261 results about "Contamination control" patented technology

The invention relates to the technical field of atmospheric environment monitoring, in particular to an atmospheric pollution source tracking and early warning system based on deep learning, which comprises a multi-source data acquisition layer for acquiring multi-dimensional data of atmospheric pollutant concentration, weather, geography and the like through multi-element equipment such as satellite remote sensing and ground sensors; the data preprocessing layer completes data cleaning by using a statistical method and a machine learning algorithm, and realizes heterogeneous data standardization processing through feature extraction, multi-source integration and space-time alignment, and the deep learning model layer realizes heterogeneous data standardization processing by means of a space-time convolutional neural network, a graph neural network and a long-short term memory network in combination with a space-time attention mechanism. The traceability analysis layer is combined with a back diffusion algorithm and a geographic information system to position a pollution source and generate a thermodynamic diagram. And the early warning decision-making layer sets threshold early warning through transfer learning of the adaptive area, and generates an optimal pollution control scheme based on reinforcement learning.

The invention discloses a lake eutrophication biological treatment system and a dynamic method based on multi-dimensional cooperative regulation and control. Exogenous pollution control, layered biological manipulation and artificial intelligence dynamic feedback are fused, and the method is particularly suitable for moderate eutrophication water bodies with nitrogen and phosphorus exogenous input not completely cut off. According to the gradient filling structure, macromolecular organic matters are intercepted by using shallow coarse particles, and middle / fine particles specially attack phosphate adsorption, so that graded removal of pollutants is realized; fish ingestion and benthic organism disturbance have a synergistic effect, secondary pollution of aquatic plant litter degradation to a water body is reduced, transfer of nitrogen and phosphorus from the water body and plant litters to animal objects is promoted, and the coupled system can reduce the phosphorus release rate of bottom mud, improve the stability of FePO4 precipitation and synchronously degrade sulfides and organic matters in the bottom mud; electric shock damage to benthic organisms is avoided through the micro-current intensity, sulfur metabolites can be used as a nutrient source of submerged plants, and biological self-purification and resource utilization of eutrophic water are achieved.

The invention discloses a method and system for evaluating the influence of long-term fertilization on rice field soil heavy metals, and the method comprises the steps: obtaining rice field soil data through a sensor, and obtaining a standardized soil physicochemical property data set and a heavy metal content data set; according to the standardized soil physicochemical property data set and the heavy metal content data set, obtaining a feature vector set reflecting correlation between soil physicochemical properties and heavy metal behaviors; aiming at the feature vector set, obtaining a prediction model for representing the influence of the fertilization mode on the heavy metal mobility; if the heavy metal effective state content output by the prediction model exceeds a preset bioavailability threshold value, classifying the soil physicochemical property data set, judging the influence weight of the soil pH value and the organic matter content on the cadmium mobility, and obtaining the classified soil environment risk grade; and according to the classified soil environment risk levels, obtaining comprehensive rice field soil heavy metal pollution evaluation indexes. The pertinence and effectiveness of pollution control are remarkably improved.

The invention provides an intelligent maintenance cleaning device for nanofiltration membrane pollution control and a method thereof, and solves the problems of low maintenance cleaning efficiency, poor adaptability of cleaning parameters and pollution conditions and frequent chemical cleaning of an existing nanofiltration system. Belongs to the technical field of membrane pollution control. According to the invention, the filtering system, the cleaning system and the intelligent decision-making module are integrally designed, so that the closed-loop control of the whole process of real-time monitoring, pollution identification, intelligent decision-making and automatic cleaning of the running state of the nanofiltration membrane is realized. The cleaning effect gating memory neural network model is used as a membrane pollution prediction model, membrane pollution can be accurately predicted, and key cleaning nodes can be identified. The optimal membrane cleaning parameters are generated by adopting a non-dominated sorting genetic algorithm, the usage amount of chemical agents and the cleaning cost are reduced, and the membrane pollution control effect is improved. The invention is applicable to the field of drinking water treatment.

