56results about How to "Improve nitrogen removal efficiency" patented technology

The invention belongs to the field of wastewater treatment. The invention provides a manganese-carbon composite controlled-release material as well as a preparation method and application thereof. The manganese-carbon composite controlled-release material comprises the following components: a manganese-rich mineral, a natural plant carbon source, a cementing material, aggregate, an additive and a foaming agent. The manganese-carbon composite controlled-release material disclosed by the invention can regulate and control the carbon release and manganese circulation process by virtue of the interaction between manganese and carbon, so that the electron transfer and mass transfer efficiency is remarkably improved, synergistic denitrification is realized, the overall denitrification efficiency is remarkably improved, and synchronous nitrogen and phosphorus removal and self-adaptive continuous denitrification are realized. The raw materials required for preparing the manganese-carbon composite controlled-release material are environment-friendly and low in price, the preparation process is simple, the preparation cost is low, and the manganese-carbon composite controlled-release material can be applied to filler in a submerged area of an artificial wetland, a biological filter and a biological retention system, and can be widely applied to application scenes such as tail water advanced treatment of a sewage treatment plant, rural agricultural sewage treatment and initial rainwater purification.

The invention discloses an iron-loaded biomass charcoal reinforced PN-Anammox integrated nitrogen removal method and a preparation method thereof. The preparation method comprises the following steps: firstly, selecting a proper biomass material, drying the biomass material, soaking the biomass material in an iron salt solution, and performing post-treatment to obtain biomass charcoal particles Fe / BC loaded with micro-nano iron; then inoculating the Fe / BC and anaerobic ammonia oxidation sludge into an anaerobic reactor for culturing, and regulating and controlling process parameters to form Fe / BC-Anammox composite anaerobic sludge particles; and then inoculating into a reactor containing domesticated and matured short-cut nitrification sludge, regulating and controlling reaction conditions to construct an integrated denitrification system, monitoring the effect, and enabling the denitrification system to stably operate within a certain dissolved oxygen fluctuation range. The method has a wide prospect in the field of ammonia nitrogen wastewater treatment, and a new method is provided for solving the problem of poor stability of related PN-Anammox integrated denitrification.

The present invention proposes a MABR membrane assembly, a MABR reactor, a MABR reactor operation method and a MABR biofilm optimization control method, which adopts a cross-flow working mode between horizontal membrane filaments and water flow to improve the mass transfer efficiency of the matrix and metabolites in the MABR biofilm; the composite structure membrane assembly is used to promote the complementarity and symbiosis of various microorganisms such as carbon removal aerobic bacteria, nitrifying bacteria, denitrifying bacteria and anaerobic ammonia oxidizing bacteria; different areas such as MABR membrane reaction area, pre-reaction area and water distribution and gas distribution area are constructed in the same reactor to complete short-range nitrification or partial short-range nitrification reaction, short-range denitrification reaction and anaerobic ammonia oxidation reaction respectively, so as to achieve efficient biological denitrification of sewage with low carbon-nitrogen ratio in a single-stage MABR reactor. At the same time, the optimization control method of the MABR biofilm solves the problems that the overly thick biofilm in the MABR reactor is not easy to be effectively washed, and the fixed gas washing frequency and intensity are difficult to simultaneously adapt to the biofilm washing and film removal requirements of membrane filaments in different parts.

The invention relates to the technical field of aluminum sulfate, in particular to a method for preparing aluminum sulfate. According to the method, the process of leaching the aluminum element from the aluminum ash and removing impurities in the prior art is optimized, the leaching rate of the aluminum element in the aluminum ash is greatly increased by two steps of alkaline leaching and ultrasonic-assisted alkaline leaching in the alkaline leaching process, the reaction conditions are mild, high temperature and high pressure are not needed, the nitrogen removal efficiency is high, meanwhile, the aluminum loss in the aluminum leaching process is reduced, and the method is suitable for industrial production. The organic complexing impurities are precipitated, and the precipitate generated by the complexing impurities is adsorbed by using the hydrogel as a carrier, so that the difficulty of impurity removal, precipitation and filtration is reduced, and the prepared aluminum sulfate is high in purity.

