61results about How to "Short governance cycle" patented technology

The invention discloses a repair method for mercury-polluted soil. The repair method comprises the following steps: ploughing up surface soil with a depth of 25-30 centimetres away from ground surface, of the mercury-polluted soil, air-drying, grinding and sieving to obtain pre-treated surface soil; forming a passivator from 40-55 parts of bentonite, 5-15 parts of hydroxyapatite, 3-8 parts of ammonium thiosulphate and 8-16 parts of calcium hydroxide in parts by mass; adequately and uniformly mixing the passivator with the treated surface soil according to an added amount which is 2-5% of the mass of the surface soil, of the passivator, standing for 10-20 days until mercury with a content of 70% in the surface soil is fixed, and completing passivator repair; and levelling the surface soil, planting Indian mustard, dissolving calcium thiocyanate in water and uniformly spraying the solution into the peripheral soil of the root systems of Indian mustard during the vigorous growth period of Indian mustard, and finally harvesting Indian mustard. The repair method disclosed by the invention is simple to operate, low in cost, short in remediation period, and suitable for application of repair for large-area mercury-polluted soil plants.

The invention relates to the technical field of soil treatment, and particularly relates to a high-efficiency saline-alkaline soil improvement method. The method comprises the following steps that desulfurized gypsum, zeolite and vinegar residues are mixed; then gluconic acid, expired yogurt and grape skin are added; the gluconic acid, the expired yogurt and the grape skin are degraded under the action of nitrogen-fixing alcaligenes faecalis for generating a large amount of free hydrophilic carboxyl groups; the carboxyl groups are introduced into the surfaces of the desulfurized gypsum, the zeolite and the vinegar residues under the action of the microorganisms for improving the hydrophilicity; the carboxyl groups have a metal complexing property, and finally a fermentation product which has good hydrophilicity and can adsorb metal salts by complexing is obtained; the fermentation product is put into porous moso bamboos; the porous moso bamboos are buried in planting pits; and then saline-alkaline tolerant plants are planted in the planting pits, so that improvement on saline-alkaline soil is completed. Water in surrounding soil can be gathered and absorbed, so that an effect of water retention and moisture preservation is achieved. With the increase of the concentration of the water in the soil, the concentration of salt in the soil can be reduced, the alkalization degree is reduced, the pH value of the soil is buffered, and the purpose of improving the saline-alkaline property is achieved.

The invention relates to a method for treating black and smelly rivers by electrochemistry combined with biological ecology. The method is characterized in that an electrochemical treatment device, abiological contact oxidation system, aeration systems, a microbial agent, a sediment biological agent, biological grids and an artificial floating island are included. A biological contact oxidationpool is formed at the cofferdam at the front end of a to-be-treated river, electrochemical treatment is conducted in the river simultaneously, the river is segmented, and the aeration systems are arranged for aerobic aeration treatment; electrochemical treatment is ended before the microbial agent is spread, and aerobic aeration treatment is maintained; the sediment biological agent is spread forsediment oxidation remediation treatment, and aerobic aeration treatment is maintained; the biological grids capable of adsorbing microorganisms and plankton are arranged in the middle of the river atcertain intervals to allow the microorganisms and the plankton to reproduce; the artificial floating island is arranged in the middle of the river, and emergent aquatic plants are planted on the artificial floating island to restore the natural self-purification ability of the to-be-treated river.

The invention discloses a method for separating and porcelainizing soil for treating a toxic land parcel and relates to harmless treatment and utilization of the toxic land parcel. A method for detecting toxic areas of the toxic parcel is conducted based on composition of soil, separation of soil, high-temperature damage to toxic organic compound molecular structures, high-temperature damage to toxic inorganic compound molecular structures, mineral recombination, a sealing effect on glass phases and safety, volume weight and purposes of stoneware or ceramic particles and stoneware or ceramic sand grains. The toxic areas of the toxic land parcel are detected; the soil is separated; a stony material is cleaned and detoxified; the soil is broken and directly fired to be detoxified; gravel soil difficult to separate is smashed, formed and fired to be detoxified; sand and clay are formed and fired to be detoxified; and smoke is treated and metal is recovered. The fired stoneware or ceramic particles and the fired stoneware or ceramic sand grains are used for replacing river sand, gravel and ceramsite and to be used as backfill materials, roadbed materials, filtering materials, building materials, dustproof water seepage face materials of gardens and the like.

The invention discloses an in-situ remediation method for mercury-contaminated soil. The method comprises the following steps of pretreatment of the mercury-contaminated soil, modification of the mercury-contaminated soil, remediation by a passivator, and phytoremediation. The remediation method is easy to operate, low in cost, short in treatment period, high in efficiency, capable of effectivelyreducing the content of effective mercury in the soil and suitable for plant remediation of the large-area mercury-contaminated soil.