The invention relates to the technical field of data processing, and discloses a rainfall runoff pollution early warning system and method.The system comprises a sample analysis module, a pollutant model construction module, a water quality prediction module, an early warning signal generation module and a pollution control module; carrying out physicochemical property analysis on the pavement sediment sample and the rainfall runoff sample of the service area to obtain pollutant concentration data and pollutant composition data; constructing a pollutant migration and transformation model based on dynamic changes of pollutants in the pollutant concentration data and the pollutant composition data in the runoff process; hydrology and hydrodynamic force of the service area are predicted based on the pollutant migration and transformation model, and runoff water quality change trends under different rainfall scenes are obtained; when the water quality prediction index in the flow water quality change trend exceeds a pollution early warning threshold value, a pollution early warning signal is generated; the pollution early warning signal is pushed to a management terminal, and a corresponding runoff pollution control measure is triggered; the rainfall runoff pollution early warning method can improve the accuracy of rainfall runoff pollution early warning.

The invention provides a cyanide-containing wastewater resource recovery and cyclic utilization method, and belongs to the technical field of environmental protection and water treatment. According to the method, firstly, copper is collected through sulfuration under the weak acid condition with the pH being 5-6, so that a copper-cyanogen complex ([Cu (CN) 43-]) in wastewater is converted into a mixed material of copper sulfide (CuS) and cuprous cyanide (CuCN), and primary recovery of copper is achieved; and then, adding a pH regulator 2 to control the pH of the reaction system to be 9-11, adding a separation agent to control the ORP of the reaction system to be-400mV to-200mV, and carrying out a separation reaction. In the process, cuprous cyanide reacts with free cyanide (CN <->) to generate a soluble copper-cyanogen complex, and copper sulfide is retained, so that cuprous cyanide is accurately separated from the copper-containing material, the content of cyanide in the material is reduced, and the obtained copper-containing material meets the requirements of industrial product quality standards and pollution control standards; the problems that in the prior art, the cyanide content in the copper-containing material obtained by recycling copper from the cyanide-containing wastewater exceeds the standard, and the environmental risk is high in storage, transportation and comprehensive utilization are solved.

The invention relates to the technical field of environmental monitoring and pollution control, in particular to a dust and noise online control system, which comprises a monitoring module, which is used for acquiring data of dust concentration C, particle size D, dust raising position P, noise level N and frequency F through video monitoring equipment and various sensors; the data communication module is responsible for transmitting the data to the central control system; the central control system constructs a fuzzy control rule base according to the dust-related data, adjusts parameters of dust removal equipment in combination with a PID algorithm, and controls noise reduction equipment by adopting an adaptive filtering algorithm according to noise data; the risk assessment and early warning optimization module uses a risk assessment model to calculate a risk grade R and performs graded early warning; the governance execution module comprises a dust hood, a sprayer and noise reduction equipment and carries out dust and noise governance according to an alarm, and the air volume regulation module regulates the air volume of a dust suction port through a neural network algorithm by means of feedback of a sensor on a regulation valve; the invention aims to solve the problems of effective monitoring, precise treatment and scientific early warning of dust and noise.

The invention discloses an intelligent intercepting well optimization control method based on overflow pollution load prediction, and the method comprises the following steps: S1, building a drainage pipe network model according to the data of a pipe network communicated with all intercepting wells, and completing the parameter calibration of hydrology and water quality in rainy days; s2, forming a control strategy scheme library containing all the intercepting wells; s3, a machine learning model is used for training, and the machine learning model of overflow pollution loads and decision variables under different rainfall conditions is established; s4, constructing an overflow pollution load value machine learning model under different rainfall conditions, and predicting an overflow pollution load minimum value under different rainfall sessions; and S5, based on the minimum value of the overflow pollution load, predicting the optimal control strategy of the control variables of all the intercepting wells by using the machine learning model of the overflow pollution load and the decision variable under different rainfall conditions. By optimizing the control strategy of the catch basin, overflow pollution control of the drainage system is achieved, and the operation efficiency of a pipe network in rainy days is improved.

