31 results about "Simultaneous nitrification-denitrification" patented technology

This invention relates to the field of deep nitrogen removal technology, specifically to a method for simultaneous nitrification and denitrification deep nitrogen removal in a multi-stage AO process for wastewater. The method is characterized by using multiple functional tanks connected in series to form a multi-stage AO process wastewater biological treatment system, and constructing an activated sludge model. Specifically, the activated sludge model is constructed by: acquiring process parameters and effluent water quality indicators; constructing a complete measured dataset; defining prediction targets and input features; determining whether there is a significant correlation between the input features and the prediction targets, constructing a set of associated inputs, introducing other input features layer by layer as interference features, calculating the first-order correlation coefficient between the predicted targets and input features after introducing interference features; determining whether there is an interference effect in the correlation between the prediction targets and input features based on the first-order correlation coefficient, and updating the set of associated inputs; and iteratively training the activated sludge model based on fused features, virtual data, and the measured dataset.

This invention provides a biological nitrogen and phosphorus removal system and method for wastewater treatment, relating to the field of wastewater treatment technology. The system includes: an anaerobic zone, a denitrification-anoxic zone, a low dissolved oxygen aeration zone, a solid-liquid separation zone, and an equipment zone, sequentially connected along the wastewater flow direction; the anaerobic zone is connected to an inlet pipe; the solid-liquid separation zone is equipped with a drain pipe; the equipment zone includes stirring equipment and dissolved oxygen supply equipment. Each biological tank in the system operates with a high sludge concentration. The system provided by this invention can enhance the ability of microorganisms in the anaerobic zone to absorb organic matter and release phosphates. It can promote simultaneous nitrification-denitrification and denitrification-phosphorus removal reactions in the denitrification-anoxic tank for nitrogen and phosphorus removal. Simultaneous nitrification-denitrification and polyphosphate accumulation reactions can be carried out in the low dissolved oxygen aeration tank, achieving organic matter removal without the need for additional carbon sources, with low aeration intensity, low operating energy consumption, and good treatment effect.

The application discloses a high-ammonia-nitrogen wastewater simultaneous nitrification and denitrification and chromium remediation method based on a microorganism-promoter combination. 12 The combination is composed of simultaneous nitrification and denitrification bacteria and sodium azide (NaN3), alanine and dodecamolybdenum phosphate (PMo 12 ) and is used for detoxifying dissolved heavy metal chromium and improving denitrification efficiency. The method is to culture SND simultaneous short-cut nitrification and denitrification biological bacteria under aerobic conditions, inoculate the biological bacteria into a high-chromium solution, add biological promoters, promote the growth of microorganisms and the conversion of nitrogen, continuously receive and provide electrons in a reversible oxidation-reduction process, thereby reducing the total activation energy of the reaction and efficiently detoxifying heavy metal chromium. The microorganism-promoter combination technology obtained in this way can not only realize efficient simultaneous nitrification and denitrification in high-ammonia-nitrogen wastewater, but also maintain the biological activity of the SND bacteria in a high-chromium environment, thereby providing reliable technical support for efficient chromium removal and toxicity remediation of high-ammonia-nitrogen wastewater.

The invention discloses split-flow vertical water treatment equipment based on an MABR (Membrane Aerated Baffled Reactor) membrane, which belongs to the technical field of water treatment, adopts a strategy of upper and lower static zoning and fluid split-flow disturbance optimization, and is matched with intermittent and low-intensity fluid pulse and gas pulse to realize mass transfer enhancement and membrane pollution control. Specifically, a reactor is divided into an upper reaction zone and a lower anaerobic zone by using a double-layer flow guide table, a flow distribution structure is additionally arranged in the lower anaerobic zone, sludge slides down from the top of a cylinder wall in a film shape to form a water curtain, sewage is jetted upwards from two sides of the bottom to form efficient countercurrent contact, phosphorus release and partial hydrolytic acidification are carried out, and the sludge is discharged. Treated sewage is conveyed upwards under the drainage effect of the double-layer flow guide table, water flow is evenly distributed upwards through the flow distribution guide mechanism, strong turbulent flow is generated, the hydraulic shear force on a biological membrane on the outer surface of the MABR membrane wire set is improved, stable formation and efficient cooperation of an aerobic zone (near membrane side) and an anoxic zone (far membrane side) are facilitated, and the synchronous nitrification and denitrification efficiency is improved.

