170 results about "Anammox" patented technology

The invention belongs to the technical field of sewage treatment, and particularly relates to an anaerobic ammonia oxidation-photoelectric denitrification deep nitrogen removal method. The method comprises the following steps: firstly, adopting a double-chamber reactor; introducing part of sewage into the cathode chamber, carrying out Anammox reaction under a dark state condition to remove ammonia nitrogen and part of nitrite nitrogen, and synchronously generating nitrate nitrogen; turning on a light source to irradiate the anode chamber, exciting photo-induced electrons by a photosensitizer, transmitting the photo-induced electrons to the cathode chamber through an external circuit, and driving the sulfur autotrophic denitrification sludge to reduce residual nitrite nitrogen and nitrate nitrogen generated by Anammox; the total nitrogen removal rate is close to 100%. According to the invention, photo-induced electrons are used as the only denitrification electron donor, so that the addition of a carbon source / sulfide is thoroughly avoided, and the risk of secondary pollution is eliminated. The method is suitable for green low-carbon deep treatment of sludge digestion liquid and pharmaceutical wastewater high-ammonia-nitrogen low-carbon-nitrogen-ratio sewage.

The application discloses a method for efficient denitrification and decarburization of kitchen waste and sludge co-fermentation anaerobic digestion effluent, which removes part of COD and ammonia nitrogen in the influent sludge by using a first SNAD, and maintains a certain amount of free ammonia of a certain concentration due to the high concentration of ammonia nitrogen and the high pH of the influent, so as to maintain the inhibition effect on nitrifying bacteria and ensure the conversion of part of the ammonia nitrogen into nitrite nitrogen, and the high activity of anaerobic ammonia oxidation bacteria is ensured in the first SNAD by limiting the aeration amount, so that the ammonia nitrogen and nitrite can be further removed; the effluent enters a nitrification tank, and the ammonia nitrogen is nitrified into nitrate nitrogen under the condition of nitrifying bacteria and sufficient aeration amount, and then enters a denitrification tank, and the denitrification process is carried out under the condition of heterotrophic denitrifying bacteria and sufficient carbon source, so that most of the nitrate nitrogen in the system is converted into nitrogen gas and removed, finally, the clear liquid is discharged after being filtered by an MBR membrane in a membrane tank, so as to achieve the purpose of efficient denitrification and decarburization of kitchen waste anaerobic digestion effluent.

The invention provides a domestic sewage treatment method and system based on shortcut nitrification and anaerobic ammonia oxidation of Anammox bacteria preposed alkali reduction, and relates to the technical field of sewage treatment. The method comprises the following steps: anaerobic treatment: converting an organic suspended solid into an easily degradable carbon source through hydrolytic acidification bacteria; the carbon source is absorbed by denitrifying phosphorus-accumulating bacteria and denitrifying glycogen-accumulating bacteria and is stored as an intracellular carbon source; primary anoxic treatment: reacting ammonia nitrogen with nitrite through Anammox bacteria, and synchronously reducing alkalinity; aerobic treatment: under the condition of low alkalinity, in combination with low dissolved oxygen control, Comamox bacteria oxidize ammonia nitrogen into nitrite and accumulate the nitrite; and secondary anoxic treatment: denitrifying residual oxidation nitrogen into nitrogen by using intracellular carbon through denitrifying glycogen-accumulating bacteria. Through the synergistic effect of the hydrolytic acidification bacteria, the denitrifying phosphorus-accumulating bacteria, the Anammox bacteria, the Commox bacteria and the denitrifying glycogen-accumulating bacteria, efficient nitrogen and phosphorus removal is realized.