The invention provides a bacteriostatic proppant technology based on a palladium oxide-reduced graphene oxide composite material, aiming at the problem of hydrogen loss caused by microbial activity in a hydrogen storage bank of an exhausted gas reservoir. A PdO (at) rGO composite material functionally modified by lead ions (Pb < 2 + >) is loaded on the surface of a porous ceramsite carrier to form an adsorption-inactivation-blocking synergistic antibacterial network; precise laying of the proppant in a crack network is achieved through the end sand removal technology, hydrogen consumption is reduced, and an efficient, economical and environment-compatible innovative solution is provided for biological pollution control of the underground hydrogen storage library.

The invention relates to a calcium-based difunctional composite material and a preparation method and application thereof, the calcium-based difunctional composite material is applied to pollution control in a sludge-low-rank coal co-pyrolysis process, the calcium-based difunctional composite material is composed of Ca2Fe2O5 and an adsorptive material, and the mass ratio of Ca2Fe2O5 to the adsorptive material is 1: 1. According to the calcium-based bifunctional composite material, the fixation rate of sulfur in pyrolytic carbon is remarkably increased, conversion of heavy metal to a more stable form is facilitated, and the leaching capacity and potential ecological risks of the heavy metal are remarkably reduced.

The invention discloses a preparation method of a catalytic oxidation peroxyacetic acid self-release oxygen membrane and application thereof in the field of water treatment, and belongs to the technical field of water pollution control. The invention aims to solve the problems of unbalanced release rate and oxidation activity, self-decomposition loss of an oxidant, secondary pollution risk, and insufficient dynamic cleaning and long-acting anti-pollution capability in the traditional oxygen release technology. According to the invention, peroxyacetic acid is taken as an oxidizing agent, and a self-oxygen-release membrane for catalytic oxidation of peroxyacetic acid is taken as a catalyst, so that an oxygen-release membrane system is constructed, the water treatment efficiency and membrane performance are remarkably improved, the operation energy consumption of the system is greatly reduced, and an innovative solution is provided for development of an intelligent water treatment technology. The method has wide application scenarios, and is suitable for different water quality and treatment requirements. The high-efficiency degradation capability on pollutants such as antibiotics and endocrine pollutants is realized, the high-efficiency interception on complex pollutants such as humic acid, protein and colloid is realized, and the high-efficiency degradation capability is suitable for water supply sources, municipal sewage, industrial wastewater and reclaimed water treatment scenes.

The invention discloses a pollution emission monitoring and early warning method based on physical prior and information value driving, and relates to the technical field of environment monitoring and pollution control, and the method comprises the following steps: collecting production side certificate data, executing time alignment and self-calibration drift removal, and constructing a standardized multi-source database; judging whether a heat island effect occurs or not, and if yes, collecting volume heat capacity, solar irradiance and heat island intensity data of a single building; according to the method, the heat island effect is introduced to judge and generate a new time-space diagram network, real-time heat island intensity changes caused by building materials and solar irradiation can be dynamically captured, and building wind field and plume data are accurately corrected. The problem that a conventional method cannot adapt to irregular fluctuation of vertical wind shear caused by the real-time heat island effect is solved, the pollution plume low-altitude compression phenomenon caused by the heat island effect is effectively corrected, and the monitoring direction is always aligned with the real diffusion path of pollutants.

The invention provides a proton coupling electron transfer method for resource removal of organic pollutants. The method comprises the following steps: S1, generating high-valence metal oxygen species with selective oxidation characteristics in situ; s2, determining optimal generation conditions of high-valence metal oxygen species; s3, determining an optimal condition for initiating a proton coupling electron transfer reaction by the high-valence metal oxygen species; s4, determining a key intermediate of a proton coupled electron transfer reaction initiated by the high-valence metal oxygen species; and S5, removing the organic pollutants in a recycling manner based on a proton coupling electron transfer method. By utilizing the method, the conversion of an organic pollutant water treatment mode from pollution control to resource recovery can be realized, a sustainable path is provided for resource recovery of organic pollutants, and low-carbon water purification can be realized.

