255 results about "Anammox" patented technology

The invention belongs to the technical field of wastewater denitrification treatment, and particularly relates to an anaerobic ammonia oxidation reaction-based integrated partitioned denitrification method which comprises the following steps: S1, removing high-concentration organic matters and suspended matters in wastewater through coagulating sedimentation or chemical oxidation pretreatment to avoid inhibition on subsequent Anammox; s2, partitioning the integrated reactor, and setting a short-cut nitrification region and an Anammox reaction region; s3, enabling the effluent part of the Anammox reaction zone to flow back to the short-cut nitrification zone, supplementing nitrite and balancing the carbon nitrogen ratio; the Anammox granular sludge flows back to the reaction zone through the settling zone, and the biomass concentration and the reaction efficiency are maintained; s4, a secondary sedimentation tank or a built-in sedimentation zone is arranged to achieve mud-water separation, residual sludge is discharged, and it is guaranteed that effluent reaches the standard, and it is guaranteed that the denitrification efficiency is stable by dynamically adjusting dissolved oxygen of the short-cut nitrification zone and the pH value of the Anammox reaction zone.

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 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 invention relates to the field of wastewater treatment, and discloses a method for treating nitrogen-containing wastewater based on sulfur autotrophic DNRA and anaerobic ammonia oxidation, which comprises the following steps: firstly, introducing nitrogen-containing wastewater into an Anammox reactor, inoculating granular sludge taken from a secondary sedimentation tank of a sewage treatment plant into the Anammox reactor, carrying out anaerobic ammonia oxidation reaction, controlling hydraulic retention time, and carrying out anaerobic ammonia oxidation treatment on the sludge; the method comprises the following steps: pumping effluent and sulfur source inlet water into an sDNRA reactor together, inoculating ordered batch sDNRA sludge into the sDNRA reactor, performing DNRA action under sulfide driving in a stirring state, and controlling hydraulic retention time to realize automatic effluent. According to the method disclosed by the invention, a carbon source does not need to be added, byproducts generated along with complex carbon metabolism can be effectively reduced, the cost can be effectively reduced while secondary pollution is avoided, the total nitrogen removal rate of the system can be successfully improved, and the generation of greenhouse gas N2O is reduced.

A mainstream anaerobic ammonia oxidation enhanced denitrification device and method based on a fluidized bed biofilm. By arranging reaction tanks, switching of two operation modes can be achieved, and recovery of instability in starting and running periods is completed. A denitrification pathway comprises: implementing denitrification and partial denitrification-anaerobic ammonia oxidation synergy in an anoxic zone; and implementing nitrification, synchronous nitrification and denitrification, and partial nitrification-anaerobic ammonia oxidation synergy in an aerobic zone. Implementation of anaerobic ammonia oxidation for denitrification in the anoxic zone or the aerobic zone requires first enhancement of an aerobic biofilm, enhancement of the thickness of the biofilm under the action of high DO, and formation of an internal anoxic / anaerobic layer, thereby providing conditions for enrichment of anaerobic ammonia oxidizing bacteria.

The invention belongs to the field of industrial wastewater treatment, and relates to an iron autotrophic denitrification coupling anaerobic ammonia oxidation combined enrichment culture device and method. Comprising a water inlet tank, a No.1 anoxic reactor, an intermediate tank and a No.2 anaerobic reactor, the water inlet tank is provided with a water outlet pipeline of the water inlet tank, and the water outlet pipeline of the water inlet tank is connected with the No.1 anoxic reactor; the anoxic reactor I is provided with a water outlet pipeline of the anoxic reactor I, and the water outlet pipeline of the anoxic reactor I is connected with the intermediate tank; the intermediate tank is provided with an intermediate tank water outlet pipeline, and the intermediate tank water outlet pipeline is connected with the No.2 anaerobic reactor; the No.2 anaerobic reactor is provided with a No.2 anaerobic reactor water outlet pipeline; the No.2 anaerobic reactor water outlet pipeline is connected with the No.1 anoxic reactor. According to the invention, collaborative culture of autotrophic denitrification bacteria and anaerobic ammonium oxidation bacteria can be realized, an autotrophic denitrification effect provides a certain amount of nitrite and iron ions to promote anaerobic ammonium oxidation reaction, and an anaerobic ammonium oxidation effect can effectively prevent an autotrophic denitrification tank body from being mineralized.

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.