The invention relates to the technical field of sewage treatment, and provides a high-concentration ammonia nitrogen rural domestic sewage treatment system, which comprises an adjusting tank, a sewage basic treatment device, a sewage enhanced treatment device, an aeration device and a bacteria inactivation device, the sewage basic treatment device comprises an anaerobic tank, an anoxic tank, an aerobic tank and a sedimentation tank which are sequentially communicated, a first sludge return pipe is communicated between the anaerobic tank and the sedimentation tank, and a second sludge return pipe is communicated between the aerobic tank and the anoxic tank; the sewage enhanced treatment equipment is communicated between the sewage basic treatment equipment and the adjusting tank, the sewage enhanced treatment equipment comprises a biochemical tank, and an aerobic tank and an anoxic tank which are arranged in the biochemical tank, and the aerobic tank and the anoxic tank are communicated with each other; the aeration equipment is used for aerating the anoxic tank, the aerobic tank, the anoxic tank and the aerobic tank; the bacteria inactivation equipment is used for inactivating nitrifying bacteria in the second sludge return pipe. According to the invention, ammonia nitrogen in sewage can be efficiently removed, and the denitrification efficiency is improved.

The invention discloses a decentralized discharge source sewage collection-A2O treatment linkage system and a treatment method. The linkage system comprises a sewage pretreatment and pipe network collection system, an A2O treatment system and a discharge system. By adopting a negative pressure collection technology, the sewage collection problem caused by complex terrain in a sewage collection range is solved, and the sewage collection efficiency is improved; the gas stripping technology, the Venturi technology and the siphon technology are creatively applied to the sewage process, and sewage collection and sewage lifting, muddy water backflow and oxygenation in the A2O process can be achieved only through one self-priming pump; the Venturi jet device directly performs jet aeration on the aerobic tower, so that the dependence on a high-energy-consumption mechanical aeration fan is reduced, and resource waste and material loss are avoided; meanwhile, distribution of water flow and dissolved oxygen in the reaction tank is optimized, natural circulation is formed through the density difference between the aerobic tower and the anoxic tower, additional power is not needed, the energy consumption is reduced, meanwhile, the nitrogen and phosphorus removal process is promoted, and the treatment efficiency is remarkably improved.

The invention provides a method for rapidly recovering denitrification efficiency of an anaerobic ammonium oxidation system, and aims to solve the problem of insufficient activity of anaerobic ammonium oxidation bacteria in a limited reactor. The lateral flow high-activity anaerobic ammonium oxidation bacteria are introduced, 5-6 mg / L of Fe < 3 + > is added into the inlet water, and meanwhile, the hydraulic retention time is adjusted, so that the adaptability and denitrification rate of the anaerobic ammonium oxidation bacteria are remarkably improved. Experiments show that the method increases the denitrification rate from 40mg N / L / d to 160mg N / L / d, and the amplification reaches 300%. Besides, hollow plastic small balls with the diameter of 16mm are laid in the reactor, so that a strict anaerobic environment is ensured, and the activity recovery of anaerobic ammonium oxidation bacteria is facilitated. The Fe < 3 + > optimizes the growth environment of microorganisms, enhances the flora stability and the denitrification efficiency, inhibits the competition of harmful microorganisms, and is simple to operate and environment-friendly. The overall efficiency of the sewage treatment system is greatly improved, the energy consumption and the sludge yield are reduced, the denitrification cost is reduced, and the system is suitable for various sewage treatment scenes with efficient denitrification requirements.

The invention discloses a sewage plant tail water treatment system and method, and relates to the technical field of sewage treatment.The sewage plant tail water treatment system is applied to tail water generated by a sewage plant adopting an ozone advanced oxidation technology, and the treatment system comprises an activated carbon reaction device, a denitrification reaction device, an ecological pond and a horizontal subsurface flow wetland; the activated carbon reaction device is communicated with the tail water pipe and comprises an activated carbon filtering layer, and the activated carbon filtering layer is used for adsorbing chemical oxygen demand and dissolved oxygen in tail water; the denitrification reaction device is communicated with the activated carbon reaction device and comprises a denitrification filter material layer, and the denitrification filter material layer is used for autotrophic denitrification nitrogen removal of tail water; the ecological pond is communicated with the denitrification reaction device and comprises aquatic plants and aquatic animals; the horizontal subsurface flow wetland is communicated with the ecological pond and is used for deeply filtering the tail water. The treatment system can improve the purification effect of the tail water of the sewage plant.

