71results about How to "Reduce dissolved oxygen concentration" patented technology

The invention relates to a rapid start method for an integrated autotrophic denitrification system and belongs to the technical field of treatment of sewage with high ammonia nitrogen. An SBR (Sequencing Batch Reactor) is inoculated with short-cut nitrification sludge and anammox sludge according to the mass ratio of (1: 3) to (1: 1), and the concentration of mixed sludge is 3,000mg / L to 4,000mg / L. The dissolved oxygen is controlled to be 0.3mg / L to 0.5mg / L by adopting an intermittent aeration operating mode, and the accumulation amount of nitrite nitrogen at the end of aeration is 20mg / L to 30mg / L; in each cycle, three aeration and hypoxic stages are set at intervals; each cycle has six stages, i.e., water inlet, aeration / hypoxic reaction, stirred degassing, precipitating, water outlet and standing. In a starting process, the concentration of dissolved oxygen is controlled unchanged, the balance of supply and consumption of nitrite nitrogen is maintained through a method of stagewise prolonging aeration stage time and shortening hypoxic stage time, and the rapid increase of denitrification load is achieved. When the initial ammonia nitrogen concentration in the reactor reaches 300mg / L, the balance of supply and consumption of nitrite nitrogen is maintained by means of shortening the hypoxic stage time. According to the method, the starting speed is high, the total-nitrogen removal load is high, and the operation is stable.

The invention provides a higher rust preventive effect than alkaline water prepared by conventional electrolysis, and washing water compatible with safety and washing quality. In the method of preparing washing water, a process by which sulfate ions in raw water are made to be <=0.2 mmol / dm3 and / or chloride ions <=0.5 mmol / dm3, calcium ions <=1.0 mmol / dm3, and Mg ions <=1.0 mmol / dm3, is performed and subsequently a process by which sodium carbonate concentration in raw water is made to be 0.1-10.0 mmol / dm3, is performed, and then this water is electrolyzed to obtain washing water having >=8.0 and <=13.0 pH and / or 100 mV to 1,000 mV oxidation reduction potential.

The invention discloses a sludge dephosphorizing and denitrifying biological disposing method, which comprises the following parts: adsorbing pool, sedimenting pool, regenerating pool, selecting pool, dephosphorizing pool, nitrated pool, denitrifying pool and hydrolytic acidifying pool, wherein the effluent enters in the adsorbing pool firstly to blend with reflux sludge in the selecting pool; the blending liquid is drained from adsorbing pool to sedimenting pool to separate mud from water; the supernatant enters into nitrated pool to denitrify in the denitrifying pool to drain; the sediment part of sludge is proceeded anaerobic hydrolysis in the hydrolytic acidifying pool; the supernatant is inputted into dephosphorizing pool to proceed chemical dephosphorizing; the other part of sediment pool refluxes sludge into selecting pool under anaerobic environment; the composite liquid from selecting pool is input in the regenerating pool; the other part supernatant from dephosphorizing pool is input in the denitrifying pool to accelerate denitrifying action.

3 The present invention relates to an improved UCT process and its equipment, belonging to the field of sewage treatment technology. It is characterized by that the aerobic reactor is divided into two stages, between two aerobic reactors a deoxygenation reactor is set, every aerobic reactor is equipped with an independent gas flow controller. In first aerobic tank it can control low dissolved oxygen to implement short-range nitrification and make the ammoniac nitrogen be oxidated into nitrite, in second aerobic tank it applies high dissolved oxygen to ensure that the residual nitrite can be oxidated into nitrate. Said equipment also includes a second anaerobic reactor. Said invention also provides the concrete function and action of said deoxygenation reactor and said second anaerobic reactor.

