39 results about "Source reduction" patented technology

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 application discloses a kind of green and efficient pig breeding method and system, belong to the technical field of animal husbandry breeding.The method of the application includes four steps of preparation, management in the period of nursing and fattening, processing in the period of leaving and cleaning, resource recycling and facility maintenance.By spraying photocatalysis-microorganism composite functional coating on the surface of pig house, combined with AI visual dynamic precise feeding, source reduction is realized;By using bionic electronic nose and ventilation, deodorization system linkage, process intelligent control is realized;By using electrochemical circulating water washing, waste heat coupling biological filter or shared deodorization container, end efficient purification and small and medium field adaptation are realized;Finally, wastewater and waste material are recycled.The application solves the problems of unstable effect, high energy consumption, low intelligent degree, poor adaptability of small and medium field of existing odor control technology, and has the advantages of source reduction precision, process control in situ, end treatment closed loop, operation intelligence and easy popularization of small and medium field.

The invention discloses a flue gas deacidification agent performance evaluation system and method, and belongs to the technical field of environmental protection. The system comprises a flue gas input module, a medicament spraying module, a reaction module and a detection module which are uniformly controlled by a PLC (Programmable Logic Controller). The system is characterized in that the concentration of acid gas in tail gas is monitored in real time through a detection module, the injection concentration of a medicament is dynamically fed back and adjusted by adopting a cascade PLC control strategy, and actual engineering control logic is simulated; and the cyclone separator and the high-precision weighing ash hopper are integrated, so that the real-time accurate metering of the reaction ash yield is realized. The evaluation method comprises three stages of preparation, reaction and evaluation, and can synchronously and accurately evaluate the deacidification efficiency and economy of the deacidification agent and the influence on the fly ash yield. A reliable experimental platform and evaluation means are provided for developing high-quality deacidification agents, and optimization of waste incineration flue gas purification and reduction of sources of fly ash are facilitated.

The invention discloses a household garbage incineration fly ash low-temperature pyrolysis flue gas coupling treatment system and method, and belongs to the field of household garbage incineration fly ash treatment. The system comprises a fly ash pretreatment unit, a pyrolysis unit, a protective gas supply unit and a flue gas purification unit, according to the invention, CO2 obtained by carbon capture of waste incineration flue gas is used as a pyrolysis protection gas, fly ash and an additive are mixed and stirred and then are fed into a pyrolysis unit to complete low-temperature pyrolysis, after the pyrolysis flue gas is subjected to multi-stage purification, the flue gas rich in CO2 can be recycled to a carbon capture process, and the flue gas reaching the standard is directly discharged and is matched with a dust returning and recycling structure. According to the invention, pollutant source reduction and carbon emission reduction are realized, system energy consumption and operation cost are reduced, coupling modification with existing incineration plant facilities can be realized, and stable and up-to-standard emission of flue gas is ensured.

The invention belongs to the technical field of household garbage incineration regulation and control, and particularly discloses a household garbage incineration fly ash pollution characteristic prediction and regulation and control method and system. According to the method, after basic characteristic data such as the fly ash heavy metal content, the blending combustion material type and the calcium content are input, the leaching risk of the fly ash heavy metal can be predicted, namely passive'end detection 'is changed into active'source prediction', the fly ash environment risk can be predicted in advance, and a time window is reserved for regulation and control. On the other hand, on the basis of the prediction result, by adjusting the feeding ratio or process parameters, the environmental risk of the fly ash is controlled from the source, excessive adding of expensive stabilizing agents at the tail end is reduced, the full life cycle cost of fly ash treatment is reduced, and meanwhile the environmental risk is reduced from the source.

