool is connected with the anaerobic zone of the anaerobic-anoxic device througha sludge pump; the outflow water of the secondary precipitation pool is connected to the middle pool, the middle pool is connected with the biological aerated filter, and the biological aerated filter is connected with the clear water pool; and the clear water pool is connected with the anaerobic-anoxic device. By the process adjustment, denitrifying phosphorus accumulating bacteria becomes dominant bacteria of an AAO unit. The dual-sludge denitrification dephosphorizing and denitrifying A / A-O device realizes the separation of phosphorus accumulating bacteria and nitrobacteria, the separationof the precipitation function and the sludge storage function of the secondary precipitation pool, and the separation of the nitrification function and the filtering function of the biological aerated filter, thereby realizing energy conservation of a combined system, stability and efficiency in denitrification and dephosphorization, and sludge reduction.

The invention relates to a series-type two-stage three-section aeration biofilter comprising an influent distributor pipe, an air input distributor pipe, an effluent pipe and filter materials in the cell body of the filter characerized in that the filter mainbody consists of a waste water pool, filters I, II and a back washing system, wherein a supporting layer 1 is arranged in the filter I as the bottom, a bio-filler layer 2 is arranged on the supporting layer 1, an aerated conduit 4 is arranged in the bio-filler layer 2; another supporting layer 1 is arranged in the filter II as the bottom, a bio-filler layer 3 is arranged on the supporting layer 1, an aerated conduit 5 is arranged in the bio-filler layer 3, and is branched to three section aerated conduits 6, 7, 8; the back washing system consists of an air compressor, a back washing drainage pipe 9 and a drainage pipe 10 after the waste water treatment. The device of the invention can improve the removal performance of the COD and ammonia nitrogen of the system using a lower running cost.

The invention provides a sludge drying sewage treatment system comprising a typical biochemical treatment process and a membrane bioreactor (MBR). The biochemical treatment process is a front denitrification biological nitrogen removal process capable of generating a backflow, and a front-section anoxic tank and a rear-section aerobic tank are connected in series in the process. An immersed MBR technology is adopted by the MBR, a biological treatment technology and a membrane separation technology are organically combined to realize efficient biological treatment under a high-concentration active sewage treatment condition, and the floor area is remarkably reduced. Due to the physical separation effect of a membrane, high-quality effluent is obtained, and the effluent is kept to be completely up to the standard. The process is simple and clear in combination, short in flow process as well as stable and reliable in effect, and has strong pertinence for the water quality characteristic of sludge drying sewage.

The invention discloses a device and a method for processing C / N urban household wastewater by an A2O-BAF (Biological Aerated Filter) process. The device comprises a water inlet tank, an A2O reactor, a secondary sedimentation tank, an intermediate water tank, a BAF reactor and a water outlet tank connected in sequence. Raw water and return sludge are pumped from the water inlet tank to an anaerobic zone; mixed liquor in the anaerobic zone and nitration liquor enter in the anaerobic zone; the mixed liquor in the anaerobic zone then enters in an aerobic zone; mixed liquor from the A2O enters in the intermediate water tank; supernate is pumped from the intermediate water tank to the BAF; sludge in the secondary sedimentation tank reflows to the anaerobic zone; the separated supernate enters in the BAF in which effluents water enters in the water outlet tank; and part of water in the water outlet tank reflows to an anoxic zone and the other part is discharged. The invention reduces the aeration amount, saves carbon sources, effectively improves the nitration and prolongs the backwashing time of the BAF.

The invention relates to an A2 / O-bio-contact oxidation device and method based on coupling of partial nitrification and denitrifying phosphorous removal and belongs to the field of biological treatment of sewage. The device mainly comprises an A2 / O reactor (comprising an anaerobic zone, an anoxic zone and an aerobic zone), a wobble plate sedimentation tank, a biological contact oxidation tank and a sedimentation zone, wherein the aerobic zone of the A2 / O reactor is connected with the wobble plate sedimentation tank by virtue of an overflow baffle, the wobble plate sedimentation tank is connected with the biological contact oxidation tank, and the biological contact oxidation tank is connected with the sedimentation zone; filler made from carbon fibers is arranged in the biological contact oxidation tank and is mainly used for completing partial nitrification; a sludge reflux pump is communicated with the bottom of the anaerobic zone of the A2 / O reactor, a nitrification liquor reflux pump is connected with an effluent tank and the anoxic zone of the A2 / O reactor to realize denitrifying phosphorus removal. The A2 / O-bio-contact oxidation device and method fully take advantages of partial nitrification and denitrifying phosphorous removal and have the advantages of conservation of carbon source, low aeration rate, low sludge yield and the like.

