547 results about "Anammox" patented technology

The invention discloses a nitrosation-anaerobic ammonoxidation single-stage biological denitrification method, the technology utilizes nitrosation flora with intensified active carbon as core after adding powdery active carbon and anaerobic ammonoxidation flora to generate composite granule sludge, and couples two reactions of nitrosation reaction and anaerobic ammonoxidation reaction, realizes biological denitrification reaction for transforming ammonia nitrogen into nitrogen in macrography. The invention is operated in one reactor at normal temperature without need of heating preprocessing waste water, saves energy, needs small accommodation area and reduces free nitrous cumulant of free nitrite to resist ammonia nitrogen with higher concentration. The invention adds powdery active carbon to form intensified granule sludge and self-cultures suspended sludge, thereby simplifying startup and running of the technology.

The invention discloses a method for preparing a bioactive filler through immobilization of an anaerobic ammonia oxidizing bacterium, and belongs to the field of water treatment. The active filler is prepared by the following steps of: grinding active carbon, soaking in an anaerobic ammonia oxidizing bacterium liquid culture medium, and preparing an embedding solution from polyvinyl alcohol, calcium carbonate and condensed anaerobic ammonia oxidizing bacterium liquor in proportion; mixing and uniformly stirring the prepared embedding solution with soaked granular active carbon, and implementing immobilization through boric acid to finish cross-linking immobilization, thereby obtaining the active filler. The bioactive filler, after being cultured for 2 weeks, can recover anaerobic ammonia oxidizing activity. The bioactive filler disclosed by the invention is good in settlement performance and high in mechanical strength, and can achieve a micro-expansive state in an upflow biofilter.

A method for co-immobilizing anammox bacteria-short-range nitrifying bacteria and its application belong to the technical field of sewage treatment, using polyvinyl alcohol, sodium alginate and activated carbon as embedding agents to anaerobic ammonium oxidizing bacteria and short-range nitrifying bacteria Layered embedding and fixation, firstly mix equal volumes of anammox sludge and embedding agent uniformly, get anaerobic ammonium oxidation gel pellets after fixation, and then put them into the mixed solution of short-range nitrifying bacteria and embedding agent In the process, anammox-short-range nitrifying bacteria gel pellets were obtained after fixation, and were directly added to the autotrophic denitrification reactor after activation. The present invention uses immobilized microbial technology to co-immobilize anammox bacteria and short-range nitrification bacteria on the same carrier, and stably enrich high-activity anammox and short-range nitrification sludge, so that the biological efficacy of the two bacteria can be coordinated. , to realize the coordinated operation of short-range nitrification reaction and anammox reaction.

The invention discloses a cultivation method of anammox granular sludge, and belongs to the field of water treatment. The cultivation method solves the technical problems that the existing high-efficiency anammox granular sludge is difficult to cultivate, and the cultivation time is long. The method comprises the following steps that 1, aerobic granular sludge and anammox seed sludge are simultaneously inoculated into an EGSB (expanded granular sludge bed) reactor; 2, nitrogenous simulated waste water is supplied to the EGSB reactor, the hydraulic retention time is kept for 12h, and concentrations of ammonia nitrogen and nitrite nitrogen in intake water are gradually increased until successful start when the synchronous removal rate of ammonia nitrogen and nitrite nitrogen is above 80%; and 3, intake water concentrations of ammonia nitrogen and nitrite nitrogen are kept stable, the hydraulic retention time is gradually shortened up to 2.6h when the synchronous removal rate of ammonia nitrogen and nitrite nitrogen is above 80%, and then the cultivation of the anammox granular sludge is completed. With the method, the reactor can be started successfully within about 20 days, and the high-efficiency anammox granular sludge can be obtained within about 89 days.

The invention relates to a high-efficiency and low-consumption recycling and treating method for urban sewage, belonging to the technical field of treating and reusing the urban sewage, which aims to solve the problem of poor effects of dephosphorization and denitrogenation in prior art. The recycling and treating method in the invention is characterized in that: first, biological phosphorus removal is conducted for the pretreated sewage, meanwhile, the organic substance is also removed; then, the biological autotrophic denitrogenation is carried out, thus completing the recycle and treatment of the sewage. The biological autotrophic denitrogenation can be implemented in six ways: first, the sewage with the phosphorus removed biologically enters a nitrous acid biofilter, and then enters an ANAMMOX activated sludge reactor; second, the sewage enters a nitrous acid activated sludge reactor and subsequently enters an ANAMMOX biofilter; third, the sewage enters the nitrous acid biofilter, and then enters the ANAMMOX biofilter; fourth, the sewage enters the nitrous acid activated sludge reactor before entering the ANAMMOX activated sludge reactor; fifth, the sewage enters a single-segment biofilter reactor; and sixth, the sewage enters a single segment activated sludge reactor. The recycling and treating method for urban sewage in the invention has the advantages of good effect of sewage treatment, and low treatment costs.