The invention belongs to the field of environmental microbiological technology and wastewater biological treatment, and particularly discloses a synchronous nitrification and denitrification acid-eating bacterium and application thereof in wastewater treatment. The strain is Acidovorax sp. LM14, and is preserved in China Center for Type Culture Collection, called CCTCC for short, the preservation address is Wuhan University Life Science College, Wuchang District, Wuhan City, Hubei Province, the preservation date is November 10, 2025, and the preservation number is CCTCC M 20252521. The strain has a heterotrophic nitrification-aerobic denitrification capability, can synchronously and efficiently remove ammonia nitrogen, nitrite nitrogen and nitrate nitrogen under an aerobic condition, and still can efficiently remove wastewater with the ammonia nitrogen concentration of 500mg / L. Meanwhile, the strain can effectively degrade aromatic pollutants such as phenol, and the degradation rate exceeds 90% when the concentration of phenol is as high as 500mg / L. In addition, the LM14 still keeps high denitrification activity under the condition of low carbon nitrogen ratio, and has a wide application range to pH and temperature.

The utility model relates to the technical field of sewage treatment, in particular to a sewage treatment system, which comprises a primary sedimentation tank, a synchronous nitrification and denitrification subsystem and a final-stage sedimentation tank which are sequentially communicated, and is provided with an electrolytic dephosphorization device and a liquid conveying device, and a liquid inlet of the electrolytic dephosphorization device is communicated with the bottom of the final-stage sedimentation tank through the liquid conveying device; a liquid outlet of the primary sedimentation tank is connected into the primary sedimentation tank; when the system runs, low-phosphorus turbid liquid at the bottom of the final-stage sedimentation tank is fed into the electrolytic dephosphorization device through the liquid conveying device, the turbid liquid carries metal ions generated by electrolysis to return to the primary sedimentation tank while washing a polar plate, the metal ions are combined with phosphorus in the primary sedimentation tank to form precipitates to realize dephosphorization, and supernate enters a subsequent treatment unit. Due to the low-phosphorus characteristic of the final-stage precipitation solution, the formation of phosphate in the electrolytic dephosphorization device is avoided, and the sewage treatment system does not need to be additionally provided with a sewage storage tank for storing the precipitate in the final-stage precipitation tank, so that the occupied area of the sewage treatment system is reduced.

The invention relates to the technical field of biological sewage treatment, and discloses a synchronous nitrification and denitrification phosphorus removal treatment device for sewage, which comprises a mainstream SBR (sequencing batch reactor), a side flow SBR is arranged on one side of the mainstream SBR, and a water inlet barrel and a water outlet barrel are arranged on the other side of the mainstream SBR. A solid-liquid separation assembly and a flow division assembly are arranged between the main flow SBR reactor and the side flow SBR reactor, the solid-liquid separation assembly can separate sludge from clear liquid in sewage, when the sewage passes through the filter screen plate, the sludge is intercepted, the supernatant penetrates through meshes, and the supernatant penetrating through the filter screen plate falls back into the main flow SBR reactor from a lower flow opening; the inclination angle of the inclined plate is increased through the inclination increasing assembly, and the filter screen plate is driven to rotate to block the downward flowing opening, so that the intercepted sludge flows down along the inclined surface to enter the side flow SBR reactor under the increasing of the inclination angle of the inclined plate and the action of gravity, and thorough separation of the sludge and the supernate is realized.

The invention discloses a refractory sewage treatment process based on EBIS and improved BAF coupling, and relates to the technical field of sewage treatment, EBIS effluent enters an intermediate sedimentation tank for solid-liquid separation, part of precipitated sludge flows back to an inlet of an EBIS reactor to maintain high biological concentration, and residual sludge is discharged; the method comprises the following steps of: feeding a supernatant into an improved BAF (Biological Aerated Filter), filling the improved BAF with a porous modified composite filter material, and forming a stable biological membrane activated carbon composite functional layer on the surface of the filter material by adopting a pulse intermittent aeration and air-water backwashing linkage mode so as to perform deep adsorption and synchronous nitrification and denitrification biomineralization on intermediate metabolites in EBIS effluent. Through efficient coupling of the EBIS and the improved BAF, stage treatment and deep purification of the refractory industrial wastewater are realized, and the problems of low treatment efficiency, poor stability and high energy consumption of a single process and a traditional coupling process are effectively solved.

