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261results about How to "Improve physical structure" patented technology

Preparation method of catalyst for catalyzing ozonation for advanced treatment of coal chemical wastewater

The invention discloses a preparation method of a catalyst for catalyzing ozonation for advanced treatment of coal chemical wastewater and relates to a preparation method for the catalyst. The preparation method is used for solving the technical problems that the existing ozonation method is poor in ozone water solubility and low in degradation rate, successfully applied to the advanced treatment of the coal chemical wastewater, and capable of removing the degradation-resistant hazardous substances in water, improving the biodegradability of the wastewater and enabling the quality of the outlet water to reach the first-grade national emission standards. The preparation method comprises the following steps of: firstly, washing active carbon particles; secondly, soaking the active carbon in a metal nitrate solution, shaking for mixing and reacting, and taking out the active carbon 12 hours later; and thirdly, drying the active carbon and putting the dried active carbon to a muffle furnace, heating the muffle furnace to 200 DEG C by adopting nitrogen gas as the protective gas, roasting for one hour, continuing heating the muffle furnace to 600 DEG C and roasting for 3 hours at 600 DEG C to obtain the catalyst for treating the coal chemical wastewater. By using the catalyst prepared by the preparation method disclosed by the invention, the utilization rate of ozone is greatly improved, and the catalyst is very suitable for the field of coal chemical wastewater treatment.
Owner:HARBIN INST OF TECH

High-permeability super black decorated base paper and preparation method thereof

The invention relates to high-permeability super black decorated base paper and a preparation method of the high-permeability super black decorated base paper, and belongs to the technical field of decoration base paper. The preparation method is characterized by comprising the following steps: taking pulp mixed from bleached softwood pulp and bleached hardwood pulp according to the mass ratio of 1:(3.6-4.4) as a main raw material; reducing the beating degree of bleached wood pulp to 32 SR, enabling the mass concentration to reach 4%, and then pumping into a repulping pond for later use; directly adding a black pigment to the repulping pond, wholly substituting kaoline for titanium dioxide to prepare the decorated base paper with a black and shiny color, the fluorescent whiteness of 6%-8%, the basis weight of 70-90g/m<2>, the ash content of 10%-15%, the wet strength of 6.5-9N, the dry strength of 35-50N, the water absorption of 20-35mm/10 minutes and the air permeability of 15-20s/100ml. The high-permeability super black decorated base paper disclosed by the invention has the advantages of uniformity in coloring, good covering power, high air permeability, low basis weight and high paper output ratio; a processed decorating plate is high in stereoscopic impression, pure and bright in color and luster, green and environmental-friendly without white patterns.
Owner:ZIBO OU MU SPECIAL PAPER

Compound passivator of heavy metal contaminated soil and preparation method and application of compound passivator

The invention relates to a compound passivator of heavy metal contaminated soil and a preparation method and application of the compound passivator of heavy metal contaminated soil. The compound passivator comprises 8.0 to 10.0% of slaked lime, 25.0 to 30.0% of modified diatomite, 35.0 to 40.0% of modified phosphogypsum and 25 to 30.0% of biomass carbon in percentage by weight. The use amount of the compound passivator varies according to the soil contamination degree, generally within 1.5% to 2.0%. The preparation of the compound passivator is prepared by mixing the slaked lime, the modifieddiatomite, the modified phosphogypsum and biomass carbon proportionally; the compound passivator disclosed by the invention has a good application effect in remediation of cadmium, lead, zinc and copper compound contaminated soil by a synergistic action of multiple different passivation mechanism components, further can improve the vegetable quality and reduce crop absorption of pesticide residues, and is suitable for remediation of the large-area heavy metal contaminated soil, including the remediation of heavy metal contaminated farmland soil near industrial and mining areas and contaminatedsites in heavy metal production enterprises. The compound passivator can passivate various heavy metal elements and has high passivation efficiency.
Owner:YUNNAN AGRICULTURAL UNIVERSITY

Solanum tuberosum and double cropping rice rotation crop rotation culture method for improving south double cropping rice paddy soil micro-aggregate structure

