55results about How to "There is no problem of secondary pollution" patented technology

The invention discloses an on-site construction method of a cold recycling asphalt pavement. The on-site construction method comprises the following process steps: digging out used materials of the asphalt pavement by a pavement milling and planing device; performing continuous circulating crushing and screening on the used materials of the asphalt pavement by a crushing and screening device; placing the crushed and screened used materials of the asphalt pavement into a finished product hopper, mixing emulsified asphalt with water in a proportion of 1: 1, blending with the used materials of the asphalt pavement in the finished product hopper, then adding a mixture of cement and ore powder to form an asphalt mixture; laying the asphalt mixture on a base layer of the pavement in a slow, uniform and continuous way, completing the compaction of a recycling asphalt mixture through three rolling stages, namely initial rolling, re-rolling and final rolling; and standing and curing the rolled base layer of the cold recycling asphalt mixture for 10-14 days. According to the method disclosed by the invention, the proportion of one-time cold recycling is high, the economic benefits are higher, the problem of secondary pollution is avoided, and the method is a green and environment-friendly preparation method.

The invention relates to a pyrolysis remediation method of chromium-containing soil, which comprises the following steps of: selecting dewatered sludge or other organic matter of an urban sewage treatment plant as reducer, mixing chromium-containing soil and the organic matter by a certain ratio, feeding into an electrical furnace, and carrying out reductive pyrolysis reaction in reducing atmosphere. The method can detoxicate contaminated soil at high efficiency without destroying the basic structure and the property of the soil, and has the advantages of short pyrolysis time, sufficient utilization of other organic wastes such as the excess sludge of the sewage plant, and significant economical and environmental effects.

The invention discloses a novel process for treating fermented waste gas of amino acid by utilizing a spray cooling method. The fermented waste gas is conveyed to a gas-liquid separator by a fan, the separated wastewater with high COD enters a mash tank for recycling, gas enters a spray tower, and the condensed low-temperature gas enters the next working procedure through the upper part of the spray tower; the lower part of the spray tower is provided with a water tank, spray water subjected to temperature rise preliminarily filters solid purities obtained by the washing during the spraying in the water tank, then the filtered spray water enters a heat exchanger after the filtration through a filter to perform heat exchange with cooling water produced by a cooling tower, and the spray water is sent into the spray tower after the temperature of the spray water is reduced once again; and the produced condensed water and the spray water are mixed during the temperature reduction, then are drained out of the water tank, and are sent into a wastewater treatment plant. The process is simple, has convenient operation, ensures that the condensed water can be repeatedly used, has no problem of secondary pollution, and solves the technical problems of high water vapor content and large subsequent process load in the gas treated by the prior art.

The invention discloses a GO (graphene oxide) and g-C3N4 composite modified membrane material. A preparation method includes steps: activating an original membrane to recover original membrane flux; adding a surfactant into GO and g-C3N4 mixed dispersion liquid to obtain mixed liquid; soaking the activated original membrane into the mixed liquid to realize ultrafiltration adsorption, and soaking the membrane into aniline hydrochloric acid solution; taking out after soaking is finished, and soaking in hydrochloric acid solution of ammonium persulfate immediately to enable interface polymerization reaction; finally, drying the membrane to obtain the composite modified membrane material. By an ultrafiltration adsorption and interface polymerization combined modification method, GO and g-C3N4are combined for surface composite modification of the membrane material, and a visible light responsive catalytic modified membrane is developed. The novel modified membrane is low in preparation cost and recyclable, pollution resistance is remarkably improved, firmness in modifying agent and photocatalyst loading is achieved, the visible catalytic performance and hydrophilic performance are remarkably enhanced, the forbidden bandwidth of a membrane function layer is decreased, the problem of secondary pollution is avoided, and a promising application prospect is achieved.

