362 results about "Denitrification process" patented technology

The invention discloses a composite denitrification accelerant and a preparation method thereof, and belongs to the technical field of sewage treatment. The carbon source composite material is prepared from the following raw materials in parts by weight: 30-50% of a carbon source, 2-5% of vitamins, 2-5% of amino acids, 1-3% of a biological stimulant, 1-2% of signal molecules, 1-5% of metal elements, 3-5% of a pH regulator and 25-60% of water. Through metabolites such as vitamins, amino acids and biological stimulants, growth and reproduction of denitrifying bacteria are promoted, and functions of related enzymes in the denitrification process are improved. The signal molecule optimizes the metabolic activity of bacteria by regulating and controlling the expression of genes, related to the denitrification process, of the denitrifying bacteria. The metal ions can enhance the activity of the denitrifying enzyme, so that the efficiency of denitrification treatment is improved. According to the denitrification accelerant, the denitrification process is promoted through the synergistic effect of three aspects of growth and reproduction of denitrifying bacteria, expression of denitrification genes and improvement of activity of denitrification-related enzymes.

The invention discloses rapid denitrification composite carbon source particles as well as a preparation method and application thereof. The rapid denitrification composite carbon source particle is prepared from raw materials including a slow-release skeleton, a carbon source and an optional functional modified material. The invention integrates the advantages of two solid carbon sources (natural carbon source and artificially synthesized carbon source), and develops novel composite carbon source particles with excellent performance and high cost effectiveness by designing and regulating the formula, proportion and structure. The prepared rapid denitrification composite carbon source particles can ensure that microorganisms have stable carbon source supply in the whole denitrification process, and the denitrification efficiency reduction caused by discontinuous or non-uniform carbon source supply is avoided. The rapid denitrification composite carbon source particles prepared by the invention also have the characteristics of easy biofilm formation, easy fluidization, stable carbon release, lasting carbon supply, relatively high mechanical strength, low cost, wide application range, difficulty in breaking, long service cycle and large specific surface area, and can be well applied to a biological sewage treatment system as a microbial carrier.

Provided are a composite carbon source particle for rapid denitrification, and a preparation method therefor and the use thereof. The composite carbon source particle for rapid denitrification is prepared from raw materials including a sustained-release framework, a carbon source and an optional functionalized modification material. The composite carbon source particle for rapid denitrification can ensure the stable supply of a carbon source to microorganisms during the whole denitrification process, prevents a reduction in denitrification efficiency caused by discontinuous or non-uniform supply of a carbon source, has the characteristics of easily forming a biofilm, good fluidizability, stable carbon release, long-lasting carbon supply, relatively high mechanical strength, low cost, a wide application range, low risk of fragmentation, a long service cycle and a large specific surface area, and can be applied as a microbial carrier to a biological sewage treatment system.

The invention provides a low C / N sewage nitrogen and phosphorus removal method based on MABR-DPR-anaerobic ammonia oxidation, which couples anaerobic, membrane aeration anoxic and anaerobic ammonia oxidation processes, forms an anoxic environment in a water phase of a membrane aeration reactor, and enriches denitrifying phosphorus-accumulating bacteria. And the anaerobic phosphorus release and anoxic denitrification nitrogen and phosphorus removal processes of the denitrifying phosphorus-accumulating bacteria are realized through the backflow of the sludge between the anaerobic tank and the membrane aeration reactor. Nitrite accumulated in effluent of the membrane aeration reactor supplements an electron acceptor for a subsequent anaerobic ammonia oxidation deep denitrification process, and meanwhile, a carbon source is obviously consumed in an anoxic denitrification nitrogen and phosphorus removal process of the membrane aeration reactor, so that inhibition of influent organic matters on an anaerobic ammonia oxidation process is effectively weakened. The process solves the problem that the carbon source is seriously insufficient in the nitrogen and phosphorus removal process of the low C / N sewage, and the stable and efficient nitrogen and phosphorus removal effect can still be maintained under the condition that an external carbon source is not needed.