The invention relates to the technical field of river ecological toughness evaluation, and discloses a river ecological toughness evaluation method based on a water quality target and flood season pollution control. The method comprises: setting a water quality target of a target water area; collecting ecological research data of the target water area in the flood season, and dividing the ecological research data into historical research data and current research data according to time; performing statistical analysis on the historical research data to obtain first feature data of each flood season; training a neural network model based on all the first feature data, and generating a prediction model for estimating the water quality recovery time; and performing statistical analysis on the current research data to obtain second feature data, inputting the second feature data into the prediction model, obtaining estimated time for recovering the current initial water quality to a water quality target, and generating a river ecological toughness value according to the estimated time. The method can accurately predict the water quality recovery time under flood season pollution control, scientifically quantify the river ecological toughness, and improve the efficiency of river ecological toughness evaluation.

The invention relates to a reverse osmosis membrane pollution control method based on green biological scale inhibition, which is especially suitable for reverse osmosis membrane pollution treatment in an industrial wastewater zero discharge system. The method comprises the following steps: regulating and controlling the composition of organic components of inlet water through a sand filtration pretreatment unit, and directly interfering the nucleation and crystallization processes of inorganic scaling on a membrane surface by utilizing naturally enriched microbial communities and extracellular polymeric substances thereof in a sand filtration process without adding a fungicide or a chemical scale inhibitor, so as to form a loose and reversible pollution layer structure. The method effectively reduces the scaling rate of inorganic salts such as calcium carbonate and the like, inhibits membrane surface biological pollution, delays compaction of a pollution layer, improves the membrane flux retention rate, prolongs the membrane operation cycle and reduces the cleaning frequency. Compared with an existing traditional physical or chemical pretreatment method, the natural scale inhibition effect of an ecological system in the sand filtration unit is fully utilized, and the method has the remarkable advantages of being low in operation cost, environmentally friendly, high in adaptability and the like.

The invention relates to the field of environmental engineering and technology, and discloses a coprocessing method for coking wastewater based on MBR (membrane bioreactor) technology, which sequentially comprises the steps of pretreatment, biological enhancement treatment, nitrogen and phosphorus removal treatment, sludge regulation and control treatment, membrane pollution control treatment and circular treatment, and comprises the following steps: introducing coking wastewater into a grating and a grit chamber; performing pretreatment to remove large-particle impurities; in the biological enhancement and nitrogen and phosphorus removal stage, a microbial agent is added to regulate and control the reaction environment so as to improve the pollutant degradation efficiency; accurate management and control of sludge performance and membrane pollution are realized by using an online monitoring technology; finally, sludge, cleaning wastewater and the like generated in all links are collected in a classified mode, the sludge is subjected to resource utilization after stabilization treatment, the cleaning wastewater is reused in the pretreatment stage, and a closed-loop treatment system is formed; through the steps, the problems of incomplete removal of COD (Chemical Oxygen Demand) and ammonia nitrogen, low removal rate of total nitrogen and total phosphorus, sludge bulking, fast membrane pollution and high risk of secondary pollution in the traditional process are effectively solved.

The invention relates to the technical field of water pollution control and treatment, and particularly discloses electroplating wastewater heavy metal ion treatment equipment. The cathode bar is sleeved with the isolation cover provided with the multiple communicating grooves at intervals in the circumferential direction, and the annular mounting base with the lifting mechanism is slidably mounted outside the isolation cover, so that the clearing mechanism in the mounting base can dynamically clear sediments in the length direction of the cathode bar. The design of the communicating groove of the isolation hood not only allows electroplating wastewater to be in full contact with the cathode bar, but also restrains sediments in an area in the groove by limiting a fluid diffusion path, so that disordered diffusion of metal particles in the electrolytic tank is effectively prevented. And the lifting motion of the mounting seat is matched with the clearing mechanism, so that sediments on the surface of the cathode can be continuously stripped in the electrolysis process, the efficiency loss caused by shutdown clearing in a traditional aeration method is avoided, meanwhile, the secondary pollution risk of suspended sludge is reduced, and continuous and efficient recovery of heavy metal ions is realized.