The invention discloses an environment-friendly comprehensive treatment method for household garbage and waste oil and fat. The method comprises the following steps of: (1) sorting the household garbage, breaking the household garbage into garbage particles through a breaking machine, and conveying the garbage particles to a feeding hopper through a spiral transmitting machine; (2) carrying out the procedures of pre-heating, drying and dry distillation on the garbage particles to obtain charcoal through a sealed spiral conveying machine; (3) separating part of waste oil and fat into two parts through an oil and water separating system, and burning one part of waste oil and fat as fuel through a hot blast stove so as to perform drying and dry distillation on the garbage and convert the garbage into charcoal; and (4) treating the other part of wastewater through a biochemical wastewater treatment system, and discharging the processed wastewater reaching the standard. The comprehensive treatment method disclosed by the invention is a hazard-free, reducing and recycling technology for the household garbage, is free from pollution in processing, low in cost, good in practicability and high in operability, and has remarkable social and economic benefits.

The invention discloses a method for processing waste water containing phenol generated in the production process of metlbond resin; the method comprises the following steps: firstly the pH value of waste water is adjusted to 11.5 to 14 to enable the phenol in the waste water to exist in a phenol sodium type, and then the phenol in the waste water is separated by rectification. The content of phenol in the waste water containing phenol is from 20000 ppm to 50000 ppm, the pH equals to 4, and the COD equals to 140000ppm. The rectification technology of the waste water has stable production process, low energy consumption, compact equipment installation, simple operation and easy process control. The rectified waste water has strong biochemical performance, the difficulty of the biochemical treatment of the subsequent work procedures is lowered, and the capability of biochemical treatment is improved. Compared with the common method, the invention causes no secondary pollution. The waste water processed by the method of the invention has the phenol removing rate of higher than 95 percent and the rectified outlet water BOD/COD equaling to 4, belongs to the easy biochemical treatment method of the waste water containing phenol, and changes the condition of the serious pollution caused by the waste water containing phenol of the metlbond resin industry.

The invention discloses application of a hollow glass bead biological membrane carrier in wastewater treatment, which includes that a hollow glass bead is added in a biological membrane reactor for inoculating active sludge, the biological membrane reactor is started to intake water and aerate so as to enable the hollow glass bead to contact with microorganisms in the biological membrane reactor fully, a biological membrane is generated on the surface of the hollow glass bead, and the biological membrane is used for perform wastewater treatment. The weight of a single hollow glass bead is less than 0.001g, grain size of the single hollow glass bead is 0.01-0.075mm, and density of the single hollow glass bead is 180-190Kg.m-3. The hollow glass bead biological membrane carrier is light in weight, small in grain size and density, stable in chemical property and high in mechanical strength, has good sealing performance, wind pressure resistance and corrosion resistance, is not easy to break and good in mobility, can form a turbulence state with the microorganisms, simultaneously can resist strong hydraulic shear action, facilitates the wastewater treatment, and accelerates forming speed of the biological membrane and starting time of the reactor.

The invention belongs to the technical field of growth promotion for astragalus membranaceus. In order to achieve the purposes of promoting growth and improving quality of astragalus membranaceus, growth promotion endophytes and a growth promotion method and the application of the method are provided. The endophytes are sphingobacterium strain KSCO1 and pseudomonas poae strain KSCO2; the aspergilusniger is preserved at the Center of General Microbiological Culture Collection and Management Committee of China on November 21st, 2017. The preservation number is CGMCC No.14945, CGMCC No.14946. 2-10Mum E-2-hexanol and 5-625Mum n-hexane promote the growth of KSC01, and 25-625Mum n-hexane promotes the growth of KSCO2. A green and environment-friendly pesticide component without medicinal materialresidual for the planting astragalus membranaceusof Chinese medicinal material is provided.

The invention relates to a method for treating domestic garbage, which sequentially comprises the following steps of: (1) homogenizing, namely homogenizing the domestic garbage by using a homogenizer until the domestic garbage has the particle size of 50 to 200 meshes; (2) fermenting, namely feeding the homogenized garbage into a fermentation tank and performing anaerobic fermentation at the temperature of between 20 and 35 DEG C for 10 to 40 days; (3) mixing to form mud balls, namely premixing the fermented garbage mixed liquid and dry powder in a weight ratio of (8-14):100, and rolling by using a balling disc to form the mud balls with the size of 5 to 12mm; and (4) firing, namely heating the mud balls to the temperature of between 900 and 1,300 DEG C through a kiln, and firing to form ceramsites. Separation is not needed in the method, residual garbage is avoided, restaurant-kitchen garbage, excrement garbage and garbage leachate can be completely comprehensively utilized and innocently treated, and the problem of secondary pollution of the garbage is solved.