The invention discloses a cement raw material low-carbon decomposition method. The decomposition method comprises the following steps: carrying out a reaction on a cement raw material and a carbon-containing solid in a reaction furnace system, calcining, crushing, and adding gypsum, the cement raw material comprises calcium carbonate. Carbon-containing solids (coal, coke and biomass charcoal) are mixed with a cement raw material, a one-step reaction from CaCO3 + C to CaO + 2CO is directly carried out in a reaction furnace at 800-900 DEG C, a traditional calcium carbonate thermal decomposition path is replaced, and carbon emission in the process of carbonate is reduced from the source. Carbon monoxide gas generated by the reaction is recycled by a separation system and is used for synthesizing high-value chemicals such as methanol; and calcining the solid-phase product in a rotary kiln to obtain the high-iron-content cement clinker. The method can directly reduce carbon emission in cement production, can produce by-products of chemical raw materials, and has both environmental protection property and economical efficiency.

The invention discloses a sewage treatment method capable of reducing sludge production, which comprises the following steps: S1, sewage firstly enters an anaerobic hydrolysis reactor for hydrolytic acidification, and then the sewage enters an anaerobic sludge interception reactor; s2, carrying out nitrogen and phosphorus removal and organic matter degradation on the water treated in the step S1; s3, the water body subjected to biochemical treatment in the step S2 enters a secondary sedimentation tank, and solid-liquid separation is completed; s4, residual sludge discharged from the secondary sedimentation tank and the anaerobic sludge interception reactor is collected in a sludge tank and then enters a sludge concentration tank, and the water content of the sludge is reduced; s5, the concentrated sludge enters a special aerobic starvation reactor; s6, dehydrating equipment is used, and the treated mud cakes are made into dry and hard mud cakes. According to the method, the sludge yield is reduced from the source, and the potential pressure on the environment is fundamentally relieved; no harmful chemical agent is added in the process, so that secondary pollution is avoided; the reduced sludge is more stable, and favorable conditions are created for subsequent safe resource utilization.

This invention discloses a monitoring system and method for the synergistic treatment of odor and dust from landfill excavation, relating to the field of dust separation. The invention collects real-time pipeline gas composition data and automatically adapts the optimal operating parameters of a scrubbing tower via model mapping, reducing the core odor load at the source. Then, targeted dust removal operations eliminate the interference of dust on deodorization, while simultaneously collecting fog cannon operating parameters, meteorological data, and initial odor concentration. The mapping model accurately predicts the deodorization effect and the adhesion of the isolation layer's reagents. Based on a preset threshold, a hierarchical iterative optimization mechanism is constructed. First, the fog cannon parameters are adjusted to achieve rapid compliance. If the maximum number of repetitions is still insufficient, the scrubbing tower operating parameters are optimized in reverse, forming a cross-equipment collaborative closed-loop adjustment. This ensures stable compliance with odor control standards while strictly controlling the amount of reagents adhering to protect the isolation layer and prevent membrane aging and erosion, while also reducing manual intervention and energy waste.

The utility model belongs to the technical field of sewage treatment, and particularly relates to an enhanced biological low-carbon water purification system which comprises a front-end pretreatment and compound microorganism domestication subsystem, a filler microorganism fixed bed water purification subsystem and a soil filler percolation purification microorganism remediation subsystem, the front-end pretreatment and compound microorganism domestication subsystem comprises a resident group, a three-stage septic tank and a grating adjusting tank, the filler microorganism fixed bed water purification subsystem comprises an EMR purification tank, and the soil filler percolation purification microorganism remediation subsystem comprises a soil permeation area. The resident group, the three-stage septic tank, the grid adjusting tank, the EMR purification tank and the soil permeation area are connected in sequence. According to the utility model, a low-carbon ecological management and control technology is applied, nitrogen and phosphorus resources are recycled, water resources are reused, the energy consumption and the cost of rural sewage treatment are reduced, the stability and the maintainability are improved, and the pollution load is reduced from the source; meanwhile, the water pollution absorption capacity is enhanced, and a long-acting self-cleaning mechanism is formed.

