113results about How to "Improve degradation efficiency" patented technology

The invention relates to the technical field of harmless treatment of polluted soil microorganisms. In particular, it relates to a microbial harmless treatment method for oil and gas field drilling waste mud. Aspergillus oryzae, Bacillus subtilis, Pseudomonas fluorescens, Acinetobacter calcoacetate and Rhodococcus erythrococcus are respectively cultured in test tubes, shake flasks, Seed tank culture, fermenter culture, and sterilized solid medium culture become solid bacterial agents for production, which are mixed in proportion to solid mixed bacterial agents for production, and the bacterial agents are connected to oil and gas fields to discharge waste mud during drilling, and after uniform stirring, Control the cultivation temperature and time of the microbial harmless treatment of mud, and the above treatment process can be carried out in the abandoned mud pool for drilling in oil and gas fields. Through the growth, reproduction, degradation and transformation of microorganisms in waste mud, the mud can be detoxified, degummed, desalinated and dehydrated, so that the polluted soil environment can be biorestored and the ecological environment can be restored.

The invention relates to a preparation method for magnetic nano biological microspheres for remedying soil polluted by organic chloride durably. The preparation method comprises the following steps of: (1) preparing nano Fe3O4 particles with the surfaces adsorbing amino by a coprecipitation method; (2) dissolving chitosan into an acetic acid solution to form a homogeneous transparent colloidal solution, and mixing and stirring the solution and the nano Fe3O4 particles to obtain the magnetic nano-particles; (3) adding the prepared magnetic nano-particles into a buffering solution of citric acid and performing ultrasonic dispersion to obtain magnetic fluid; and (4) adding the magnetic fluid into a bacterial solution, adding cross-linked fluid dropwise, performing adsorption-cross-linking, and performing solid liquid separation under the action of an external magnetic field to obtain the magnetic nano biological microspheres. The method is quick, simple, convenient and low in cost. The prepared magnetic nano biological microspheres have the characteristics of homogenous shape, large specific surface area, high microbial activity and the like and are applicable to degradation of organic chloride pollutant and in-situ remediation of polluted soil.

The invention relates to a bacillus subtilis ANSB01G CGMCC No. 4297 for simultaneously degrading zearalenone and cellulose and a culturing method thereof. The invention also relates to a method for degrading the zearalenone and the cellulose by using a fermentation liquor of a bacterial strain; by using the method, the degradation rate of the zearalenone can reach 83% while the zearalenone reacts with the bacillus subtilis for 72 hours; and the enzyme activity of the cellulose of the fermentation liquor of the bacillus subtilis is 198.9 U/g. The bacillus subtilis provided by the invention has the advantages of high activity, strong specificity, mild action effect and no damage to nutrition constituents in a feed during degrading the zearalenone; moreover, by using the bacillus subtilis, the cellulose can be also degraded to increase the feed conversion rate.

The invention discloses a method for preparing doped mesoporous titanium photocatalyst, which is to prepare the doped mesoporous titanium photocatalyst by using triblock copolymer, namely polyethylene glycol-polypropylene glycol-polyethylene glycol(P123), as a template agent, a tetrabutyl titanate as a titanium source, and a boron, nitrogen or tervalent titanium-containing compound as a doping element-containing precursor, synthesizing by a process of evaporation-induced self-assembly at a certain temperature and humidity, drying and roasting. The catalyst prepared by the method has high catalytic activity in visible light and can quickly degrade organic pollutants in dye waste water.

The invention relates to a method for biologically restoring soil polluted by high molecular weight polycyclic aromatic hydrocarbons, concretely a method for separating and screening efficient degrading bacteria complexes and applications thereof in a field polluted by polycyclic aromatic hydrocarbons. The method, utilizing PCR-DGG, comprises: rapidly determining relative advantage flora for degrading pollutants in a soil sample, separating and purifying the flora, optionally regrouping the flora, enlargedly culturing the flora, and re-putting the flora in to the long-term pollution soil containing high density and high molecular weight polycyclic aromatic hydrocarbons. By periodically adding a proper amount of nutrient elements with different ratio and controlling the humidity (40-60%), the advantage of the high efficiency degrading flora can be enduringly maintained. The method has high degradation efficiency, especially for the soil polluted by high molecular weight polycyclic aromatic hydrocarbons.

The invention relates to a method for degrading wastewater by adopting an active carbon-based microwave catalyst through catalytic oxidation under the microwave radiation. According to the technical scheme, the method comprises the steps of: using active carbon as a catalyst, or loading one or more metal oxides on the active carbon as a catalyst, then placing the catalyst in the organic wastewater, and degrading the organic wastewater by adopting the microwave radiation. The method provided by the invention can be used for continuously treating the wastewater through the microwave immobilizing catalyst. The method has the advantages of simpleness and easiness in operation, low investment and operation cost, small occupation area, thorough degradation, large range of concentration of degradable organic wastewater, and no secondary pollution, and is suitable for treating organic wastewater in industries such as printing and dyeing, papermaking, chemical engineering and pharmacy.