The invention relates to a method for deep treatment of ammonian sewage, and the method belongs to the technical field of the environment protection. The invention conducts integration and innovation based on the traditional ammonian sewage treatment method and combines the physical, chemical and biological treatments, namely, an improved oxygen-poor and aerobic technique, film separation and biological treatment are adopted in the treatment of the eutrophic water which is low in BOD5, and then the eutrophic water is discharged or reused after the treatment under the standard. The invention has the advantages of low capital construction and work, good water treatment, no secondary pollution and state discharge standard conformity of the discharged water, etc., thereby being widely used in the treatment of the eutrophic water with the density of the BOD5 being 48.5mg / L.

A process for treating the sewage containing high-concentration organic substance and ammoniacal nitrogen includes such steps as stage-one anaerobic treating to transform the organic substance in sewage to marsh gas, stage-two anaerobic treating to transform the organic substance, ammonia-state nitrogen and nitric acid-state nitrogen to marsh gas and nitrogen respectively, aerobic treating to transform the organic substance and ammonia-state nitrogen to CO2, H2O and nitric acid-state nitrogen, depositing, and returning part of supernatant back to stage-two anaerobic treating unit.

The invention discloses a device and method for coupling short-cut nitrification with double-SBR denitrifying phosphorus removal, and belongs to the field of biological sewage treatment. The device comprises a raw water tank, two A2 / O-SBR reactors, and an N-SBR reactor. The method comprises the following steps: firstly, raw water enters the A2 / O-SBR reactor I to perform the reaction of anaerobic phosphate release, the reactants stand to generate sediments, and water is discharged into the N-SBR reactor so as to perform short-cut nitrification; after the reaction of the short-cut nitrification ends, the nitrifying liquid flows back to the A2 / O-SBR reactor I so as to perform the reaction of anoxic denitrifying phosphorus removal; after the reaction of anoxic denitrifying phosphorus removal ends, transient aeration is performed so as to further perform aerobic phosphorus uptake and blow off nitrogen; after the reactions end, static settlement and water discharging are performed; after the reaction of the short-cut nitrification in the N-SBR reactor ends, and static settlement and water discharging are finished, the A2 / O-SBR reactor II is started, and because the running manner of the A2 / O-SBR reactor II is the same as that of the A2 / O-SBR reactor I, the vacancy rate of the N-SBR reactor can be lowered. The device and method, which are disclosed by the invention, can save the energy and lower the consumption, and have the advantages that the sludge yield is low, the content of suspended matters in discharged water is low, the technology is simple, the layout is compact, and the device and the method are suitable for processing low-C / N domestic sewage.

The invention discloses real-time control system and method for short-cut nitrification and coupled double-SBR denitrifying phosphorus removal, belonging to the field of biological sewage treatment. The system comprises a raw water tank, two A<2> / O-SBR reactors, an N-SBR reactor, a PLC control cabinet and a computer. The method comprises the following steps of flowing raw water into the A<2> / O-SBR reactor to be subjected to an anaerobic phosphorus release reaction and then entering discharged water into the N-SBR reactor to be subjected to short-cut nitrification, wherein the nitrification process is controlled through the output of the computer; after the reaction is over, flowing nitrification liquid back into the A<2> / O-SBR reactor I to be subjected to an anaerobic denitrifying phosphorus removal reaction; after the anaerobic denitrifying phosphorus removal reaction is finished, performing aeration for a while, and then performing static settling and water draining so as to adjust the volume exchange ratio, the reaction time and the aeration quantity accordingly; after the reaction in the N-SBR reactor is finished, starting the A<2> / O-SBR reactor II of which the operation mode is the same as the A<2> / O-SBR reactor I, so that the vacancy rate of the N-SBR reactor can be reduced. The system and the method have the advantages that on-line real-time control is adopted, system operation is optimized, the degree of automation is high, the controllability is good, and deep nitrogen and phosphorus removal of low-C / N domestic sewage can be realized.

A process for treating city sewage by denitrating, removing phosphorus and dnitrifying includes 8 steps including inputting raw sewage in reactors A and B alternatively by 4 hr, anaerobic circulating in A and B for 2 hrs in order to release phosphorus, laying A aside for 0.5 hr, discharging its supernatant in B, etc. Its advantages are use of denitrating phosphorus-collecting bacteria for removing phosphorus and nitrogen, and high treating effect.