The invention discloses a denitrifying phosphorus removal-anammox-shortcut nitrification integrated baffled reaction equipment, relating to a wastewater treatment device. The equipment disclosed by the invention is baffled reaction equipment which is suitable for achieving decarbonizing and denitriding and dephosphorization synchronously for wastewater with a low carbon-nitrogen ratio and wastewater with a high carbon-nitrogen-phosphorus concentration. The integrated baffled reaction equipment makes use of the biofacies separation characteristic and achieves coupling microorganisms with denitrifying phosphorus removal, anammox and shortcut nitrification functions through a backflow device and an aerating device so as to achieve decarbonizing and denitriding and dephosphorization synchronously for the wastewater with the low carbon-nitrogen ratio and wastewater with the high carbon-nitrogen-phosphorus concentration, and reduce organic carbon source consumption amount in the treatment process to a lower level to largely reduce produced surplus sludge. Packing layers are arranged in autotrophic functional microorganism cells to raise biological holding volume for the system. The device has advantages of simple structure, multifunction, low consumption and high efficiency, easy operation and management, stable operation and so on. The device can also achieve decarbonizing and denitriding and dephosphorization synchronously.

The invention discloses a low-carbon urban sewage biological phosphorus removal and autotrophic biological nitrogen removal device and a low-carbon urban sewage biological phosphorus removal and autotrophic biological nitrogen removal method. The device comprises a raw water tank, a biological phosphorus removal and half shortcut nitrification reactor, a secondary sedimentation tank, an intermediate water tank and an anammox reactor, wherein the biological phosphorus removal and half shortcut nitrification reactor is a university of cape town (UCT) reactor without internal returning of digestive fluid; the secondary secondary sedimentation tank is a radial-flow sedimentation tank; and the anammox reactor is an upflow anaerobic sludge blanket (UASB) reactor. The method comprises: introducing urban sewage first to the anaerobic zone of the biological phosphorus removal and half shortcut nitrification reactor for phosphorus release, then to an anoxic zone of the biological phosphorus removal and half shortcut nitrification reactor for denitrification and phosphorus absorption and finally to an aerobic zone for aerobic phosphorus absorption and half shortcut nitrification; subjecting mixed liquid containing ammonia nitrogen and nitrite nitrogen to sludge and water separation in the secondary sedimentation tank; and introducing the water to the anammox UASB reactor for autotrophic biological nitrogen removal under anammox action. When the method is used, process aeration can be reduced, energy consumption can be reduced, and carbon source is saved. The method is suitable for treating low-carbon sewage.

The invention discloses a granular sludge integrated autotrophic nitrogen removal device, which is provided with a water feed tank and an integrated anammox reactor, wherein the reactor is provided with a shell, a reaction area and a settling area are arranged in the shell, and the reaction area is provided with a microporous aerator, a fixed packing layer and a top area; the settling area is provided with an inclined plate settling area, an overflow weir and a water outlet pipeline; a guide plate and a reflow hole are formed between the reaction area and the settling area; the top of the reaction area has an air return port and an air outlet; and a sludge discharge pipeline is arranged at the bottom of the reaction area. The operating method comprises the following steps of (1) seeding sludge; (2) starting stage; and (3) continuous operation. The device and the method disclosed by the invention are suitable to be used for carrying out side treatment on high-ammonia-nitrogen and low-carbon-nitrogen-ratio digested sludge dewatering liquid in urban sewage treatment plants, and also suitable to be applied to the denitrification treatment of other high-ammonia-nitrogen industrial wastewater. The device and the method disclosed by the invention are perfect in process, simple in operation, agile in control, low in operation cost, good in sewage treatment effect and high in efficiency.