This invention discloses a composite sponge carrier for anaerobic ammonia oxidation, its preparation method, and its application, belonging to the field of wastewater treatment technology. The composite sponge carrier comprises: a porous polyurethane sponge and a composite component loaded on the surface and internal pores of the porous polyurethane sponge; wherein the composite component includes chitosan-modified biochar as a microbial affinity functional component and zeolite powder as a component for ammonia nitrogen adsorption and ion exchange regulation. This invention introduces more active functional groups and hydrophilic interfaces conducive to microbial attachment through chitosan modification, and then co-impregnates and loads it with zeolite powder onto the surface and pores of the polyurethane sponge. This improves the composite sponge carrier's retention and enrichment capacity for anaerobic ammonia oxidizing bacteria, improves the local substrate environment during the start-up phase, promotes rapid biofilm establishment, and enhances the system's operational stability.

This invention discloses a continuous-flow anaerobic bypass IFAS-AOA device and method for treating inert high-ammonia nitrogen wastewater, belonging to the field of biological treatment technology for high-ammonia nitrogen wastewater. The device consists of three parts: a raw water storage tank, a continuous-flow anaerobic bypass AOA reactor, and a sludge-water separation system. The effluent from the end of the anaerobic process enters the aerobic zone of the AOA reactor, while the anaerobic end-mixed liquor bypasses to the anoxic zone, mixes with the aerobic end-effluent, flows through the anoxic zone, and enters the sludge-water separation system. In the anaerobic zone, endogenous denitrifying bacteria store organic matter from the raw water as an intracellular carbon source and bypass to the anoxic zone. In the aerobic zone, short-cut nitrification coupled with anaerobic ammonia oxidation serves as the main nitrogen removal pathway. In the anoxic zone, anaerobic ammonia oxidation coupled with endogenous denitrification achieves deep nitrogen removal. The existence of anaerobic bypass allows some of the mixed liquor to bypass the aerobic zone and directly bypass to the anoxic zone, thus fully utilizing the carbon source in the raw water. This invention can achieve stable short-cut nitrification and effective retention of anaerobic ammonia oxidizing bacteria, showing broad application prospects.

The application discloses an iron-mediated EGSB type PD / anammox-FePs coupling system and a wastewater treatment method, and belongs to the technical field of wastewater treatment. The iron-mediated EGSB type PD / anammox-FePs coupling system comprises an EGSB reactor and a water inlet system. The water outlet end of the water inlet system is communicated with the bottom of the EGSB reactor. The water inlet system comprises an organic carbon source storage tank, an iron source storage tank, a nitrogen-containing wastewater storage tank, a pump body and pipelines. The organic carbon source storage tank, the iron source storage tank and the nitrogen-containing wastewater storage tank are respectively communicated with the bottom of the EGSB reactor through the pipelines. The pipelines are provided with a reflux pump and a circulating fan to optimize the flow state distribution. The iron mediation improves the nitrogen metabolism intensity and the electron transfer capacity of the system, optimizes the microbial community structure, promotes the formation of high-efficiency mass transfer particles, and then realizes the simultaneous and efficient removal of nitrogen and phosphorus under the condition of low HRT.

This invention relates to the field of wastewater treatment technology, and more particularly to a method for anaerobic ammonia oxidation denitrification in a conductive membrane bioreactor for wastewater with low concentrations of nitrite. Anaerobic ammonia-oxidizing bacteria are inoculated into a conductive membrane bioreactor; the bioreactor is connected to a DC power supply, with a conductive membrane assembly as the cathode and a three-dimensional porous or fibrous conductive carbon material with a high specific surface area as the anode, and a positive bias is applied to the anode; nitrogen-containing wastewater with a nitrite to ammonia nitrogen molar ratio of 1:1.5 to 1:5 is introduced into the electro-enhanced membrane bioreactor, where the anaerobic ammonia-oxidizing bacteria use the conductive carbon material at the anode as an extracellular electron acceptor for biological denitrification. This invention, based on a conductive membrane bioreactor, achieves efficient denitrification even under nitrite-deficient conditions through a dual approach of "electroadsorption enrichment + electrostimulation enhancement." This method is simple to operate, energy-saving, and has broad application prospects.

