3086 results about "Denitrification" patented technology

The invention relates to the technical field of industrial flue gas purification, and discloses a flue gas denitration pollution reduction and carbon reduction method and system based on model prediction control. The method comprises the following steps: collecting flue gas data through a sensor to obtain a flue gas distribution state; the state is processed through a preset model, and a nitrogen oxide concentration predicted value is determined; judging a regulation and control demand based on the predicted value and generating an adjustment coefficient sequence; calculating an opening value of an ammonia spraying distributor by adopting a particle swarm optimization algorithm, and determining ammonia spraying amount distribution; a control instruction is sent according to ammonia spraying amount distribution, and a temperature uniformity index is evaluated based on temperature feedback data; adjusting optimization algorithm parameters according to the indexes, and generating an optimized ammonia spraying strategy; updating the predicted value and determining the stable range of the denitration efficiency; verifying the ammonia escape concentration in the stable range to obtain a system performance index; and forming a continuous regulation and control sequence according to cyclic feedback of the indexes. According to the invention, accurate dynamic regulation and control of ammonia spraying amount are realized, denitration efficiency and system stability are effectively improved, and the risk of ammonia escape is significantly reduced.

The invention provides a sewage treatment carbon source adding control method, and relates to the technical field of sewage treatment, and the method comprises the following steps: obtaining water inlet parameters of a water inlet end of sewage to be treated and process parameters of a treatment section, the water inlet parameters comprising chemical oxygen demand, total nitrogen, total phosphorus and flow; the process parameters comprise the phosphate concentration at the tail end of an anaerobic tank, the nitrate concentration at the tail end of an anoxic tank, and the total nitrogen and chemical oxygen demand of inlet water of a denitrification filter tank; dynamically calculating a predicted carbon-nitrogen ratio and a predicted carbon-phosphorus ratio in real time according to water inlet parameters and the process parameters; based on the predicted carbon-nitrogen ratio, the predicted carbon-phosphorus ratio and a preset effluent quality standard, a carbon source adding point and a first carbon source adding amount are determined, and the carbon source adding point comprises at least one of an anaerobic tank, an anoxic tank and a denitrification filter tank; according to the carbon source feeding point and the first carbon source feeding amount, the carbon source feeding device is controlled to execute corresponding feeding operation, through segmented feeding and closed-loop control, COD standard exceeding caused by excessive carbon sources is avoided, and secondary pollution is effectively inhibited.

The invention discloses a karst underground river system multi-source pollution comprehensive quantitative traceability method, which comprises the following steps: S1, multi-dimensional sample collection and new pollutant screening: carrying out multi-period sampling on a water body, measuring conventional water quality indexes and nitrogen and oxygen isotopes, screening new pollutants, and carrying out targeted quantification on characteristic new pollutants; s2, principal component analysis dimension reduction and pollution factor identification: carrying out principal component analysis on conventional indexes and new pollutant data, extracting principal components of which the cumulative contribution rate exceeds 85%, identifying composite pollution factors, and eliminating secondary interference factors; s3, nitrogen and oxygen isotope auxiliary verification and denitrification elimination: eliminating denitrification interference by utilizing the ratio of delta 15N-NO3 <-> to delta 18O-NO3 <-> in combination with underground water burial depth and runoff velocity, and distinguishing the nitrate source as a chemical fertilizer, soil nitrogen or sewage and wastewater; and S4, PMF model optimization and pollution source quantification: inputting the conventional indexes and the new pollutant concentration matrix into a PMF model, and analyzing the contribution rate of each pollution source.

The invention discloses a denitration system inlet nitric oxide disturbance and super-emission control method and system, and the method comprises the steps: adjusting the operation oxygen amount and the over fire air ratio in real time based on the measured values of the carbon monoxide concentration and the nitric oxide concentration of the denitration system inlet; based on denitration system operation data, combining actual sampling delay time to carry out sample data alignment and construct a training sample set; constructing a prediction model based on the training sample set, obtaining a nitrogen oxide concentration prediction value of the inlet of the denitration system through the prediction model, and updating the prediction model in real time; based on the difference between the average value of the outlet nitrogen oxide concentration of each partition and a set value and the difference between the concentration value of the nitrogen oxide at the outlet of the denitration system and the set value, and by combining the predicted value of the nitrogen oxide concentration at the inlet of the denitration system, treatment measures after the nitrogen oxide concentration super-emission are set in a segmented mode. The control performance of the denitration system can be improved, the ammonia spraying amount is reduced, the ammonia escape concentration is reduced, and the system automation input rate is increased.