The invention provides a method used for detecting the oxygen demand for quick biochemistry by cultivating microorganism in situ. The in-situ microorganism culture is defined as that the pipeline carrying current in a flowing system is taken as a carrier, the flowing of water sample containing organic matters and microorganism is taken as precondition, the microorganism in the water sample is adsorbed onto the surface of the internal wall of the pipeline. The pipeline carrying current in the flowing analysis system is taken as the carrier to adsorb on the microorganism on the spot in the environment water; on the one hand, the adsorbed microorganism has idiosyncratic degradation capability on the organic matter in the water and the obtained result has higher pertinence; on the other hand, the adsorption state of the microorganism on the internal wall of the pipeline is most approaching to the natural surviving state and the activity of the microorganism is kept to the most extent. The service life of the existing biological film of a BOD sensor is not more than 3 months and the maintenance is troublesome. in the method, the culture of microorganism in laboratory is saved, and a plurality of problems such as preparation, storage, activation and the like of the microorganism film; furthermore, the adsorbed microorganism can always keep the physiological activity state during the continuous analysis and testing process, therefore, the method has extremely wide application prospect.

The invention provides a device and a method for starting micro expansion of sludge in the anoxic / aerobic biological denitrification process, and belongs to the technical field of sewage treatment. The method is characterized in that in an anoxic / aerobic biological denitrification system, the micro expansion of the sludge is started, the micro expansion of the sludge is controlled within a certain limit, treatment effects are optimized and energy consumption is saved. The proposal of starting the micro expansion of the sludge in the anoxic / aerobic biological denitrification system comprises: 1, triggering the micro expansion of the sludge only by low dissolved oxygen, and including two starting modes for gradually lowering the dissolved oxygen concentration and suddenly lowering the dissolved oxygen concentration; and 2, starting the micro expansion of the sludge in the mode of the low dissolved oxygen combined with the low load. The device and the method are mainly used to optimize operational effects of the anoxic / aerobic biological denitrification sewage treatment system, namely under the conditions of lowering the dissolved oxygen concentration, saving aeration rate and saving energy, the pollutant-removing rate is ensured to meet the standards, and simultaneously the concentration of effluent suspended matters is greatly reduced.

There are provided a method and apparatus for manufacturing hydrogen-containing drinking water that can fill a packaging container with hydrogen-containing water while suppressing the change of the dissolved hydrogen concentration of the hydrogen-containing water to a low level.A method of continuously manufacturing hydrogen-containing drinking water includes (A) a deaeration step, (B) a hydrogen dissolving step, (C) a filling step, and (D) a sealing step. Pressure is applied to water flow channels corresponding to hydrogen-containing water, which is to be injected to a packaging container in the filling step, from purified water that is to be supplied to the deaeration step. The filling step includes: a preparation stage of supplying hydrogen-containing water, to which pressure is applied, into a filling device; a deaeration stage of removing gas, which is present in the packaging container, after connecting the packaging container to the filling device; an injection stage of directly injecting the hydrogen-containing water, to which pressure is applied, into the packaging container; and a discharge stage of discharging hydrogen-containing water, which remains in the filling device, into the packaging container by introducing pressurized air into the filling device. The method further includes a step of immediately proceeding to the sealing step (D) when the injection port and the filling port are disconnected from each other.

The invention discloses a low-oxygen aeration AOA-SBBR short-cut nitrification anaerobic ammonia oxidation coupling denitrifying phosphorus removal integrated urban sewage treatment method, and belongs to the technical field of biological sewage treatment. Sewage enters a short-cut nitrification anaerobic ammonia oxidation coupled denitrifying phosphorus removal integrated SBBR reactor through a water inlet pump, firstly, anaerobic stirring is carried out, denitrifying phosphorus-accumulating bacteria and denitrifying glycogen-accumulating bacteria store easily degradable organic matters in water as an internal carbon source, then NH4 +-N is oxidized into NO2 --N through ammonia oxidizing bacteria in an aerobic aeration stage, anaerobic ammonium oxidation bacteria are utilized to convert generated NO2 --N and NH4 +-N into N2 for denitrification under the condition of a micro-anoxic environment in a filler; and finally, denitrifying phosphorus-accumulating bacteria and denitrifying glycogen-accumulating bacteria are utilized to remove residual NO2 --N, NO3 --N and phosphorus in sewage through endogenous denitrification in the anoxic stage. According to the method, short-cut nitrification, anaerobic ammonia oxidation and denitrifying phosphorus removal are coupled in one SBBR reactor, so that the urban sewage can be deeply treated on the basis of saving energy and fully utilizing a carbon source.