A biological treatment of sewage device and method for realizing advanced nitrogen removal of domestic sewage by half partical nitrification-anammox coupled with sulfur autotrophic denitrification. The device includes a raw water tank, a half partical nitrification reactor, a regulating water tank and an anammox coupled denitrification reactor. The domestic sewage enters the half partical nitrification reactor, a mass concentration ratio of NO2−—N to NH4+—N in effluent water is 1-1.32 through real-time control, and then the effluent water enters the intermediate water tank. After it enters the upflow anammox coupled with autotrophic denitrification granular sludge reactor, the synergistic reaction of anammox and sulfur autotrophic denitrification in the reactor achieves the nitrogen removal. The device and the method improve denitrification efficiency by making full use of the synergistic effect between microorganisms, thereby realizing high-efficiency and energy-saving advanced nitrogen removal of municipal sewage.

The invention discloses a sewage denitrification component based on compounding of MABR (Membrane Aerated Baffled Reactor) and flora colonization gel membrane filaments. According to the component, oxygen-permeable MABR membrane filaments and flora ecological colonization gel membrane filaments are packaged in a shell. Aerobic bacteria are enriched on the surface of the oxygen-permeable MABR membrane filaments by utilizing the oxygen-permeable characteristic of the oxygen-permeable MABR membrane filaments, so that short-cut nitrification from ammonia nitrogen to nitrite is realized; mutually-communicated micron-sized porous structures are arranged in the flora ecological planting gel membrane filaments, anaerobic ammonium oxidation bacteria can be loaded and protected in a high-density mode, the gel material wraps and slowly releases premixed nutrients, and flora activity is maintained. Through the spatial adjacent arrangement of the two membrane filaments, efficient coupling of short-cut nitrification and anaerobic ammonium oxidation is realized, and anaerobic ammonium oxidation bacteria directly utilize generated nitrite and residual ammonia nitrogen to generate nitrogen, so that efficient denitrification is completed in a single component. The design effectively solves the problems that anaerobic ammonium oxidation bacteria are difficult to enrich and are easily inhibited by dissolved oxygen, and has the advantages of high denitrification efficiency, low energy consumption, quick start, stable operation and the like.

The invention discloses a deep denitrification system and method for driving Coammox and Anammox synergism by utilizing micro-current Fe-Cu bipolar biological electrode particles, and belongs to the technical field of biological sewage treatment and microorganism enrichment. The system comprises an SBR (Sequencing Batch Reactor) added with Fe-Cu bipolar biological electrode particles, an aeration and control system and a DO / ORP (Dissolved Oxygen / Oxidation Reduction Potential) online monitoring device. Under the condition of ultralow dissolved oxygen, through microampere-level current and by utilizing the ecological niche advantages of in-situ slow release of Fe and Cu trace elements and active reinforcement of Comammox and Anammox of a bipolar electrode and electron directional flow in a nitrogen metabolism process, metabolic synergy and spatial copolymerization of Comammox and Anammox are driven, so that high enrichment and efficient deep denitrification of Comammox and Anammox are realized under the mainstream ammonia nitrogen concentration (40mg-N / L). The system does not need an organic carbon source, is simple in process and stable in operation, can remarkably reduce aeration energy consumption and material consumption, is suitable for low-carbon deep denitrification and upgrading and reconstruction of municipal sewage treatment, and provides a new insight for global biological nitrogen circulation.

This invention discloses a device and method for rapid start-up and stable operation of IFAS-PN / A based on microfiltration membrane retention. The device includes a reactor body, an influent system, an effluent system, an aeration system, a heating system, an online monitoring system, and a stirring system. The reactor contains a biofilm carrier frame and a submerged MBR membrane module. The biofilm carrier frame is connected to a stirrer, and the MBR membrane module is connected to an effluent tank via an effluent peristaltic pump. During start-up, the anaerobic ammonia-oxidizing bacteria biofilm packing is fixed on the carrier frame and inoculated with activated sludge. The effluent is filtered through the microfiltration membrane, achieving complete retention of functional bacteria and precise control of sludge retention time. During operation, the peristaltic pump is started and stopped in conjunction with the influent and effluent level gauges to maintain a constant water level; precise adjustment of the target SRT is achieved through sludge discharge. This invention solves the problems of easy loss of functional bacteria, long start-up cycles, and poor operational stability, achieving efficient and stable denitrification of wastewater, with advantages of rapid start-up, stable operation, and precise control.