The invention relates to an MABR-based short-cut nitrification and denitrification coupled micro-aerobic biochemical treatment method, and relates to the technical field of water treatment. The device mainly comprises a two-stage MABR-PN / DN tank, a two-stage MABR micro-aerobic tank, a sedimentation tank, a gas supply system and a monitoring system, the MABR-PN / DN tank and the MABR micro-aerobic tank are respectively implanted into an MABR membrane box, sewage sequentially passes through the first-stage MABR-PN / DN tank, the first-stage MABR micro-aerobic tank, the second-stage MABR-PN / DN tank, the second-stage MABR micro-aerobic tank and the sedimentation tank, and the gas supply system is independently arranged and supplies gas to the MABR-PN / DN tank and the MABR micro-aerobic tank through pipelines. According to the invention, a short-cut nitrification and denitrification process and a low-aerobic nitrification and denitrification process are established by taking a microbial film growing on the outer surface of the MABR membrane filament as a carrier, meanwhile, a two-stage MABR-PN / DN tank and a two-stage MABR micro-aerobic tank are utilized, a nitrification liquid internal reflux system is not arranged to remove nitrogen, and the effluent index of a municipal sewage treatment plant is improved. The method has the advantages that the pollutant removal effect is good, the addition of an external carbon source is saved, the occupied area is saved, the treatment period is short, the energy consumption is low, and the sludge yield is reduced.

The invention relates to the technical field of organic wastewater resource utilization, in particular to a device and method for preparing a composite carbon source from high-concentration organic wastewater, and the device comprises a hydrolysis device, an acidification device, a separation device and a concentration device which are connected in sequence; the hydrolysis device and the acidification device are respectively provided with an up-flow type hydraulic circulation stirring system, and are provided with a labyrinth inclined plate and an effluent weir in a matched manner, so that low-consumption and high-efficiency mud-water separation can be realized; through an intelligent adjusting system, the temperature and pH value in the hydrolysis and acidification process can be automatically controlled, the fermentation efficiency of the material can be improved, the preparation period of the carbon source can be shortened, and the stability of the product can be improved; the quality of the carbon source is further improved through physical processes such as membrane separation and membrane concentration; the high-concentration organic wastewater generated in the processing process of organic garbage and agricultural products is converted into a high-added-value recycling product, and the high-concentration organic wastewater is applied to the denitrification process of a sewage treatment plant, so that the denitrification performance is improved, and the recycling utilization of the high-concentration organic wastewater is realized.

The invention belongs to the technical field of sewage treatment, and particularly relates to an intelligent response filter material, a preparation method thereof and a denitrification deep-bed filter tank. The intelligent response filter material is of a three-layer composite structure and sequentially comprises a carbon source inner core, a transition layer and a wrapping layer from the inner layer to the outer layer; the carbon source core comprises aquatic plant powder, aggregate and reinforced fibers, the transition layer adopts a hydrophilic modified porous carrier, and the wrapping layer adopts a pH responsive polymer. According to the invention, the intelligent response type filter material prepared from aquatic plant straws is adopted, and the pH response type envelope can automatically adjust the release rate of a carbon source according to the pH change caused by the denitrification process, so that intelligent on-demand supply of the carbon source is realized, and the denitrification efficiency and the utilization rate of the carbon source are greatly improved.

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

This invention discloses an optimization method and system for a multi-stage AO denitrification process with oxygen limitation, relating to the field of wastewater treatment technology. The method includes: analyzing the process characteristics of the multi-stage AO denitrification device with oxygen limitation to construct a multi-stage AO process chain; constructing a wastewater detection vector to generate a multi-stage AO control space; performing multi-node wastewater treatment decision combination to obtain a first wastewater treatment group; performing multi-dimensional risk constraint optimization to establish a second wastewater treatment group; performing quality evaluation optimization to obtain a third wastewater treatment group; and performing multi-round variational collaborative optimization on the third wastewater treatment group to treat the wastewater. This invention solves the technical problems of low treatment efficiency and unstable effluent quality in existing multi-stage AO denitrification processes with oxygen limitation, achieving optimization of the multi-stage AO denitrification process with oxygen limitation and improving wastewater treatment efficiency and effluent quality.