The invention discloses an internal pressure creep test device for simulating the service environment of boiler tubes in a coal-fired power plant, and a using method of the internal pressure creep test device. The device comprises a gas pressurization system, a steam supply system, a flue gas supply system, a test heating system and a control cabinet. Compared with the prior art, the device and the method can realize an internal pressure creep test of the boiler tubes of the coal-fired power plant under various environment coupling actions such as high temperature, high pressure, outer wall corrosive flue gas and inner wall water vapor, so that the test environment is closer to the actual service environment of the boiler tubes of a coal-fired power stations, and the test results are moreaccurate and reliable. Furthermore, the temperature (0-1000 DEG C), pressure (0-200MPa), flue gas ratio and vapor dissolved oxygen content of the device can be adjusted, so that the device can meet the requirements of different test conditions; finally, according to the device, a plurality of sets of test heating units can be connected in parallel at the same time, so that a plurality of samples can be subjected to the internal pressure creep test at the same time.

The invention discloses an offline cleaning method for removing pollutant of an SPG (shirasu porous glass) membrane used in biological wastewater treatment. The offline cleaning method includes steps of ultrasonically treating the polluted SPG membrane to remove a microbial polluted layer at first after the SPG membrane is used for treating domestic sewage; air-drying; performing heat treatment to remove organic pollutants; and performing acidic treatment to remove inorganic pollutants. After the pollutants of the SPG membranes are removed by the offline cleaning method, microbubble generating ability, oxygen mass transfer efficiency and dissolved oxygen concentration are comprehensively recovered, so that a smooth wastewater treatment process can be guaranteed.

The invention discloses a method for treating landfill leachate. The method comprises the following steps of: feeding the landfill leachate into an adjustment tank first, sequentially feeding the landfill leachate into a biological contact oxidation pond, a low-oxygen aeration tank, a nitrosation reaction tank, an anaerobic ammonium oxidation reaction tank and a microwave treater, finally feeding the landfill leachate into a separator, performing precipitation separation to separate active carbon obtained after microwave treatment from the outlet water of the landfill leachate, and then discharging the outlet water which meets the standard. The technology for treating the landfill leachate saves energy and is high in efficiency and low in consumption; and by the method, pollutants such as organic pollutants, nitrogen (N) and phosphorus (P) can be effectively removed, and the environmentally acceptable treatment and discharge of the landfill leachate can be realized finally.

The invention discloses a preparation method of a permeable reaction wall filled with microorganisms fixed by biological carbon, and belongs to the field of groundwater pollution remediation. The permeable reaction wall provided by the invention comprises a four-layer structure comprising a coal cinder water inlet layer, an iron powder mixed filler layer, a fixed microorganism layer and a coal cinder water outlet layer, wherein the coal cinder water inlet layer, the coal cinder water outlet layer and the iron powder mixed filler layer can be used to achieve a purpose of reducing dissolved oxygen in water; biological carbon is used for preparing fixing particles of degrading bacteria in the fixed microorganism layer; the biological carbon is mixed with quartz sand, and then the obtained mixture fills the permeable reaction wall; and the coal cinder water outlet layer is added downstream. Pollutants in underground water can be degraded by applying fixed anaerobic microorganisms, so thatstrain loss is reduced, and sewage treatment efficiency can be improved. In addition, the permeable reaction wall is low in cost, low in microorganism loss, high in activity and high in impact resistance, and can be applied to anaerobic microorganisms.