The invention relates to the technical field of sewage treatment, and discloses a sewage treatment system and method for photocatalytic coupling biological treatment.The sewage treatment system for photocatalytic coupling biological treatment.The sewage treatment system for photocatalytic coupling biological treatment.The sewage treatment system for photocatalytic coupling biological treatmentcomprises a pretreatment unit, a photocatalytic unit, an electrochemical biological unit, a post-treatment unit and an intelligent control unit, the pretreatment unit comprises a microwave-ozone coupling reactor and a magnetic adsorption column; the photocatalysis unit comprises a dual-band reaction tower; the electrochemical biological unit comprises a three-dimensional electrode biological membrane assembly and a FeS2 filler layer, the anode of the three-dimensional electrode biological membrane assembly is boron-doped diamond, and the cathode of the three-dimensional electrode biological membrane assembly is a carbon felt of anaerobic ammonium oxidation bacteria. Through multi-stage cooperative treatment, heavy metal ions and organic matters in the sewage are effectively removed, the removal rate of the heavy metal Cr (VI) is greater than 99.9%, the removal rate of the refractory organic matter benzene is greater than 99.9%, and the method has multi-scene applicability and efficient treatment capacity.

The present application relates to a wastewater treatment method and device for synchronous autotrophic-heterotrophic coupled anaerobic ammonia oxidation denitrification, the device comprising a SBR reactor and an aeration pump; the aeration pump is connected with the SBR reactor, used for adjusting the aeration intensity in the SBR reactor; a partition is arranged inside the SBR reactor; the partition divides the inside of the SBR reactor into two communicating parts along the longitudinal direction, a micro-aerobic functional area and a limited-oxygen functional area, so that the substances in the micro-aerobic functional area and the limited-oxygen functional area can flow to each other; the micro-aerobic functional area is used for oxygen-demanding bacteria metabolism, and the limited-oxygen functional area is used for anoxic bacteria metabolism. The present application realizes the cycle of NO2 ‑ -N by adjusting the aeration intensity, using the micro-aerobic and limited-oxygen environment, and the influent organic matter and nitrate by-products in the synchronous autotrophic-heterotrophic metabolism process, reduces the difficulty of NOB inhibition, and strengthens the anammox performance, and efficiently removes nitrogen.

This invention belongs to the field of wastewater denitrification technology, specifically an integrated zoned denitrification method based on anaerobic ammonia oxidation reaction, comprising the following steps: S1, removing high concentrations of organic matter and suspended solids from wastewater through coagulation sedimentation or chemical oxidation pretreatment to avoid inhibition of subsequent Anammox treatment; S2, dividing the integrated reactor into zones, setting up a short-cut nitrification zone and an Anammox reaction zone; S3, partially recirculating the effluent from the Anammox reaction zone back to the short-cut nitrification zone to replenish nitrite and balance the carbon-nitrogen ratio; recirculating Anammox granular sludge to the reaction zone through a sedimentation zone to maintain biomass concentration and reaction efficiency; S4, setting up a secondary sedimentation tank or an internal sedimentation zone to achieve sludge-water separation, discharging excess sludge and ensuring effluent meets standards. This invention ensures stable denitrification efficiency by dynamically adjusting the dissolved oxygen in the short-cut nitrification zone and the pH value in the Anammox reaction zone.

