102results about How to "Bring secondary pollution" patented technology

The invention discloses nanoscale zero-valent iron stable in air, wherein nanoscale zero-valent iron is taken as a core, and silicon dioxide is covered on the surface thereof. The preparation method comprises the following steps of: (1) adding isopropanol aqueous solution in ferrous sulphate, charging nitrogen, mechanically stirring for 15 to 30 minutes, dropping sodium borohydride solution containing sodium hydroxide while stirring, after that, adding polyethylene glycol, and continuing to react for 0.5 to 1 hours while stirring; (2) adding tetraethoxysilane in the solution, controlling the molar ratio of the sodium hydroxide to the sodium borohydride in the solution to be in a certain range, continuously stirring, and continuously charging nitrogen, after the reaction is finished, staying, vacuum-filtrating, then washing by absolute ethyl alcohol and deionized water respectively; and (3) vacuum-drying the obtained nano-iron to obtain the stable nanoscale zero-valent iron. The nanoscale zero-valent iron has a good inoxidizability in air; and the whole reaction process has the advantages of low material price, simple device, convenient operation, and easily-controlled and safe process condition.

The invention discloses a catalytic decomposition process of formic acid. The catalytic decomposition process comprises: catalytically decomposing formic acid in a to-be-deacidified material into CO and H2O or CO2 and H2 through a catalyst, wherein the formic acid content in the to-be-deacidified material is less than or equal to 1 wt%. According to the present invention, a small amount of the formic acid contained in alcohols, ethers, esters and other organic products is decomposed, such that the advantages of simple process, less investment, low energy consumption, low cost and product quality improving are achieved, and the difficultly-treated secondary pollution cannot be generated to the original product and the environment.

The invention relates to a method for preventing and controlling water bloom pollution organisms in eutrophicated water body, which comprises the following step: according to the hydrological condition and water bloom condition of the water body, spraying natural plant algae inhibitor into the water body, wherein the natural plant algae inhibitor comprises the following components in percentage by mass: 60 to 80 percent of water leaching extract of hairyvein agrimonia herb and bud, 10 to 20 percent of vitamin C, 5 to 10 percent of amino acid and 5 to 20 percent of citric acid. The biological algae inhibitor used by the method is natural plant extract, can be biodegradable in a short period, and has the half-life period about 7 days proved by experiments, so the biological algae inhibitor cannot bring about secondary pollution to the environment, and dose not have post-treatment problem; moreover, the biological algae inhibitor has low price which is only dozens of yuan per kilogram, and is suitable for popularization and promotion.

The invention relates to a petroleum-degrading bactericide and also relates to a preparation method of the petroleum-degrading bactericide. The preparation method of the petroleum-degrading bactericide comprises the following steps: (1) performing enlage cultivation on such bacteria as caulobacter segnis, candida parapsilosis, brachybacterium phenoliresistens, arthrobacter globiformis and sporidiobolus salmonicolor till the concentration of the bacteria is 10<9>-10<10> cfu/g, and uniformly mixing according to the mass ratio of 3: 2: 2: 1: 1 to obtain a mixed culture; (2) fermenting the mixed culture in a liquid fermentation culture medium for 48-60 h; (3) carrying out centrifugal separation to obtain thick strain cells; (4) uniformly mixing the thick strain cells with a 0.9% NaCl solution and a sea mud leachate; (5) adding nutrient substances, and then preserving at 4 DEG C in a sealed manner. The petroleum-degrading bactericide is high in petroleum degradation rate.

The present invention discloses a modified nanometer chlorapatite and a preparation method thereof, wherein the modified nanometer chlorapatite comprises nanometer chlorapatite and sodium lauryl sulfate, the sodium lauryl sulfate is modified on the nanometer chlorapatite surface, and a mass ratio of the sodium lauryl sulfate to the nanometer chlorapatite is 7-15:1. The modified nanometer chlorapatite preparation method comprises: under a stirring condition, adding a CaCl2 solution to a sodium lauryl sulfate solution in a dropwise manner, adding a Na3PO4 solution to the obtained mixed solution in a dropwise manner, and adjusting the pH value to 8.0-10.0 so as to prepare the product. The modified nanometer chlorapatite the present invention has advantages of large specific surface area, good dispersion property, high stability, and the like. In addition, the modified nanometer chlorapatite preparation cost is low, no secondary pollution is generated to the environment, and the method is suitable for large-scale use.