The present invention relates to the technical field of sewage treatment materials, and specifically to a porous composite filler and application thereof for efficiently removing total nitrogen from domestic sewage; the porous composite filler is a porous zeolite / nanocarbon ball composite filler, and the porous zeolite / nanocarbon ball composite filler comprises a porous zeolite and a single-porous hollow nanocarbon ball loaded on the pore surface of the porous zeolite; the mass ratio of the porous zeolite and the single-porous hollow nanocarbon ball is (95.0~98.0):(2.0~5.0). The single-porous hollow nanocarbon ball of the present invention has a unique single-porous hollow structure, which is combined with the columnar pore adsorption and diffusion capacity of the porous zeolite to achieve efficient removal of total nitrogen. The composite filler has excellent adsorption performance and structural stability, is suitable for the removal of total nitrogen in municipal sewage treatment, industrial wastewater treatment and artificial wetland systems, achieves the performance of efficient removal of total nitrogen from domestic sewage, solves the problem of low adsorption efficiency, and has a wide range of application value.

The application provides a method and device for treating wastewater by combining a suspended filler floating bed and a soil infiltration system, and the method comprises the following steps: S1, breeding wastewater is treated by the suspended filler floating bed after passing through a hydrolysis tank, and effluent is treated in a sedimentation tank, and wastewater of the suspended filler floating bed is returned to the suspended filler floating bed for secondary treatment; S2, wastewater of the sedimentation tank is returned to the hydrolysis tank; and S3, effluent of the sedimentation tank is introduced into a soil underground infiltration system. The system provided by the application is beneficial to further strengthening the effects of denitrification, phosphorus removal and removal of suspended solids, and solves the problems of low dissolved oxygen content of influent and wastewater in the system, which is not conducive to the growth of nitrifying bacteria, and low effective volume utilization rate. In the use process, the filler does not need to be replaced, and mechanical aeration equipment does not need to be added, and the system has the advantages of low investment cost, no need to add chemical agents for treatment, obvious effect, not easy to breed mosquitoes, simple operation and management, and beautification of the environment, and has remarkable ecological and economic benefits for promoting deep purification of breeding wastewater.

The invention relates to the technical field of sewage treatment, and aims to solve the problems that a dissolved oxygen detector is limited in measuring range, an air inlet fan and an air inlet valve in a low-dissolved-oxygen area cannot be guided to act according to dissolved oxygen indexes, an efficient denitrification state cannot be maintained, a dephosphorization agent is added according to effluent total phosphorus, a dephosphorization agent adding point is the tail end of an aerobic II area, the feedback time is long, and the efficiency is high. The invention provides an optimized oxygen dissolving and dosing regulation and control method suitable for an A2O + MBR (Membrane Bioreactor) process, aiming at solving the problems of unstable total phosphorus in effluent caused by low control efficiency in the prior art. The method comprises the steps of data acquisition, medicament adding control and dissolved oxygen control. According to the invention, the opening degree of the fan and the joint action of the valves in the areas to be controlled are controlled through the oxidation-reduction potential, the linkage automatic control of the oxidation-reduction potential of the biochemical pool and the dissolved oxygen in the low dissolved oxygen area and the aerobic area is completed, the actions of the fan and the valves of the aeration system are effectively guided, and the efficient denitrification state can be maintained; the orthophosphate value at the tail end of the aerobic zone is used as the adding basis of the dephosphorization agent, so that the method is more accurate and efficient.