The invention discloses a method for repairing polycyclic aromatic hydrocarbon contaminated sites and application, and relates to the technical field of soil repairing. The repairing effect can be effectively exerted, the pollution of polycyclic aromatic hydrocarbons, such as benzo(a)anthracene, benzo(b)fluoranthene and benzo(a)pyrene, indeno[1,2,3-cd]pyrene and dibenz(ah)anthracene in soil is reduced, the requirements of soil repairing are met, and the beneficial effects of environmental treatment and repairing are achieved. According to the method for repairing the polycyclic aromatic hydrocarbon contaminated sites, a repairing agent is applied to the contaminated soil, the soil moisture content is adjusted, and the soil is stacked after uniform stirring. The pollution risk of the site can be effectively removed or controlled, and it is guaranteed that the health of future receptors after the sites are developed is not harmful. The repairing agent used in the method is easy to obtain, is low in cost, is easy to operate and implement, is short in treatment period and remarkable in effect and is easy for engineering application, and economic benefit, environmental benefit and social benefit can be effectively realized.

The invention discloses a flat plate type low-temperature plasma soil remediation method and device. The flat plate type low-temperature plasma soil remediation device comprises a conveying belt madeof a conductive material and connected with a ground wire. A high-voltage electrode layer is arranged on the upper portion of the conveying belt and electrically connected with a low-temperature plasma power source. The low-temperature plasma power source is switched on, and then a low-temperature plasma discharge area is formed between the conveying belt and the high-voltage electrode layer. Thesoil remediation method comprises the steps that the conveying belt conveys contaminated soil to pass through the low-temperature plasma discharge area; the discharge area conducts discharge on the surface and the interior of the contaminated soil; O2, N2 and water molecules in air collide with high-energy electrons in the discharge area, and thus high-energy groups are generated; and the high-energy groups and toxic and harmful substances in the contaminated soil react to generate nontoxic and harmless small-molecule substances. According to the flat plate type low-temperature plasma soil remediation method and device, continuous and large-batch treatment of the contaminated soil is achieved, the treatment effect is good, the cost is low, the period is short, and safety is good.

The invention discloses an anti-clogging pipeline used for discharging salt, belonging to the technical field of salt discharging in a saline-alkali land. The anti-clogging pipeline comprises a salt-discharging main pipeline, wherein the top part and the bottom part of the salt-discharging main pipeline are respectively provided with pipeline connectors; the top part of each pipeline connector located at the top part of the salt-discharging main pipeline and the bottom part of each pipeline connector located at the bottom part of the salt-discharging main pipeline are respectively provided with a pipeline socket; the top part of each pipeline socket located at the top part of each pipeline connector and the bottom part of each pipeline socket located at the bottom part of each pipeline connector are respectively provided with a salt-discharging branch pipeline; the inner cavity of each pipeline socket is provided with an anti-clogging filtering device; water-permeable holes are arranged on the pipe wall of each salt-discharging branch pipeline; and the outer wall of each salt-discharging branch pipeline is provided with a water-permeable film. The anti-clogging pipeline provided by the invention has the advantages of simple structure, reasonable design, high practicality, convenient use, continuous salt-discharging and alkali-reducing effects, short treatment cycle, low price, low cost, strong salt-discharging ability, good anti-clogging performance, characteristics of high strength and corrosion resistance, long service life, and extensive market prospects.

The invention discloses a composite microbial agent and a preparation method and application thereof, and a treating method for a black and odorous river. The composite microbial agent comprises a microbial agent A composition, a microbial agent B composition and a microbial agent gamma composition, wherein the microbial agent A composition comprises Bacillus coagulans, lactic acid bacteria, saccharomycetes, Aspergillus sojae and Thiobacillus denitrificans; the microbial agent B composition comprises Bacillus coagulans, silicate bacteria, Bacillus firmus and lactic acid bacteria; and the microbial agent gamma composition comprises lactic acid bacteria, Bacillus subtilis, Saccharomyces, Bacillus licheniformis and Bacillus coagulans. The composite microbial agent provided by the invention can be used for treating black and odorous rivers, is short in treatment period, and can effectively solve the problem that nitrogen and phosphorus exceed the standard in black and odorous water and eliminate the odorous gas hydrogen sulfide in water.

The invention discloses a preparation method of modified remediation plant biochar for cadmium-contaminated soil remediation. The preparation method comprises the following steps: (1) harvesting remediation plants containing a certain concentration of heavy metals, washing, drying, crushing and screening to obtain biomass raw materials; (2) putting the biomass into a tubular furnace in a nitrogenatmosphere for high-temperature carbonization, keeping the pyrolysis temperature at 400-700 DEG C and the retention time at 1-2 hours, cooling to room temperature, and grinding to obtain remediation plant biochar with different pyrolysis temperatures; (3) taking a certain mass of repair plant biochar, flatly laying the repair plant biochar in a glass ware of about 2 mm, and irradiating the repairplant biochar under a 250 W ultraviolet lamp for 8-24 h; and (4) taking out the culture dish after the irradiation is finished to obtain the modified repair plant biochar. The remediation plant biochar prepared by the method is low in toxic leaching amount, has environmental acceptability, and is simple in preparation method, the modified biochar effectively inhibits the effectiveness and mobilityof heavy metals in soil, and dual values of safe disposal and resource reutilization of hazardous wastes are realized.