The invention relates to the technical field of water treatment, and discloses a sludge quality-divided reflux type aerobic-anoxic sulfur autotrophic activated sludge denitrification process. The process comprises the following steps: wastewater enters a sectional type aerobic tank, the wastewater enters the sectional type aerobic tank, organic matters are removed in a strengthened manner in a first section of aerobic tank, part of ammonia nitrogen is converted into nitrite nitrogen and nitrate nitrogen, and nitrification is strengthened in a second section of aerobic tank, so that the ammonia nitrogen is deeply removed; effluent of the sectional type aerobic tank enters an anoxic tank and is completely mixed with sulfur particles and activated sludge for sulfur autotrophic denitrification; effluent of the anoxic tank enters a secondary sedimentation tank for sedimentation, supernate is discharged, and bottom mud enters a hydrocyclone to be divided into heavy sludge and light sludge; the heavy sludge flows back to the front end of the anoxic tank, the light sludge flows back to the front end of the sectional aerobic tank, and the remaining sludge is discharged. According to the invention, sulfur autotrophic denitrification is deeply integrated into an activated sludge system, so that high-efficiency nitrogen removal without carbon source and internal reflux is realized.

The invention discloses an intelligent carbon source feeding control system based on a biological denitrification process. The intelligent carbon source feeding control system comprises an upper computer, a server, a PLC control cabinet, a dosing pump, a dosing pipeline, a process instrument and an algorithm engine. Wherein the algorithm engine is deployed on a server and comprises a front control module and / or a rear control module and a database, and the front control module and / or the rear control module are / is used for predicting the carbon source adding amount according to water inlet data, conducting iterative correction on the predicted carbon source adding amount according to water outlet indexes and process parameters and outputting the corrected carbon source adding amount; the PLC control cabinet is connected with the server, the dosing pump and the process instrument and used for uploading monitoring data of the process instrument to the algorithm engine and issuing the carbon source dosage output by the algorithm engine to the dosing pump. According to the system, carbon source feeding can be more refined and intelligent, and the operation stability of biological denitrification is ensured.

The invention discloses a membrane bio-membrane reactor and a method for efficiently coupling biogas recycling and denitrification by using the same, and relates to a reactor and a method for recycling and denitrifying biogas by using the same. The invention aims to solve the technical bottleneck problems that the traditional denitrification process depends on an external carbon source and is high in cost, and the existing methane-based membrane bio-membrane reactor cannot fully utilize biogas resources. The invention discloses a membrane bio-membrane reactor. Comprising a biogas high-pressure gas cylinder, a high-pressure gas pressure reducing valve, a reactor main body, a hollow fiber membrane assembly, a reactor main body water outlet, a reactor main body water inlet, a water inlet device, a reflux device, a circulating water outlet, a circulating water inlet, a gas sampling port, a reflux device water outlet, a liquid sampling port, a pH measuring instrument, a water outlet liquid sealing device and an atmosphere communication port. The mechanism of'one source and two purposes' (serving as an electron donor and converting into a carbon source in situ) of biogas methane is the core of realizing efficient denitrification and biogas resource utilization.

The invention discloses an ammonium carbamate denitration agent pyrolysis box for preventing crystallization. The ammonium carbamate denitration agent pyrolysis box comprises a box body, a conveying belt, a first heating assembly and a second heating assembly. The ammonium carbamate powder is heated from the upper portion of the ammonium carbamate powder through the first heating assembly, the ammonium carbamate powder is heated from the lower portion of the ammonium carbamate powder through the second heating assembly, it is effectively guaranteed that ammonium carbamate is completely decomposed on the conveying belt, and the defect that a medium can only be heated and decomposed from a single face through traditional heating equipment is overcome. Ammonium carbamate powder is fully pyrolyzed on the conveying belt, so that the problem of pipeline blockage caused by caking of ammonium carbamate in the flue gas denitration process is avoided. The box body can ensure that ammonium carbamate is fully decomposed to generate enough ammonia gas for denitration reaction, so that the denitration efficiency is improved. As the ammonium carbamate is directly decomposed in the box body, the ammonia preparation method does not need to be carried out under a high-temperature condition like the traditional urea ammonia preparation method, the ammonia preparation efficiency is improved by 5.9%-23.5% and averagely improved by 14.70% compared with the urea, and the ammonia preparation energy consumption is reduced by 48.0%-65.0%.