The invention relates to the technical field of tail gas treatment, and provides a tail gas denitration reactor for hydrogenation catalyst production, the tail gas denitration reactor comprises a treatment box and an adsorption shell mounted in the treatment box, one end of the adsorption shell is connected with a gas inlet pipe, the other end of the gas inlet pipe is connected with a gas outlet pipe, and two ends of the adsorption shell are provided with a plurality of connecting grooves; the upper end of the adsorption shell is connected with a first connecting frame and a second connecting frame. The two ends of the first gas filtering bin and the two ends of the second gas filtering bin are meshed and installed on the gear shaft, so that the gear shaft drives the first gas filtering bin and the second gas filtering bin to rotate, the first gas filtering bin and the second gas filtering bin alternately conduct tail gas adsorption work, and in the standby replacement process, the filter elements in the first gas filtering bin and the second gas filtering bin are cleaned; the device can adsorb tail gas in a long-term and high-quality mode, the problems that the filter element is blocked and the adsorption effect is reduced due to long-time use of the filter element are solved, and environment-friendly emission of the tail gas can be achieved in the hydrogenation catalyst production and manufacturing process.

The invention discloses a biological nitrogen and phosphorus removal MBR sewage treatment system and a treatment process thereof. The process comprises the following steps: 1) pretreatment; 2) treatment in an anaerobic tank; (3) treating in an anoxic tank; 4) treatment in an aerobic tank; 5) MBR membrane pool treatment; sewage enters the box body through the water inlet, the moving mechanism drives the aeration mechanism and the scum cleaning mechanism to move, the aeration mechanism performs aeration treatment on the sewage in the box body, and when the aeration mechanism blows gas into the sewage through the branch gas pipe, bubbles can be scattered by spiral blades, so that the contact area between the gas and liquid is further increased, and the aeration effect is enhanced; when the sewage is subjected to aeration treatment, the scum after aeration treatment rises, the scum cleaning mechanism scrapes the scum floating after aeration for multiple times, collects the scraped scum and sends the scum out of the box body, impurities suspended in the middle layer of the sewage are fished, and the sewage after scum cleaning enters the next treatment procedure through the water outlet.

The invention discloses a river nitrogen pollutant source analysis method based on drainage basin nitrogen turnover and isotope, and particularly relates to the technical field of water treatment.The river nitrogen pollutant source analysis method comprises the following steps that a drainage basin to be researched is selected, river water and soil samples in the drainage basin are systematically collected, and physical and chemical indexes and isotope indexes # imgabs0 # of the collected samples are tested. Nitrate marked by nitrogen isotope delta 15N / delta 18O and # imgabs1 # are used as key indication marks to perform high-precision identification on nitrogen sources in a river and an environmental system, the contribution proportion of different nitrogen sources to the nitrate concentration in a water body is quantified through a stable isotope analysis model, and the concentration of the nitrate in the water body is calculated. And in combination with data, the rates of denitrification and anaerobic ammonia oxidation in environmental samples, sediments and soil are directly measured through combined application of an isotopic tracer technology and a membrane inlet mass spectrometer technology.