The invention discloses a nitrogen and phosphorus removal system and a method for treating low-carbon-nitrogen-ratio domestic wastewater by an A2O-MBBR (anaerobic-anoxic-oxic-moving bed biofilm reactor) combined chemical process, belongs to the field of city wastewater treatment and regeneration, and solves the problem of poor nitrogen and phosphorus removal effect of an existing water purification process for treating the low-carbon-nitrogen-ratio domestic wastewater. The nitrogen and phosphorus removal system comprises an A2O reactor, an intermediate settling pond, an MBBR, a chemical phosphorus removal pond and a final settling pond. According to the method, the MBBR is arranged behind the intermediate settling pond, a nitrifying process is finished, and an inorganic metal salt agent is added into the chemical phosphorus removal pond; all active sludge subjected to standing and settling by the chemical phosphorus removal pond flows back to the A2O reactor, so that the number of phosphorus-accumulating bacteria cannot be reduced; then, electron acceptors are provided for the denitrifying effect and the anoxic phosphorus uptake effect by flowing part of outlet water of the MBBR back to an anoxic zone of the A2O reactor. By the nitrogen and phosphorus removal system, the removal rate of ammonia nitrogen and total phosphorus can reach more than 90%.

The invention belongs to the technical field of sewage treatment and particularly relates to an asphalt production wastewater treatment process, which includes the following steps: collecting asphaltproduction wastewater through a pipe network in a plant area and feeding the wastewater into a wastewater treatment system, lifting the wastewater to a regulation and oil removal tank to remove floating oil and sludge in the wastewater; feeding the floating sludge into a sludge treatment system; and treating the wastewater through the regulation and oil removal tank, a loading coagulation oil remover, a balancing tank, a coagulation and flocculation floatation tank, a secondary settlement tank, a pre-ozone contact tank and an aeration bio-filter tank, so that generally, the pollutant indices of the discharged water from the aeration bio-filter tank can reach standards, and then the water can be fed into a clear water tank. The method can increase removal rate of SS and COD in the asphalt production wastewater, so that the asphalt production wastewater can reach emission standard and environment pollution is reduced.

An advanced treatment recovery technology of coking wastewater comprises the steps of sequentially implemented air floatation oil removal pretreatment, acidifying treatment, denitrification treatment and biodegradation treatment, and also comprises the following steps: 1, processing biodegraded wastewater by using an inorganic membrane filtering device, reusing parts of the obtained membrane filtrate as mineral separation process water, and allowing the residual membrane filtrate to enter a pollution resistant reverse osmosis membrane device to carry out desalination treatment; and 2, pumping the membrane filtrate obtained in step 1 into the pollution resistant reverse osmosis membrane device to carry out desalination treatment in order to remove COD, NH3-N and inorganic salts in water, and directly reusing the obtained membrane permeation liquid as circulating cooling water. The technology adopting an inorganic membrane to carry out the reverse osmosis pretreatment can solve the problems of no pollution resistance and unlikely dirt obstruction of an ultrafilter membrane, and no flocculating agent or a small amount of the flocculating agent is added by adopting inorganic membrane feeding, so the reverse osmosis pollution degree is reduced, thereby the cleaning period of the RO (reverse osmosis) membrane is prolonged, the cleaning effect is good, and the irreversible dirt obstruction of the RO membrane is avoided.

The embodiment of the invention discloses a sewage treatment method and a sewage treatment system of a combined dynamic membrane bioreactor, and is used for maintaining high-efficiency activated sludge and relatively high nitrification efficiency and improving the probability of pollutant removal. The method comprises the following steps: combining a regulating tank with an anaerobic tank throughan anaerobic regulating tank, and decomposing organic polymer pollutants in sewage flowing in through a grid into organic low-molecular pollutants by utilizing the degradation capacity of facultativeanaerobic microorganisms and anaerobic microorganisms so as to obtain first sewage containing the organic low-molecular pollutants; decomposing the first sewage containing organic low-molecular pollutants into carbon dioxide and water by utilizing the decomposition capacity of aerobic microorganisms through a biological membrane reaction tank to obtain treated second sewage; intercepting the treated second sewage through a biological membrane separation tank by utilizing an improved polyvinylidene fluoride (PVDF) membrane and a self-generated dynamic membrane to obtain treated third sewage, enabling intercepted sludge to flow back to the anaerobic regulation tank, and removing nitrogen by utilizing a denitrification effect.