The present invention discloses a cream manufacturing process, and relates to the field of food production. The cream is composed of the following components in parts by weight: light cream 70-80 parts, vegetable oil 10-20 parts, emulsifiers 1-2 parts, preservative 0.2-0.4 part, thickening agent 0.5-1 part, stabilizing agent 0.2-0.3 part, essence 0.05-0.1 part, table salt 0.5-1 part, honey 0.5-1.2 part, amygdalus persica powder 5-10 parts, vitamin 0.6-1 part and nutrition enhancers 0.8-1.2. The manufacturing process includes raw material preparing, raw material mixing, vacuum degassing and homogenizing, ultra-high temperature sterilizing, cooling, filling and other steps, the preparation process is simple, increases cream value by adding nutrient substances into the raw materials, improves cream taste by adding the amygdalus persica powder, and selects hydrogenated palm-kernel oil as the vegetable oil, potassium sorbate as the preservative, microcrystalline cellulose as the thickening agent and modified starch as the stabilizing agent. The cream is reasonable in proportion, obvious in effect, simple in preparation process and easy to master.

The invention relates to an ecological purification system for strengthening the nitrate nitrogen removal in a low C / N river and lake water body. The system comprises a water volume regulating pond, asewage intercepting apparatus, a carbon releasing pond, a subsurface flow artificial wetland and a submerged plant pond which sequentially communicate along the water flow direction, and a carbon releasing apparatus that can be removed is arranged inside the carbon releasing pond. The carbon releasing pond is arranged in front of the subsurface flow artificial wetland, the agricultural and forestry waste is fully utilized to release a carbon source, the carbon source required for the heterotrophic denitrification of the subsequent artificial wetland system can be supplemented, and the removalefficiency of the nitrate nitrogen by the wetland system is improved. When the carbon source release rate is low or the release is stopped, a carbon releasing bed can be replaced at any time, the optimal design can be carried out according to the feeding water quality, and the operation is more flexible. The submerged plant pond is arranged behind the subsurface flow artificial wetland, the residual carbon source and nutrient concentration can be further reduced, the secondary pollution problem caused by the excessive release of the carbon source is avoided, and the outlet water quality is ensured to reach the standard.

Nitrogen is dissolved in pure water and hydrochloric acid is mixed in this nitrogen-dissolved pure water, thereby creating as a rinsing liquid a mixture liquid whose pH is lower than that of pure water, and thus created rinsing liquid is supplied at nozzles 6 and 25 toward a substrate W. In the case of such a rinsing liquid, the dissolved oxygen concentration in the rinsing liquid is lowered, and it is possible to suppress a rapid increase of the dissolved oxygen concentration in the rinsing liquid as it is immediately after injected at the nozzles 6 and 25. Also suppressed is elution of Si from the surfaces of the substrate.

The invention discloses a method for treating sewage of circulating cooling water in a renewable water resource, and belongs to the field of wastewater treatment. The method comprises the steps that the sewage of the circulating cooling water enters an adjusting tank to adjust the water quality and the water flow, and then the sewage passes through a filter, an ozone oxidation tank, a buffering tank, an oxygen elimination tank, an anaerobic tank, an aerobiotic tank, a primary sedimentation tank, a phosphorous-removal mixing tank and a fiber filter in sequence for treatment, wherein the oxygenelimination tank is filled with bio-cord filler, the anaerobic tank and the aerobiotic tank are filled with filler, the anaerobic tank supplements external carbon source, nitrification liquid at the tail end of the aerobiotic tank flows back into the oxygen elimination tank and the anaerobic tank,, and slurry in the primary sedimentation tank flows back into the oxygen elimination tank. By means of the method, ammonia nitrogen, total nitrogen, total phosphorus, organic matter difficult to degrade and other pollutants in the renewable water resource can be removed, and the outlet water obtainedafter treatment can meet the requirements that the CODcr is equal to or lower than 30 mg / L, the total nitrogen is equal to or lower than 15 mg / L, the ammonia nitrogen is equal to or lower than 1.5 mg / L and the total phosphorus is equal to or lower than 0.3 mg / L.