This invention belongs to the field of aquatic product preservation technology and discloses a method for preserving fresh fish fillets based on source-based sterilization and endogenous antibacterial action. The method includes: non-thermal sterilization of fresh fish fillets, followed by ultrasonic-ultra-high pressure synergistic treatment in a nano-antibacterial emulsion, then draining, packaging, and refrigeration. The nano-antibacterial emulsion is prepared by dissolving natural antibacterial active substances in anhydrous ethanol as the oil phase and using an aqueous solution of a natural polymer as the aqueous phase. The oil and aqueous phases are mixed, homogenized under microfluidic high pressure, and then microfiltered. This invention utilizes a dual-core synergistic process of source-based non-thermal targeted inactivation of spoilage bacteria and enhanced penetration of a natural antibacterial system to significantly extend the shelf life of fresh fish fillets under 0-4℃ refrigeration conditions from the conventional 3-5 days to over 18 days, while preserving the texture, flavor, and nutrition of the fish fillets to the greatest extent possible.

The present application belongs to the technical field of organic synthesis, and particularly relates to a method and system for preparing diisopropyl peroxydicarbonate based on a micro-channel reactor. The present application uses a heart-shaped micro-channel reactor, pumps raw material potassium hydroxide solution and hydrogen peroxide solution from the inlet of the first piece, and pumps raw material isopropyl chloroformate from the inlet of the fourth piece, thereby realizing safe production in the preparation process of diisopropyl peroxydicarbonate, stable operation of the reaction, a substantial reduction in reaction time, accurate control of reaction temperature by a high-low temperature all-in-one machine, timely removal of heat, reduction in side reactions, a substantial increase in product yield, and finally obtaining a product with a yield of 99.5%, realizing source reduction in the preparation process, a reduction in energy consumption and raw material consumption per unit product, and fully meeting the strategic orientation of national green chemical industry and clean production. Meanwhile, the method of the present application can significantly reduce production cost, fill in the technical gap, enhance market competitiveness, and can be widely promoted.

The application discloses a landfill excavation odor and dust collaborative treatment monitoring system and method, relates to the dust separation field, and automatically adapts the optimal operation parameters of a washing tower through real-time collection of pipeline gas component data, so that the core odor load is reduced from the source; the interference of dust raising on deodorization is eliminated through targeted dust removal operation, operation parameters of a fog gun, meteorological data and initial odor concentration are synchronously collected, and the deodorization effect and the adhesion of the isolation layer medicament are accurately predicted with the aid of a mapping model; a hierarchical iteration optimization mechanism is constructed with a preset threshold as a benchmark, rapid standard reaching is realized by adjusting the fog gun parameters, and if the maximum number of repetitions is reached and the requirement is still not met, the operation parameters of the washing tower are reversely optimized, cross-device collaborative closed-loop adjustment is formed, odor treatment is stably up to standard, the adhesion amount of the medicament is strictly controlled to protect the isolation layer, membrane body aging and erosion are avoided, and manual intervention and energy consumption waste are reduced.

The invention discloses a low-noise clean water cleaning and sterilizing all-in-one machine and a cleaning and sterilizing method. The method is used for municipal sewage source reduction and sludge collaborative reduction. According to the method, chemical detergents are not needed in the whole process, after coarse paper is pretreated, a to-be-cleaned object is placed on a rotary tray, water flow is generated through a high-pressure pump and forms cleaning jet flow with the cavitation effect through a gas-liquid mixing mechanism, the cleaning jet flow is sprayed to the surface of the to-be-cleaned object, scanning type cleaning and disinfection are achieved in combination with rotation of the tray, and sewage is discharged instantly. The clean water cleaning and sterilizing all-in-one machine comprises a mounting cabinet, a cleaning cylinder, a high-pressure pump, a gas-liquid mixing mechanism, a reversing valve, an upper / lower nozzle, a hollow tray, a tray rotating motor, a lifting arm, a flow guide central column, a noise reduction module and a control module. The synergistic effect of macroscopical scouring and cavitation microcosmic stripping is utilized, the cleaning and sterilizing efficiency is remarkably improved, sewage source reduction and sludge collaborative reduction are achieved, and the method is environmentally friendly and efficient.