The invention discloses a desulphurization phosphomolybdic acid catalyst and its preparation method. The catalyst is synthesized through a scientific preparation technology of main raw materials comprising molybdophosphoric heteropoly acid having a Keggin structure, phthalic anhydride, cobalt chloride and industrial grade urea. Molybdophosphoric heteropoly acid used in the invention is friendly to the environment, and the adoption of the solid phase synthesis method avoids the use of an organic solvent in the reaction process, so the preparation process of the phosphomolybdic acid catalyst does not pollute the surrounding environment. The use of the molybdophosphoric heteropoly acid in the synthetic process greatly improves the catalyst activity. Compared with present cobalt phthalocyanine catalysts, the desulphurization phosphomolybdic acid catalyst has the advantages of good selectivity, high catalytic activity, removal of inorganic sulfur and organic sulfur, and high desulphurization efficiency (not less than 99%). The desulphurization phosphomolybdic acid catalyst can be widely applied to the desulphurization of various high-H2S gases comprising semi-water gas, natural gas, ammonia synthesis raw gas, coke-oven gas and the like, and the desulphurization purification of S-containing gases and low-viscosity liquids.

The invention discloses a pretreatment device of a sample for measuring the secondary electron emission characteristic of a material, which comprises a vacuum cavity and a vacuum pump, and also comprises a heating device, wherein the heating device comprises a bottom barrel and a gland; a driving part, wherein the driving part is used for driving the gland to move in the direction of the opening end of the bottom barrel; a sample storage platform, wherein the sample storage platform is positioned in the space enclosed by both the bottom barrel and the gland when the gland is buckled on the opening end of the bottom barrel; a grabbing and transferring part and a gate part, wherein the gate part is used as a passage outside the closed space and vacuum cavity; the heating device is used for heating the space enclosed by both the bottom barrel and the gland. The pretreatment device not only can effectively eliminate the influence of the sample surface adsorption gas and volatile organic contaminants on the measurement of the secondary electron emission characteristic of the material, and meanwhile, the structure design can effectively prevent secondary pollution when the sample is transferred from the pretreatment cavity to the measuring cavity.

The present invention relates to a solid catalyst, a preparation method and applications thereof, wherein the preparation method comprises: coating a porous ceramic substrate with a transition metal nanometer oxide. A main purpose of the present invention is to provide a novel solid catalyst and a preparation method thereof so as to solve the ozone escaping problem in different industrial environments. According to the present invention, the solid catalyst is used to efficiently and catalytically decompose ozone so as to eliminate the ozone, wherein the solid catalysts coated with different coating substances are tried to eliminate the ozone; and the solid catalyst cannot shed and can maintain the efficiently catalytic decomposition of ozone in the continuously-harsh industrial environments (such as high temperature, high flow rate, high pressure and high humidity).

A stabilizing agent used for restoration of cadmium-polluted soil is disclosed. The stabilizing agent includes, based on the mass of the polluted soil, 1-2% of modified attapulgite, 2-3% of sodium sulfide and 1-3% of calcium dihydrogen phosphate. The stabilizing agent is added into the cadmium-polluted soil firstly and stirred to fully mix the stabilizing agent with the soil, water is added, stirring is performed continuously, the water content of fields with the soil is kept and maintenance is performed at room temperature. The stabilizing agent is cheap, easily available and good in effects and free of secondary pollution, does not greatly change the pH value of the polluted soil, can increase water retention and aeration properties of the soil and facilitates subsequent utilization of the soil.

The invention relates to a catalysis and oxidation treatment method for wastewater containing sulfide or thiosulfate, which is used for completely oxidizing sulfide and/or thiosulfate into sulfate at normal temperature and pressure by using gas as an oxidant and using a compound containing trivalent bismuth as a catalyst. The catalyst used in the invention can be recycled, which not only solves the problem that sulfide and/or thiosulfate can not be oxidized into stable sulfate by using a traditional catalytic air oxidation method, but also is beneficial to environmental protection, decreasing the investment, saving the operation cost, and realizing simple operation. Therefore, the invention can be widely applied to treatment on wastewater containing sulfide and/or thiosulfate or alkali waste liquid.