The invention discloses a device for delaying MBR (membrane bioreactor) membrane contamination and blocking. The device comprises an MBR membrane assembly, an MBR membrane frame body, a moving frame,a driving device and two parallel support rails, wherein the moving frame and the two parallel support rails are glidingly matched; the MBR membrane assembly is placed in the MBR membrane frame body;the MBR membrane frame body is fixedly connected with the lower side of the moving frame; the driving device is fixedly arranged on a connecting beam arranged between the two support rails and can drive the moving frame to do reciprocating movement along the support rails. The invention also provides a method for delaying the MBR membrane contamination and blocking. The MBR membrane assembly vibrates in an MBR by the driving device; vibration water flow is generated; the MBR membrane assembly is continuously flushed; meanwhile, membrane wires mutually collide and rub, so that the contaminationand blocking of the MBR membrane is delayed. The device and method for delaying the MBR membrane ontamination and blocking have the advantages that the cost is low; the energy consumption is low; theeffect of delaying the membrane contamination and blocking is good; the MBR membrane contamination and blocking can be delayed on the premise of ensuring the low-dissolved oxygen concentration environment in the MBR.

The invention provides a sewage aeration monitoring system based on a wireless sensor network. The sewage aeration monitoring system comprises a water quality sensing monitoring device, a base station, a central monitoring terminal and an automatic governor valve, wherein the water quality sensing monitoring device and the base station are arranged on a monitoring site; the base station is connected with a central monitoring terminal; the automatic governor valve is used for adjusting the aeration amount; the water quality sensing monitoring device comprises a plurality of sensor nodes; the sensor nodes are used for monitoring the water quality of the monitoring site, and transmitting corresponding water quality parameter data to the base station; and the base station is used for transmitting the water quality parameter data to the central monitoring terminal. Through adoption of the sewage aeration monitoring system, monitoring of sewage aeration is realized by a wireless sensor network technology.

The invention discloses a weak corrosivity removing method for an aluminum and copper compound mandrel for preparing a uranium-bearing hohlraum and relates to a demolding method of the uranium-bearing hohlraum. The method disclosed by the invention aims to solve the problem that in the prior art, the uranium-bearing hohlraum of the aluminum and copper compound mandrel cannot be demolded. The weak corrosivity removing method comprises the following steps: I, performing loading to obtain a sample stand containing a uranium-bearing hohlraum sample; II, performing negative pressure demolding to remove an aluminum mold core to obtain the sample stand loading a sample without the aluminum mold core; III, performing cleaning; IV, performing weak corrosivity removal of a copper coating to obtain the sample stand loading a sample without the copper coating; and V, immersing in a complexing agent, cleaning, and demolding the uranium-bearing hohlraum of the aluminum and copper compound mandrel. The method disclosed by the invention has the advantage that the molding success rate reaches 100%. The method disclosed by the invention is primarily applied to demolding the uranium-bearing hohlraum.

The present invention discloses a treatment system for coal chemical industry wastewater, which comprises: a pre-denitrification zone, wherein raw water enters the pre-denitrification zone to carry out a denitrification reaction; a nitrification and decarburization zone, wherein mixed liquid from the pre-denitrification zone enters the nitrification and decarburization zone to be subjected to a nitrification reaction; a first facultative zone, wherein the mixed liquid from the nitrification and decarburization zone enters the first facultative zone to be subjected to synchronous nitrificationand denitrification, and one part of the mixed liquid in the first facultative zone flows back to the inlet of the front denitrification zone through a reflux pump; residual mixed liquid from the first facultative zone enters the rear denitrification zone to be subjected to denitrification reaction; the mixed liquid from the rear denitrification zone enters the second facultative zone to be subjected to synchronous nitrification and denitrification; mixed liquid from the second facultative zone enters the secondary sedimentation tank to be subjected to mud-water separation, and a part of sludge at the bottom flows back to an inlet of the front denitrification zone through a sludge reflux pump. According to the treatment system disclosed by the invention, the efficiency of pre-denitrification and post-denitrification can be improved, and the consumed carbon source is reduced.