The invention relates to a domestic waste incineration plant leachate treatment system and a use method thereof, and relates to the technical field of sewage and wastewater treatment.The domestic waste incineration plant leachate treatment system mainly comprises a pretreatment system, an anaerobic system, an MABR biochemical system, a deep treatment system and an auxiliary system which are sequentially arranged, the auxiliary system comprises a sludge system, a heat exchange system, a dosing system and an odor collection system. The pretreatment system is used for removing most suspended matters, the heating system is used for preserving heat, the UASB reactor is used for performing anaerobic digestion and efficiently degrading organic matters, the MABR biochemical system is used for synchronously performing nitrification and denitrification for nitrogen removal, the heat exchange system is used for controlling the water temperature of the MABR biochemical system to be stable, the tubular ultrafiltration system is used for realizing separation of sludge age and hydraulic retention time, and the MABR biochemical system is high in microbial diversity and low in sludge yield; further pollutant removal is carried out through deep treatment, and finally, stable effluent quality is ensured. The device can realize full-quantitative treatment of the leachate of the household garbage incineration plant, and has the advantages of small occupied area, low carbon emission, low operation cost and the like.

The application discloses a novel combined suspended ball filler for simultaneous nitrogen and phosphorus removal in a biochemical aerobic section, which is filled into a porous suspended ball by a mixed material composed of a composite sulfur component filler and a porous sponge. The novel combined suspended ball filler can be used in the biochemical aerobic section, can enrich the microbial biofilm on one hand, and can successfully remove nitrate nitrogen by increasing the composite sulfur component filler on the other hand, so that simultaneous nitrification and denitrification is achieved, nitrate nitrogen and ammonia nitrogen are removed at the same time, the nitrogen and phosphorus removal effect is improved, and the proportion of the composite sulfur component filler and the porous sponge can be flexibly adjusted according to different water quality conditions, so that efficient nitrogen and phosphorus removal can be realized in different wastewaters.

The application discloses a low-carbon and high-efficiency seawater breeding wastewater treatment device and method, wherein the device comprises a sequencing batch reactor and a modified hollow fiber membrane assembly arranged in the sequencing batch reactor, and is provided with a stirring, constant temperature, monitoring and aeration control unit. The method strengthens the microbial biofilm by the modified membrane assembly, adopts a salinity and antibiotic gradient domestication strategy, constructs a stable simultaneous nitrification and denitrification (SND) process under a low dissolved oxygen (DO<0.2 mg / L) condition, and realizes efficient and collaborative removal of carbon, nitrogen pollutants and antibiotics. The application significantly improves the stability of the system against salinity and antibiotic impact, reduces the aeration energy consumption, effectively solves the problem that the microbial activity is inhibited when the traditional biological process is used to treat high-salinity and antibiotic-containing seawater breeding wastewater, and provides a reliable technical scheme for low-carbon and high-efficiency treatment of seawater breeding wastewater.

The invention relates to the technical field of sewage and wastewater and sludge treatment, and discloses an upgrading expansion system and method for a sewage and wastewater treatment plant, and the upgrading expansion system comprises a grit chamber, an anaerobic tank, an anoxic tank, an aerobic tank, a secondary sedimentation tank and an efficient sedimentation tank which are sequentially connected according to the water flow direction, the activated sludge quality-divided optimization treatment unit is connected between the secondary sedimentation tank and the anaerobic tank; an MABR module is arranged in the anoxic tank, and the MABR module performs synchronous nitrification-denitrification; the activated sludge quality-divided optimization treatment unit comprises first-stage treatment, second-stage treatment and third-stage treatment, impurity fibers in activated sludge are removed in a physical mode in the first-stage treatment, sand is removed through cyclone separation in the second-stage treatment, and separated sludge liquid with high sand content is discharged into an efficient sedimentation tank; and in the third-stage treatment, centrifugal sludge densification treatment is carried out to obtain dense sludge, and the dense sludge flows back to the anaerobic tank to realize enrichment. According to the invention, quality and efficiency improvement and maximum 50% in-situ capacity expansion of the sewage and wastewater treatment plant are realized.