The present disclosure provides a sewage treatment method and an execution system, comprising: under the conditions of stirring and anaerobic, absorbing and releasing phosphate by anaerobic phosphorus release and internal carbon source conversion reaction in the first sewage, taking the carbon-containing organic matter in the first sewage as a carbon source, to obtain the second sewage; performing aerobic treatment on the second sewage, determining the relative activity of aerobic phosphorus accumulating bacteria and aerobic ammonia-oxidizing bacteria in the second sewage according to the pH value change trend of the second sewage; treating the second sewage by using a multi-stage aeration mode according to the relative activity, adjusting the dissolved oxygen concentration by adjusting the aeration mode of the multi-stage aeration, to occur integrated nitritation-anammox and aerobic phosphorus absorption reaction, to obtain the third sewage; under the conditions of stirring and anaerobic, performing deep phosphorus and nitrogen removal on the third sewage by anaerobic ammonia oxidation reaction, denitrification phosphorus removal reaction and internal carbon source denitrification reaction to obtain the fourth sewage; standing the fourth sewage to separate the sludge and water, and outputting the sewage obtained after the sludge and water separation.

The present application provides a kind of short-range nitrification anaerobic ammonia oxidation based granular sludge biological selector and wastewater treatment method and application.The selector includes: water collecting pool, water inlet pipe and sludge return pipe, the inlet end of the water inlet pipe is used to access wastewater, the outlet end is inserted into the bottom of the water collecting pool;The bottom of the water collecting pool is provided with aeration disc, and the upper portion of the aeration disc is provided with a sedimentation tank;Gas pipe is passed into the sedimentation tank from the upper portion, and the middle portion of the sedimentation tank is provided with a water collecting tank, and the bottom of the water collecting tank is connected with a water outlet pipe leading to the outside of the water collecting pool;The inlet end of the sludge return pipe is inserted into the bottom of the sedimentation tank, and the outlet end is inserted into the bottom of the water collecting pool;Wherein, the number of the sludge return pipe is multiple, and the outlet end of multiple sludge return pipes is arranged in the form of vortex, to increase the shear force of water flow to facilitate granulation, so that sewage and sludge are uniformly mixed.

The invention provides a two-stage HRBPR-PN / A process and device based on sludge biological enhancement. In the front section of the process, an endogenous carbon source is taken in and phosphate is released in an anaerobic stage through phosphorus-accumulating bacteria (PAOs), and then excessive phosphorus is absorbed in an aerobic stage. And the rear stage is an anaerobic / aerobic alternate operation short-cut nitrification anaerobic ammonia oxidation (PNA) process, under the condition of low dissolved oxygen, ammonia oxidizing bacteria AOB and anaerobic ammonia oxidizing bacteria AnAOB cooperate to efficiently remove nitrogen, and meanwhile, residual organic matters in the previous stage and nitrate in the system are removed by strengthening endogenous denitrification. The method comprises the following steps: introducing residual sludge containing a small amount of AOB from an HRBPR section, and periodically adding the residual sludge into a PN / A reactor according to a volume ratio of 0.1-5%; according to the process, segmented DO control is adopted, NOB ecological niche inhibition and short-cut nitrification long-term stability are achieved, and synchronous deep nitrogen and phosphorus removal can be achieved without additional carbon sources and chemical agents. The device has the advantages of low energy consumption, low sludge yield, high operation stability and the like, and is suitable for energy-saving and efficient treatment of urban low-C / N-ratio sewage.

The present application relates to the field of expressway service area wastewater treatment, and particularly relates to a kind of expressway service area wastewater treatment method based on anaerobic ammonia oxidation enhanced AOOA-MBBR.Method includes: first, preparation reactor;Second, start reactor and inoculate bacteria, in this step, after the preset time of effluent stable operation, hydraulic retention time is gradually shortened to 20h;Third, anaerobic ammonia oxidation enhancement: after the preset time of effluent stable operation, using the packing of biofilm anaerobic ammonia oxidation bacteria replaces part of the packing in each pool;The dissolved oxygen concentration in the first aerobic tank is 0.2mg / L, the dissolved oxygen concentration in the second aerobic tank is 0.5-0.8mg / L;Part of the expressway service area wastewater is directly pumped into the second anoxic tank after adding manganese sulfate;Fourth, after the effluent is stable, enter the stable stage.The present application can make the total nitrogen and total phosphorus of effluent reach the corresponding discharge standard when the hydraulic retention time is 20h, thereby improving the expressway service area wastewater treatment efficiency, and avoiding the subsequent phosphorus removal problem.