The invention discloses a bio-based methanol gasoline composite auxiliary and a bio-based high-proportion methanol gasoline. The bio-based methanol gasoline composite auxiliary disclosed by the invention comprises the following eight additives with different effects and functions: 25-35% of a solubilizing cold starting agent, 12-20% of an anti-explosion gas resistance-reducing agent, 3-5% of an emulsifying and water-melting agent, 2-3% of an anti-corrosion inhibitor, 4-6% of an anti-swelling and degumming agent, 5-6% of a detergent dispersant, 16-25% of an oil product stabilizer and 10-20% of a power reinforcer, so that the respective advantages of all the functional additives are fully realized and the deficiencies in the functions are further overcome. The invention also relates to the bio-based high-proportion methanol gasoline which comprises 85-95% of bio-methanol or anhydrous industrial methanol, 4.2-14.5% of bio-based methanol gasoline component oil and 0.5-0.8% of the bio-based methanol gasoline composite auxiliary. The bio-based high-proportion methanol gasoline disclosed by the invention solves 24 technical difficult problems in eight major types in using process of methanol gasoline and improves the various performances of the high-proportion methanol gasoline.

The invention discloses a mechanical algae removing device for floating algae in water channels. The device comprises a totally rectangular frame; a plane of the frame faces a water flowing direction;the frame is aslant arranged in a manner of left-low and right-high; the top of the frame is fixedly connected with a mounting frame after being bent to the right side; a motor speed reducer is arranged on the right side of the mounting frame; a power output end of the motor speed reducer is in transmission connection with a transmission chain wheel through a driving chain; the driving chain wheel, a first driven chain wheel, a second driven chain wheel and a third driven chain wheel are in transmission connection through at least two traction chains; an algae intercepting mesh is arranged between two adjacent traction chains; spraying systems towards water tanks are respectively arranged in the traction chains on the mounting frame; and the parts, below the motor speed reducer, of the algae intercepting meshes are positioned between the spraying systems and the water tanks. The device has the characteristics of light structure, high rigidity, good stability, convenience for installation and disassembly, high cost performance, excellent algae removing effect and incapability of causing secondary pollution to water sources.

The invention discloses a repairing method of low-valence heavy metal polluted soil. The repairing method comprises: (1) taking water as an eluting agent, and injecting the water into the low-valence heavy metal polluted soil through an injection well; extracting an eluting solution containing rich low-valence heavy metal from the soil through an extracting well; collecting the eluting solution and carrying out sedimentation; extracting supernatant into a treatment tank; (2) directly adding polyglutamic acid-chitosan gel into the treatment tank, and stirring and adsorbing for 3 hours or more; after carrying out solid-liquid separation, recycling a treatment solution and pumping the treatment solution into the injection well; taking the treatment solution as an eluting agent for continually eluting the soil. According to the repairing method of the low-valence heavy metal polluted soil, the low-valence heavy metal in the soil can be efficiently removed, and secondary pollution to the environment is not caused; a macromolecular material has the advantages of biodegradability, biological compatibility and the like, and can be widely applied to the field of environment protection.

The invention discloses a method for improving the fiber strength of waste paper with low lignin content by using cellulase/amino acid modification and the paper prepared by the method. The method comprises the following steps: pulping waste paper to obtain pulp, adding cellulase and amino acid into the pulp, adjusting the pH value to 5-8 and reacting at 40-60 DEG C for 40-70 min; after the reaction is completed, washing the filtrate with water until colorless, and then pulping and performing papermaking. As that cellulase is used for treating the fiber, the fiber becomes soft and plastic, andthen pulping can significantly improve the fine fiber of the fiber, increase the binding force between the fiber, the amino group in the amino acid is combined with the hydroxyl group on the cellulose by the hydrogen bonding force, the amino acid is grafted onto the cellulose chain, so that the carboxyl group content in the slurry is increased, and the swelling ability of the fiber is increased.Compared with the unmodified fiber, the physical properties of the paper produced by cellulase/amino acid treatment are greatly improved, and the method was simple, green, pollution-free and easy forindustrial production.

The invention belongs to the technical field of sewage treatment and particularly relates to a sewage treatment agent which is prepared from the following raw materials in parts by weight: 15-25 parts of polyferric chloride, 10-30 parts of starch acetate, 3-11 parts of tannin, 12-28 parts of rice straw, 5-20 parts of fly ash and 5-13 parts of lipase. With scientific and reasonable cooperation of the raw materials and under the synergistic effect of the components, the sewage treatment agent provided by the invention has a good flocculation effect, and realizes a remarkable effect of eliminating COD, soluble inorganic matters, organic pollutants, heavy metals and other harmful particulate matters in sewage; and the water quality completely reaches the discharge standard.