The invention provides a solanum tuberosum and double cropping rice rotation crop rotation culture method for improving a south double cropping rice paddy soil micro-aggregate structure, and belongs to the field of agricultural production. The method mainly comprises the first step of solanum tuberosum high-yield cultivation and the second step of early rice and late rice high-yield cultivation, wherein the first step comprises the substeps of preparation before seeding, variety selection, cutting of seed solanum tuberosum, seeding at suitable time and coverage of straw and a mulching film, field management comprising timely film breaking, topdressing, drainage and insect disease prevention, timely harvesting, and field returning of solanum tuberosum stem leaves and straw for coverage, and the second step comprises the substeps of variety selection, seedling transplanting, filed management comprising scientific fertilization, weeding, irrigation and insect disease prevention, timely harvesting and field returning of straw. By means of the method, south double cropping rice paddy winter agriculture can be reasonably developed, the rice paddy soil micro-aggregate structure is effectively improved, soil is fertilized, economic benefits of solanum tuberosum in one season are increased on the basis of ensuring the double cropping rice yield, the purposes of improving the rice paddy soil structure and obtaining high-yield year-round crops are achieved, and the popularization value is high.
Owner:HUNAN SOIL & FERTILIZER INST

Soil conditioner and organic fertilizer containing soil conditioner, and method of producing the same

The invention relates to a soil conditioner, an organic manure containing the soil conditioner and a preparing method thereof. 60.0 to 80.0 portions of pluck is selected according to the weight portion, 30.0 to 40.0 portions of food vinegar is added into the pluck after the pluck is crashed, the dipping extracting solution is concentrated, frozen out and crashed as the beneficiated burden material, then added into pulverized fuel ash after being atomized, 0.1 to 5.0 portions of the beneficiated burden material is selected according to the weight portion, 95.0 to 99.5 portions of pulverized fuel ash is added, and the beneficiated burden material and the pulverized fuel ash are uniformly mixed to be as the soil conditioner; 0.1 to 5.0 portions of the beneficiated burden material and 36.3 to 41.2 portions of the pulverized fuel ash are selected according to the weight portion, 8.7 portions of carbamade with 46 percent of nitrogen content, and 50.0 portions of turf with more than 60 percent of organic substance content are added, and after the materials are uniformly mixed, the organic manure containing the soil conditioner is prepared. Through manuring the soil conditioner or the organic manure containing the soil conditioner, the growing conditions of soil microbes can be improved, the activity of the soil microbes can be energized, the physical behaviour of the soil can be improved, the deliverability of the soil nutrient can be enhanced, the plant growth can be promoted, the stress resistance and the disease resistance of the plant can be enhanced, and the yield per unit and the quality of the plant can be remarkably improved.
Owner:沈笑天 +1

Method for matching and applying nitrification inhibitor and biomass carbon to improve nitrogen fertilizer utilization rate and application thereof

The invention provides a method for matching and applying a nitrification inhibitor and biomass carbon to improve a nitrogen fertilizer utilization rate and an application thereof. The method is characterized by comprising the following steps of: smoldering crop straws to prepare the biomass carbon; and mixing dicyandiamide and the biomass carbon and applying the mixture into soil; and adding an ammonium nitrogen fertilizer. When the application amount of an ammonium state or an amide state is 200-400 mgN per kg of soil, the utilization amount of the dicyandiamide is 5-50 mg/kg and the utilization amount of the biomass carbon is 50 g per kg of the soil. The method comprises the following specific application steps of: mixing the biomass carbon and the dicyandiamide and applying the mixture on surface-layer soil to be sufficiently mixed with the soil; and then, applying a chemical nitrogen fertilizer according to a conventional method. The method utilizes the characteristic that the biomass carbon has the very strong adsorption capability on the nitrification inhibitor and the dicyandiamide; before a chemical fertilizer is applied, the biomass carbon and the dicyandiamide are mixed and applied into the soil; and the keeping time of the dicyandiamide in the soil is improved and the inhibition effect of a nitration reaction of converting ammonium nitrogen to nitrate nitrogen is prolonged, so that the leaching loss of nitrogen is reduced and the nitrogen fertilizer utilization rate is improved.
Owner:INST OF SOIL SCI CHINESE ACAD OF SCI

Method for remediating petroleum-contaminated soil through coupling charcoal-loaded surface active agent and microorganism plant