This application relates to the field of carbon source materials, and in particular to a composite carbon source for enhancing the denitrification capacity of activated sludge, its preparation method, and its application. The composite carbon source for enhancing the denitrification capacity of activated sludge, by weight, comprises: 45-60 parts of fast-acting carbon source, 10-15 parts of long-acting carbon source, 9-16 parts of synergist, 0.2-0.5 parts of activator, 4-8 parts of composite functional agent, and 20-25 parts of deionized water. This composite carbon source effectively promotes the denitrification start-up speed, provides a stable and continuous carbon source supply, effectively avoids the defects of traditional carbon sources such as excessive supply in the early stage and insufficient supply in the later stage, and ensures efficient operation of the entire denitrification process. It is safe and convenient to use, non-toxic, and poses no risk of combustion or explosion. Storage and addition are simple, significantly reducing on-site operational safety risks. The carbon release process is stable and controllable, and multiple slow-release mechanisms enable flexible regulation of the carbon source release rate to match the denitrification requirements under different operating conditions.

A method for realizing short-cut nitrification denitrification by using a cefalexin inhibitor belongs to the field of biological sewage treatment, is used for urban sewage treatment, and comprises the following steps: in a stably operated aerobic sequencing batch reactor, keeping the pH value at 7.4-8.0, the sludge concentration at 3200ml / L, the dissolved oxygen controlled at 1.5 mg / L-2. 7mg / L and the temperature at room temperature in the aerobic sequencing batch reactor; 5 mg / L-15 mg / L of cefalexin is added into the aerobic sequencing batch reactor every day, and short-cut nitrification can be achieved after the operation period is 8 days. According to the method, cefalexin can be added into the aerobic sequencing batch reactor, harsh environmental conditions are not needed, operation is simple, the requirement for the inlet water ammonia nitrogen concentration in the aerobic sequencing batch reactor is not too high, the efficiency of taking out the ammonia nitrogen in the urban domestic sewage is improved, and the economic benefit is increased. And short-cut nitrification in the aerobic sequencing batch reactor can be rapidly realized and stably maintained.

The application provides a method for treating municipal domestic sewage by using micro-nano bubble reinforced aerobic granular sludge, inoculates aerobic granular sludge which can simultaneously accumulate nitrous nitrogen and remove pollutants into a sequencing batch reactor, introduces municipal domestic sewage, carries out micro-nano bubble aeration, and operates the reactor in an anaerobic / aerobic / anoxic mode; the micro-nano bubble aeration controls the dissolved oxygen concentration at 2-3 mg / L, so that the self-enrichment and stable operation of anaerobic ammonia oxidation bacteria in the aerobic granular sludge are realized. The method utilizes the high oxygen mass transfer efficiency and long residence time of the micro-nano bubble, strengthens the pollutant conversion process in the system, and ensures a suitable anaerobic microenvironment for the anaerobic ammonia oxidation bacteria in the aerobic granular sludge; under the condition of treating municipal domestic sewage, the average concentrations of COD and ammonia nitrogen in the effluent are as low as 34.65 mg / L and 1.92 mg / L respectively, and the total nitrogen removal rate reaches 82.53%.

The invention relates to the technical field of water treatment, in particular to an integrated denitrification device for concentrated salt wastewater, which is mainly used for treating inorganic nitrogen and ammonia nitrogen in wastewater. The device is divided into an upper layer part and a lower layer part, the upper layer part comprises a coagulation grid, a flocculation grid, a first sedimentation grid and a second sedimentation grid, and the lower layer part is an SBR reaction tank. By adding the coagulant and the flocculant, suspended matters and colloidal substances can be effectively removed from the upper layer part, and good conditions are provided for subsequent denitrification. And the SBR reaction tank at the lower layer has efficient denitrification performance. The device is provided with an automatic control system, operation parameters can be adjusted according to actual requirements, and stable effluent quality is guaranteed. The device is compact in structure, simple and convenient to operate, small in occupied area, low in energy consumption and capable of reducing construction cost and operation cost. And remote management and monitoring can be realized through the remote monitoring system. When the tail water reaches a certain amount, the alarm is triggered automatically, the tail water is prevented from overflowing, and the treatment efficiency is improved.