The invention discloses an intelligent control method for a desulfurization and denitrification integrated device based on multi-sensor data fusion, and relates to the technical field of industrial flue gas treatment, and the method comprises the following steps: (1) collecting flue gas parameter data in real time through a gas concentration sensor, a temperature sensor, a pressure sensor and a flow velocity sensor of the desulfurization and denitrification integrated device; according to the intelligent control method for the desulfurization and denitrification integrated device based on multi-sensor data fusion, the control precision and the response speed of the desulfurization and denitrification device under complex working conditions are improved through the collaborative design of dynamic credibility evaluation and the differentiable weight decision tree. Sensor noise is separated in real time based on a multi-scale space-time convolutional network, an edge-cloud dual verification mechanism is combined, the system can complete abnormal data shielding in a short time when smoke components suddenly change, compared with a traditional method, the pollutant concentration prediction error is reduced, the generation delay of an ammonia spraying amount regulation and control instruction is shortened, and the method is suitable for large-scale popularization and application. And the system robustness when the sensor fails or the load suddenly changes is ensured.

The invention provides a low-carbon circulating technological process for treating high-total-nitrogen wastewater. A main treatment unit and a resource recycling and circulating unit are included; the main treatment unit is characterized in that high-total-nitrogen wastewater sequentially passes through a pH regulating tank, a sulfur autotrophic denitrification tank, a biochemical system, a secondary sedimentation tank, a deep treatment line and ultrafiltration reverse osmosis, produced reclaimed water enters produced water for delivery, and a part of produced concentrated water enters a resource recovery and circulation unit; the resource recovery and circulation unit is characterized in that after concentrated water is treated by a vertical electrophoresis device, mixed acid, mixed alkali and low-salt water are separated out, the mixed alkali is sent to a sulfur autotrophic denitrification tank to be used for supplementing alkalinity consumption of the sulfur autotrophic denitrification system, and the mixed acid sequentially passes through an anaerobic regulating tank, an anaerobic reactor, an alkali washing tower, a biological desulfurization reactor and a sedimentation tank; the recovered sulfur can be sold as elemental sulfur or reused in the sulfur autotrophic denitrification tank, and supernate flows back to the alkaline tower; a green, low-carbon and recyclable water treatment process flow is realized.

The present application provides a control method for adding a carbon source to sewage treatment, which relates to the technical field of sewage treatment, comprising the following steps: obtaining water inlet parameters of the sewage to be treated and process parameters of the treatment section, the water inlet parameters including chemical oxygen demand, total nitrogen, total phosphorus and flow rate, and the process parameters including phosphate concentration at the end of the anaerobic tank, nitrate concentration at the end of the anoxic tank, total nitrogen and chemical oxygen demand of the denitrification filter inlet; dynamically calculating and predicting the carbon-nitrogen ratio and the carbon-phosphorus ratio in real time based on the water inlet parameters and the process parameters; determining a carbon source addition point and a first carbon source addition amount based on the predicted carbon-nitrogen ratio, the predicted carbon-phosphorus ratio and a preset effluent water quality standard, the carbon source addition point including at least one of the anaerobic tank, the anoxic tank and the denitrification filter; controlling a carbon source addition device to perform corresponding addition operations based on the carbon source addition point and the first carbon source addition amount, and avoiding excessive COD caused by excessive carbon source through segmented addition and closed-loop control, thereby effectively suppressing secondary pollution.

The invention relates to a continuous flow AOA whole-course anaerobic ammonia oxidation self-enrichment enhanced denitrification system and method, and the system comprises a front anoxic tank, an aerobic tank and a rear anoxic tank which are connected in series, and is filled with a biological filler; the monitoring aeration device comprises an ammonia nitrogen detector and an aeration unit which are connected with the aerobic tank; the reflux device is used for communicating a reflux outlet of the rear anoxic tank with water distribution of the front anoxic tank; and the PID control unit is connected with the monitoring aeration device, the backwashing control valve and the reflux device. The method comprises the following steps: sewage flows into the front anoxic tank, the aerobic tank and the rear anoxic tank; regulating and controlling the reflux ratio to domesticate the biological membrane of the aerobic tank; the ammonia nitrogen concentration of effluent of the aerobic tank is detected in real time through an ammonia nitrogen detector, and the PI D control unit dynamically adjusts the aeration rate of the aerobic tank according to the ammonia nitrogen concentration value and a preset target value, so that the aerobic tank and the rear anoxic tank form an anaerobic ammonium oxidation bacteria self-enrichment environment; the backflow device is used for enabling effluent of the rear anoxic tank to flow back to the front anoxic tank according to a preset proportion, so as to form a whole-process anaerobic ammonia oxidation self-enrichment environment.