The invention discloses a sequence fed-batch reactor and biological aerated filter (SFBR-BAF) biological nitrogen and phosphorus removal technology. The SFBR-BAF biological nitrogen and phosphorus removal technology comprises carbon removal, nitrogen removal, and nitrogen and phosphorus removal, and concretely comprises that in a reaction period, sewage is continuously added into an activated sludge reaction tank, the environment of a front SFBR reaction tank is orderly set into an aerobic state and an anaerobic state, the supernatant is discharged by one step after solid-liquid separation in a static settlement stage, and the discharged supernatant is fed into a back improved BAF device, then is treated orderly by an anaerobic section and an aerobic section of the BAF device and then is discharged. The SFBR-BAF biological nitrogen and phosphorus removal technology realizes a good microbe growth environment, solves the problem that high-concentration salts in waste water damage microbes or inhibit microbe growth, solves the problem of mutual inhibition and carbon source contending of microbe mixed culture, solves the problem of BAF biological filter material blocking caused by high-concentration SS, improves a wastewater biotransformation rate, improves total nitrogen and phosphorus removal effects, improves an oxygen utilization rate, and reduces energy consumption and a production cost.

The invention relates to the technical field of sewage treatment, and particularly discloses a rural sewage treatment process. According to the rural sewage treatment process, rural sewage is introduced into an SBR reaction tank for sewage treatment, the time sequence of the SBR reaction tank is set as water feeding, intermittent aeration, precipitation and water decanting, the intermittent aeration comprises a carbon removal stage and a denitrification stage, the time ratio of on-off of air supply of a fan in the carbon removal stage is (1-2): 1, and the on-off frequency is 1-3; in the denitrification stage, the time ratio of on-off of air supply of the fan is 1: 10-20, and the on-off frequency is 1-9 times. The outlet water of the rural sewage treatment process provided by the invention not only meets the requirement of the water quality of the outlet water of a pollution discharge unit required by the national first-grade A standard, the removal rate of total nitrogen reaches 90% or above, but also the water and electricity consumption per ton is greatly reduced, and the economic cost is reduced.

The invention belongs to the field of sewage treatment of an artificial rapid infiltration system, and particularly relates to an intermittent aeration aerobic / anoxic (O / A) type artificial rapid infiltration device which comprises an aerobic zone and an anoxic zone which are adjacently arranged left and right and are isolated from each other, and the aerobic zone comprises a water inlet mixing zone and an aerobic reaction zone from bottom to top; according to the aerobic reaction zone, under intermittent aeration operation, organic matter is converted and degraded under the action of aerobic heterotrophic microorganisms, and under the action of ammoniation and nitrification, a large number of nitrogen elements are converted into nitrate radicals. The anoxic reaction zone is used for denitrification reaction denitrification. By improving the type and grading of the traditional artificial rapid infiltration filler, the structure of the device and the like, the aerobic section and the anoxic section are separated, and intermittent micro-aeration is carried out in the aerobic section so that integrated treatment of organic matter removal, denitrification and dephosphorization is realized, and an energy-saving and efficient treatment device is provided for distributed sewage treatment.