The application relates to an intelligent pretreatment system for building decoration garbage and a treatment process thereof, which comprises a collecting and distributing box, a feeding port arranged at the top of the collecting and distributing box body, a plurality of recovery chambers arranged in the collecting and distributing box body, a main conveying belt arranged above the recovery chambers, a crushing unit in communication with the feeding port and used for crushing the building decoration garbage, a delivery unit, a spiral screening unit, an airflow separation unit, a metal removal unit, a sorting unit and a dust collecting unit, wherein the spiral screening unit, the airflow separation unit, the metal removal unit and the sorting unit are installed on the conveying belt, and the dust collecting unit is arranged beside the conveying belt. Compared with the prior art, the application can efficiently separate the building decoration garbage with different components, realize maximized utilization of resources, and promote source reduction of the building decoration garbage.

The application relates to the technical field of water collection and drainage, in particular to an assembled linear sponge type water collection and drainage facility, which comprises an egg-shaped drainage ditch and a linear water collection and sponge type drainage side ditch, the linear water collection and sponge type drainage side ditch comprises a plurality of modular drainage ditches, the plurality of modular drainage ditches are distributed along the length direction of a road, the modular drainage ditch comprises a buried section and a kerb, the egg-shaped drainage ditch is arranged in the buried section, the egg-shaped drainage ditch is arranged along the length direction of the road, the top of the egg-shaped drainage ditch is provided with a linear water collection structure, and a continuous and gradually expanding water passing channel is formed by the top opening of the egg-shaped drainage ditch; a plurality of sponge type water seepage holes are arranged on the side of the egg-shaped drainage ditch, the sponge type water seepage holes are located on the lower side of the center of the egg-shaped drainage ditch, and the plurality of sponge type water seepage holes are uniformly arranged along the arrangement direction of the egg-shaped drainage ditch; and the application has the effects of facilitating source reduction and reducing the runoff of rainwater.

The utility model belongs to fluorine chemical industry technical field especially relates to a hydrogen fluoride recovery production device, including the dehydrofluorination kettle, primary condenser, secondary condenser, hydrogen fluoride receiving tank, hydrogen fluoride dehydrofluorination kettle and tail gas absorption device that are sealed and connected in proper order through pipeline, a plurality of stirring paddles are arranged in the dehydrofluorination kettle, the dehydrofluorination kettle outside is provided with steam jacket, primary condenser is connected with the dehydrofluorination kettle top, secondary condenser is connected with primary condenser export, hydrogen fluoride receiving tank is connected with primary condenser and secondary condenser, hydrogen fluoride receiving tank outside is provided with brine jacket, hydrogen fluoride measuring tank is connected with hydrogen fluoride receiving tank, tail gas absorption device is connected with secondary condenser. The utility model makes excess HF from the organic phase volatilization, through the high -efficient liquefaction recovery of primary and secondary condenser, has improved the recovery rate, has reduced HF waste significantly, has reduced raw material unit consumption, has reduced waste acid emission from the source.

This invention provides a method for the synergistic control of H2S and CH4 emissions from wastewater by microorganisms and iron. The method includes adding a microbial agent and a ferric iron source to the wastewater to be treated; the microorganisms in the microbial agent include one or both of Bacillus subtilis and Saccharomyces cerevisiae; the inoculation concentration of the microorganisms is (1-2) × 10⁻⁶. 7 CFU / mL, the concentration of the ferric iron source is 5-30 mg Fe·L⁻¹ ‑1 The method for controlling the emission of H2S and CH4 in wastewater through the synergistic effect of bacteria and iron provided by this invention achieves simultaneous and efficient source reduction of H2S and CH4 in wastewater by constructing a synergistic system of microbial agents and ferric iron. While ensuring excellent emission reduction effect, it also takes into account the economic efficiency and engineering operability, and has broad application prospects.