The invention discloses a process and method for treating high-concentration sewage with low-temperature plasma. The high-concentration sewage is filtered and then sent to a sewage storage pool. After being pressurized, the high-concentration sewage is sent to an atomizing nozzle, atomized by a mixed gas, and then sprayed into an electrode. In the discharge area, the high-voltage pulse voltage generated by the high-voltage pulse generator is discharged at the electrode, which accelerates the electrons and forms high-energy free electrons that do not need to be shielded. The high-energy free electrons cause the water molecules in the high-concentration sewage to undergo excitation, cracking and ionization, and generate free carboxyl groups. Radical OH, O3, H2O2, carboxyl free radicals OH, O3, H2O2 bombard the C-C bond and unsaturated bond of organic matter in high-concentration sewage, making the organic matter in high-concentration sewage break bonds and open rings, and make high-concentration sewage The large molecules of organic matter in the medium become small molecules, and the purification of high-concentration sewage is realized. The invention has advanced process method, has the advantages of high processing efficiency, simple structure and low energy consumption, and can improve the economic benefits of enterprises.

The invention discloses a treatment method for exhaust gas of a chlorohydrination epoxypropane device. The treatment method comprises the following steps: washing a chlorohydrination organic waste gasof the epoxypropane device through an alkali washing tower to remove an acid gas; then introducing a safety water seal tank provided with an air inlet, and mixing the chlorohydrination organic wastegas with supplementary air to enter a fan; detecting the content of a combustible gas of the gas in an outlet line of the fan through a VOC online gas detector, and conveying to a caustic soda flake device safety water seal tank after measuring through a remote transmitting flow meter; and then entering a molten salt furnace to be used as combustion-supporting air to perform combustion. The treatment method further comprises an interlocking control method for determining the safety while working. The process refers to dilute a large amount of the exhaust gas to reach less than 25% of the explosive limit concentration of each component of the exhaust gas, and then take the exhaust gas as the combustion-supporting air of an incinerator to be incinerated, thereby not only being safe in operation, but also being capable of completely treating the waste gas effectively, and even being capable of recycling heat or saving fuel in specific combustion equipment.

The invention discloses a cobalt-polluted soil conditioner; the cobalt-polluted soil conditioner is prepared from, by mass, 24-28 parts of modified diatomite, 16-19 parts of sodium sulfide, 9-12 parts of monopotassium phosphate, 7-11 parts of volcanic glass rock, wherein the modified diatomite is prepared by performing superfine grinding treatment on pumice powder, stirring with nitric acid, filtering, washing, drying, adding sodium tartrate and mixing, performing hot ultrasound wave treatment, filtering, washing, drying, grinding and sieving; crushing every raw material, sieving, mixing and evenly stirring the raw material. The conditioner can significantly reduce the cobalt content in the heavy metal cobalt-polluted soil; when the conditioner is applied to the soil improvement of which cobalt content is 238.4 mg/kg, the cobalt removal rate is 85.5-96.3%, and the conditioner is free from the secondary pollution.

The invention discloses a cobalt polluted soil improver and a preparation method thereof. The improver is prepared from the following raw materials in parts by mass: 24-28 parts of modified ground pumice, 16-19 parts of ferrous sulfide, 9-12 parts of calcium superphosphate and 7-11 parts of volcanic glass, wherein the modified ground pumice is formed by carrying out micro-crushing treatment on ground pumice, adding nitric acid and carrying out stirring treatment, filtering, washing, drying, adding sodium tartrate and mixing, carrying out heat ultrasonic treatment, filtering, washing, drying, grinding and sieving, crushing all the raw materials, filtering, mixing and uniformly mixing. According to the improver disclosed by the invention, the content of cobalt in heavy metal cobalt polluted soil can be remarkably reduced; and when the improver is applied to improvement of soil with the cobalt content of 238.4mg/kg, the removal rate of the cobalt is 85.5%-96.3% and a secondary pollution problem is not caused.