The invention relates to a method and a device of nitrifying domestic wastewater by embedded nitrobacteria, and belongs to the field of sewage treatment. The method comprises the following steps: separating and enriching separated nitrobacteria and embedding by a WPU material; placing the embedded nitrobacteria in a special nitrifying reactor device which comprises a water bath constant temperature system, aerating equipment, stirring equipment, a nitration reaction tank and the like. Due to the embedded nitrobacteria, the hydraulic retention time and the biological retention time are separated, and infinitely long biological retention time is realized, so that the biomass of nitrobacteria in the reactor is greatly increased, and the wastewater treatment efficiency is improved. Meanwhile, the reactor has the advantages of high impact load, easiness in recovery start and no mud discharged, and the dosage of the embedded nitrobacteria carriers can be agilely adjusted according to the water quality of the source of water.

The invention relates to a vertical multistage AO ecological sewage treatment system. The vertical multistage AO ecological sewage treatment system is characterized in that sewage is orderly treated by a coarse screen, a lifting pump house, a fine screen, a grit basin, a vertical multistage AO ecological tank, a cloth filter tank and a UV disinfection canal and then is discharged by a standard discharge opening, and sludge produced by the fine screen, the grit basin, the vertical multistage AO ecological tank and the standard discharge opening is transferred into a sludge storage tank, then is treated in a dehydration machine room and can be carted. The treatment system has less sludge amount (of sludge-drainage time of 20-25 years), does not produce odor, realizes thorough removal of organic matters, provides a carbon source produced in sludge stabilization for denitrification demands, reduces an external carbon source, produces water satisfying first-grade standard A or B, can be used for construction of an ecological landscape park, has the advantages of less construction investment and short construction period, can utilize waste and old or existing pits, ponds, trenches and slopes, and has a construction period of 4-6 months.

The invention discloses an integrated sewage treatment device based on a tidal aerated biological filter. The integrated sewage treatment device comprises a sedimentation tank, the aerated biologicalfilter, an anaerobic filter and a respiratory filter which are sequentially connected by pipes. A water inlet pipe is arranged at the upper part of the sedimentation tank, a produced water pipe is arranged at the bottom of the respiratory filter, a main filter layer and a drainage layer are arranged in the aerated biological filter sequentially from top to bottom, the main filter layer is filled with a primary filter material, the drainage layer is filled with a secondary filter material, and the particle diameter of the secondary filter material is greater than that of the primary filter material. The bottom of the drainage layer is provided with a water outlet, the water outlet is connected with a tidal drainage device, and the tidal drainage device is connected with the anaerobic filter. The integrated sewage treatment device has the advantages that the sedimentation tank is arranged at the front end of the water inlet pipe to remove most of sediments so as to ensure the water inletcondition of the filter; and the tidal aerated biological filter, the anaerobic filter and the respiratory filter constitute an aerobic-anaerobic-aerobic process combination, which has a good effecton the removal of ammonia nitrogen and other pollutants. The entire device is small in size, high in load, and low in operating energy consumption.

The invention belongs to the technical field of sewage treatment, and particularly relates to a modular sewage treatment and reclamation method and device. The device is in an integrated box structure and comprises a box body, wherein the box body is sequentially provided with a pre-precipitation chamber, a pre-dephosphorization coagulative precipitation chamber, a denitrification biological chamber, a combined nitration reaction chamber and a disinfection chamber from left to right; and the side of the box body is provided with a sludge treatment chamber. The device can perform sewage treatment and effluent water reclamation to achieve the sewage discharge indexes. The sludge generated by sewage treatment is concentrated, dehydrated and transported outside. The method and device are mainly used for integrated treatment of minitype sewage.

The invention discloses a coking wastewater treatment composite process, which comprises an anaerobic pool, anoxic pool, an aerobic pool, a membrane pool, and a backwashing pool; specifically, it is composed of the following steps: the coking wastewater enters the anaerobic pool, and in the anaerobic pool The phosphorus accumulating bacteria release phosphorus and absorb easily degradable organic matter such as low-level fatty acids, and then enter the anoxic pool for biological denitrification through overflow, convert it into nitrogen and release it into the air, and then enter the aerobic pool for biological nitrification It is converted into nitrate, and then enters the membrane tank to suck the water out to the backwash tank and backwash the hollow fiber membrane module regularly through the metering pump. The invention adopts a composite process to treat coking wastewater, and through the organic combination of biological treatment and membrane treatment, the nitrification capacity of the treatment system is improved, and a good treatment effect is achieved for coking wastewater with a COD concentration of 2500ppm and an ammonia nitrogen concentration of 300ppm.