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 utility model discloses a multi-source organic waste synergistic conversion sewage treatment composite carbon source system. The system comprises a kitchen waste pretreatment device, a waste pulp pretreatment device, an alcohol by-product pretreatment device, a polysaccharide by-product pretreatment device, a stirring sterilization treatment device and a collection and storage device. The kitchen waste pretreatment device, the waste pulp pretreatment device, the alcohol by-product pretreatment device and the polysaccharide by-product pretreatment device are respectively matched with the stirring sterilization treatment device; the stirring and sterilizing treatment device is matched with the collecting and storing device. Various organic wastes can be reasonably treated and compounded to be converted into a composite carbon source, and nutrient substances required by sewage treatment denitrification microorganisms are balanced, so that the sewage treatment cost can be reduced, and the denitrification efficiency can be improved; meanwhile, resource recovery and reutilization of organic waste are realized, so that the production cost of the composite carbon source is reduced, and the urgent demand of the sewage treatment industry on the high-efficiency and low-cost carbon source can be met.

The invention discloses a sewage denitrification system based on autotrophic microorganisms, and relates to the technical field of biology. The sewage denitrification system comprises a wastewater supply unit, a strain supply unit and a biological membrane unit, the wastewater supply unit and the strain supply unit are respectively connected with the biological membrane unit and can respectively supply wastewater and strains to the biological membrane unit; the biological membrane unit is loaded with a filler; the filler comprises elemental sulfur and tourmaline, the strain comprises sulfur autotrophic denitrifying bacteria and tourmaline autotrophic denitrifying bacteria. According to the sewage denitrification system constructed through flora domestication and electron transfer improvement, chemical energy required by the reaction in the autotrophic denitrification process is reduced, efficient removal of total nitrogen is realized, and the denitrification reaction efficiency under the condition of low carbon-nitrogen ratio is improved.

The application relates to the technical field of wastewater denitrification, and discloses a composite carrier as well as a preparation method and application thereof. The composite carrier comprises porous molybdenum disulfide, the porous structure of the molybdenum disulfide in-situ grows zirconium metal organic frameworks, and the surface of the molybdenum disulfide is loaded with graphene. The composite carrier can not only serve as a place for denitrification of microorganisms, but also can improve the denitrification efficiency of the microorganisms.

The invention belongs to the field of treatment of industrial wastewater, and relates to a sulfate purification process which comprises the following steps: sequentially carrying out dosing reaction treatment, denitrification nitrogen removal treatment, reverse osmosis treatment, evaporation treatment, purification treatment and sodium sulfate crystallization treatment on high-salinity wastewater to finally obtain a sodium sulfate product. The invention also provides a system for the sulfate purification process. The system comprises a dosing unit, a denitrification unit, a reverse osmosis unit, an evaporation unit, a purification unit and a crystallization unit according to a material flow. According to the method, phosphate and sodium hydroxide are used for jointly treating high-salinity wastewater, and fluorine hardness and calcium hardness are efficiently removed. In addition, softening treatment including hardness removal, COD removal and deep softening is conducted on the wastewater again after evaporation and concentration operation, and the hardness and COD enriched again in the concentration processes such as the reverse osmosis process and the evaporation process are effectively reduced. In a word, the industrial wastewater in a high-salt environment can be treated with low energy consumption, and meanwhile, the yield of a sodium sulfate product is high.

The invention belongs to the technical field of chemical engineering separation, and provides a natural eutectic solvent and a preparation method and application thereof, the natural eutectic solvent comprises the following components: caprolactam, citric acid and water; wherein the molar ratio of caprolactam to citric acid is (1-4): (1-2); the mass of the water is 20-40% of the sum of the mass of the caprolactam and the mass of the citric acid. By introducing water as a third component, the viscosity of the system is effectively reduced, the mass transfer performance is improved, and the denitrification efficiency is improved. The eutecticevaporate solvent provided by the invention can provide more reaction sites, has relatively strong removal capacity and selectivity on nitrogenous organic matters, and can realize efficient denitrification under mild conditions. The natural deep-eutectic solvent prepared by the preparation method disclosed by the invention is applied to removal of basic nitrides of oil products, and has the advantages of short time consumption and low dosage, namely high removal efficiency.