The invention discloses a low-temperature sewage deep denitrification treatment method and system based on an AOA process, and relates to the technical field of sewage treatment.The method comprises the steps that multiple types of sensing units are arranged in an anoxic zone and an aerobic zone to obtain multi-zone characteristics, and a low-temperature denitrification collaborative state tensor is constructed through space-time decoupling and correlation analysis; and inputting a denitrification task target, a state tensor and an equipment state into a collaborative decision model, outputting a combined control instruction of gas-liquid distribution, a reflux ratio, aeration intensity and the like through attention fusion, and issuing the combined control instruction to a related unit so as to realize deep denitrification control under a low-temperature condition. The method solves the technical problems of low denitrification efficiency and poor stability caused by the fact that the existing AOA process cannot effectively identify and regulate the coupling denitrification dynamic relationship of multiple reaction intervals under the low-temperature condition, realizes accurate regulation and control of multi-zone denitrification power under the low-temperature condition through multi-zone cooperative control and refined parameter optimization, and improves the denitrification efficiency. The denitrification efficiency and the stability are improved.

The invention relates to the technical field of flue gas pollutant control, and discloses an SCR denitration reactor optimization method based on CFD flow field simulation, and the method comprises the following steps: S1, building an initial CFD model, carrying out reference simulation, and obtaining the performance data of the clean state of a reactor; s2, constructing an ash deposition dynamic evolution model, and performing flow field-ash deposition-geometric coupling simulation in combination with a dynamic grid technology to obtain time-varying operation data; s3, defining and quantifying a time domain performance index of the reactor in a preset period by using the time-varying operation data; and S4, optimizing the design variables by adopting a multi-objective optimization algorithm based on an agent model and taking the time domain performance index as an objective to obtain an optimal design scheme. Through dust deposition dynamic coupling simulation and agent model multi-objective optimization, the long-term operation stability and the comprehensive denitration performance of the SCR reactor under the actual dust deposition condition are remarkably improved, and the optimization design efficiency is greatly improved.

The invention discloses an efficient denitrification method and system for landfill leachate, and the method comprises the following steps: diluting waste molasses, and then adding a compound enzyme preparation containing cellulase, pectinase and alpha-amylase for enzymolysis pretreatment to obtain a pretreatment solution; inoculating the pretreatment liquid with a compound flora containing clostridium butyricum and succinic acid-producing anaerobic spirillum, carrying out anaerobic fermentation, and separating to obtain a liquid carbon source containing acetic acid and propionic acid and fermentation residues; mixing the fermentation residues with waste sugar residues, and performing pyrolysis to prepare biochar; and synchronously adding the liquid carbon source and the biochar into a denitrification reactor, and carrying out denitrification on the landfill leachate. The total nitrogen removal load of the landfill leachate denitrification system is increased by 60% compared with that of a single carbon source process, and the sugar manufacturing solid waste recycling rate gt is achieved; 95%. According to the method disclosed by the invention, the dual goals of efficient denitrification and solid waste recycling are achieved through cooperative treatment of the waste molasses and the waste sugar residues in the sugar manufacturing process.

The invention relates to the technical field of boiler tail gas treatment, in particular to a boiler tail gas multi-pollutant cooperative control system based on linkage of a PLC and a frequency converter. The system comprises a data acquisition module, a PLC control module and a collaborative optimization module. Concentration data of pollutants in boiler tail gas are collected in real time through the data collection module, the boiler tail gas is introduced into the desulfurization and denitrification tower through the inlet induced draft fan, the PLC control module sets driving rules of the inlet induced draft fan through a logic controller of a PLC, the operation frequency of the inlet induced draft fan is dynamically adjusted according to the content of the pollutants in the boiler tail gas, and the desulfurization and denitrification effect of the boiler tail gas is improved. And the collaborative optimization module returns the tail gas which does not reach the standard to a boiler for secondary desulfurization and denitrification, the tail gas which reaches the standard is introduced into a dust removal tower through an outlet induced draft fan, the electric dust removal voltage is adjusted according to the content of ammonia gas in the tail gas, and linkage control over desulfurization, denitrification and dust removal is achieved by taking the minimum operation cost as the target and adopting a genetic algorithm.

