138results 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 a device and a method for in-situ determination and reduction of greenhouse gas emission in a nitrogen and phosphorus removal process of an AOA process, and belongs to the field of sewage treatment and carbon neutralization. The device comprises a gas collection type continuous flow AOA reactor, an accurate aeration system, a gas collection system, a microelectrode system and the like. According to the device, a greenhouse gas in-situ monitoring system and a regulation and control system are integrated, the emission condition of greenhouse gases (CO2, CH4 and N2O) in the operation process of the AOA technology can be monitored in real time, then parameters such as dissolved oxygen and the sludge reflux ratio are automatically adjusted, the operation conditions are optimized, and emission of the greenhouse gases is effectively reduced. The method is also combined with a biological enhancement technology, and the ecological niche of the microbial community is adjusted by adding anaerobic ammonia oxidation filler, so that the nitrogen and phosphorus removal efficiency of the AOA process is further improved, and meanwhile, the generation of greenhouse gases is reduced. The device can comprehensively monitor the greenhouse gas in the AOA process, and provides technical support for greenhouse gas research in the biological sewage treatment process.

The invention discloses a biological filler for enhancing denitrification of an aerobic tank as well as preparation and application of the biological filler, the problem of weak activity of denitrifying bacteria is successfully solved by loading three layers of biological fillers, namely an inner layer-denitrifying bacteria, a middle layer-conducting layer and an outer layer-nitrifying bacteria, on the filler, and rapid formation of a biological membrane is realized. In addition, a metal conducting layer is additionally arranged in the middle to participate in electron transfer in the microbial denitrification process, and the biological membrane layers on the two sides achieve rapid formation of biological membranes so as to achieve conversion and removal of nitrogen. According to the method, the biological activity of the thalli can be kept, the rapid formation of a biological membrane is realized, and the separation of the thalli and refractory organic matters can be promoted, so that the toxic action on the thalli is reduced.

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 discloses a method for reinforcing anaerobic ammonia oxidation denitrification and dephosphorization of an urban sewage treatment plant by using a falling biological membrane. The method is realized based on a system consisting of two main units, namely a functional area I and a functional area II. Inlet water of the first functional area and part of outlet water of the settling pond enter a second functional area anoxic zone (8), and sludge of the second functional area flows back to a first functional area nitrogen and phosphorus removal unit (1) of the urban sewage treatment plant from a second functional area settling pond (9) through a sludge backflow pipeline (10). Therefore, the overall anaerobic ammonium oxidation bacteria abundance of the suspended sludge in the system of the functional area I is enhanced, and the denitrification performance is further improved. The anoxic zone reduces the nitrogen load of the whole system, and meanwhile, part of carbon sources saved in the anaerobic ammonia oxidation process are beneficial to biological phosphorus removal. According to the method, the nitrogen and phosphorus removal performance can be effectively improved without interrupting operation of the sewage treatment plant, and the method is suitable for upgrading and reconstruction of a built urban sewage treatment plant or deep nitrogen and phosphorus removal of a newly built sewage treatment plant.

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 utility model discloses an aquaculture wastewater up-to-standard discharge treatment device which comprises a sludge storage tank, a solid-liquid separator, a stock solution tank, a regulating tank and an integrated aquaculture wastewater treatment device, the integrated culture wastewater treatment device comprises an up-flow anaerobic granular sludge treatment unit, an activated sludge treatment unit, a short-cut nitrification-anaerobic ammonia oxidation treatment unit and a contact oxidation treatment unit, wherein the short-cut nitrification-anaerobic ammonia oxidation treatment unit improves the sludge activity by forming hydroxyapatite carrier type anaerobic ammonia oxidation granular sludge, and realizes synchronous nitrogen removal and phosphorus recovery. The inclined tube assemblies and the hollow folded plate type precipitators are arranged in the units of the integrated treatment device, so that the precipitation water conservancy condition is improved, the precipitation effect is improved, and the effluent can meet the discharge standard of pollutants in the livestock and poultry industry. The integrated device has the advantages of compact structure, small occupied area, small aeration rate, low sludge yield and synchronous low-carbon nitrogen removal and phosphorus resource recovery.