A device and method for treating urban domestic sewage based on a two-stage combined process of partial denitrification-anammox belong to the field of biological sewage treatment. The device includes a raw water tank, a sequencing batch biofilm reactor (SBBR), an intermediate water tank, an up-flow anaerobic sludge bed (UASB) and a water outlet tank. A part of urban domestic sewage enters the SBBR and is mixed with residual sewage in the last cycle, a partial denitrification-anammox reaction is carried out under a stirring condition to remove nitrate nitrogen and a part of ammonia nitrogen, followed by a nitrification under an aeration condition to completely convert ammonia nitrogen into nitrate nitrogen, and effluent enters the intermediate water tank; and the other part of the urban domestic sewage is mixed with the effluent of the SBBR and continuously enters the UASB, and nitrite nitrogen, which is generated by nitrate nitrogen reduction, and ammonia nitrogen, are removed by means of anammox. According to the present invention, with no need of adding an external carbon source, organic matters in sewage can be effectively removed, the nitrogen removal efficiency of urban domestic sewage is improved, and efficient and low-consumption nitrogen removal is realized.

The application discloses a gel carrier suitable for low-temperature sewage treatment, a preparation method and application, and the gel carrier is divided into two layers, the upper layer of the gel carrier is a light-heat conversion layer, and the lower layer of the gel carrier is a microbial growth layer, anaerobic ammonia oxidation bacteria are embedded in the lower layer of the gel carrier, the thickness ratio of the light-heat conversion layer to the microbial growth layer is controlled to be 1-1.5:4, magnetic nanoparticles are added in the gel preparation process to form a heterojunction, the microenvironment temperature is improved through a light-heat-magnetic heat synergistic effect, the low-light limitation in winter is broken, and the reactor can be rapidly started under a low-temperature condition of 15 DEG C. The prepared gel carrier can decompose nitrogen-containing pollutants in wastewater in an anaerobic environment.

The invention relates to the technical field of wastewater treatment, and particularly provides a method for improving the anaerobic ammonia oxidation denitrification effect of high-ammonia-nitrogen wastewater. The method is realized by adding one or more enhancer combinations into a reaction system, wherein the enhancer is selected from vitamin B6, siderophore catechin (CAT) and siderophore hydroxyethyl ethylenediamine triacetic acid (HEDTA). By adding the enhancer, the inhibition effect of a high-ammonia-nitrogen environment on anaerobic ammonium oxidation functional flora can be effectively relieved, and the metabolic activity and the proliferation rate of the anaerobic ammonium oxidation flora are remarkably enhanced. The method is simple and convenient to operate and low in cost, can greatly improve the denitrification efficiency and operation stability of the system under high ammonia nitrogen load on the premise of not changing the structure of the existing reaction system, and is suitable for treating high ammonia nitrogen wastewater such as mine leaching tail water, landfill leachate and the like.

The present application relates to a method for realizing anaerobic ammonia oxidation bacteria enrichment under the joint regulation of NLR and HRT in the field of sewage biological treatment technology, which aims at the problems of anaerobic ammonia oxidation bacteria being greatly affected by the environment and slow enrichment, etc. + -N and NO2 ‑ -N is pumped into the SBR reactor, and the enrichment of anaerobic ammonia oxidation bacteria is successfully realized by continuously changing the hydraulic retention time and the substrate concentration of the influent. The total nitrogen removal rate is stably maintained at 75%, which has good removal efficiency, and the flexible regulation of the reactor is beneficial to the rapid start of the anaerobic ammonia oxidation reactor, providing a theoretical reference for the practical application of the Anammox process. It is simple to operate, easy to manage, has high treatment efficiency, and has good popularization and application prospect.