A method for contamination control when growing yeasts is provided. Bacterial contamination is controlled by using urea as the primary nitrogen source while simultaneously limiting the amount of nickel available to contaminating bacteria. Bacteria require nickel as a cofactor for urease enzymes in order to use urea for growth while yeasts do not require nickel as a cofactor for any enzymes. Nickel is limited by using metals in heat exchangers that do not leach nickel. Ethyl carbamate is limited by using a carbon / nitrogen ratio that consumes all urea during fermentation. After fermentation completes, yeast is recycled using centrifugation, enabling use of high concentrations of yeast to reduce fermentation time from 48 hours to 12 hours and to eliminate bacterial contamination from growth on free amino nitrogen.

The invention discloses a method for repairing alkaline cadmium-polluted farmland in arid and semi-arid regions and application of the method, and belongs to the technical field of soil repairing. According to the method, the alkaline cadmium polluted farmland soil in the arid and semi-arid areas is subjected to deep ploughing treatment, and organic materials are applied to improve the soil fertility and the environment and health quality. On the basis, an intercropping planting system suitable for the arid and semi-arid land area is constructed, low-cadmium-accumulation grain crops and high-cadmium-accumulation plants are reasonably selected according to the ecological conditions and crop characteristics of the area, and an intercropping combination of low-absorption grain crops and enriched economic crop plants is formed. According to the system, organic unification of source reduction of heavy metal pollution in soil, pollution control in the planting process and continuous and safe utilization of the farmland is achieved, the dual goals of pollution remediation and farmland production are taken into account, and pollution reduction and collaborative improvement of economic benefits are achieved; and a feasible technical path is provided for ecological restoration of alkaline heavy metal polluted farmlands in arid and semi-arid regions.

The invention belongs to the technical field of urban environment engineering, and particularly relates to an urban temperature and humidity and pollution control system and method based on a water sprinkling mechanism, the system comprises a control system, the water sprinkling mechanism and an environment temperature and humidity detection mechanism, and the method comprises the steps of a, aiming at a treatment mode I of too high environment temperature and normal humidity; b, a second treatment mode for'over-high environment humidity and normal temperature '; c, a third treatment mode for'over-high environment temperature and humidity '; d, a fourth treatment mode for'normal temperature and humidity but overproof environmental pollution '; the invention further discloses a method for measuring the pothole terrain and recovering accumulated water. According to the invention, temperature and humidity imbalance and environmental pollution caused by the heat island effect can be effectively treated.

The present invention relates to a composite modified zeolite for efficiently solidifying fly ash heavy metals, a preparation method and an application thereof. The composite modified zeolite is a base-phosphate-carbonate composite modified zeolite, and its pH is 7.2-9.1. The surface is loaded with 31%-50% phosphorus and 12%-36% carbon by mass fraction, wherein the phosphorus is loaded in the form of a phosphate group and the carbon is loaded in the form of a carbonate group; the phosphate group includes PO4 3‑ , the carbonate type includes -CO3 2‑ Using this composite modified zeolite as the immobilization and stabilization material, adding 1% of the fly ash mass to the treatment once can reduce the leaching concentrations of lead, cadmium, and zinc in the fly ash to below the limit specified in the "Standard for Pollution Control of Municipal Waste Landfill" (GB 16889-2008). It can be used for the solidification and stabilization of heavy metals in incineration fly ash, especially lead, cadmium, and zinc in the solidified and stabilized fly ash.

The invention discloses a water quality purification system based on a heterogeneous catalytic material and an ecological floating bed. The water quality purification system comprises a floating bed device, a purification device, a fixing device and a water moving trolley, the floating bed device comprises a floating bed carrier and aquatic plants planted on the floating bed carrier; root systems of the aquatic plants extend into the water, and microorganisms are attached to the root systems; the purification device is arranged on the floating bed carrier, is in contact with water flow and comprises a plurality of purification assemblies distributed on the floating bed carrier at intervals, and each purification assembly comprises a purification bag suspended on the floating bed carrier and a heterogeneous catalytic material loaded in the purification bag; the fixing device is arranged on the floating bed carrier and fixes the floating bed carrier on the water surface of a target area; the water moving trolley is connected with the floating bed carrier and drives the floating bed carrier to the water surface of the target area; according to the water quality purification system disclosed by the invention, a material-plant-microorganism three-in-one synergistic purification framework is constructed, and the potential of an ecological floating bed in the aspects of sustainable pollution control and phosphorus resource recovery is remarkably enhanced.