The utility model relates to a denitrification strengthening device based on AOA process coupling MABR membrane, which comprises a water distribution system, a biological reaction system and a sedimentation tank, the water distribution system comprises a water inlet pipeline, and the water inlet pipeline is provided with two branches, namely a water distribution pipeline I and a water distribution pipeline II; the water distribution pipeline I and the water distribution pipeline II are both connected with the biological reaction system; the biological reaction system comprises an anaerobic tank, an aerobic tank and an MABR membrane tank which are communicated in sequence, and an MABR membrane assembly is arranged in the MABR membrane tank; the MABR membrane tank is communicated with the sedimentation tank, the sedimentation tank is provided with a sludge return pipe which is connected to the front end of the anaerobic tank, and the sedimentation tank is also provided with a water outlet pipeline and a sludge discharge pipeline. The AOA process is coupled with the MABR membrane, so that the occupied area and the use amount of the MABR membrane are reduced, the two denitrification processes are superposed, the denitrification effect of sewage treatment is enhanced, and the denitrification efficiency is improved by more than 30%; the anoxic tank part of the AOA process is provided with the MABR membrane tank, and the MABR membrane tank can be used for synchronously carrying out denitrification and nitrification and denitrification under the condition of low carbon nitrogen ratio, so that efficient denitrification is realized.

The invention discloses an oxygen-limited multi-stage AO denitrification process optimization method and system, and relates to the technical field of sewage treatment.The method comprises the steps that process characteristic analysis is conducted on an oxygen-limited multi-stage AO denitrification device, and a multi-stage AO process chain is constructed; constructing a sewage detection vector, and generating a multi-section AO control space; performing multi-node sewage treatment decision combination to obtain a first sewage treatment group; performing multi-dimensional risk constraint optimization, and establishing a second sewage treatment group; performing quality evaluation optimization to obtain a third sewage treatment group; and performing multi-round variation collaborative optimization on the third sewage treatment group, and treating the to-be-treated sewage. According to the invention, the technical problems of low treatment efficiency and unstable effluent quality in the oxygen-limited multi-stage AO denitrification process in the prior art are solved, and the technical effects of optimizing the oxygen-limited multi-stage AO denitrification process and improving the sewage treatment efficiency and the effluent quality are achieved.

The invention provides a flue gas dust removal and denitration process, and belongs to the technical field of flue gas treatment.The denitration process comprises the following steps that flue gas to be treated is introduced into a pretreatment zone, large-particle dust and part of acid gas in the flue gas are removed, the treated flue gas is introduced into a catalytic reaction zone, and under the action of a corrugated plate catalyst, the flue gas is subjected to denitration treatment; spraying a reducing agent into the flue gas; introducing the flue gas subjected to the catalytic reaction into a deep purification area, and adsorbing and purifying residual fine dust by adopting an adsorbent; and then the treated flue gas reaching the standard is discharged. Through process integration and material innovation, the problems of low dust removal and denitration efficiency, easy catalyst deactivation, high operation cost and the like in the traditional technology are solved, and the method has the advantages of high purification efficiency, low energy consumption, wide application range and the like.

The invention belongs to the technical field of sewage treatment, and particularly relates to a composite carbon source additive and a preparation method thereof. The composite carbon source additive comprises the following components in parts by weight: 30-40 parts of bagasse, 8-12 parts of a polyvinyl alcohol derivative, 2-4 parts of a functional filler, 5-8 parts of potassium citrate and 5-8 parts of sodium pyruvate, the preparation process of the polyvinyl alcohol derivative comprises the following steps: adding polyvinyl alcohol, 1, 3, 5-benzene trisulfonic acid, triethylamine and 4-dimethylaminopyridine into dichloromethane to react, filtering, washing and drying; the polyvinyl alcohol derivative is obtained. The composite carbon source additive can be slowly released in the denitrification process and continuously and stably provide a carbon source, the denitrification process is promoted, and the denitrification efficiency is improved.