The invention provides an aqueous electrolyte with low dissolved oxygen, a preparation method thereof and an aqueous ion battery containing the electrolyte. The aqueous electrolyte contains a deoxidizing synergist with chemical reducibility, and the deoxidizing synergist comprises one or more of an electrolyte salt, a hydroxylamine compound and a phenol compound. The deoxidizing synergist can be subjected to an oxidation-reduction reaction with free oxygen in the electrolyte, so that the effect of reducing the content of the free oxygen in the electrolyte is achieved, the pH value of the electrolyte can be adjusted, the hydrogen evolution side reaction is inhibited, and an electrode is protected. The aqueous electrolyte can be applied to aqueous lithium ion batteries, aqueous sodium ion batteries, aqueous zinc ion batteries and the like.

The invention relates to a plug flow reaction device for stable operation of a nitrosation-anaerobic ammoxidation technology, and a method thereof. The purpose of the invention is to solve the technical problem of easiness in accumulating nitrates, caused by difficult stable operation of the current mainstream nitrosation-anaerobic ammoxidation technology in the prior art. The device comprises a water inlet tube, a water inlet tank, a water inlet hole, a fixed packing tank, a dissolved oxygen temperature online monitoring probe, a water bath heater, a gallery separator plate, a water outlet weir, a water outlet tank, a water outlet tube and an aeration head. The method comprises the following steps: inoculating with sludge; and 2, starting the device. Intermittent aeration, total aerationamount control, low dissolved oxygen concentration, residual ammonia inhibition and nitrite-oxidizing bacterium generation inhibiting ways are combined to realize the stable operation of the nitrosation-anaerobic ammoxidation technology, inhibit the activity of the nitrite-oxidizing bacteria and avoid the unstable running of a reactor, caused by the accumulation of nitrates.

The invention discloses a deep nitrogen-removing technology based on a SBR, and belongs to the technical field of environment engineering. The SBR equipment is adopted, sewage in the SBR runs in an anaerobic, low-oxygen and oxygen-deficit mode, PHA is stored for anaerobic-period microorganisms, and the favorable condition is provided for nitrite denitrifying phosphorus accumulating in the low oxygen period. Under the condition of the usual domestic-sewage carbon nitrogen ratio, an internal carbon source existing in the PHA mode is still surplus in the aerobiotic last phase, and can provide a carbon source for denitrification nitrogen removing of the later oxygen-deficit period. By accurately controlling low-oxygen-period time and post-oxygen-deficit-period time, accurate controlling over the ammoxidation process and the denitrification process is achieved, and therefore deep nitrogen removing of the sewage is achieved. When the device runs for a certain period, anaerobic phase time isprolonged, or an external carbon source is added into a reactor in the anaerobic initial stage for intensifying phosphorus release, so that the activity of phosphorus-accumulating bacteria is enhanced, and the phosphorus removing effect is improved.

The invention discloses a fixed carrier-supported biofilm and activated sludge coupled sequencing sewage treatment device and process. The fixed carrier-supported biofilm and activated sludge coupledsequencing sewage treatment device comprises a reaction unit, a water feeding unit and a chemical feeding unit, wherein the water feeding unit and the chemical feeding unit are connected with the reaction unit through pipes; the side surface of the reaction unit is provided with, sequentially from top to bottom, an overflow port, a water drainage port and a sludge drainage port, and the side surface of the reaction unit is also provided with a backflow device for returning sludge-water mixtures at the bottom of the reaction unit to the top of the reaction unit; the inside of the reaction device is provided with, sequentially from top to bottom, carrier filler, a stirring unit and an aeration unit, wherein the carrier filler is fixed in an area above the water drainage port and under the overflow port; the aeration unit is fixed onto the bottom surface of the reaction unit. The fixed carrier-supported biofilm and activated sludge coupled sequencing sewage treatment device and process can meet the special emission limit of effluent water quality, which is specified in Discharge Standard of Pollutants for Municipal Sewage Treatment Plant (Exposure Draft), and can achieve an effluent ammonia nitrogen concentration less than 0.5 mg / L and a total nitrogen concentration less than 10 mg / L.