The invention discloses a repair method for hexavalent chromium contaminated soil. The repair method includes steps of (1), injecting water into the hexavalent chromium contaminated soil via an injection well, collecting eluting solution with enriched hexavalent chromium ions via an extraction well, carrying out sedimentation on the eluting solution and extracting supernatant into a treatment tank; (2), adding polyglutamic acid-polylysine-tannic acid gel into the treatment tank, carrying out adsorption treatment on the polyglutamic acid-polylysine-tannic acid gel, stirring and adsorbing the polyglutamic acid-polylysine-tannic acid gel for 3 hours, filtering the polyglutamic acid-polylysine-tannic acid gel, pumping filtrate into the injection well, continuing to elute the soil and reusing the polyglutamic acid-polylysine-tannic acid gel after adsorption treatment is carried out on the polyglutamic acid-polylysine-tannic acid gel. The water is used as an eluting agent. The repair method has the advantages that the hexavalent chromium ions in the soil can be removed efficiently, secondary environmental pollution can be prevented, biological high-polymer materials are biodegradable and biocompatible, the repair method can be widely applied to the field of environment protection, and the like.

The invention belongs to the technical field of water quality purification for aquaculture ponds, and specifically relates to a water quality purifier for aquaculture ponds, and also relates to a preparation method of the water quality purifier for aquaculture ponds. The water quality purifying agent for aquaculture ponds of the present invention is prepared from the following components: potato leaves, dandelion, glutinous rice flour, purslane, white myrtle, attapulgite, fly ash, toon bark, humic acid, xanthan gum . The advantage of the present invention is that the water purifying agent prepared by the present invention can effectively purify pond water without causing secondary pollution.

The invention relates to the field of chemical engineering separation and particularly relates to a self-assembled magnetically modified flocculant for separating microalgae and a preparation method and an application thereof. The flocculant is prepared by mixing aminomethylated tannin powder, magnetic particles and water in a ratio of 0.2mg: 0.01g: 1ml to 10mg: 0.5g: 1ml. By using Fe3O4 magnetic particles as nanoscale magnetic particles which are easily assembled with aminomethylated tannin, an assembled magnetic medium has a flocculating performance 5-10 times higher than that of the conventional flocculant but cost 1/10 that of the conventional flocculant.

The invention discloses an algae removal and control method for a low-speed small watershed. The method comprises the following steps: fishing at least 60% of algae in water; arranging a plurality ofgabion boxes filled with iron-carbon micro-electrolysis fillers along the periphery of the bank of the fished water area to remove phosphorus in the water; laying a sunshade net at 0.5 m above the water surface, and carrying out shading treatment for 10 days to inhibit growth of algae; mounting an aeration device so that aeration is started after shading is finished, and dissolved oxygen in wateris increased; uniformly throwing nitrifying bacteria into the water area for degrading ammonia nitrogen in the water by the nitrifying bacteria under an aerobic condition; uniformly spreading a phosphorus-accumulating bacterial agent to the water area for sucking phosphorus in the water into the body by the phosphorus-accumulating bacterium agent under the aerobic condition; by avoiding aeration positions, adding daphnia magna into a water area. Physical algae removal and biological algae removal methods are combined, so that the method is simple and easy to operate, takes effect quickly, doesnot bring secondary pollution to the environment and has few remaining problems.

The invention discloses a preparation process of a catalyst for deacidification of organic compounds. The preparation process comprises: preparing a catalyst carrier, wherein at least four of Al2O3, CaO, MgO, La2O3, Ce2O3, TiO2, ZnO, SeO and SnO are used as raw materials to prepare the catalyst carrier; preparing an impregnation solution, wherein the impregnation solution is prepared from more than three materials selected from nickel nitrate, cobalt nitrate, copper nitrate, magnesium nitrate, zinc nitrate, lanthanum nitrate and cerium nitrate, and the total concentration of the impregnation solution is 10-25%; impregnating, wherein the carrier is impregnated in the impregnation solution; and carrying out calcination decomposition on the impregnated carrier at a temperature of 400-550 DEGC under the protection of an inert gas so as to prepare the finished catalyst. According to the invention, a small amount of formic acid contained in alcohols, ethers, esters and other organic products are decomposed, such that the preparation process has characteristics of simple process, low investment, low energy consumption, low cost and improved product quality, and cannot cause difficultly-treated secondary pollution to the original product and the environment.

