252 results about "Denitrification process" patented technology

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 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 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 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 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 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 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 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 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.

The utility model discloses an anaerobic ammonia oxidation water treatment device, which relates to the technical field of sewage treatment and comprises a tank body, an exhaust port is arranged at the top of the tank body, a drain outlet is arranged at the bottom of the tank body, and a water outlet and a water inlet are respectively arranged on 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 settling area and a sewage collecting area from top to bottom. 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.

This invention discloses a method for controlling the addition of supernatant from kitchen waste as a carbon source for denitrification based on three-dimensional fluorescence spectroscopy. The method includes steps such as sample collection and detection, three-dimensional fluorescence spectral processing, establishment of a multiple linear regression model, and control of the carbon source dosage. By acquiring real-time online data on the changes in three-dimensional fluorescence spectra during the denitrification process of nitrate-containing wastewater and combining this with a multiple linear regression model to predict carbon source consumption, this invention achieves precise control of the carbon source dosage, ensuring a sufficient supply of carbon source during the denitrification stage while avoiding waste caused by excessive carbon source addition. This significantly improves the denitrification rate, reduces energy consumption and operating costs, and ensures that the effluent quality meets standards.

This invention relates to a composite ecological device for in-situ enhanced denitrification of low-temperature river water and its application. The composite ecological device for in-situ enhanced denitrification of low-temperature river water comprises, from top to bottom, an insulation layer, a nitrification layer, and a denitrification layer. The nitrification layer includes a biological blanket and composite biological packing material fixed on the biological blanket, with low-temperature resistant nitrifying bacteria inoculated on the biological blanket and composite biological packing material. The denitrification layer includes packing balls, which are doped with a slow-release carbon source and inoculated with low-temperature resistant denitrifying bacteria. This invention also provides an application of the composite ecological device for in-situ enhanced denitrification of low-temperature river water. This invention solves the problem of significantly reduced biological denitrification efficiency in traditional denitrification processes under low-temperature conditions, as well as the problems of poor connection between stratified treatments leading to retention of nitrification products, and insufficient alkalinity in the denitrification zone inhibiting denitrification. It also solves the problem of uncontrollable carbon source addition leading to secondary pollution.

The application discloses a residual oil hydrogenation catalyst and a preparation method and application thereof. The preparation method of the catalyst comprises the following steps: impregnating an active metal solution C1 into a polyimide carrier, drying and calcining to obtain a metal / polyimide material; putting the obtained metal / polyimide material into a gelatinization solution, synthesizing a silicon and carbon-containing pseudo-boehmite wet filter cake, drying the silicon and carbon-containing pseudo-boehmite wet filter cake to obtain a silicon and carbon-containing pseudo-boehmite; shaping the obtained silicon and carbon-containing pseudo-boehmite, drying to obtain an intermediate; mixing the obtained intermediate with an active metal solution C2 for second impregnation, drying, and calcining in an oxygen-containing atmosphere to obtain the catalyst. The catalyst provided by the application is applied to residual oil hydrogenation treatment, and exhibits excellent catalytic performance in the desulfurization and denitrification processes, and also exhibits good catalytic capacity in the removal of residual carbon and metals.

This invention discloses the application of a salt-tolerant immobilized denitrifying microbial agent in denitrification of low-temperature saline river water. The salt-tolerant immobilized denitrifying microbial agent is placed in a net bag and evenly suspended in the river channel. The salt-tolerant immobilized denitrifying microbial agent uses zeolite as the immobilization carrier, and the immobilized microorganisms are salt-tolerant denitrifying microbial agents enriched and screened from rivers flowing into the sea. The dosage of the salt-tolerant immobilized denitrifying microbial agent is 2 g·L⁻¹. ‑1 The dosage is the mass-to-volume ratio of the immobilized denitrifying bacterial agent to the river water. The low-temperature saline river water is saline river water with nitrate nitrogen as the main pollutant. The temperature of the low-temperature saline river water is 10℃~25℃. During the denitrification process, a carbon source is added to the river water to maintain denitrification efficiency. This invention has demonstrated its feasibility in practical engineering applications through pilot-scale experiments. It can effectively remediate river pollution and solve the problem of severe and difficult-to-remediate water pollution in saline rivers.