The present application relates to a kind of enhanced denitrification and phosphorus removal sewage treatment device, including the anaerobic pool, anoxic pool, first composite biochemical pool and second composite biochemical pool connected in sequence, first composite biochemical pool is equipped with several composite biological carrier components, and is equipped with first aeration pipe;Second composite biochemical pool is equipped with several MABR membrane components;Anaerobic pool is equipped with first exhaust pipe, and the gas outlet end of first exhaust pipe is equipped with several first branch pipe;Anoxic pool is equipped with second exhaust pipe, and the gas outlet end of second exhaust pipe is equipped with several second branch pipe, and first branch pipe and second branch pipe are connected first aeration pipe and several MABR membrane components respectively;Composite biological carrier component surface load aerobic microorganism, and the membrane filament surface of MABR membrane component is loaded aerobic microorganism, anoxic microorganism and anaerobic microorganism from inside to outside, realizes simultaneous nitrification and denitrification.

The application discloses a refractory wastewater treatment process based on coupling of EBIS and improved BAF, relates to the technical field of wastewater treatment, and discloses the following technical scheme: EBIS effluent is introduced into an intermediate sedimentation tank for solid-liquid separation, part of the sludge is backflowed to the inlet of the EBIS reactor to maintain high biological concentration, and the remaining sludge is discharged; the supernatant is introduced into an improved BAF tank by gravity, the improved BAF tank is filled with porous modified composite filter material, and a pulse intermittent aeration and air-water backwashing linkage mode is adopted to form a stable biological membrane activated carbon composite functional layer on the surface of the filter material, so that the intermediate metabolites in the EBIS effluent are subjected to deep adsorption and simultaneous nitrification and denitrification biological mineralization. Through the efficient coupling of EBIS and improved BAF, the application realizes the staged treatment and deep purification of refractory industrial wastewater, and effectively solves the problems of low treatment efficiency, poor stability and high energy consumption of single process and traditional coupling process.

The application discloses a sewage treatment device and method based on membrane filament oxygen supply and electrode synergistic effect of iron redox conversion, the device comprises a reactor, an electrode unit, an oxygen supply membrane unit, an iron base unit, a separation unit and a gas supply system. The oxygen supply membrane and the iron base unit are alternately arranged at a micro distance of 0.5-5 mm to form an iron-oxygen alternating interface; the electrode unit and the oxygen supply membrane unit are separated by the separation unit to form redox subareas. The application utilizes the migration and conversion of iron ions between aerobic and anaerobic zones to construct a non-contact electron transfer path, realizes simultaneous nitrification, denitrification and chemical phosphorus removal; the micro distance iron-oxygen interface can limit the initiation of efficient electro-Fenton reaction to produce hydroxyl radicals and strengthen the degradation of difficult-to-degrade organic matters such as pyrethroid. The application integrates biological denitrification, chemical phosphorus removal, advanced oxidation and biological electricity generation functions, has the advantages of high treatment efficiency, low energy consumption, stable operation and the like, and is especially suitable for treating industrial wastewater containing difficult-to-degrade organic matters.

The invention belongs to the technical field of water treatment, and particularly relates to a low-carbon denitrification method for purifying and repairing an aquaculture water body. According to the method disclosed by the invention, a biological nitrogen removal system taking synchronous nitrification and denitrification as a core is constructed by directionally cultivating indigenous nitrogen removal flora in a water body and combining a special slow-release carbon source and a nitrogen removal catalyst, so that the conversion efficiency of harmful nitrogen forms such as ammonia nitrogen and nitrite into gaseous nitrogen is effectively improved; therefore, in-situ purification and resource utilization of nitrogen pollution are achieved in the breeding process. An ion balance environment beneficial to symbiosis of beneficial microorganisms and algae is constructed, so that cultured organisms are in a continuous and healthy growth environment, the disease occurrence rate is remarkably reduced, a green production mode that antibiotics, disinfectants and insecticides are rarely used in the whole culture process is achieved, and meanwhile the quality and safety of aquatic products are guaranteed. According to the method, a closed-loop culture mode of simultaneously culturing, purifying and repairing is realized, and the non-point source pollution pressure of aquaculture on the environment is effectively relieved.