The partitioned aeration internal circulation up-flow short-cut nitrification and anaerobic ammonia oxidation reaction system is characterized by simple design structure of the main reactor, the aeration head arranged in the middle of the internal circulation up-flow reactor, the formation of the aerobic region and the anoxic region in the upper part and the lower part of the single reaction zone respectively, the suitable growth environment of the aerobic ammonia oxidation microorganism and the anaerobic ammonia oxidation bacteria in the single reactor, the nitrite produced by the aerobic ammonia oxidation microorganism in the aerobic region of the upper part of the reactor can re-enter the anoxic region of the lower part of the reactor through the internal circulation route of the reaction zone to supply the growth of the anaerobic ammonia oxidation bacteria in the anoxic region, and the improvement of the overall denitrification efficiency of the reactor. The present application belongs to the technical field of wastewater denitrification.

The present application relates to a kind of for urban sewage low-carbon deep denitrification improved AOA device and utilize the composition to sludge deep dewatering method.The device described in the present application is sequentially connected to be provided with water inlet tank, anaerobic tank, the aerobic tank with MABR membrane module, anoxic tank and secondary sedimentation tank, the present application is provided with the aerobic tank with MABR membrane module, and it is more easy to realize partial nitrification of ammonia nitrogen for processing urban sewage, and the remaining ammonia nitrogen can be used for anaerobic ammonia oxidation.In addition, under low DO concentration, compared with the aerobic tank in the prior art, the N2O generated by the MABR membrane module provided in the present application will be lower, by utilizing internal carbon source PHA and glycogen for short-term denitrification to generate nitrite nitrogen for anaerobic ammonia oxidation bacteria to utilize, for mainstream urban sewage anaerobic ammonia oxidation denitrification provides a new way.

The present application provides a kind of denitrification process and denitrification system of rare earth tail water.The denitrification process includes: step S1, the pretreatment of rare earth tail water is carried out, and pretreated tail water is obtained;Step S2, pretreated tail water is subjected to multiple partial nitrification-anammox denitrification treatment, and primary denitrification wastewater is obtained;And step S3, primary denitrification wastewater is subjected to CANON process denitrification, and denitrification water and sludge are obtained.The above method is subjected to multiple partial nitrification-anammox denitrification treatment and CANON process, so that the nitrogen in rare earth tail water is converted into N2 and removed, achieving the purpose of wastewater denitrification.And the advantages of partial nitrification-anammox are fully retained in the above process, and effective denitrification can be achieved without adding organic carbon source.

The application discloses an anaerobic ammonia oxidation treatment method for high-ammonia-nitrogen wastewater and belongs to the technical field of wastewater purification, and is used for solving the technical problems that in the prior art, anaerobic ammonia oxidation bacteria have a long cultivation time, anaerobic ammonia oxidation sludge cannot be self-repaired when treating wastewater, anaerobic ammonia oxidation bacteria in active sludge are prone to adhering to fillers when biodegrading wastewater with high ammonia-nitrogen content, the concentration of anaerobic ammonia oxidation bacteria is reduced, and long-acting removal effect of ammonia-nitrogen in wastewater is poor, the application is characterized in that after the combination of active sludge is optimized, the wastewater reactor is matched, ammonia-nitrogen impurities in wastewater can be effectively removed, the activity of active sludge can be maintained, and long-acting anaerobic ammonia oxidation treatment effect on high-ammonia-nitrogen wastewater is achieved.