The invention relates to the technical field of biological sewage treatment, in particular to a method for realizing heterotrophic nitrification-aerobic denitrification nitrogen removal of wastewater with a low carbon nitrogen ratio. According to the method for realizing heterotrophic nitrification-aerobic denitrification nitrogen removal of the wastewater with the low carbon-nitrogen ratio, an exogenous magnetic field is introduced into a slow-release carbon source system, so that the central magnetic field intensity of an aeration tank is 10-40mT, and the metabolic activity of cellulose degrading bacteria in the system is enhanced and the degradation process of cellulose is promoted by utilizing a magnetic biological effect excited by the magnetic field; the carbon source release efficiency is improved, and the problem of limited carbon release amount of the slow-release carbon source is solved. The enhanced carbon release process effectively increases the carbon nitrogen ratio, provides sufficient organic carbon sources and electron donors for heterotrophic nitrification-aerobic denitrification bacteria, makes the heterotrophic nitrification-aerobic denitrification bacteria have advantages in competition with autotrophic bacteria, further enhances the dominant position of heterotrophic nitrification-aerobic denitrification in the denitrification process without changing other operating parameters, realizes efficient denitrification, and improves the denitrification efficiency. Cost is low, operation is simple, and effect is remarkable.

This invention discloses a method for enhancing a short-cut nitrification-denitrification process. The process flow is as follows: influent → Feammox tank → short-cut nitrification tank → denitrification tank → NDFO tank → transition sedimentation tank → effluent. The transition sedimentation tank is used to hold NDFO sludge, thus facilitating the timed exchange of Feammox sludge and NDFO sludge. When the NDFO sludge and supernatant have completely entered the transition sedimentation tank, the Feammox sludge flows into tanks A / B. When the Feammox sludge has completely flowed into tanks A / B, the NDFO sludge flows from the transition sedimentation tank into tanks B / A. The sludge exchange frequency is adjusted according to changes in the influent / effluent water quality. This method, through the timed exchange of NDFO sludge and Feammox sludge, not only achieves the continuous execution of the Feammox and NDFO coupled denitrification process but also activates zero-valent iron, thereby establishing a stable and reliable iron source. The method of this invention can not only reduce the costs of carbon source addition, aeration volume and sludge disposal, but also reduce coupling risks while alleviating the pressure of mainstream denitrification and improving the quality of effluent.

The present application relates to sewage treatment device technical field, especially to a kind of sludge landfill pit high nitrogen pollution leachate's enhanced denitrification method. First, mesh cover box and related biological gel particles are placed on the float, and the denitrification device is prepared;Second, the water body is introduced and the biological denitrification process is realized by propeller and steering mechanism. Then, according to the water quality, the denitrification area is automatically adjusted, and the denitrification effect is optimized. Finally, through the solar power generation and driving control steps, the device is energy self-sufficient, and the driving route and speed are controlled by the central processing unit, to maximize the denitrification efficiency. The present application closely combines short-cut nitrification and anaerobic ammonia oxidation, and uses the small unit structure of the capsule to realize the way that short-cut nitrification and anaerobic ammonia oxidation can be directly coupled in wastewater treatment. The contribution ratio of short-cut nitrification and anaerobic ammonia oxidation can be automatically adjusted according to the proportion of ammonia nitrogen and nitrite nitrogen in the water body. The present application has the advantages of remote operation, no need for external carbon source, saving oxygen supply energy consumption, high denitrification efficiency, no need for sludge discharge, strong adaptability, etc., and achieves the effect of pollution reduction and carbon reduction.