A method for in-situ efficient enrichment of anaerobic ammonia oxidation bacteria, comprising: using anaerobic digestion sludge as inoculation sludge and using nitrate wastewater as an influent substrate, the inoculation sludge and the influent substrate reacting with each other under a light-proof, constant-temperature and closed condition so as to enrich anaerobic ammonia oxidation bacteria. After the anaerobic ammonia oxidation bacteria are enriched about 30 days by using the anaerobic digestion sludge as the inoculation sludge and the nitrate wastewater as the influent substrate, the number of functional genes HzsB of the anaerobic ammonia oxidation bacteria is increased by about 100 times than that in a control group (using a liquid mixture of ammonia nitrogen and nitrite nitrogen as an influent substrate). Thus, on one hand, there is no need to add extra ammonia nitrogen and nitrite nitrogen, and on the other hand, there is no need to regulate and control complex process parameters. Therefore, in-situ rapid and sustainable enrichment of anaerobic ammonia oxidation bacteria can be implemented in wastewater treatment plants simply by means of an economical and simple operation mode.

The invention discloses a rapid propagation method for anaerobic ammonia oxidation granular sludge driven by a carbon nucleus. The method comprises the following steps: 1, selecting agricultural waste sawdust as a raw material to prepare biochar; the method comprises the following steps: directly adding biochar into an EGSB reactor to serve as a nucleation carrier of granular sludge; step 2, setting operation conditions of the EGSB reactor; 3, adding flocculent anaerobic ammonia oxidation sludge into the EGSB reactor, and promoting the sludge to be converted from flocculent to granular through the synergistic effect of biochar induction and hydraulic shear force; and step 4, carrying out sludge enrichment and system load regulation and control, and finally forming carbon nucleus Anammox particles. According to the invention, the rapid formation of the carbon nucleus Anammox granular sludge is realized, and the settling performance of the sludge and the denitrification efficiency of the system are greatly improved.

The present invention discloses a novel device for culturing and proliferating anaerobic ammonia-oxidizing bacteria, including a reactor, a water inlet mechanism, a negative pressure forming mechanism, a low-voltage power supply, an anode, a cathode, a constant temperature mechanism and a water outlet mechanism. The reactor is provided with a reaction tank body and a water bath from the inside to the outside, the water bath is wrapped around the outside of the reaction tank body, a containing chamber is provided in the reaction tank body, the water inlet mechanism is connected to the bottom of the containing chamber, the water outlet mechanism is connected to the upper part of the containing chamber, the negative pressure forming mechanism is installed above the reactor and is connected to the containing chamber, and is used to form a negative pressure environment in the containing chamber, the anode and the cathode are symmetrically installed in the containing chamber, and are respectively electrically connected to the positive and negative poles of the low-voltage power supply, and the constant temperature mechanism is connected to the water bath, and the water in the water bath is circulated and kept warm. The present invention adopts a novel device that combines a specific negative pressure with a low voltage and a specific reaction tank body, and cooperates with a culturing method to achieve rapid recovery of the activity of anaerobic ammonia-oxidizing sludge and promote the proliferation of anaerobic ammonia-oxidizing bacteria.

Disclosed in the present invention are an electrochemically enhanced anaerobic-ammonium-oxidation membrane bioreactor based on a conductive separation membrane, and a biological nitrogen-removal method using same. The membrane bioreactor comprises a reactor shell, an anode, a cathode, a direct-current power supply, a water intake line and a water output line, wherein anaerobic-ammonium-oxidation bacteria are loaded into the reactor shell, and a water inlet is provided at the bottom of the reactor shell and is connected to the water intake line; the anode and the cathode are located in the reactor shell; a positive electrode of the direct-current power supply is connected to the anode, and a negative electrode of the direct-current power supply is connected to the cathode; and the cathode is a conductive membrane assembly, and a water outlet is provided at the top of the conductive membrane assembly and is connected to the water output line. In the present invention, a membrane biological treatment is coupled with an electrochemical technique, such that anaerobic-ammonium-oxidation bacteria can be effectively retained and enriched, the nitrogen-removal effect of the anaerobic-ammonium-oxidation bacteria is enhanced, and membrane fouling is alleviated by means of electrostatic repulsion. The device has a good nitrogen-removal performance, effectively alleviates membrane fouling, is easily operated and has broad application prospects.

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.