This invention discloses a method for controlling and reusing nitrogen and phosphorus pollution at the source in farmland by intercepting wastewater. The method includes: excavating furrows, collection ditches, and ecological purification ponds; constructing two dividing dams within the ecological purification pond to separate it into a water storage area, a facultative oxidation area, and a deep ecological treatment area; the water-facing side of the dividing dams is divided into a partially permeable structure and a permeable structure from bottom to top, with a water-stopping stepped transition structure between the two; the water-repellent side of the dividing dams is a fully permeable structure; and functional microbial communities and plant systems are deployed in the water storage area, facultative oxidation area, and deep ecological treatment area. This method enables synergistic collection and end-of-pipe purification of farmland wastewater, achieving gradient process interception of nitrogen and phosphorus in farmland, significantly improving the graded purification efficiency of nitrogen and phosphorus pollutants, and balancing process purification efficiency with system operational stability.

The invention relates to the technical field of open-pit mine mining, and provides an open-pit stope development system reconstruction method, device, equipment and medium, and the method comprises the following steps: when a stope internal dumping space is not formed in an open-pit stope, constructing an internal dumping site conversion space; after the inner dumping condition is met, the stripped waste rocks are temporarily stacked to an inner dumping site conversion space from bottom to top according to a preset path; when it is detected that the inner row working line is about to cover the original development transportation line, a new replacement development transportation road is constructed through waste rocks; when the distance from the pressure covering area of the inner dumping site conversion space reaches a preset distance, calculating the volume of a stope space formed by the current mining and stripping operation and the volume of a space required by inner dumping and stripping of waste rocks, and judging the accommodating capacity of the stope space; and according to the judgment result, the inner dumping site conversion space is treated, and the pressing and covering area is released till inner dumping operation is completed. By means of the technical scheme, the dual purposes of solid waste source reduction and mining efficiency improvement are achieved, and the construction and operation and maintenance cost of the waste dump is reduced.

This invention relates to the field of tailings dam pollution prevention and control, and discloses a method for reducing leachate sources and blocking leakage in tailings dams. The method includes at least the steps of identifying leakage problems and constructing a blocking system. Leakage problem identification includes the following steps: S1: basic data collection and on-site investigation; S2: acquisition of leachate leakage and diffusion channels through multi-source data fusion. The blocking system construction includes the following steps: S3: determining whether the tailings dam is operational; if so, proceed to S4; otherwise, proceed to S6; S4: analysis of pollutant release mechanisms and pollution characteristics in the tailings dam; S5: design and implementation of pollutant source reduction schemes; S6: design and construction of tailings dam leakage blocking structures. This invention constructs a complete tailings ecological environment governance system from leakage, pollution identification, source blocking to ecological restoration, and adopts a comprehensive prevention and control method covering source reduction and diffusion paths of tailings pollution release to block the spread of pollution sources.

The application relates to the technical field of intelligent environmental protection equipment, and discloses an unattended "two-network fusion" intelligent garbage classification house, which comprises a garbage house, a recyclable garbage throwing area and a kitchen garbage throwing area are arranged in the garbage house, and the garbage house further comprises a recyclable garbage collecting rack arranged in the recyclable garbage throwing area, the recyclable garbage collecting rack is provided with a throwing mechanism for throwing recyclable garbage and a compression mechanism for compressing recyclable garbage; a kitchen garbage collecting rack arranged in the kitchen garbage throwing area, the kitchen garbage collecting rack is provided with a bag breaking assembly for breaking open a garbage bag and collecting kitchen garbage in the bag and a bag body conveying mechanism for collecting empty bags, and the bag body conveying mechanism is located on one side of the bag breaking assembly. The device can realize compression and collection of recyclable garbage, improve storage capacity, realize efficient separation of kitchen garbage and garbage bags, improve recycling efficiency, realize garbage source reduction and maximum resource utilization, and promote the development of green low-carbon circular economy.