The invention relates to a method for starting a single-stage self-supported denitrification reactor, comprising the following steps: establishing a microflora with nitrosobacteria and nitrobacterium as the mainstay under the conditions of restricted supply of oxygen and small amount of available organic carbon source; then controlling ammonia nitrogen oxidization to nitrous acid phase through restricted oxygen supply so as to gather nitrosobacteria, inhibit growth of nitrobacterium and establish the microflora with the nitrosobacteria as the mainstay; optimizing the microenvironment where nitrosobacteria and anammox coexist by adjusting aeration modes and controlling dissolved oxygen level on the basis of the stable nitrous acid system, so as to promote growth and enrichment of the anammox and successfully start the single-stage self-supported denitrification reactor. The method of the invention solves the problem of inoculum source of the single-stage self-supported denitrification reactor, features simple and practical starting mode, reduced difficulty of starting the single-stage self-supported denitrification reactor and shortens times for starting the single-stage self-supported denitrification reactor.

The invention discloses a temperature-control UASB anaerobic ammoxygen denitrifying method and equipment, which comprises the following parts: cylinder (1) of UASB biological reactor, anaerobic sludge bed (2) on the lower part of cylinder (1), three-phased separator (3) on the top, temperature-control system (4) on the exterior of anaerobic sludge bed (2), wherein the anaerobic sludge bed (2) is active sludge after aerobic and anaerobic disposal in the SBR reactor, which cultures anaerobic ammoxygen strain tamed by microbe rapidly.

The invention discloses a polymorphic microorganism aggregate autotrophic nitrogen removal integrated device which is provided with a reaction tank, wherein the reaction tank is internally filled with microorganism aggregates and is provided with a water decanting device with a vertical push rod, fixed packing, an aerator, an online pH value detector, an online dissolved oxygen detector, an online ammonia nitrogen detector and an online nitrate nitrogen detector; the reaction tank is connected with a water inlet pipeline, a water outlet pipeline, a sludge outlet pipeline, an air pipeline, an overflow pipeline, a water inlet pump, a blast blower and an electrically operated valve; the reaction tank is also provided with an online gas flowmeter and a PLC (Programmable Logic Controller); the online gas flowmeter, the online pH value detector, the online dissolved oxygen detector, the online ammonia nitrogen detector and the online nitrate nitrogen detector are all connected with the PLC through signals. An operation method comprises the steps: (1) inoculating sludge; (2) carrying out habituated culture; (3) starting partial nitrification reaction; (4) inoculating anaerobic ammonium oxidization granular sludge; (5) proliferating the anaerobic ammonium oxidization granular sludge; (6) culturing an anaerobic ammonium oxidization bacterium biological film; (7) stably operating the autotrophic nitrogen removal integrated device. The polymorphic microorganism aggregate autotrophic nitrogen removal integrated device is suitable for denitrification treatment of medium and high concentration ammonia nitrogen sewage, simple in structure, high in degree of automation, good in denitrification effect and low in operation cost.

The invention discloses a method for treating total nitrogen in coal chemical wastewater by using microbes. The method is characterized in that the wastewater sequentially passes through a first aerobic tank, a first sedimentation tank, a facultative tank, a second aerobic tank and a second sedimentation tank to be subjected to two-stage biochemical treatment; microorganisms and microbial carriers are added into the first aerobic tank, the facultative tank and the second aerobic tank; before entering into the first aerobic tank, the wastewater passes through an Anammox tank, anammox bacterias and carrier activated carbon are added into the Anammox tank, and an aeration device and a mixing device are also arranged in the Anammox tank. The method disclosed by the invention is concise in technological process, and an Anammox tank is adopted in the first stage of the method, and different operation modes can be adopted according to different water qualities, so that the Anammox tank is adapted to fed water with different natures, thereby reducing the construction cost, improving the treatment capacity, and achieving an effect of energy conservation and consumption reduction. Because the total nitrogen is removed through two-stage A/O (hydrolytic acidification/oxic treatment) and anaerobic ammonia oxidation, the total nitrogen removal effect is obviously better than that achieved in the existing A/O process.

A method is provided for removing BOD and ammonium from wastewater in a mainstream process that includes deammonification. Wastewater including BOD and ammonium is directed to a first sequence batch reactor (SBBR). The wastewater is treated in the first SBBR and in the process nitrite is accumulated such that the wastewater includes a nitrite-to-ammonium stoichiometric ratio that enables anammox bacteria to effectively remove ammonium and nitrite from the wastewater. Thereafter the wastewater is directed the wastewater from the first SBBR to a second SBBR. The second SBBR is operated under anoxic conditions and employs anammox bacteria to remove ammonium and nitrite from the wastewater. In certain embodiments, a pre-denitrification step or process is employed in the first SBBR to remove BOD. In addition, in certain embodiments, the second SBBR includes an oxic phase for converting some ammonium to nitrite and, in some cases, an external carbon source is added to the wastewater under anoxic conditions to reduce the concentration of the nitrate in the wastewater.