The present invention relates to the field of treatment of wastewater from express highway service areas, and in particular relates to a method for treating wastewater from express highway service areas based on anammox-enhanced AOOA-MBBR. The method comprises: step I, preparing a reactor; step II, starting up the reactor and inoculating bacteria, in which step, the hydraulic retention time is gradually shortened to 20 h after an effluent stably runs for a preset time; step III, anammox enhancement, involving: after the effluent stably runs for the preset time, respectively replacing some of a filler in each tank with a filler carrying a biofilm of anammox bacteria, wherein the dissolved oxygen concentration of a first aerobic tank is 0.2 mg / L, and the dissolved oxygen concentration of a second aerobic tank is 0.5-0.8 mg / L, adding manganese sulfate to some of the wastewater from express highway service areas, and then directly pumping the resulting mixture into a second anoxic tank; and step IV, after the effluent is stable, entering a stable stage. By means of the present invention, the total nitrogen and total phosphorus of the effluent can meet corresponding discharge standards at a hydraulic retention time of 20 h, thereby improving the treatment efficiency of wastewater from express highway service areas and avoiding the problem of subsequent phosphorus removal being troublesome.

The present application relates to high ammonia nitrogen wastewater treatment technical field, especially in one kind of integrated autotrophic denitrification device and method, wherein, one kind of integrated autotrophic denitrification device includes: pretreatment component, short path nitrification component, anaerobic ammonia oxidation component, collection and sludge discharge component, process insulation component, identification monitoring component, identification and determination component;The identification and determination component is analyzed according to the real-time image of the anaerobic ammonia oxidation bacteria distribution obtained and issues corresponding adjustment signal, or, alarm signal, so that the operation parameters of the determining device each component are adjusted accordingly.The present application provides a kind of short path nitrification and anaerobic ammonia oxidation combination mode, realizes partial short path nitrification, solves the accumulation problem of anaerobic ammonia oxidation bacteria, provides anaerobic ammonia oxidation bacteria for short path nitrification system, improves denitrification efficiency, and the device is self-regulating, strengthens the stability of device operation, so that the device can be long-term and stable operation.

The invention relates to the field of biological denitrification sewage treatment, and particularly discloses a device and a method for anaerobic ammonium oxidation bacteria enrichment and enhanced denitrification in an AOA process. A device for anaerobic ammonium oxidation bacteria enrichment and enhanced denitrification in an AOA process comprises a raw water tank, an AOA bioreactor, a secondary sedimentation tank and a PLC, the AOA bioreactor comprises an anaerobic zone, a high-load aerobic zone, a low-load aerobic zone, an anoxic zone and a reoxygenation zone, a first filler screen box is arranged in the high-load aerobic zone, and a second filler screen box is arranged in the anoxic zone; the method comprises the following steps that sewage sequentially flows through a high-load aerobic zone, a low-load aerobic zone, an anoxic zone and a reoxygenation zone from an anaerobic zone and is precipitated in a secondary sedimentation tank, and supernate is effluent. The device and the method are matched for use, the abundance and the activity of anaerobic ammonium oxidation bacteria in an anoxic zone of the system can be improved through a biological membrane alternate circulation strategy, and the autotrophic nitrogen removal efficiency of the system is improved.

The utility model relates to the technical field of sewage treatment, in particular to a low-temperature reactor for stable coexistence of short-cut denitrification and anaerobic ammonia oxidation, which not only realizes the synergistic effect of short-cut denitrification and anaerobic ammonia oxidation through a partition design and a heat preservation structure to realize the efficient cooperation of two florae, but also precipitates and preserves sludge, so that the sewage treatment efficiency is improved. A proper growth environment is provided for anaerobic ammonium oxidation flora, and the sufficient number of the flora is ensured; comprising a low-temperature reactor; the device further comprises a heat exchange mechanism, a cleaning mechanism, a precipitation mechanism and a sludge discharging mechanism, the heat exchange mechanism is installed on the low-temperature reactor and facilitates heating of inlet water through waste heat, the cleaning mechanism is installed on the heat exchange mechanism and avoids sludge residue blocking, and the precipitation mechanism is installed on the low-temperature reactor and facilitates sludge precipitation culture of oxygen ammonia oxidizing flora. The sludge discharging mechanism is mounted on the precipitation mechanism and is used for discharging sludge.