The invention belongs to the technical field of sewage treatment, and particularly relates to integrated intelligent anaerobic denitrification equipment which comprises an equipment main body, an aeration pipe and an inclined plate filler, a water inlet pipe is arranged at the top of one side of the equipment main body, and the equipment main body is connected with an external wastewater supply mechanism through the water inlet pipe; a backflow pipe is arranged at the bottom of the equipment body, a thermometer is arranged at the top of the equipment body, a dissolved oxygen meter is arranged on one side of the thermometer, an aeration pipe is arranged on one side in the equipment body, and an aeration disc is arranged at the bottom of the aeration pipe. By arranging the aeration disc, the aeration pipe, the inclined plate filler, the guide plate, the biological filler, the reflux pipe and the reflux pump, the equipment consists of three groups of areas, namely an aeration area, a settling area and an ammoxidation biological deoxidation area, and the equipment adopts multifunctional subareas to create an environment suitable for efficient growth of ammoxidation bacteria; the mass-propagated ammonia oxidizing bacteria can form biological cenobium, compared with the traditional process, the volume load is greatly improved, the denitrification efficiency is improved through a biological method, and meanwhile, the operation cost is saved.

An aeration tank and a sewage treatment system are characterized in that an anoxic regulation and control mechanism and an aerobic regulation and control mechanism are arranged in an aeration tank body, the anoxic regulation and control mechanism can create an anoxic environment around the anoxic regulation and control mechanism so that the area becomes an anoxic section, and the aerobic regulation and control mechanism creates an aerobic environment around the aerobic regulation and control mechanism so that the area forms an aerobic section; in the process that sewage flows along the channel, the sewage sequentially passes through the anoxic zone and the aerobic zone, in the anoxic zone, most nitrate radicals and nitrite radicals in the sewage are reduced into nitrogen by denitrifying bacteria in activated sludge, and nitrogen elements in the sewage are removed; in the aerobic section, most ammonium nitrogen in the sewage is converted into nitrate and nitrite by nitrifying bacteria in the activated sludge, and nitrogen in the sewage is further converted and removed; the denitrification effect of the anoxic section and the nitrification effect of the aerobic section are synergistically carried out, so that nitrogen elements in sewage can be more effectively removed, the denitrification efficiency is greatly improved, up-to-standard discharge of the sewage is ensured, and eutrophication pollution to a water body is reduced.

The invention relates to the technical field of sewage treatment, and in particular to an intelligent sewage treatment system. The invention provides a nitrification unit, a denitrification unit, a pre-analysis unit, and an intelligent adjustment unit. A plurality of light transmission detection modules are arranged in the nitrification unit, and a tray module, a thickness measurement module, and a plurality of mud discharge ports are arranged in the denitrification unit. The pre-analysis unit obtains a water characteristic characterization value through the water transmittance at different heights under different aeration states of an aeration mechanism to determine whether water impurities have property characteristics. The property classification category of water impurities is determined according to the change of sludge in the tray by the intelligent adjustment unit, and a treatment method of the sludge in the tray is selected according to the property classification category. Thus, the properties of water impurities are classified according to the actual situation of sewage, the treatment method of sludge in sewage is adaptively adjusted, and the release efficiency of internal carbon sources in sewage and the efficiency of sewage denitrification are improved.

This invention discloses a zoned permeable reactive barrier (PRB) for groundwater denitrification using a combination of zero-valent iron / slow-release carbon and zeolite, and its operating process. The PRB's structure comprises: (1) a quartz sand water distribution zone; (2) Fe... 0 / C-Denitrifying bacteria reaction zone; (3) Zeolite adsorption zone. This invention uses a mixture of biomass slow-release carbon and artificial slow-release carbon as a slow-release carbon source, and adds zero-valent iron to construct Fe 0 The / C system, using a mixed denitrifying bacteria agent for rapid start-up, and a zoned permeable reactive barrier (PRB) operation process for groundwater denitrification have been developed. This includes: filling processes based on different media permeability coefficients, reaction zone packing material compatibility based on different slow-release rates, and operating parameters based on different groundwater nitrogen pollutant concentrations. This invention improves the adaptability of the PRB process to hydrogeological conditions, accelerates the start-up of the denitrification process, ensures denitrification effectiveness during the start-up phase, improves denitrification efficiency during operation, and extends remediation time.