The present invention describes a method of optimizing CO₂ concentration to increase the specific growth rate of Anammox bacteria and methanogens in wastewater and sludge treatment, as well as novel systems and methods of treating wastewater and sludge. The specific growth rate or doubling time of the Anammox bacteria and methanogens were determined to be sensitive to dissolved CO₂ concentration. Optimizing dissolved CO₂ concentration increases the specific growth rate of the Anammox bacteria, which may be used as an alternative biological nitrogen removal process for the treatment of domestic wastewater. In the method and system of treating sludge, the CO₂ stripper returns biogas with low CO₂ concentration to the headspace of an anaerobic digester in order to lower the headspace CO₂ concentration and therefore, the soluble CO₂ concentration. The lower soluble CO₂ concentration increases the specific growth rate of the methanogens for a more efficient anaerobic digestion process.

The invention discloses a method for starting salt tolerant anammox reactor applied to biological nitrogen removal of high salinity waste water (such as mariculture waste water and aquatic product processing waste water). Inoculated sludge is placed into an anammox reactor, the inoculated sludge comprises 1.65-69.12g/L of MLSS and 0.687-21.33g/L of MLVSS, operational conditions include that anaerobic environment is provided, temperature is 32.5-33.5 DEG C, HRT is two days, the concentrations of NH4+-N and NO2--N in inlet water are all 60-70mg/L and continuous culture is carried out until the concentrates of NH4+-N and NO2--N in effluent are all lower than 10mg/L; the concentrates of NH4+-N and NO2--N in inlet water are improved to be 70-160mg/L, HRT is 1-1.5 days, continuous culture is carried out for 20-50 days, the salinity of inlet water is regulated to be 5g/kg, 10g/kg, 15g/kg, 20g/kg, 25g/kg and 30g/kg respectively by virtue of sea water (the salinity of full sea water is 32g/kg), and continuous culture is respectively carried out on inlet water at each salinity until the concentrations of the NH4+-N and NO2--N in effluent are all lower than 20mg/L.

The invention provides a method for achieving partial short-cut nitrification-Anammox/denitrification of sewage by using sludge fermentation materials, and belongs to the field of treatment of sewagesludge. A device used by the method comprises a raw water tank, an SBR reactor, a sludge fermentation material storage tank and a residual sludge fermentation tank. The method comprises mixing residual sludge fermentation materials with domestic sewage for treating, and achieving the short-cut nitrification by using the sludge fermentation materials, wherein the inhibition of the sludge fermentation materials on nitrite oxidizing bacteria is far greater than the inhibition of the sludge fermentation materials on ammonia oxidizing bacteria. The method is specifically characterized in that in ananaerobic phase, polyphosphate accumulating bacteria are used for releasing phosphorus by using the sludge fermentation materials and carbon sources in raw water, and storing the inner carbon sources, in an aerobic phase, the partial short-cut nitrification is achieved through real-time control on DO and pH, in an anoxic phase, anaerobic ammonia oxidizing bacteria are used for converting ammonianitrogen and nitrite nitrogen into nitrogen and nitric nitrogen, and heterotrophic bacteria are used for reducing residual nitrite nitrogen and the generated nitric nitrogen into nitrogen by using theinner carbon sources. Through the method, the aeration intensity is reduced; meanwhile, the deep denitrification of the domestic sewage with a low C/N ratio and the reduction of exogenous sludge areachieved.

A process for treating ammonia containing wastewater includes bringing an ammonia-treating material and ammonia containing wastewater into contact with each other to remove ammonia in the wastewater continuously as nitrogen gas, the ammonia-treating material including a long carrier and complex bacterial sludge attached and immobilized on the biomass carrier, the carrier including a net, a nonwoven fabric or a woven fabric of fibers or filaments, the carrier being attached to a support, the complex bacterial sludge containing bacterial sludge including autotrophic anammox bacteria and bacterial sludge including autotrophic ammonia-oxidizing bacteria, the ammonia containing wastewater containing dissolved oxygen at a concentration of not less than 0.5 mg/l. The process for treating ammonia containing wastewater uses the treating material in which the bacterial sludge are attached and immobilized, and nitritation and anammox reaction can take place efficiently and economically even when the wastewater contains dissolved oxygen at a high concentration.