The invention discloses an MABR-based railway domestic sewage treatment system and a use method thereof, and relates to the technical field of sewage treatment, the MABR-based railway domestic sewage treatment system mainly comprises a water inlet unit, an anaerobic zone, an anoxic MABR zone, a transition MABR zone, an aerobic MABR filler zone, a sedimentation tank, a filter unit and a clear water output unit which are connected in sequence, and also comprises a sludge external reflux system and a gas supply system; according to the present invention, the respective advantages of the MABR technology and the water treatment filler are fully utilized, the simultaneous nitrification and denitrification are performed to efficiently remove the pollutants, the denitrification is well achieved by using the transition MABR region, and the pollutants are further removed by using the filtration unit, such that the domestic sewage treatment problem of the staff along the railway line is effectively solved, and the high efficiency, the stability and the sustainability of the sewage treatment are achieved. The method has the advantages of high pollutant removal efficiency, no internal reflux of mixed liquid, reduction of sludge yield, energy conservation, carbon reduction, easiness in operation and the like.

The invention discloses a boiler flue gas desulfurization and denitrification device, and relates to the technical field of boiler flue gas treatment.The boiler flue gas desulfurization and denitrification device comprises a tower body, a filler layer is fixedly installed at the top of the tower body, a tower top is fixedly installed at the top of the filler layer, a water tank is fixedly installed on the outer side of the tower body, and a circulating pump is arranged on the water tank; a spraying device is arranged on the water tank, the output end of the circulating pump is connected with the spraying device through a pipeline, a plurality of water spraying openings are formed in the tower top, and the water spraying openings are all communicated with the output end of the spraying device; wherein a stirring device for stirring the filler is arranged on the filler layer, and the flue gas is quickly dispersed, so that the primary desulfurization and denitrification effect is improved, activated carbon particles are continuously stirred, the particles are prevented from caking, full contact between the particles and the flue gas is guaranteed, the reaction time is prolonged, and the desulfurization and denitrification efficiency is improved.

The invention provides a low-carbon modular artificial wetland system and a carbon sink collaborative purification method thereof, and relates to the technical field of artificial wetlands, the low-carbon modular artificial wetland system comprises a modular box body, and a water inlet layer, a carbon sink layer and a purification layer which are sequentially arranged in the modular box body from top to bottom; the water inlet layer is used for filtering suspended matters through coarse sand; the carbon sequestration layer is used for adsorbing carbon dioxide through biochar and carbon sequestration microorganisms, and meanwhile, the carbon sequestration capacity is enhanced through the plant-microorganism synergistic effect; the purification layer is used for purifying a water body through an iron-based phosphorus removal material and a zeolite denitrification filler. The technical problems of low-carbon material selection, carbon sink potential excavation, renewable energy source coupling and greenhouse gas emission inhibition of an existing constructed wetland system are solved, the technical effects of efficient sewage purification and carbon emission reduction are achieved, and a carbon emission reduction closed loop of the whole life cycle is achieved.

The invention discloses a denitrification device for town sewage treatment, and relates to the technical field of sedimentation pools, the denitrification device comprises a sedimentation pool main body, the sedimentation pool main body is provided with a driving mechanism, an oil removal mechanism and a flocculant feeding mechanism, the bottom of the sedimentation pool main body is provided with a sewage inlet pipe and a sewage discharge pipe, and the edge of the inner end surface of the sedimentation pool main body is provided with an overflow plate. A clear water outlet is formed in the side wall of the sedimentation tank main body, an annular reflecting cover and an annular steady flow plate are arranged in the sedimentation tank main body, the driving mechanism comprises a driving motor, a speed reducer, a central shaft pipe and a sludge scraper, the driving motor drives the central shaft pipe through the speed reducer, and the bottom of the central shaft pipe is communicated with a sewage inlet pipe. The invention aims to provide the denitrification device for town sewage treatment, the denitrification device has the advantages of simple structure, convenience in maintenance, high oil removal efficiency and accurate flocculant addition, and the problems of complex equipment, high maintenance cost, poor oil removal effect and agent waste of a traditional secondary sedimentation tank are solved.