The invention belongs to the technical field of environmental monitoring and pollution control, and particularly relates to a cross-medium pollution traceability system based on fusion of water, sediment and atmospheric settlement, and the system comprises the following components: a sampling module which is used for synchronously collecting a water sample, a sediment sample and an atmospheric settlement sample of a target water area in a preset time window; the detection module is connected to the sampling module and is used for determining the carbon stable isotope delta 13C of the water body sample; the data preprocessing module is connected to the detection module and is used for executing a quality control process, data standardization and abnormal value processing; and the Bayesian network calculation module is connected to the data preprocessing module and is used for establishing a hierarchical hybrid model taking the contribution rate of the pollution source as a hidden variable. Through three-medium synchronous sampling of water, sediment and atmospheric sedimentation and Bayesian posterior interval estimation, traceability errors caused by instantaneous discharge and background fluctuation are significantly inhibited, and conclusion robustness is improved.

The invention discloses a membrane pollution control method, and belongs to the field of membrane pollution control. Comprising the following steps: S1, online monitoring and data acquisition; S2, intelligent pollution identification and trend prediction: inputting a multi-dimensional process feature matrix into an intelligent self-learning neural network, and training and identifying pollution types; and predicting a future pollution trend according to an identification result to obtain a pollution development trend curve. S3, dynamic regeneration strategy generation: generating a dynamic regeneration strategy according to the pollution development trend curve; the dynamic regeneration strategy comprises backwashing time, backwashing flow, regeneration frequency and regenerant concentration adjustable parameters; and issuing the dynamic regeneration strategy to a control system for execution to realize real-time intervention and optimization control of membrane pollution. And S4, performing self-learning tuning and closed-loop feedback. And S5, long-term stability maintenance. According to the invention, the dual goals of flux recovery rate improvement and energy consumption reduction are realized while the pollution removal effect is ensured.

The invention belongs to the technical field of pollution control, and relates to a soil pollution treatment method and system utilizing microbial remediation, and the method comprises the following steps: obtaining target remediation functional microbial agent genome and to-be-remedied site native microbiome metagenome data, and constructing a biological information basic data set; processing the data, and constructing an interaction network model containing microbial inoculum and native species nodes based on metabolic complementarity and ecological niche overlapping degree simulation calculation; analyzing the network topology structure to screen a key native co-generation node set, and generating a growth promotion demand map; determining a targeted metabolism regulation factor with targeted selectivity based on atlas reverse matching, and generating a targeted signal instruction; executing the instruction and putting a microbial agent, activating a synergistic node in situ and coupling with the microbial agent to construct a degradation function network; the method solves the problem that the colonization efficiency of the exogenous functional microbial inoculum is not high due to lack of accurate regulation and control on the native microbial community.

A gripping gripper (30), particularly suitable for controlling contamination of a surface (112) by smear, comprises: a gripper body (22); a mechanical interface (18) for its connection to a modular effector (16) of a robotic arm (12); two jaws (24); a transmission mechanism (26) for connecting the jaws (24) to the gripper body (22) and converting commands from the mechanical interface (18) into movements of the jaws (24) between a mutually separating configuration and a mutually approaching configuration; two pads (32, 34) mounted on the jaws (24) by means of support mechanisms (38) configured to allow movement of the pads (32, 34) relative to the jaws (24) along trajectories parallel to each other, independently of the position of the jaws (24);and elastic return means (36) configured to stress each of the pads (32, 34) towards an extreme position on its trajectory, on the same side. Figure for the abbreviation: Figure 7;