The invention relates to an integral bioreactor for garbage percolating liquid treatment, belonging to environment protection art. The bioreactor comprises of two biological reaction zones and an adjustment zone, and each biological reaction zone is filled with biological filler to make up aerobic and anaerobic zone. In the aerobic zone, the organics is degraded by aerobic heterotrophic bacteria to organic carbon and controls the ammonia nitrogen nitration in hitrosation stage, 50% ammonia nitrogen is oxygenated to nitrite, and the water outlet in the aerobic zone is mixed uniformly in the adjustment zone with PH modifier and then flows into the anaerobic zone. In the anaerobic zone, anaerobic ammonia-oxidizing bacteria reduces nitrite with ammonia nitrogen as electron donor and oxygenizes ammonia nitrogen with nitrite as electron acceptor, ammonia nitrogen and nitrous nitrogen transit into nitrogen, some organics is absorbed or degraded by other anaerobic microorganism. It can clear ammonia nitrogen and organics in the water quality of low carbon-nitrogen ratio of garbage percolating liquid, and adjust the water quality of garbage percolating liquid and the impact load of water, and the operation is effective and stable.

The invention belongs to the treatment field of waste water, and provides a method for converting active sludge into autotrophic denitrified sludge based on a mixed type continuous flow reactor. The method which is used for converting the common active sludge into the autotrophic denitrified sludge by the continuous flow reactor specifically comprises two stages. The first stage comprises the steps of: converting anaerobic or anoxic sludge into a nitrosation status by the condition which controls the organic matter concentration (COD (chemical oxygen demand) is less than 20mg/L), the water dissolved oxygen concentration (1-0.5mg/L), and the inflowing ammonia nitrogen concentration (50-450mg/L), and restraining the growth of the other microorganisms step by step by the running condition and the washing characteristic of the continuous flow reactor. When the cumulative percentage of the nitrite is more than 60%, the second stage is started. The second stage comprises the step of: promoting the nitrosation status to be converted into the autotrophic denitrification status by the condition which improves the ammonia nitrogen concentration (450-550mg/L), reduces the dissolved oxygen (0.5mg/L), and keeps a certain PH value (7.5-8.0) to form a system which is coupled nitrosified microorganism to anammox microorganism. The practice proves that the system can stably run for a long term. After entering into the practical running stage of the waste water treatment, the method leads the ammonia nitrogen removing rate and the total nitrogen removing rate to be respectively more than 80% and 70% by the reaction which is remained only by the natural reoxygenation or a small quantity of aeration without aeration.

The invention belongs to the field of water treatment, and discloses a method for intensifying the activity of anammox microorganism by the fixed effect of the active carbon. The method mainly comprises the steps of: soaking the active carbon by anammox-based inorganic salt solution, adding the treated active carbon and anammox sludge into the anammox-based inorganic salt solution, and cultivating to obtain the anammox microorganism which is stably coupled to the active carbon. Aiming the waste water with low carbon nitrogen ratio, the invention provides a technology which takes the active carbon as a carrier, intensifies the activity of the anammox microorganism, and resists the influence caused by the bad environment. The method can run for a long time more stably, can and accord with the condition for practically running and managing a sewage plant. The active carbon has a certain capability for absorbing the organic matter, so that the influence to the anammox sludge caused by the organic matter and the other toxic matters is reduced, and the execution of the anammox reaction is intensified.

The invention relates to an An/O type composite artificial wetland system for the enhanced treatment of low-C/N ratio wastewater. The invention relates to a wastewater treatment apparatus, which is a land treatment apparatus suitable for treating low-C/N ratio wastewater and recycling treated water. According to the An/O type composite artificial wetland system, wastewater sequentially flows through a horizontal subsurface flow wetland and a vertical subsurface flow wetland, effluent water part then flows back into the horizontal subsurface flow wetland, and a dissolved oxygen (DO) gradient is utilized to couple aerobic ammonia-oxidizing bacteria (AOB), nitrite-oxidizing bacteria (NOB) and anammox in the vertical subsurface flow wetland by means of effluent water level regulation in order to enhance the low-C/N ratio wastewater denitrification efficiency of the An/O type composite artificial wetland system. Broken bricks, oyster shells and other packing with large specific surface area, high porosity and good adsorbability are filled in the composite artificial wetland system, consequently, the amount of organisms held by the system is greatly increased, and high phosphorus-and-nitrogen-removing efficiency is guaranteed. The An/O type composite artificial wetland system has the advantages of simple structure, multiple functions, high efficiency, low cost and the like, is easy to operate and manage, can stably operate, and can synchronously remove carbon, nitrogen and phosphorus, the treated effluent water can be directly recycled, landscape plants can be planted on the ground surface, and the An/O type composite artificial wetland system can be combined with ecological construction and city and town greening functions.