The invention provides a concentric circle circulating flow sewage treatment system based on electric strengthening and a control method. The system comprises a concentric circle circulating flow reactor, a microbial electric strengthening unit and an AI driving control unit, a concentric circle double-ring gallery and multi-point water inlet and multi-point backflow achieve a complete mixed flow type flow state of transverse plug flow and longitudinal circulation flow, the concentric circle circulation flow state is coupled with the microbial electric strengthening unit to form gas-liquid-solid-electricity four-phase turbulent flow to break a mass transfer boundary layer, and the contact efficiency and the mass transfer efficiency of sewage and microorganisms are strengthened. The anodes and the cathodes of concentric circle structures are closely arranged to generate electric field gradient to regulate and control spatial distribution of microbial communities, dynamic polarity switching is achieved through an AI system, the reactor is endowed with the self-adaptive capacity for coping with water quality fluctuation, and the sewage carbon, nitrogen and phosphorus removal treatment efficiency is improved in a breakthrough mode.

The utility model provides a low-carbon high-efficiency biochemical system control system. The low-carbon high-efficiency biochemical system control system comprises an internal reflux control module, a carbon source adding module and a precise aeration module, the internal reflux control module is used for refluxing nitrate nitrogen required to be denitrified to the anoxic tank for denitrification; the carbon source adding module is used for giving the current required dosage through online nitrate nitrogen instruments arranged in an anoxic tank and an aeration tank according to dynamic nitrate nitrogen value comparison and variation trend comparison at the tail end of the anoxic tank; and the accurate aeration module reads the real-time numerical value of ammonia nitrogen at the tail end of the aeration tank, performs mean value calculation on the numerical value in each period, performs difference value calculation on the average value of ammonia nitrogen in the current period and the average value of ammonia nitrogen in the last period, and reaches the numerical value of dissolved oxygen through frequency adjustment of an aeration fan to run in a required operation interval. The control method of the low-carbon high-efficiency biochemical system aims to realize low-carbon high-efficiency accurate control of the biochemical system, aeration as required, addition of an external carbon source and control of internal reflux.

The invention relates to the technical field of sewage treatment, and discloses a novel sulfur autotrophic denitrification filter material and a preparation method and application thereof.The particle size of the filter material is 3.0-4.0 mm, and the filter material is prepared from 40%-45% of a composite sulfur source, 70 + / -2% of sulfur and 30 + / -2% of sodium thiosulfate, 30%-35% of modified ceramsite, 50-100 [mu] m / 200-300 [mu] m of bimodal pore size and 8%-10% of a conducting medium. The ratio of graphene to biochar is 3: 1), a buffer medium (5%-7%, Fe2O3 (52% + / -2%), CaCO3 (31% + / -2%) and MgO (17% + / -2%), a binder and an inert filler. The preparation method comprises the steps of raw material pretreatment, mixing granulation, stepped calcination, gradient impregnation, buffer medium directional loading, post-treatment and the like. The filter material solves the problems of by-product accumulation, insufficient microbial adhesion, large pH fluctuation and blockage of a traditional filter material through gradient sulfur release, a three-dimensional electron transfer network, a multistage pore anti-blockage design and a composite pH buffer system, is suitable for sewage denitrification treatment, and is high in denitrification efficiency and good in stability.