The utility model relates to a system for treating high-ammonia-nitrogen wastewater and recycling ammonia water resources by utilizing a low-temperature heat source, which comprises a steam stripping tower, a high-ammonia-nitrogen wastewater treatment device, a high-ammonia-nitrogen wastewater treatment device and a low-temperature heat source, the air blower is connected with the middle part of the steam stripping tower; the first heat exchanger exchanges heat with the material discharged from the bottom of the steam stripping tower through a production area low-grade heat source, and the material discharged from the bottom of the steam stripping tower after heat exchange flows back to the top of the steam stripping tower; a material discharged from the top of the steam stripping tower flows into the first spraying absorption tower from the bottom of the first spraying absorption tower; a material discharged from the top of the first spraying absorption tower flows into the second spraying absorption tower from the bottom of the second spraying absorption tower; a material discharged from the top of the second spraying absorption tower flows into the falling film absorption tower from the bottom of the falling film absorption tower. According to the utility model, a low-grade heat source is utilized, and the produced ammonia water can be used in a flue gas denitration process at a production end, so that the cost for ammonium salt treatment caused by acid absorption is avoided.

The invention discloses a sewage denitrification process prediction control method based on data driving, and the method comprises the steps: constructing a sewage denitrification process multi-step prediction model, obtaining a multi-step prediction output value through an iterative loop mode based on a controlled state variable and a control variable of a sewage denitrification process, and carrying out the prediction control of the sewage denitrification process. The controlled state variables comprise the nitrate nitrogen level and the dissolved oxygen concentration, and the control variables comprise the water inlet flow and the oxygen transfer coefficient; a transform network offline identification multi-step prediction model is adopted, and a sampled historical control variable and a controlled state variable are used as training input of the transform network; and constructing a target function, solving according to a gradient descent method to obtain an optimal control law under a target set point, and acting the optimal internal reflux and oxygen transfer coefficient on the sewage denitrification system to control the nitrate nitrogen level and the dissolved oxygen concentration. According to the method, the irregular time sequence dependency relationship among multiple variables in sewage treatment is captured through an attention mechanism, and a better tracking control effect is obtained.

The present application provides a kind of denitrification process and denitrification system of rare earth tail water.The denitrification process includes: step S1, the pretreatment of rare earth tail water is carried out, and pretreated tail water is obtained;Step S2, pretreated tail water is subjected to multiple partial nitrification-anammox denitrification treatment, and primary denitrification wastewater is obtained;And step S3, primary denitrification wastewater is subjected to CANON process denitrification, and denitrification water and sludge are obtained.The above method is subjected to multiple partial nitrification-anammox denitrification treatment and CANON process, so that the nitrogen in rare earth tail water is converted into N2 and removed, achieving the purpose of wastewater denitrification.And the advantages of partial nitrification-anammox are fully retained in the above process, and effective denitrification can be achieved without adding organic carbon source.

This invention discloses a flue gas denitrification device and method. The device is suitable for SCR flue gas denitrification process of ultra-low temperature flue gas, and includes: multiple catalyst modules arranged in rows and columns on the cross-section of the flue, used to adsorb NO in the ultra-low temperature flue gas in a non-heated state. x The NH3 in the ammonia-air mixture, and the NO when heated to the flue gas denitrification window temperature. x The catalyst undergoes a denitrification reaction with NH3. A microwave assembly is positioned above the catalyst modules within the flue gas duct. This assembly includes a horizontally moving microwave generator for heating each catalyst module in a row or column, zone by zone. Once the heated zone has completed the denitrification reaction and the catalyst has been regenerated, the microwave generator moves to the next zone for heating. This invention, through the modular design of the catalyst and the built-in, movable microwave source, enables the catalyst modules to be heated zone by zone in a step-by-step manner, achieving rapid temperature rise of the catalyst module to the flue gas denitrification window temperature and quickly completing the catalyst regeneration process.