A wastewater advanced denitrification apparatus and method employing single-stage SBBR (sequencing batch biofilm reactor) short-cut nitrification anammox coupling with endogenous denitrification belong to the field of wastewater bio-treatment. Wastewater enters a single-stage SBBR short-cut nitrification coupled endogenous denitrification reactor through a water pump; in anaerobic stirring phase, phosphorus-accumulating bacteria and glycogen accumulating organisms make use of an inorganic carbon source in raw water to store internal carbon sources; in hypoxic aeration stirring phase, ammonia oxidizing bacteria convert partial NH4<+>-N in the raw water into NO2<->-H, part of NO2<->-H is subjected to autotrophic nitrogen removal with the rest NH4<+>-N in the raw water via anammox effect, and the other part of NO2<->-H and little NO3<->-H produced in anammox are utilized by the phosphorus-accumulating bacteria and glycogen accumulating organisms in the subsequent anoxic stirring phase to provide endogenous denitrification. According to the method, by coupled application of short-cut nitrification, anammox and endogenous denitrification to wastewater bio-treatment, it is possible to provide wastewater advanced denitrification based on energy saving, and full utilization of carbon sources.

The invention belongs to the field of treatment and regeneration of urban sewage, and provides a quick starting method for a technology for simultaneous denitrification and COD removal under the condition of normal-temperature and low-C/N sewage. The method comprises the steps as follows: firstly inoculating some mature CANON sludge, and enabling the CANON sludge to perform biofilm culturing on volcanic rock filtering material, and quickly constructing an aerobiotic AOB and anammox oriented microbial system; then reducing the inflowing water substrate concentration and adjusting the aeration and hydraulic retention time, so as to improve the nitrogen removal load, and realize the high-load stable operation of the CANON technology under the condition of a medium ammonia nitrogen substrate; finally adding an organic carbon source into the inflowing water, performing heterotrophy for the growth of denitrifying bacteria, and controlling the temperature, free ammonia, aeration and other conditions, so as to optimize the aerobiotic AOB, anammox and denitrifying bacteria coexisted micro-environment, and successfully start an SNAD technology. According to the invention, the difficult problems that a large amount of organic carbon sources are required to be added for biological denitrification in the long term and the cost is prodigious are solved, and a method is provided for starting of the SNAD technology under the condition of normal-temperature and low-C/N simulated wastewater.

The invention discloses a method for rapidly forming an anammox granule sludge, and belongs to the field of wastewater treatment. Proper amount of an inoculated sludge is added to an SBR (Sequencing Batch reactor), a nutrient solution containing ammonia nitrogen and nitrite is added, the concentrations of both ammonia nitrogen and nitrite in the nutrient solution are both 50 mg/L, an AHLs quorum sensing signal molecule at certain concentration is added into the nutrient solution in the SBR each day, the environment temperature is 32-33 DEG C, the pH value is 7.8-8.3, the DO concentration is 0.15 mg/L or lower, and batch cultivation is conducted. The time for forming the anammox granule sludge is short, and the effect of the granule sludge is good.

The invention discloses a device and a method for strengthening sludge fermentation by FNA and realizing short-distance nitrogen and phosphorus removal of wastewater, and belongs to the field of wastewater and sludge treatment. The device comprises a raw water tank, an SBR reactor, an intermediate water tank, a UASB reactor, a sludge treatment reactor, and a sludge fermentation tank. According tothe method, FNA is used for inhibiting nitrite oxidizing bacteria to achieve short-cut nitrification and taken as sludge fermentation pretreatment step to promote the combination of hydrolysis and acidification, a part of sludge discharged by a short-range nitrification reactor is returned after being treated by FNA, and the other part of the sludge enters into the sludge fermentation tank. The SBR reactor firstly performs anoxic denitrification to remove excessive nitrite in the upper cycle, then anaerobic phosphorus release, aerobic phosphorus absorption and partial short-range nitrification, effluent enters UASB together with sludge fermentation broth, a part of ammonia nitrogen and nitrite are subjected to autotrophic nitrogen removal through anaerobic ammonia oxidizing bacteria, and residual nitrite and produced nitrate nitrogen are removed by denitrification of organic matters in the sludge fermentation broth. According to the invention, FNA is used for promoting the developmentof an internal carbon sources and realizing nitrogen and phosphorus removal of municipal wastewater, and the amount of the sludge is reduced, and the energy consumption of wastewater treatment is reduced.