The invention relates to the technical field of accurate control scheme design for denitrification of a sewage treatment plant, in particular to an accurate control method and system for denitrification of a sewage treatment plant and electronic equipment. Data of carbon source concentration, dissolved oxygen concentration, pH value, temperature, alkalinity and nitrate concentration in sewage are collected in real time, parameters of a prediction model are dynamically corrected in combination with a machine learning algorithm and a mechanism model, and the denitrification rate is predicted. The carbon source adding amount and the dissolved oxygen target value are calculated according to the prediction result and the emission standard, the distribution of the carbon source and the dissolved oxygen in the reaction tank is monitored in real time through a distributed sensor network, and the operation states of a carbon source adding pump and aeration equipment are accurately adjusted through feedback control. According to the method, a pH value and alkalinity are taken as constraint conditions to cooperatively control a carbon source feeding rate and a dissolved oxygen concentration, and a control strategy is dynamically optimized through deep Q learning based on historical data and operation conditions, so that cross-cycle self-adaptive adjustment is realized, and accurate control on a denitrification process of a sewage treatment plant is realized.

The embodiment of the present invention discloses a method for dynamic collaborative optimization control of denitrification of a waste incinerator, which relates to the technical field of waste incineration treatment. The method comprises: obtaining the real-time collected operating parameters of the waste incinerator and performing preprocessing; based on the mechanism of waste incineration and denitrification reaction, combined with historical operating data, establishing a dynamic model of the denitrification process of the waste incinerator, wherein an autoregressive sliding average model is used to describe the denitrification process; according to the preprocessed operating parameters and the established dynamic model, the working conditions of the waste incinerator are identified and classified in real time; a multivariable model predictive control is used to formulate a collaborative control strategy; and the formulated collaborative control strategy is output to the actuators of the denitrification system and the incineration system. The method of the present invention can improve the denitrification efficiency, accurately control nitrogen oxide emissions, and reduce the ammonia escape rate and denitrification costs.

The invention relates to the technical field of environmental microbial resource development and sewage denitrification. The invention discloses an efficient denitrification strain Paracoccus sp.N21 with a flocculation characteristic, which is preserved in the China General Microbiological Culture Collection Center (CGMCC), and the preservation number is CGMCC No.34710. The invention further discloses a preparation method of the efficient denitrification strain Paracoccus sp.N21. The strain obtained by the invention can completely remove ammonia nitrogen within 12 hours and thoroughly remove nitrate nitrogen within 48 hours, the removal rate reaches 100%, and ammonia nitrogen is preferentially degraded in a mixed nitrogen source. The method has the unique advantages that the flocculation rate in the nitrification process and the flocculation rate in the denitrification process exceed 93.9%, and the usage amount of a flocculating agent can be greatly reduced. When actual kitchen wastewater is treated, the ammonia nitrogen removal rate reaches 100%, and the removal rate reaches up to 7.51 mg / (L.h). The application of the strain can effectively reduce the volume of a reactor, reduce energy consumption and operation cost, provides a new solution for simplifying a biological denitrification process, is particularly suitable for treating high-ammonia-nitrogen kitchen wastewater, and has remarkable environmental and economic benefits.

The invention relates to the technical field of environment monitoring, in particular to a physical and chemical factor coupled nearshore denitrification process influence factor analysis method, which comprises the following steps: S1, collecting a nearshore environment sample, and obtaining a physical and chemical factor data set; s2, on the basis of the physical and chemical factor data set, calculating the coupling strength between the physical and chemical factors, and generating a coupling strength matrix; s3, performing dimension reduction processing on the coupling strength matrix by adopting a principal component analysis method, and determining a key influence factor list; s4, analyzing the contribution degree of each dominant factor to the denitrification rate based on the key influence factor list, and generating a contribution degree analysis result; s5, according to the contribution degree analysis result, an influence factor analysis report of the nearshore denitrification process is output, and the analysis report comprises key influence factor sorting and optimization suggestions. The method provides intelligent and data-driven auxiliary decision support for coastal ecological restoration and water quality improvement, and has good popularization and application prospects.

The invention discloses a combined desulfurization and denitrification system of a coal-fired boiler, relates to the technical field of flue gas treatment of coal-fired boilers, and aims to overcome the defects that in the prior art, a desulfurization and denitrification system is dispersed in structure, extensive in control means, low in integration level, inaccurate in response and difficult to efficiently and synergistically remove SOx and NOx. A reducing agent supply system, a desulfurization tower and an alkali liquor supply system; the denitration process of the system is carried out in a flue of the coal-fired boiler; the desulfurization process of the system is carried out in the desulfurization tower. The reducing agent supply system comprises a urea box, an electromagnetic control valve and two reducing agent ejectors arranged in the flue, and the two reducing agent ejectors are oppositely arranged. The desulfurization tower is sequentially provided with a waste liquid box, a plurality of spraying pipes and a demister from bottom to top. The method is suitable for cooperative removal of SOx and NOx in flue gas of a coal-fired boiler and integrated optimization and reconstruction of an ultralow emission control system.