This invention discloses an in-situ co-treatment method for groundwater in abandoned mine goaf areas, belonging to the field of environmental engineering. The method includes the following steps: Step 1, draining and replenishing groundwater in the goaf area by setting up cofferdams and water diversion channels; Step 2, grouting and sealing the dominant channels for surface water replenishment to the goaf area, carrying out anti-seepage transformation of the seepage sections in the goaf area, and simultaneously constructing surface drainage and water diversion engineering facilities upstream of the seepage sections to reduce the infiltration and replenishment of the goaf area by surface water and atmospheric precipitation; Step 3, constructing a multi-stage continuous alkali production system using abandoned roadways or along the groundwater seepage path in the goaf area. The continuous alkali production system is used to neutralize the acidity of the groundwater in the goaf area and remove sulfates and heavy metals; Step 4, using an anaerobic-aerobic constructed wetland series treatment for the mine tunnel inflow water in the goaf area. This invention reduces the amount of mine water replenishment in goaf areas by 60-75% through source reduction; by constructing a continuous alkali production system and an artificial wetland at the end of abandoned roadways, it can achieve low-cost and sustainable groundwater management, thereby supporting the further improvement of the ecological environment quality in my country's mining areas.

This invention discloses a method for inhibiting the formation of brominated dioxins during the thermal treatment of bromine-containing waste. The thermal treatment process includes a pretreatment stage, a combustion stage, and a post-combustion flue gas cooling stage. Additives are added during the combustion stage and / or the post-combustion flue gas cooling stage to inhibit the formation of brominated dioxins. These additives are inhibitors and / or oxidants. This invention effectively inhibits the formation pathway of brominated dioxins during the combustion and post-combustion flue gas cooling stages of bromine-containing waste by specifically adding additives during these stages, achieving an inhibition rate of 20% to 44%. This method is suitable for application in the thermal treatment of bromine-containing waste and provides an economical and feasible technical solution for source reduction of brominated dioxins.

The present application belongs to the technical field of papermaking white water treatment, especially a papermaking white water treatment and reuse method. In view of the problems of low fiber and filler recovery efficiency, poor quality of reused materials, lack of cooperation among various treatment units, and unstable system operation in the existing papermaking white water treatment and reuse process, the following scheme is proposed, which includes the following steps: S1: online monitoring and characteristic analysis of papermaking white water; S2: gradient targeted flocculation pretreatment of white water; S3: pumping the pretreated white water into a partition-optimized multi-disc filter for dynamic filtration. The present application realizes multi-unit intelligent linkage and self-adaptive optimization of the whole process of white water treatment by constructing a closed-loop control system from online monitoring, intelligent decision-making to precise execution, significantly improves the recovery efficiency of fiber and filler and the quality of papermaking, realizes efficient hierarchical reuse of water resources and source reduction of pollutants, and achieves the unity of economic, environmental and social benefits.

The invention belongs to the technical field of sewage treatment, and provides a refining sludge source reduction and classification treatment process and system.The process comprises the steps that sewage is pretreated to obtain a first liquid phase and a first solid phase, and then the first liquid phase is separated to obtain a second liquid phase and a second solid phase; introducing the second liquid phase into a sewage treatment device to obtain a third liquid phase and a third solid phase, then discharging the third liquid phase, and carrying out concentration treatment and dehydration treatment on the third solid phase to obtain a fourth liquid phase and a fourth solid phase; and sequentially carrying out demulsification treatment and dehydration treatment on the first solid phase and the second solid phase to obtain a fifth liquid phase and a fifth solid phase. The sludge source is treated, solid substances in the separated liquid phase are separated for multiple times, the finally discharged clear liquid is collected and utilized, the purification efficiency of the three kinds of sludge is improved, the reduction rate of the refined sludge is increased, meanwhile, the separated three kinds of sludge are dried and incinerated, and pollution is reduced.