The application relates to a magnetic synchronous nitrification and denitrification carrier and a preparation method thereof. The carrier comprises a core body comprising an inner core and a magnetic powder film; the inner core is formed of HDPE, and the magnetic powder film is formed of magnetic powder adhered to the surface layer of the inner core; and a fiber film is wrapped on the surface of the core body. The preparation method comprises the following steps: melting HDPE into a sheet shape under the condition of 150-200 DEG C; adding pure water into the magnetic powder to mix, the ratio of the magnetic powder to the water is 20:1-2000:1, and a mixture of the magnetic powder and the water is obtained; placing the melted sheet-shaped HDPE into the mixture, heating to 180 DEG C, maintaining for 2-5 minutes, and then cooling and taking out to obtain the core body; winding the fiber film on the core body; and placing the wound core body in a magnetic field environment with a magnetic field intensity of more than 1T, applying vibration at the same time, and staying for more than 10 seconds to complete the preparation of the carrier. The application can effectively form nitrification and denitrification regions on the surface of the carrier by wrapping a layer of fiber film on the surface of the core body, so that the carbon source in the water body is effectively utilized to realize synchronous nitrification and denitrification denitrification.

This invention discloses a method for treating aquaculture wastewater, belonging to the field of wastewater treatment. The method includes the following steps: (1) the aquaculture wastewater passes through a pretreatment unit to remove large particulate suspended solids and some organic matter; (2) it enters a modified MBBR reactor for biological treatment. This reactor adopts a composite packing system of layered porous suspended packing and shell packing to achieve efficient nitrification and simultaneous nitrification and denitrification under aerobic conditions; (3) the effluent enters an anaerobic ammonia oxidation reactor, and deep denitrification is achieved through a short-cut nitrification-anaerobic ammonia oxidation coupling process; (4) finally, the effluent undergoes sludge-water separation and deep purification through an MBR membrane separation unit to obtain compliant effluent. This invention achieves efficient treatment of aquaculture wastewater through process innovation and packing optimization. The removal rates of COD, ammonia nitrogen, total nitrogen, and total phosphorus reach more than 95%, more than 97%, more than 90%, and more than 85%, respectively. The effluent quality is stable and meets the standards. It has the advantages of high treatment efficiency, stable operation, and strong resistance to shock loads.

The invention discloses equipment and method for treating high-concentration organic wastewater through an MABR membrane combined with an MNB. The equipment comprises a water inlet, the outer wall of the right side of the water inlet is fixedly connected with a sedimentation tank, the interior of the sedimentation tank is fixedly connected with a connecting pipe, the outer wall of the connecting pipe is fixedly connected with an anaerobic tank, and the outer wall of the anaerobic tank is fixedly connected with an anoxic tank; a reaction tank is fixedly connected to the outer wall of the anoxic tank, a stirring tank is fixedly connected to the outer wall of the reaction tank, a driving mechanism is arranged in the stirring tank, a biological adsorption tank is fixedly connected to the outer wall of the stirring tank, and the outer walls of the lower sides of the sedimentation tank, the anaerobic tank, the anoxic tank and the reaction tank are fixedly connected to the interior of a sludge discharge plate; and micro / nano bubble-ultrasonic synergistic pretreatment is introduced between the sedimentation tank and the anaerobic tank, so that the biodegradability of the wastewater is improved and the toxicity is reduced under the actions of high-specific-surface-area bubbles, self-dissolving oxygenation and cavitation chain scission. The MABR membrane in the reaction tank forms an aerobic-anoxic-anaerobic gradient microenvironment in a bubble-free diffusion manner, so that efficient and synchronous nitrification and denitrification are realized.

This invention relates to a method for enhancing the nitrogen removal performance of a powder carrier process based on intermittent aeration. The method is implemented using a powder carrier system, which includes an influent subsystem (1), a main reactor (2), an effluent subsystem (3), and a carrier recovery subsystem (4). After actual wastewater enters the system, powder carriers with a particle size of 20–200 micrometers are added to the main reactor. The powder carrier process is operated using an anaerobic stirring + intermittent aeration stirring mode (aeration / stop time = 0.5–0.75). Compared with existing technologies, this invention, through the addition of powder carriers and intermittent aeration, stably cultivates microparticle sludge, increases microbial biomass, and effectively enhances the ammonia oxidation rate and denitrification rate. It also directionally enriches ammonia-oxidizing bacteria and denitrifying bacteria, realizing short-cut nitrification and denitrification processes as well as simultaneous nitrification and denitrification, thus enhancing the wastewater nitrogen removal performance of the powder carrier process and having broad application prospects.