InactiveCN109365495AImprove the soilConducive to the survival of microorganismsContaminated soil reclamationWater contentContaminated soils
The invention discloses a method for remediating petroleum-contaminated soil through coupling a charcoal-loaded surface active agent and a microorganism plant. The method comprises the following stepsof S1, applying the charcoal-loaded surface active agent into a petroleum-contaminated soil surface layer, and then standing and ageing for 80 days; S2, after ageing the soil, watering the soil on the surface layer, enabling the water content to reach to 50 to 60 percent, adjusting a pH value of the soil to be 7 to 8, and then adding a petroleum degradation microbial inoculum into the soil, and fermenting; S3, after fermenting the soil, planting a plant prepared according to different quantitative proportions in the soil, and removing the whole plant after the plant is ripe; and S4, cyclically repeating S1 to S3 until detecting that the content of a petroleum pollutant in the petroleum-contaminated soil is less than or equal to 4.5g/kg. The method for remediating the petroleum-contaminated soil through coupling the charcoal-loaded surface active agent and the microorganism plant provided by the invention adopts an in-situ remediation technology, does not damage environment during theremediation process, cannot bring secondary pollution, is green and environmental-friendly, and realizes a composite remediating mode with a good green cycle remediating effect.
Owner:LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY

Natural wheat protein composite modifying method and application thereof in the starch food products

A compound modification method of natural wheat protein and the application in starch food; the method and application relate to a compound modification method of natural wheat protein and the application of additive in starch food. The present invention provides a compound modification method of natural wheat protein. Wheat protein and reaction medium are taken to prepare the suspension and the suspension is oscillated by ultrasonic; and then the suspension is heated by water bath and mixed by magnetic force; the acid solution is divided evenly according to the circulation times and is added into the suspension in turn; the water bath is stopped 8 to 15 minutes later; the excessive acid is neutralized by alkalescent salt added until the pH value reaches 7; and then the suspension is oscillated by ultrasonic continuously and the alkalescent salt concentration is 0.05 to 0.2 mol/l; the product finally obtained is frozen and dried until the constant weight; and then the product is ground to get the natural wheat protein modified with the compound modification method. The modified wheat protein, as the additive of starch food, can replace the additive of inorganic salts and be used for food processing of flour powder, noodle, bread, etc.
Owner:XIAMEN UNIV

Comprehensive method for soil conditioning and restoration

The invention provides a comprehensive method for soil conditioning and restoration. The method comprises the following steps: before crops are planted or after fruit trees are harvested, oyster shellpowder, silicon-calcium-potassium-magnesium fertilizer, biological organic fertilizer, a biological control agent and ternary compound fertilizer are applied to soil; before the fruit trees are sprouted and bloomed, a macroelement water-soluble fertilizer and humic acid water-soluble fertilizer are applied to the soil; during a swelling period of young fruits of the fruit trees, silicon-calcium-potassium-magnesium fertilizer and a composite microbial bacterial liquid are applied to the soil; and during a fruit strengthening period of the fruit trees, high-potassium fertilizer and seaweed fertilizer are applied to the soil. The method is used for conditioning and restoring the soil, so that the pH of the soil tends to be neutral, and the acidification degree is obviously reduced; the organic matter content of the soil is obviously increased, the soil becomes loose and breathable, and the soil layer is deep and thick; and the heavy metal content in the soil is reduced, so that securityof the planted crops is improved, and the yield is improved. The method provided by the invention does not interrupt growth of the crops in the soil, enables the crops to grow healthily while conditioning and restoring the soil, and improves quality of the crops, so that economic benefits of growers are guaranteed.
Owner:四川微施地健土壤修复技术有限公司

Organic fertilizer for preventing continuous cropping obstacle of tomato and preparation method thereof

The invention discloses an organic fertilizer for preventing continuous cropping obstacle of tomato. The organic fertilizer is characterized by comprising the following components in parts by weight: 20-30 of wormcast, 25-35 of smashed corn straw, 25-35 of rice chaff and10-15 of vermiculite. The preparation method comprises the following steps: evenly mixing the smashed corn straw, the rice chaffand the vermiculite which are proportionally weighed and then moistening with water so that the water content of compositing material is 50-60%; then piling the mixed material into a trapezoidal stack with wide upside and narrow downside at room temperature or in a greenhouse or vinyl house for aerobic fermentation at a natural state or fermentation with zymophyte; and evenly mixing the completely fermented mixture of corn straw, rice chaff and vermiculite with the wormcast fully. The contents of organic matters in soil are improved by applying the organic fertilizer. Compared with the tomatowithout applying the organic fertilizer, the morbidity of the soil-borne disease of the tomato is reduced by above 80%, and the yield of the tomato is improved by about 20%. The organic fertilizer has the efficacies of modifying the soil, inhibiting propagation of pathogenic bacteria, increasing tomato yield, improving tomato quality and the like.
Owner:SHENYANG AGRI UNIV
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