The application discloses a biological electrochemical auxiliary sulfur conversion promoting sulfur-based denitrification and sulfate emission reduction method and belongs to the field of water treatment. ‑ Nitrogen-containing wastewater enters an elemental sulfur denitrification system, and NO3 0 is reduced to N2 by sulfur autotrophic denitrifying bacteria, and elemental sulfur (S 2‑ ) is converted into SO4 2‑ . Effluent enters a cathode chamber of an electrochemical auxiliary sulfate reduction system, and hydrogen autotrophic sulfate reducing bacteria utilize cathode hydrogen production to reduce SO4 ‑ to HS 2‑ , and meanwhile, alkalinity produced by cathode hydrogen production neutralizes acidity produced in the denitrification process in the elemental sulfur denitrification system. ‑ HS 2‑ / supernatant is returned to the elemental sulfur denitrification system to react with S 0 to generate polysulfide (S n 2‑ ), S n 2‑ , which is used as an efficient electron donor to participate in denitrification, thereby significantly improving denitrification efficiency. The application does not need to add an organic carbon source, sludge production is small, high-concentration nitrogen-containing wastewater is efficiently treated, and the content of sulfate in effluent is simultaneously reduced, thereby realizing sulfur resource recycling, and the application is an economic and environment-friendly autotrophic denitrification method.

The present invention provides a pretreatment and temperature control method for efficient denitrification of aluminum ash. In the method, aluminum ash and an ammonium salt of a strong acid and weak base are mixed in a reactor, nitrogen is introduced to replace the gas, and then warm water is added to perform a pretreatment reaction on the aluminum ash. The present invention uses secondary aluminum ash and an ammonium salt of a strong acid and weak base as raw materials, and has a simple process flow and low cost. It solves the problem of sudden temperature increases during the pretreatment process during the recycling of secondary aluminum ash, ensuring the safety of the efficient denitrification process of the aluminum ash and having good environmental benefits. The present invention can control and maintain the aluminum ash pretreatment temperature below 65°C, ensuring the hydrolysis of aluminum nitride while controlling the sudden temperature increase, thus greatly ensuring the safety of the aluminum ash treatment process.

The invention relates to a local magnetothermal coupling biological rotating disc enhanced cold region sewage treatment method and system. The system comprises a reactor, a biological rotating disc for growing a biological membrane, a magnetic heat carrier, an alternating magnetic field generator and a motor for driving the biological rotating disc to rotate, the reactor comprises an air exposure area and a sewage area from top to bottom, a water inlet is formed in the lower part of the left side wall of the reactor, a water outlet flush with the water level of the sewage area is formed in the upper part of the right side wall, the reactor is further provided with vent holes, and the air exposure area is communicated with air through the vent holes; the biological rotating disc is partially immersed in the sewage area and partially exposed to the air exposure area in the radial direction; the air exposure area is located in the magnetic field action range of the alternating magnetic field generator, the magnetic heat carrier is arranged on at least one side of the biological rotating disc, and the magnetic heat carrier generates a magnetocaloric effect under the action of the magnetic field so as to increase the temperature of the biological membrane. According to the invention, the synergistic effect of precise heating of the biological membrane and the metabolic process of the biological membrane is realized, and the efficient and energy-saving sewage denitrification process at low temperature is realized.

The invention discloses a uniform distribution denitrification system, which comprises an aeration tank, wherein an aerator is arranged in the aeration tank; the anoxic cylinders are uniformly distributed in the aeration tank, efficient fillers are arranged in the anoxic cylinders, water outlet distribution holes are formed in the bottoms of the anoxic cylinders, water inlets and water inlet degassing areas are formed in the top ends of the anoxic cylinders, and water inlet distribution holes are formed in the side parts of the tops of the anoxic cylinders; and the raw water inlet assembly is used for conveying raw water into the anoxic cylinder. The invention also discloses a uniform distribution denitrification process. Compared with the prior art, multi-point uniform distribution of raw water and rapid and uniform mixing in an anoxic zone formed by the anoxic cylinder can be realized.