The invention relates to the technical field of energy utilization and energy conservation and emission reduction, and discloses a sludge incineration tail gas treatment system and an energy storage heat exchanger. The system comprises a tail gas purification module, a carbon capture and solidification module, a circulating power generation module, an air dehumidification heat pump module and a cascade energy storage module. The tail gas purification module is used for sequentially carrying out particulate matter filtration, desulfurization, electrostatic dust collection and denitration treatment on tail gas discharged by the incinerator; the carbon capture and solidification module is used for collecting CO2 in the tail gas through a temperature swing adsorption and low-temperature cooling technology; the circulating power generation module is used for converting low-grade waste heat in the tail gas into electric energy through an organic Rankine cycle technology; the air dehumidification heat pump module is used for dehumidifying and preheating air entering the incinerator; the stepped energy storage module is used for conducting graded recovery and management on waste heat of different temperature zones in tail gas in the purification process. According to the system, various pollutants in the tail gas are efficiently removed, and waste heat of different temperature grades is recycled and utilized in a graded mode.

The invention discloses a temperature control method for low-temperature high-NOx-concentration flue gas denitration in the nuclear industry, and relates to the technical field of flue gas denitration control. According to the method, flue gas temperature time sequence distribution, NOx concentration gradient and environment radiation intensity data are integrated through a space-time alignment algorithm, a synchronous data matrix representing a system coupling state is generated, then a temperature and efficiency response curved surface is established, a high-efficiency temperature area and an inactivation risk area are dynamically divided through fuzzy logic control, and an optimal temperature regulation and control threshold value is recognized. The drift effect of quantitative radiation on the surface temperature of the catalyst is analyzed through regression, a quantitative relation model of radiation dose and temperature zone deviation is established, and real-time correction of anti-radiation compensation parameters is achieved. And finally, optimizing the multi-objective cost function by adopting a non-dominated sorting genetic algorithm, and obtaining dynamic balance between the maximum NOx conversion rate and the minimum temperature fluctuation. And multi-parameter coupling control of a temperature field and a radiation field is realized, and the denitration efficiency stability under a low-temperature condition is remarkably improved.

The invention belongs to the technical field of sewage treatment, and discloses a two-stage MABR-based efficient denitrification system, method and application, the system comprises an MABR-PN / DN reactor, an MABR-PN / A reactor, a peristaltic pump, an aeration hollow fiber membrane module, a carrier, an aeration pump, a gas flowmeter, a pressure gauge and a liquid flowmeter, and the MABR-PN / DN reactor and the MABR-PN / A reactor are arranged along the vertical direction. According to the system, the series design of the MABR-PN / DN and the MABR-PN / A is utilized, the adverse effect of organic matter in sewage on anaerobic ammonia oxidation treatment of high-concentration ammonia nitrogen wastewater is reduced, nitrate nitrogen generated by the MABR-PN / A flows back to the first-stage MABR-PN / DN to achieve denitrification, the denitrification limitation of a single reactor and a single denitrification path is broken through, and the overall total nitrogen removal rate of the system is higher than 90%.

The invention relates to the technical field of flue gas denitration, and discloses an efficient dust and nitrate integrated SCR denitration system and method in a high-temperature and low-dust environment. A lower high-temperature dust removal unit containing a gradient three-dimensional porous metal fiber filtering element and an upper SCR denitration reactor located at the downstream of the lower high-temperature dust removal unit containing a multi-layer vanadium-titanium honeycomb type catalyst module are arranged in the upper SCR denitration reactor; the ammonia spraying module sprays ammonia to the upstream or the interior of the SCR reactor; and the intelligent control module controls the ammonia spraying and dust removal unit to remove dust, comprises a catalyst characteristic identification sub-module, a working condition disturbance prediction sub-module and a collaborative optimization control sub-module, and realizes an optimization decision of a final ammonia spraying instruction. High-temperature dust removal and SCR denitration are integrated in the integrated box body, so that the compactness of the system structure is realized; front efficient dust removal provides a clean flue gas environment for the catalyst, the service life of the catalyst is effectively prolonged, and the denitration efficiency is guaranteed; and the intelligent control module ensures the accuracy and self-adaption of ammonia spraying operation, and the removal rate of nitrogen oxides and the operation economy are remarkably improved.