Disclosed is a method and system for the mitigation of risk of exposure to contaminants and providing information thereof. The method and system thereby follow the National Institute for Occupational Safety and Health (NIOSH) Hierarchy of Controls to implement a method and system to optimize safety guidelines and increase mitigation effectiveness. The method includes providing or using an existing air moving unit, mounting sensors for the continuous measurement of contaminants, flushing the enclosed area prior to and after occupancy for a specific time, filtering, diluting the enclosed area during occupancy, pressurizing for contamination control, maintaining humidity between 40% and 60%, providing ultraviolet germicidal irradiation to destroy and deactivate nuclear material in contaminants, cleaning, adjusting operational parameters between energy conservation mode and pandemic mode, and providing a display having information thereof about the enclosed area including the attributes and characteristics continuously monitored by sensors.

The invention relates to the technical field of solid waste treatment and resource utilization, and particularly discloses a waste incineration fly ash harmless treatment method based on water washing-sulfide cooperative circulation. The method comprises the following steps: firstly, carrying out crushing, drying and sieving pretreatment on the fly ash; secondly, carrying out water washing desalination and detoxification on the fly ash by adopting deionized water under the conditions of optimized liquid-solid ratio, water washing temperature, time and stirring rate, and carrying out solid-liquid separation to obtain water-washed fly ash and water washing liquid; then adding a sodium sulfide solution with a certain concentration and proportion into the water washing liquid, and removing heavy metal ions through reaction, centrifugation and membrane filtration to obtain purified water washing liquid; and finally, the residual sulfur ions in the purified water washing liquid are partially recycled to the untreated water washing liquid, so that closed circulation of the sulfur ions and medicament saving are realized. By means of the method, the leaching concentration of Cl and heavy metal in the fly ash can be remarkably reduced, the fly ash can meet the hazardous waste landfill pollution control standard (GB18598-2019), and the treated washing liquid can reach the first-level emission limit value of the integrated wastewater emission standard (GB8978-1996). Compared with a traditional solidification / stabilization method, the method has the advantages of being high in desalination rate, high in heavy metal removal efficiency, low in energy consumption, low in operation cost, near-zero in emission and the like, and an efficient, economical and environment-friendly solution is provided for harmless treatment and resource utilization of the waste incineration fly ash.

The present application relates to the field of non-ferrous smelting solid waste resource utilization and pollution control technology, and specifically discloses a zinc oxide fume treatment control system and method. The system comprises a raw material slurry module, a first-stage leaching alkali control module, a second-stage leaching temperature control module and a calcification arsenic precipitation control module. In the first-stage leaching process, the efficient arsenic leaching balance point is dynamically captured according to the arsenic and zinc leaching rate variation curve with pH, and the leaching agent addition amount is accurately controlled; in the second-stage leaching, the heating temperature is real-time regulated according to the dissolved zinc rate; before the calcification arsenic precipitation, oxidation treatment is carried out, the oxidation-reduction potential is controlled based on the trivalent arsenic oxidation efficiency, and the lime milk addition amount is dynamically adjusted according to the arsenic concentration and zinc content in the precipitate during the arsenic precipitation process. The present application realizes efficient selective leaching and stable solidification of arsenic, effectively inhibits the loss of zinc, and has the advantages of high separation efficiency, high resource recovery rate and the like.

This invention provides a photovoltaic-powered microbial fuel cell constructed wetland system, relating to the field of water pollution control. The system consists of a photovoltaic power supply module, a pulse modulation unit, a mode switching unit, a microbial fuel cell constructed wetland body, an auxiliary anode module, and an electrically isolated stimulation electrode pair. Through photovoltaic power supply and low duty cycle intermittent constant current pulse modulation, it can maintain stable operation for more than 72 hours under no-light conditions. Relying on the time-sharing pulse output of the mode switching unit, electrochemical oxidation of recalcitrant organic matter is achieved through the auxiliary anode. The electroisolated electrode pair stimulates the metabolism of electrogenic bacteria with a non-contact alternating electric field, solving the problems of unstable power supply and difficulty in balancing oxidation efficiency and bacterial activity in off-grid scenarios, thus improving wastewater treatment efficiency and long-term operational stability of the system.