The invention relates to a comprehensive treatment method of aquaculture sewage. The comprehensive treatment method includes: allowing the aquaculture sewage generated by an aquaculture pond to pass a grille and then enter a precipitation and filtration tank from the water outlet of a sewage collecting tank through a pipeline; evenly mixing the fermentation liquor of spirulina metabolite, enteromorpha prolifera powder and the like and sweet potato powder according to the mass ratio of (12-15):(2-3):(5-6) to obtain a mixture; adding the mixture into the precipitation and filtration tank, stirring, standing for 2-3 hours, filtering the upper-layer seawater in the precipitation and filtration tank through a filtering screen, and pumping the filtered seawater into the aquaculture pond for aquaculture, wherein the mass ratio of the mixture to the aquaculture sewage is 1:(100-150); allowing sludge precipitated to the bottom of the precipitation and filtration tank to enter sludge drying equipment through a sludge pump, dewatering the sludge, and using the dewatered sludge as fertilizer for a seawater pond or as farmland fertilizer after being desalted. The comprehensive treatment method is capable of effectively degrading aquaculture pollution, low in cost and capable of reasonably utilizing the aquaculture sewage.

Provided is a sedum plant roof soilless greening system. A regenerated plant blanket serves as a soilless greening planting substrate and a seedling substrate, the substrate is mainly composed of plant fibers, animal fibers and artificial fibers are added, and the soilless substrate is free of harmful matter, is clean and environmentally friendly and does not cause secondary pollution. Sedum plants have the advantages of being resistant to heat, resistant to drought, resistant to low temperature, extensive in management and the like. Seeding construction of the system is achieved by paving the seedling substrate for seedling directly on a leveled ground or a roof, and three seedling methods are adopted for seedling. A sedum plant soilless lawn blanket (1) and a soilless greening planting substrate (2) are paved on the roof, and the sum of the thickness of the paved planting substrate and the thickness of the lawn blanket is no less than 5-6cm. After the sedum plant soilless lawn blanket (1) is paved on the soilless greening planting substrate (2), irrigation tubes (10) can be laid on the sedum plant soilless lawn blanket (1), a microcomputer automatic irrigation system guarantees normal growth of soilless plants on the roof, and a fertilization pool is arranged in the sedum plant roof soilless greening system so as to fertilize a lawn regularly and quantitatively.

The invention relates to the field of chemical engineering separation and in particular relates to a self-assembled quaternary ammonium tannin magnet modified flocculant for collecting microalgae as well as a preparation and application of the flocculant. The flocculant is prepared by mixing quaternary ammonium tannin powder, magnetic particles and water in the ratio of from 0.1mg: 5mg: 1ml to 10mg: 200mg: 1ml. The adopted Fe3O4 magnetic particles are at a nano scale and are assembled with the active groups on the quaternary ammonium tannin at the surface; the assembled magnetic medium has a flocculation performance 10-20 times better than that of a traditional flocculant and an applicable PH range (4.0-13.9) wider than that of the traditional flocculant, but the production cost of the flocculant is 1/5 that of the traditional flocculant.

The invention discloses a biology treating agent for inhibiting water eutrophication and a preparing method thereof. The biology treating agent is prepared from, by mass, 8-15 parts of radix mirabilis, 5-10 parts of clove, 3-7 parts of Xanthium sibiricum, 30-45 parts of modified diatomaceous earth, 40-50 parts of poly aluminum ferrous chloride, 12-15 parts of ferric sulfate, 12-15 parts of trichloro-isocyanuric acid, 20-25 parts of potassium citrate and 25-30 parts of disodium edetate dihydrate. By means of addition of the radix mirabilis, the clove and the Xanthium sibiricum and calcination treatment, the adsorption property of the modified diatomaceous earth and effects such as coagulation and electrical neutralization of polycation are effectively brought into play, alumen ustum is large and compact, the sedimentation speed is high, the effects of removing suspended substances like blue-green algae, turbidity, nitrogen and phosphorus and the like are remarkable, treated water is transparent, the water quality and the acid-base property are stable, and the biology treating agent has effects of many kinds of agentia such as a corrosion inhibitor and bactericide, so that water eutrophication is prevented.

The invention relates to a leakage detection process of an automobile part and specifically relates to a diesel-engine air valve and cylinder head seat retainer leakage detection process and repairing strategy and belongs to the technical field of diesel-engine production. Steps of the detection process include blocking, air inflation to a workpiece, leakage rate detection and result judgment. The invention also discloses an air value and cylinder head seat retainer repairing strategy which includes kerosene dropping detection, workpiece replacement or workpiece cleaning, leakage detection, replacement of all air valves and air-valve size measurement, leakage detection, air-valve seat-retainer size measurement and cylinder head replacement. The diesel-engine air valve and cylinder head seat-retainer leakage detection process and repairing strategy have the advantages of being accurate in judgment, zero in workpiece pollution, simple to operate and visible in result and the like. Timely fault finding and processing of an assembly line are facilitated so that the product quality is ensured.