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 an aquaculture integrated anaerobic ammonia oxidation denitrification device and a process thereof, and relates to the technical field of sewage treatment.The aquaculture integrated anaerobic ammonia oxidation denitrification device comprises a tank body, an exhaust port is formed in the top of the tank body, a drain outlet is formed in the bottom of the tank body, and a water outlet and a water inlet are formed in the side wall of the tank body; the interior of the tank body is divided into a clear water area, a PD / A reaction area, an anaerobic reaction area, a vertical flow precipitation area and a sewage collection area from top to bottom, and water quality detection ports are formed in the side walls, located in the anaerobic reaction area and the PD / A reaction area, of the tank body. Breeding tail water enters the tank body from the vertical flow sedimentation area and passes through the anaerobic reaction area and the PD / A reaction area, clear water enters the clear water area to be discharged, and sludge enters the sewage collection area to be discharged. And the defect that the traditional nitrification and denitrification nitrogen removal reaction process is not suitable for large-flow and low-nitrogen pollution load aquaculture water treatment is overcome.

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 relates to an anaerobic ammonia oxidation denitrification device and method for nitrogen-containing wastewater in a rare earth mining area, and relates to the technical field of anaerobic ammonia oxidation denitrification of nitrogen-containing wastewater. Comprising a pretreatment mechanism and a denitrification mechanism, heavy metal ions, SS and COD in wastewater are removed through the pretreatment mechanism, and a suitable production environment is provided for anaerobic ammonium oxidation bacteria through the denitrification mechanism; the method can solve the following problems in the anaerobic ammonia oxidation denitrification process of the nitrogen-containing wastewater in the prior art: a large amount of heavy metal ions contained in the wastewater inhibit the activity and denitrification efficiency of anaerobic ammonia oxidation bacteria, and excessive SS and COD are harmful to the environment and cause serious corrosion and blockage of wastewater treatment facilities; a large amount of maintenance cost needs to be consumed; the denitrification environment in the prior art is not suitable for survival of anaerobic ammonium oxidation bacteria, so that the anaerobic ammonium oxidation denitrification efficiency is reduced.

The invention discloses an intelligent low-carbon treatment and recycling system for rainwater and sewage. The system comprises a biological retention module used for collecting and treating rainwater to obtain treated rainwater; the numerical control drainage module is used for collecting oxidation-reduction potential data and pH value data of the processed rainwater as environmental data to be transmitted to the control module, and discharging the processed rainwater in a preset duration based on a first control signal sent by the control module; the rainwater and sewage collecting module is used for storing the discharged treated rainwater and maintaining the water storage amount within a preset range; the irrigation module is used for collecting soil humidity data of the bioretention module and transmitting the soil humidity data to the control module, and extracting stored water in the rainwater and sewage collection module based on a second control signal sent by the control unit to irrigate the bioretention module; the control module is used for receiving the environment data and performing double judgment, sending a first control signal when a preset condition is met, receiving the soil humidity data, and sending a second control signal when the preset condition is met. The stable and efficient low-carbon treatment and recycling of the rain sewage are realized.

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 invention discloses a wastewater autotrophic denitrification method using desulfurization waste liquid as an electron donor, and belongs to the field of coking desulfurization waste liquid resource utilization and wastewater denitrification. It uses thiosulfate and thiocyanate in the desulfurization waste liquid as electron donors to carry out sulfur autotrophic denitrification to remove nitrate nitrogen in the wastewater. The invention uses reduced sulfur in the desulfurization waste liquid as an electron donor for sulfur autotrophic denitrification to remove nitrate nitrogen in the wastewater so that the effluent meets the discharge standard or improves the purity of product salt in zero discharge of wastewater (such as coking wastewater). It has the characteristics of not requiring an external organic carbon source, being able to use a variety of sulfur sources, having low operating costs, high denitrification efficiency, and low sludge production, and realizes waste treatment with waste, and reduces the cost of pollutant disposal and wastewater denitrification.

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 discloses an alloy for synthesizing IIa type diamonds, which is prepared from the following raw materials in percentage by mass: 70-85% of iron powder, 15-25% of aluminum powder and 2-3% of titanium powder, and a preparation method of the alloy comprises the following steps: respectively weighing the iron powder, the aluminum powder and the titanium powder according to the mass percent; after iron powder, aluminum powder and titanium powder are evenly mixed, the mixture is put into a vacuum smelting furnace to be smelted, and an intermediate material is obtained after smelting; pressing the material into an alloy bar by using a hot extrusion die; carrying out linear cutting processing on the alloy bar to obtain an initial alloy sheet; and the initial alloy sheet is subjected to vacuum sintering purification, the alloy for synthesizing the IIa type diamond is obtained, and the alloy is applied to synthesis of the IIa type diamond. The quality of the IIa type diamond prepared by the method is guaranteed, the yield is high, and the high-yield and high-quality IIa type diamond can be synthesized under the condition of low cost.

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.