The invention belongs to the technical field of sewage treatment, particularly relates to a preparation method and application of a rare earth modified biological carrier for strengthening MBBR denitrification, and more particularly relates to a preparation method and application of a rare earth modified biological carrier for accelerating biofilm formation and strengthening MBBR denitrification performance. The rare earth modified biological carrier is prepared by taking polyurethane sponge as a framework and taking polyvinyl alcohol and lanthanum oxide as fillers, when the rare earth modified biological carrier is used as the filler for an MBBR (moving bed biofilm reactor) process, the formation of a biological membrane can be effectively accelerated, the denitrification effect of the MBBR and the treatment effect of other pollutants can be improved, and the biological carrier is good in corrosion resistance in water as the composite filler, and can be used for preparing the composite filler for the MBBR process. The membrane forming efficiency is high, the service life is long, the enhanced MBBR denitrification effect is remarkable, the biocompatibility is good, recycling is convenient, and the preparation method is simple.

The present application relates to a multifunctional denitrification device for treating high-concentration ammonia nitrogen wastewater, and relates to the technical field of sewage treatment, which includes a reaction tank, a packing cylinder fixedly arranged in the reaction tank, a biological packing preset in the packing cylinder, a vertically arranged tank body, a feeding assembly arranged on the tank body, a filtering assembly, and a driving assembly arranged on the tank body, wherein a discharge pipe is connected to the reaction tank, and one end of the discharge pipe away from the reaction tank is located above the tank body, and a control valve is installed on the discharge pipe; the top of the tank body is an open structure, and a drain pipe is connected to the bottom of the tank body, and a valve is installed on the drain pipe; the filtering assembly includes a pressure plate coaxially arranged in the tank body, and the pressure plate abuts against the side wall of the tank body; a connecting hole is provided on the top surface of the pressure plate, and the driving assembly is used to move the pressure plate in the vertical direction, and the feeding assembly is used to add a reagent to the tank body. The present application can improve the denitrification efficiency of ammonia nitrogen wastewater.

The sewage treatment method can greatly reduce the sludge amount, and comprises the following steps: step 1, flocculants and magnetic powders are added into sewage to be treated, after magnetic flocculation, precipitation and magnetic separation recovery, preliminary purified water is obtained; step 2, microbial mixed stock solution containing anaerobic ammonia oxidation bacteria and aerobic granular sludge carriers are added into the preliminary purified water, and aeration and non-aeration cultivation reactions are alternately carried out in a sequencing batch reactor, so that water degradation and purification are completed, wherein, protozoa are added on the 2nd-3rd day of the cultivation reaction, metazoan is added on the 4th-5th day of the cultivation reaction, and the reactor enters a stable operation period on the 6th-14th day of the cultivation reaction; and step 3, the water after the reaction is sequentially subjected to filtration and disinfection treatment, and reaches the water standard; by constructing a complete micro-animal food chain from functional bacteria to protozoa and metazoan, and by utilizing the predation of higher micro-animals on lower microorganisms, the sludge is in-situ reduced, and the environmental and economic benefits are achieved.

The utility model discloses a sewage treatment device based on anaerobic ammonia oxidation, which comprises a PLC (programmable logic controller) and a first sedimentation tank, the first sedimentation tank is connected with a nitrosation reaction tank through a first connecting pipe, and the nitrosation reaction tank is connected with an anaerobic ammonia oxidation reactor through a second connecting pipe. The anaerobic ammonia oxidation reactor is connected with a second sedimentation tank through a third connecting pipe, and the second sedimentation tank is connected with a multi-layer filtering device through a fourth connecting pipe; an aeration disc is arranged at the bottom in the nitrosation reaction tank, and an air inlet of the aeration disc penetrates out of the nitrosation reaction tank and is connected with an induced draft fan through an aeration pipeline; the second connecting pipe is connected with an anaerobic bacteria culture device through a branch pipeline, and a one-way proportional valve for controlling the anaerobic bacteria culture device to fall into the second connecting pipe is arranged on the branch pipeline; the output end of the PLC is connected with the induced draft fan and the controlled end of the one-way proportional valve. According to the utility model, the denitrification efficiency of sewage can be greatly improved.