The invention discloses a device and a method for realizing double-short-range coupling anaerobic ammonia oxidation sewage denitrification by combining biologically-enhanced carbon capture with a two-stage membrane aeration bio-membrane reactor. A high-load activated sludge device and an anaerobic fermentation tank are used for carbon source extraction, and a carbon source is provided for a subsequent anoxic tank. The two-stage MABR system adopts a hollow fiber membrane to perform bubble-free membrane aeration, and oxygen is diffused to form an oxygen concentration gradient, so that the surface of the membrane is divided into an oxygen-rich region and an oxygen-poor region. In the aerobic section, the dissolved oxygen gradient of a biological membrane is regulated and controlled to construct a nitrifying bacterium and anaerobic ammonium oxidation bacterium function partition, so that short-cut nitrification coupled anaerobic ammonium oxidation synergistic denitrification is realized; in the anoxic section, nitrate nitrogen and part of ammonia nitrogen are reduced and COD (Chemical Oxygen Demand) is removed through the synergistic effect of short-cut denitrification and anaerobic ammonia oxidation and synchronous nitrification and denitrification on the surface of the membrane. The two-stage MABR synergistic carbon capture device denitrification system constructed by the method realizes efficient and stable deep denitrification, reduces the addition of a carbon source and the yield of sludge, and saves energy consumption.

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 specification describes a membrane aerated biofilm reactor (MABR) and processes for nitritation, nitritation-denitritation or deammonification. The supply of oxygen through the gas-transfer membrane is limited to suppress the growth of nitrite oxidizing bacteria (NOB). Exhaust gas from an MABR unit may have an oxygen concentration of 4% or less. The process can optionally include one or more of: intermittent (batch) feed of process air; process air modulation; process air direction reversal; process air recycle; and, process air cascade flow. The process can optionally include adding a seed sludge containing anammox to a reactor, optionally after pre-treatment and selection. The process can optionally include pre-seeding an MABR media.

The present application belongs to the field of sewage biological treatment technology, and particularly relates to a device and method for realizing simultaneous denitrification and phosphorus removal by short-cut nitrification / anaerobic ammonia oxidation based on sludge side chlorination treatment, comprising a water inlet tank, an AO reactor connected with the outlet of the water inlet tank, a secondary sedimentation tank connected with the outlet of the reactor, and a sludge chlorination pretreatment reactor connected with the outlet of the secondary sedimentation tank, wherein the AO reactor is divided into an anaerobic zone and an aerobic zone, the sludge chlorination pretreatment reactor is communicated with the aerobic zone through a first sludge return pump, and the secondary sedimentation tank is communicated with the anaerobic zone through a second sludge return pump, wherein the sludge is treated by side anoxic treatment, only part of the residual sludge is subjected to chlorination treatment, and the influence on anaerobic ammonia oxidation bacteria on the biofilm is avoided, so as to ensure the stable operation of the whole system.

The invention belongs to the technical field of biological denitrification, and particularly relates to a core-shell composite material, a preparation method and application thereof, and a treatment method of nitrogen-containing wastewater. The core-shell type composite material provided by the invention is applied to an Anammox process, so that the rapid enrichment of anaerobic ammonia oxidation sludge is realized, and the protection effect on the anaerobic ammonia oxidation sludge is realized by screening adverse factors such as heavy metals and antibiotics in wastewater; under the synergistic effect of the biochar, the transition metal and the molecular sieve, the combined effect of enriching and protecting the AnAOB is realized. The core-shell composite material provided by the invention can promote stable operation of an anaerobic ammonia oxidation process in an actual wastewater treatment process and large-scale engineering application of the process.

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 provides a recycling cooperative treatment system and method for three wastes in large-scale livestock and poultry breeding. The system comprises a pretreatment unit, a grating and a solid-liquid separator, wherein the solid-liquid separator is used for carrying out solid-liquid separation on livestock and poultry manure, and wastewater is coagulated and settled in a primary settling tank; the wastewater recycling unit is used for removing high-concentration organic matters from wastewater in a UASB reactor, purifying and utilizing generated biogas, settling the wastewater in an anaerobic settling tank, then feeding the wastewater into an AO-Anammox tank for denitrification, saving the aeration rate by 62.5%, feeding the wastewater into a final settling tank for dosing and dephosphorization, carrying out ozone oxidation treatment, and discharging most treated water into a municipal pipe network; in the circulating deodorization unit, a small part of treated water flows into a reclaimed water recycling workshop and is pumped into a deodorization room through a recycling water pump to remove breeding waste gas, and the outflowing deodorized water is converged into the anaerobic sedimentation tank to be continuously treated; and manure residues and sludge generated by the solid waste recycling unit and the pretreatment unit and concentrated sludge generated by the biochemical pool are subjected to dehydration treatment, composting and returning to the field.

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.