The utility model provides a kind of fly ash source head reduction's waste incineration device, it includes economizer ash bucket, cloth bag dust collector, the scraper machine head below of cloth bag dust collector is equipped with ash discharge opening, the ash discharge opening is connected with the metering ash bin of weighing function, the outlet of metering ash bin is connected with feeder, and the discharge end of feeder is connected with dust collector inlet flue by Roots blower;The guide vane and groove separator are additionally provided in economizer ash bucket;Incinerator rear wall ash pipe extends to the below of wind chamber pulse soot blower, the upper portion of the residue well is equipped with air seal air curtain module, the branch air pipe of air seal air curtain module is connected with burnout fan, and air seal air curtain covering the residue well mouth is formed.The technical scheme of the utility model is to recycle fly ash of cloth bag dust collector by modifying original equipment, increase groove separator and guide vane and other various optimization measures, reduce fly ash generation, less investment, no additional energy consumption and no harmful substance generation.

The invention belongs to the technical field of agricultural water conservancy, and particularly relates to an agricultural non-point source pollution comprehensive treatment method suitable for a plain water network area. The method comprises the following steps that source reduction of agricultural non-point source pollution is achieved through field water-saving irrigation, water and fertilizer comprehensive regulation and control, domestic sewage and aquaculture wastewater treatment and bottom mud dredging; a farmland-branch ditch-pond internal circulation system is adopted, and circulation and purification of nitrogen and phosphorus in the system are achieved by regulating and controlling the water level, the water flow speed and the hydraulic retention time. By adopting the dry ditch-pump station tail end prevention and control system, the retention time of nitrogen and phosphorus in the tail end prevention and control system is prolonged and the purification effect is enhanced through scheduling of an ecological floating bed, oxygen-enriched algae control equipment and a pump station. According to the method, through three measures of agricultural non-point source pollution source reduction, internal circulation and purification and tail end prevention and control, the whole process from agricultural non-point source pollution flowing out of a farmland to entering a downstream receiving water body is started, and the harm of the agricultural non-point source pollution to the water body is reduced to the maximum extent.

The invention discloses a preparation method for producing a selenium-rich microbial nutrient solution from residual vegetables and residual fruits in a farmer's market, which comprises the following steps: S1, collecting and sorting the residual vegetables and residual fruits: cleaning and transporting the residual vegetables and residual fruits produced in the farmer's market to a sorting workshop in a closed manner; non-organic impurities such as plastic bags, foam boxes, ropes, glass bottles, metals and the like are removed on a sorting table in a mode of'mainly manual work and supplemented by auxiliary tools', and sorted rotten vegetables and rotten fruits are classified; s2, crushing and pulping: putting the sorted and properly washed rotten vegetables and rotten fruits into a horizontal pulping machine, and controlling the feeding speed to avoid overload of equipment; according to the method, 1 ton of rotten vegetables and rotten fruits are treated every day, about 350 tons of rotten vegetables and rotten fruits are treated every year, and waste source reduction is achieved; the closed fermentation and waste gas treatment device avoids stink leakage, solid residues are treated in a compliance manner, stink of farmer's markets and surroundings is eliminated, mosquito breeding is reduced by 90% or above, and the pollution risk of soil and water resources is reduced.

The invention belongs to the technical field of microorganisms, and particularly relates to a kitchen waste complex microbial inoculant as well as a preparation method and application thereof. The kitchen waste complex microbial inoculant comprises bacteria and fungi. The bacteria comprise bacillus thuringiensis, bacillus vedmannii, paenibacillus arachidicola, bacillus, preristeria koreensis and preristeria megatherium; the fungi comprise black powder saccharomycetes and fusarium laminatum. According to the method disclosed by the invention, the problems of obstruction of a hydrophobic membrane formed by grease and difficult degradation of cellulose are specifically solved by utilizing the synergistic effect of bacteria and fungi, so that the biodegradability of organic dry matters in the kitchen garbage is remarkably improved, and real source reduction is realized. Meanwhile, the invention provides a solid microbial inoculum which is subjected to double optimization of a fermentation process and a carrier adsorption process, so that the solid microbial inoculum can still keep high activity and high stability for a long time in an actual engineering environment of continuous feeding and salt accumulation, and the requirement of long-term continuous operation of distributed kitchen garbage treatment equipment is effectively met.