The invention relates to an efficient nitrogen recovery device and process for sewage. The device comprises an ammonia nitrogen ion exchange unit connected into a mainstream sewage treatment pipe, anda regenerated liquid storage tank connected with the ammonia nitrogen ion exchange unit through a regenerated liquid circulating pipe to form circulation, The regenerated liquid storage tank is alsosequentially connected with a magnesium removal sedimentation tank, a calcium removal sedimentation tank, a biological nitrification reactor, an electrodialysis module and an evaporation concentrationmodule, and the biological nitrification reactor is also connected with the regenerated liquid storage tank in a returning manner. Compared with the prior art, the process has the advantages that theregenerated liquid with high NH4 < + >- N concentration is subjected to nitrogen recovery, so that synchronous nitrogen emission reduction and nitrogen recovery of mainstream ammonia nitrogen ion exchange-regeneration enrichment-biological nitrification-electrodialysis concentration-evaporation crystallization are realized.

The invention relates to a detachable variable-water-level vertical-current artificial wetland which comprises a high water level tank (10), a wetland tank (20), an air pipe (30), a water collection pipe (40) and a base (50), wherein the bottom of the high water level tank (10) is connected with a water inlet pipe (101); the water inlet pipe (101) is connected with a surface water distribution pipeline of the wetland tank (20); the tank wall is spliced by PVC (polyvinyl chloride) boards; the air pipe (30) is arranged at the middle part of the wetland tank (20); the top end of the air pipe (30) is communicated with air; the water collection pipe (40) is positioned on the bottom of the wetland tank (20); one end of the water collection pipe (40) is connected with a water outlet pipe (402); and the top end of the water outlet pipe (402) is connected with a rotary bent pipe (403). By adopting the detachable mode for splicing and construction, the artificial wetland has the advantages of simple structure and favorable treatment effect, is convenient to install, can reutilize the land, and effectively achieves the goals of material reutilization and waste reduction.

The invention relates to the technology of the fecal wastewater treatment. The fece is characterized by high suspended matter concentration, higher COD value, foul smell, many pathogenic bacteria and the like and belongs to the high concentration organic wastewater. Most domestic fecal treatment devices adopt simple physicochemical treatment modes such as flocculation and separation and the fecal wastewater is separated simply to be directly discharged, thus the environment and the life of the residents are influenced. The technical scheme of the invention for solving the technical problem of fecal wastewater treatment is as follows: (1) high solution bacteria (H.S.B.) efficient microbes are used to increase the pertinence of microbes on the pollutants of the wastewater; and (2) the anaerobic baffled reactor-oxic baffled reactor (ABR-OBR) technology which has pertinence on the fecal wastewater treatment is adopted to ensure that the treated fecal wastewater is completely harmless. The invention has the following beneficial effects: the pertinence of the biochemical treatment system on the fecal wastewater can be realized, the pollutants of the wastewater can be removed fundamentally by the biochemical treatment system, and after the fecal wastewater passes through the biochemical treatment system to perform harmless treatment, the wastewater can meet the emission standard.

The integrated intermediate water reusing apparatus includes biochemical reaction tank, horizontal suspended filtering membrane system and automatically controlling single-board computer system. The present invention features the biochemical reaction tank comprising biological selection region, anoxia region and aeration region; the horizontal suspended filtering membrane system set in the aeration region and comprising horizontal suspended filtering membrane assembly, membrane assembly suspending ball, membrane assembly water collecting pipeline frame, frame slide rail and pressure-resisting plastic hose; and the automatically controlling single-board computer system comprising single-board computer controller, input channel, output channel and control panel. The present invention has the advantages of compact structure, low cost, high effluent water quality, etc.

The invention provides a double-layer filter material biological aerated filter, which is mainly composed of a water inflow distribution device, a support layer, a double filter material layer, a process aerating device, a backwash aerating device, a central drainage device, and a water outlet; and is characterized in that: a piece of equipment is filled with filter materials of coarse and fine different diameters to form a double filter material layer, which is used for realizing simultaneous decarburization and nitrification functions, the central drainage device is arranged at a place of junction of the upper and lower filter material layer, the branch pipe of a central drainage pipe is opened with small holes for discharging backwash sludge, and two lower layers can make use of different backwash modes. The double-layer filter material biological aerated filter has the advantages that: (1) decarburization and nitrification functions can be simultaneously achieved in a BAF, the filter has a high removal rate for organic matters and ammonia nitrogen, the backwash water consumption is low; and (2) the gas-water ratio is low and only of 2:1-6:1, the operating cost is low, the floor space is small, the system is simple, and the investment is small.