The present application relates to sewage treatment technical field, and disclose intelligent BAF simultaneous nitrification and denitrification phosphorus recovery sewage treatment system and method, the system includes sewage quality parameter processing module, process operation optimization analysis module, resource recovery execution module.The method comprises: collecting sewage influent data and BAF reactor operation data;Carrying out carbon-nitrogen-phosphorus ratio analysis and process state monitoring, judging the feasibility of simultaneous nitrification and denitrification;When the condition is not satisfied, carbon source supplement and dissolved oxygen control are carried out;Optimize the process parameters of hydraulic retention time, filler layer height and reflux ratio;Match chemical precipitation, crystallization and adsorption method as target phosphorus recovery process;Drive dosing, aeration and sludge discharge unit to execute treatment and output purified water and phosphorus recovery product.The present application improves the denitrification efficiency and system stability, improves the phosphorus recovery efficiency and product quality, and ensures the improvement of overall treatment effect and resource recovery rate.

This invention provides a microbial fiber matrix purifier that integrates a bag-type fiber biological filtration matrix with a simultaneous nitrification and denitrification mechanism, offering the triple advantages of simplified structure, high-efficiency decontamination, and resource recycling. It utilizes modified plastic fiber bags to simultaneously complete physical filtration, biological reaction, and microbial membrane treatment, completely replacing vertical flow sedimentation tanks, microfilters, protein separators, and biological fluidized beds, thus reducing equipment investment. The bottom backflushing design of the central inlet pipe fluidizes the waste within the bag, and combined with targeted control through microbial-carbon coupling, it decomposes large organic molecules into bioflocs that can be ingested by fish, resulting in a high resource utilization rate of uneaten feed and feces. Simultaneously, it eliminates high-energy-consuming equipment, reducing system energy consumption. It can operate independently in land-based factory aquaculture to achieve a "zero-emission" carbon sequestration fishery model, or serve as a pre-treatment unit for existing RAS systems or a deep treatment module in wastewater treatment plants, significantly reducing the load on subsequent ecological ponds and promoting the reuse of aquaculture wastewater that meets standards.

The invention discloses a high-efficiency denitrification heterotrophic nitrification-aerobic denitrification bacterium and denitrification application thereof, and relates to the technical field of microbial denitrification. The strain is Achromobacter insolitus H5-1, the preservation number of the Achromobacter insolitus H5-1 is CGMCC (China General Microbiological Culture Collection Center) No.36087, and the 16S rRNA (Ribose Nucleic Acid) gene sequence of the Achromobacter insolitus H5-1 is shown as SEQ ID NO.1 in a sequence table. The strain can be used for synchronous nitrification and denitrification under the aerobic condition, ammonia nitrogen, nitrate nitrogen and nitrite nitrogen can be efficiently degraded, the degradation rate of the ammonia nitrogen within 24 hours reaches 99% or above, the degradation rate of the nitrate nitrogen reaches 85% or above, and nitrite nitrogen accumulation is avoided. The optimal culture conditions are as follows: the carbon source is selected from sodium pyruvate or sodium succinate, the C / N ratio is 15, the pH value is 7.0-8.0, the temperature is 25-35 DEG C, and the rotating speed is 140-180 rpm. The strain can be used for aquaculture tail water, fishery water quality regulation and control and nitrogen-containing sewage treatment.

The invention provides a solid-liquid separation and chemical precipitation compound system for treating high-concentration pig farm wastewater, which belongs to the technical field of wastewater treatment and sequentially comprises a buffer tank, a solid-liquid separator, a regulating tank, a primary coagulating tank, a primary air floatation tank, an SND biochemical tank, a biochemical clarification tank, a secondary coagulating tank, a secondary air floatation tank and a clean water tank which are connected through pipelines. Wherein the dissolved oxygen in the SND biochemical pool is controlled to be 0.2-0.25 mg / L, and the hydraulic retention time is 5.2 days, so that efficient synchronous nitrification and denitrification are realized. Sludge in the biochemical clarification tank flows back to the SND biochemical tank. By combining physicochemical pretreatment, SND biochemical treatment and physicochemical advanced treatment and optimizing the structure and operation parameters of each unit, the system has the advantages of strong impact load resistance, high nitrogen and phosphorus removal efficiency, stable operation and compact occupied area especially for pig farm wastewater with insufficient carbon source and high nitrogen and phosphorus concentration.