The invention discloses a sulfur autotrophic denitrification system monitoring and control method and system based on machine learning, and the method comprises the steps: collecting system operation parameter data in real time, inputting the system operation parameter data into a first machine learning model, and predicting the effluent nitrate nitrogen concentration of the system by the model; when the predicted concentration value is higher than a preset emission standard threshold value, an early warning signal is triggered; identifying key influence factors with high effluent nitrate nitrogen concentration value by adopting an SHAP interpretability analysis method, and carrying out quantitative sequencing on influence degrees of the factors; based on the obtained key influence factors and related data, a bimodal load management strategy or a precise chemical dosing strategy is selected and executed, and the effluent nitrate nitrogen concentration of the system is controlled within the emission standard threshold value range. The sulfur autotrophic denitrification system is subjected to monitoring-diagnosis-control closed-loop intelligent management, so that refined and active regulation and control of the sulfur autotrophic denitrification process are realized, and the operation stability, the treatment efficiency and the economical efficiency of the system are improved.

This application relates to the field of wastewater treatment, specifically disclosing a sulfur autotrophic denitrification process; including the following specific steps: S1: After adjusting the pH of calcium nitrate tetrahydrate solution and ammonium dihydrogen phosphate solution to alkaline, triethanolamine is added dropwise to the calcium nitrate solution, followed by the addition of ammonium dihydrogen phosphate solution to form a reaction solution. The pH of the reaction solution is maintained at alkaline, and the reaction is heated. After filtration, washing, and drying, hydroxyapatite powder is obtained. The hydroxyapatite powder is mixed with a foaming agent, foam stabilizer, and adhesive, pressed into shape, and sintered to obtain a porous ceramic carrier; S2: The porous ceramic carrier, ground inorganic energy material, and denitrifying bacteria are added to the wastewater to be treated, mixed, and subjected to aeration treatment. The inorganic energy material is replenished periodically to complete the process. The sulfur autotrophic denitrification process used in this application has high denitrification efficiency, and no replenishment of denitrifying bacteria is required during the process.

The invention relates to the technical field of sewage treatment, and discloses a system and a method for inhibiting nitrous oxide release in a sewage denitrification process, and the system comprises a water inlet unit, a denitrification reaction unit, a dissolved oxygen monitoring module, a central control unit, a gas collection unit and a performance evaluation module. The multi-point arrangement and encryption communication mode of the dissolved oxygen monitoring module improves the accuracy and safety of data acquisition, and the corrosion-resistant design of the gas collection unit and infrared absorption spectrometry detection ensure the reliability of gas analysis. The central control unit realizes the adaptive capability of the system through real-time monitoring and dynamic adjustment, and the performance evaluation module improves the long-term operation efficiency of the system through data analysis and optimization suggestion generation. According to the method, a dissolved oxygen dynamic balance regulation mechanism and a multi-parameter collaborative optimization strategy are introduced, and a real-time monitoring and feedback control technology is combined, so that the problem of generation of byproducts in the nitrification and denitrification process is solved, and the release amount of nitrous oxide is effectively reduced.

The present application relates to a kind of sulfur-based magnesium-containing autotrophic nitrogen and phosphorus removal biological carrier and its preparation method and application, belong to water deep processing field.The sulfur-based magnesium-containing autotrophic nitrogen and phosphorus removal biological carrier includes matrix material and active material distributed in the inside and / or at least part of surface of the matrix material;The matrix material includes elemental sulfur and sulfur compound;The active material includes basic magnesium-containing compound and / or mineral containing basic magnesium-containing compound.The sulfur-based magnesium-containing autotrophic nitrogen and phosphorus removal biological carrier has the ability of easy-to-use sulfur form by denitrification process and automatic adjustment system pH value, realizes deep denitrification and nitrogen removal, and the dissolved magnesium ion is transported into cell by improving ammonia nitrogen efficiency and forms phosphate precipitate, and the carrier is endowed with the function of efficient removal of ammonia nitrogen and phosphate.The sulfur-based basic magnesium-containing functional material provided by the present application is applied to deep processing or ecological buffer zone and other scenes, and can realize the coordinated deep removal of nitrate nitrogen, ammonia nitrogen and phosphate, and has wide application prospect.