The invention relates to the technical field of sewage treatment, and particularly provides a method and a system for realizing beneficiation wastewater N, N-diethyldithiocarbamate-C-N-S synergistic oxidation-reduction coupling treatment by an MABR oxygen layering process. According to the method and the system, a time sequence dissolved oxygen (DO) dynamic regulation and control strategy is innovatively developed: through periodic / pulse type switching anaerobic-hypoxia-aerobic conditions, oxygenolysis and ammonification reaction of N, N '-diethyldithiocarbamate are intensified directionally, and toxicity inhibition of intermediate products on functional bacteria is relieved. Based on the strategy, the system can accurately utilize biological membrane oxygen gradient spatial distribution in a single MABR reactor to realize a cascade reaction of sulfur oxidation-ammonification-aerobic nitrification-anoxic denitrification of ethyl sulfur nitrogen; or aiming at high-concentration diethyldithiocarbamate (gt; 50 mg / L) is coupled with a front anaerobic reactor, and ammoniation detoxification and denitrification nitrogen removal are enhanced.

The invention relates to a tail gas denitration system and method for an ammonia fuel ship, an ammonia supply pipeline of an ammonia fuel engine in the system adopts a double-wall pipe, the inner pipe of the double-wall pipe is used for conveying liquid ammonia, and the outer pipe of the double-wall pipe is connected with an ammonia treatment system through a fan so as to suck leaked ammonia gas to the ammonia treatment system; the ammonia treatment system is connected with the buffer tank through a fan and is used for conveying the discharged gas to the buffer tank after pressurizing the discharged gas through the fan; the ammonia treatment system is connected with a reducing agent tank through a pump; the reducing agent tank receives ammonia water of the ammonia treatment system through the pump; the SCR reducing agent supply system is connected with the reducing agent spray gun through the reducing agent tank and the buffer tank and used for conveying the discharged gas to the reducing agent spray gun through the SCR reducing agent supply system to assist in atomizing ammonia water. According to the ammonia fuel ship tail gas denitration system and method, ammonia water generated in the ammonia treatment system is used as a reducing agent of the SCR system, and discharged gas of the ammonia treatment system is used as auxiliary atomization gas of the reducing agent, so that waste is recycled, and the denitration efficiency is improved.

The invention relates to a lake sediment reduction bacterium which is classified and named as bacillus amyloliquefaciens WP02, the preservation number is CCTCC (China Center for Type Culture Collection) NO: M2020696, and the lake sediment reduction bacterium is preserved in the China Center for Type Culture Collection. The invention relates to an application of a lake sediment reduction bacterium in sediment denitrification, phosphorus uptake and quality degradation. The method has the beneficial effects that the immobilized microbial agent obtained by respectively embedding and adsorbing lake sediment reduction bacteria can effectively reduce sediment organic matters, reduce sediment total nitrogen and absorb phosphorus in overlying water, namely effectively perform denitrification, phosphorus absorption and quality degradation on the sediment, and the microbial agent can improve the oxidation reduction potential of the sediment and reduce the pollution of the sediment. And the method has important significance and application value in the aspect of maintaining the ecological balance of the water body, and has the characteristics of high in-situ remediation efficiency, small environmental disturbance and no secondary pollution compared with a physical and chemical remediation method.

The utility model aims to provide the nitrogen and phosphorus removal filter with the ozone micro-ecological environment, which is used for removing nitrogen and phosphorus through microorganisms and treating sewage through ultraviolet sterilization. A water inlet is formed in the barrel body, and a water outlet is formed in the barrel body. The mechanical filtering module is arranged on the barrel body, is connected with the water inlet and is used for filtering and primarily treating the sewage; the ozone microorganism module is arranged between the mechanical filtering module and the barrel body and is communicated with the mechanical filtering module, an anaerobic zone, a facultative oxygen zone and an aerobic zone are formed in the ozone microorganism module, and nitrification and denitrification reactions are fully carried out for recirculating aquaculture and nitrogen and phosphorus removal treatment of aquaculture tail water; and the ultraviolet module is arranged on the outer side of the barrel body and is used for sterilizing and disinfecting the culture water or the culture tail water. The utility model is applied to the technical field of nitrogen and phosphorus removal filters.