The present invention relates to treating technology of polluted river, lake, sea and reservoir water, and is especially water treating method for river, lake, sea and reservoir applying digital technology. The water treating method includes the following steps: 1. collecting the varying parameters of the water to be treated; 2. performing operation on the collected data, giving initial values of the variables in numerical integrating method, performing sensitivity analysis and variable correction; 3. establishing model; 4. selecting the treating scheme based on treating requirement and water eutrophication status; 5 emergency treatment; and 6. establishing digitalized management system. The method can treat water environment radically and comprehensively.

The invention discloses a method for safe production while lossless in-situ remediation of moderately and mildly cadmium-polluted farmland soil. According to the method, rice and sesbania are planted in an intercropping mode, and 1-2 rows of sesbania are intercropped every 3-4 rows of rice; a nitrogen-phosphorus-potassium compound fertilizer and an organic fertilizer are dressed for promoting the growth of rice and sesbania; in the remediation period, the water content of the field soil is kept at 70%-100%; and after the rice is mature, the rice and sesbania are harvested at the same time. According to the method, the yield of rice can be stable or obviously increased, the cadmium content in grains is lower than the national food safety standard, meanwhile, efficient extraction of cadmium from sesbania is promoted, and thus the purpose of safe production while lossless in-situ remediation is achieved. The method does not need additional additives, does not destroy the soil structure and composition, does not cause secondary pollution, has the advantages of wide applicability, high efficiency, small engineering quantity, short treatment period, low cost and the like, and is suitable for treating the moderately and mildly cadmium-polluted farmland soil.

The present invention discloses a degradable integrated seed-fertilizing soil desertification control method. The method comprises the following steps: 1, adding a binder solution prepared from a polymer water-soluble bio-based binder and water to a seed-fertilizing soil mixture composed of a water-soluble fertilizer containing humic acid, grass seeds and sand soil, and stirring the materials evenly to obtain prefabricated seed-fertilizing soil granules; 2, preparing a natural polymer material solution and a crosslinking agent solution; 3, spraying the crosslinking agent solution on surfaces of the prefabricated seed-fertilizing soil granules to obtain a prefabricated seed-fertilizing soil granule semi-product; 4, adding the prefabricated seed-fertilizing soil granule semi-product into thenatural polymer material solution to obtain seed-fertilizing soil gel; and 5, after water-soaking the seed-fertilizing soil gel, spraying the water-soaked seed-fertilizing soil gel on a sand surfacelayer. Water absorption and water retention characteristics of the gel are utilized to provide humidity and temperature conditions for grass seeds, the survival rate of the grass seeds is improved, problems that water and fertilizer retention performance of sand land is poor and large temperature differences cause difficult growth of the grass seeds are solved, and the degradable integrated seed-fertilizing soil desertification control method is suitable for control for degradation grassland, mobile sand, semi-mobile sand and fixed sand.

The invention discloses a water-saving, drought-resisting, wind-preventing, sand-fixing, frost-damage-preventing and desert gobi saline-alkali soil treatment method which is used for water retention, water conservation, drought resistance, wind prevention, sand fixation, urban and road greening, ecological environment restoration treatment, desert gobi saline-alkali soil treatment, frost damage prevention, plant planting, weed prevention, biological carbon sequestration and soil improvement. A container filled with water and/or a water bag filled with water and/or a water band filled with water are/is placed on the periphery of an existing plant, and/or the periphery of plant seeds, seed buds, seed branches and seedlings, and/or the surface of a plant growth matrix, and/or the surface of a region with frost damage risk and in ditches and pits. The device is placed on the earth surface and the ditch pit which need to be protected, maintained and repaired, change characters and conditions and provide a sheltering environment, and is placed on the periphery of an object to be manipulated and treated; and or plants are planted around the container filled with the water and/or the water bag filled with the water and/or the water hose filled with the water.

The invention discloses a method and a device for efficiently treating a black and odorous river by utilizing rapid biofilm formation of a filler. The method comprises the following steps: 1) selection of the filler: selecting a soft porous filler; 2) biofilm formation: putting the soft porous filler selected in the step 1) into an activated sludge aerobic tank for biofilm formation; and 3) treatment: putting the filler having undergone biofilm culturing in the step 2) into a black and odorous river for treatment, and recovering the filler until the water quality of the black and odorous rivermeets requirements. According to the method, the filler with high biomass and high degradation activity obtained after biofilm formation of activated sludge is used for treating the black and odorousriver; remarkable water body purification effect is obtained; the biofilm formation method is economical, rapid and more practical; and the device is convenient to manufacture, low in cost and capable of being recycled.

The invention provides a bioremediation method for heavy metal contaminated soil, and particularly relates to the technical field of heavy metal contaminated soil remediation. According to the method, crop rotation of the Taiwan feather cockscomb and the red-spotted stonecrop is utilized for cadmium-lead combined pollution farmland soil remediation, the independent remediation window period is perfectly eliminated, the plant remediation efficiency can be improved, the soil remediation period is shortened, and the remediation cost is reduced. The embodiment proves that the Taiwan feather cockscomb and German red-spotted stonecrop crop rotation mode has a very obvious remediation effect on the cadmium-lead combined pollution of the soil, and has huge application potential.