The invention discloses a device and method for rapidly culturing aerobic granular sludge based on an MABR bypass, and relates to the related field of biological sewage treatment.The device comprises a treatment shell, a sewage inlet is formed in the outer side of the upper end of the treatment shell, an MABR reactor is installed in the treatment shell, the top end of the treatment shell is connected with a vertical pipe in the vertical direction, and the vertical pipe is connected with a water inlet; the bottom of the reaction acceleration mechanism is linked with a mixing mechanism, the mixing mechanism acts on a mixed solution containing fallen biological membrane fragments, and the execution end of the reaction acceleration mechanism acts on the outer side of the conveying pipe. According to the device and the method for rapidly culturing the aerobic granular sludge based on the MABR bypass, a layered biological membrane with the thickness of 200-500 microns is rapidly cultured through the MABR, so that the culture period is greatly shortened. Meanwhile, the accelerated reaction mechanism in the device drives the conveying pipe to scour at multiple angles, the mixing mechanism ensures that mixed liquid is uniform, the strong flow mechanism improves the water and gas conveying efficiency, finally, granular sludge which is excellent in settling performance and stable in structure and has synchronous nitrification and denitrification capacity is formed, and operation is easy and convenient.

The invention discloses a device and a method for realizing synchronous nitrification and denitrification based on time and space control, a sequencing batch reactor in the device is internally provided with a stirring paddle and an aeration ring, the stirring paddle is provided with a plurality of stirring blades, the form of the stirring blades is set according to space flow state control requirements, and then different sludge concentration partitions are controlled to be formed; the aeration ring is arranged in the middle of the reactor and is connected with an air compressor through an air supply pipe, and a gas flow meter is arranged on the air supply pipe; a bottom interface of the sequencing batch reactor is sequentially connected with a peristaltic pump and a sewage tank through a pipeline; the reactor is further provided with a DO sensor and a pH sensor which are used for detecting the dissolved oxygen content and the pH value in real time; the process controller is electrically connected with the DO sensor, the pH sensor and the gas flow meter respectively, and synchronous nitrification and denitrification in the system are realized through integrated time sequence and spatial distribution coordinated regulation, so that the purposes of effectively improving the sewage treatment efficiency and deeply removing nitrogen and phosphorus are achieved.

The application discloses a method for promoting aerobic sludge granulation by combining coagulation sedimentation and a double-zone sedimentation tank, and relates to the technical field of wastewater treatment, which comprises the following steps: sewage is sequentially introduced into a coagulation sedimentation tank and a biochemical tank; effluent from the biochemical tank is introduced into a double-zone sedimentation tank; heavy sludge in the double-zone sedimentation tank is sent back to the biochemical tank; light sludge in the double-zone sedimentation tank is directly discharged; effluent in the double-zone sedimentation tank is discharged after reaching the standard; and the method is beneficial to improving sludge-water separation efficiency by combining the characteristics and defects of the coagulation tank sedimentation process with the advantages of the double-zone sedimentation tank, and is beneficial to strengthening biological denitrification and phosphorus removal by using mechanisms such as simultaneous nitrification and denitrification and biological mineralization.

The invention belongs to the technical field of sewage treatment, and discloses a sewage treatment method based on a silicon-based supported phenol oxidase catalyst. The method comprises the following steps: firstly, preparing a silicon-based supported phenol oxidase catalyst, carrying out acid pickling and 3-azidopropyltrimethoxysilane modification on a nano flaky silicon dioxide carrier, carrying out a click chemical reaction on the nano flaky silicon dioxide carrier and alkyne ortho-dithiopyridine, introducing an ortho-dithiopyridine group on the surface of the carrier, and further covalently immobilizing phenol oxidase through a disulfide bond, so as to obtain the silicon-based supported phenol oxidase catalyst. The catalyst with high stability and high loading capacity is prepared. When the catalyst is used for treating phenol-ammonia wastewater, the wastewater is firstly subjected to oil removal, deacidification and ammonia distillation pretreatment; then catalyzing phenolic substances in the wastewater to be subjected to oxidative polycondensation by utilizing a catalyst under a weak acid condition, so as to form easily separated polyphenol flocculent substances; after precipitation separation, carrying out deep catalytic polycondensation on supernate through an electrochemical reactor; and finally, biochemical treatment is performed through a synchronous nitrification and denitrification process, so that up-to-standard discharge of the wastewater is realized.