The invention discloses a technique for preparing oligosaccharide and Chitosan oligosaccharide. The technique takes the Chitosan oligosaccharide with the deacetylation degree between 70 and 95 percent as a raw material; and the oligosaccharide and the Chitosan oligosaccharide are prepared through the steps of dissolution, quick viscosity reduction of a non-specific enzyme, hydrolysis of chitoanase, adjustment of the pH of digest to between 5.5 and 7.5, filtration, film-method refining, spray drying and so on. The technique has the advantages of the enzyme preparation technique, and simultaneously has the characteristics of high degradation efficiency and transformation efficiency and low cost.

The invention discloses an arbuscular mycorrhizal phytoremediation (AMPR) method for polycyclic aromatic hydrocarbon polluted soil, and belongs to the technical field of polluted soil remediation. The method comprises the following steps: (1) inoculating glomus mosseae and other arbuscular mycorrhizal fungal agents to a surface soil layer (0 to 20cm) of the polycyclic aromatic hydrocarbon polluted soil; and (2) planting Medicagosativa L. and other leguminous plants, harvesting the plants after the plants grow for 60 to 80 days, collectively burning the plants after drying and transferring. The method has the advantages that the adopted arbuscular mycorrhizal fungus can easily symbiose with terrestrial plants, promotes the number and activity of rhizospheric microorganisms, and improves the degradation efficiency of PAHs; and the method has simple technical process, low cost, aesthetic property and safety and good remediation effect on the PAHs and other organic polluted soil, and is applicable to treatment of area source organic polluted soil.

The invention discloses a single-layer bismuth tungstate nano-sheet composite photocatalyst modified by carbon quantum dots, a preparation method of photocatalyst and an application. The composite photocatalyst comprises single-layer bismuth tungstate nano-sheets and the carbon quantum dots, the single-layer bismuth tungstate nano-sheets are modified by the carbon quantum dots, and the weight ratio of the carbon quantum dots to the single-layer bismuth tungstate nano-sheets is 0.03-0.05:1. The carbon quantum dots, hexadecyl trimethyl ammonium bromide, bismuth nitrate solution and sodium tungstate solution are mixed and react in a hydrothermal manner to obtain the composite photocatalyst. The composite photocatalyst has the advantages of wide visible light response range, high degradation efficiency, good photocatalyst stability and reusable performance and the like. The preparation method of the photocatalyst has the advantages that the preparation method is simple and convenient to operate, low in raw material cost and less in energy consumption, large-scale preparation can be achieved and the like. The composite photocatalyst belongs to green synthetic technique and can be used for treating antibiotic wastewater.

A chemical degradation method of polypropylene comprises the degradation by adding 0.01 weight percent to 0.2 weight percent of organic peroxide and 0.1 weight percent to 1.0 weight percent of nucleating agent into the polypropylene. The method can effectively improve the efficiency of degradation, increase the melt index of degraded polypropylene, improve the molecular weight distribution of polypropylene, and maintain the good mechanical performances at the same time.

The invention discloses a pyridine degradable bacteria and application thereof. The pyridine degradable bacteria are Shinella zoogloeoides BC026 CGMCC No.2224. Applying the inventive Shinella zoogloeoides BC026 in decomposition of pyridine in drain system, not only high decomposition efficiency is obtained, but also the inventive Shinella zoogloeoides BC026 has characteristic of distillage recycle, can exert important function in drain processing, impact endurance of the system is enhanced.

The invention discloses a rhodococcus strain C3. A preparation method of the rhodococcus strain C3 comprises the following steps of sucking an activated sludge sample from a wastewater biological treatment system of a coking plant to a fresh enrichment culture medium of phenol for shaking culture, wherein the inoculum concentration is 1%; after an enrichment bottle becomes muddy, taking a certain amount of the culture solution, inoculating a phenol liquid culture medium with increased concentration with the culture solution for culturing; in the same way, gradually increasing the concentration of phenol to 1000mg/L; inoculating an inorganic salt culture medium with the concentration of phenol being 1000mg/L with the strain enriched by the enrichment culture medium for domestication; and separating and screening a strain taking phenol as the unique carbon source and energy source from an isolation medium plate by adopting a dilution spread plate method and a streak plate A single colony of the strain is separated from an LB solid medium in a streaking manner, wherein the single colony is yellowish and semitransparent, has a neat edge and wet texture, and is easy to prick up; phenol, pyridine and o-cresol are taken as carbon sources, and the strain can degrade 1000mg/L of phenol in the inorganic salt liquid culture medium. The invention further provides a microbial agent taking rhodococcus strain C3 as the active component, and a preparation method of the microbial agent.

The invention discloses a method for treating domestic sewage by applying a light ceramic suspended filler moving bed, which comprises the following steps of: pumping low-concentration town sewage into a hydrolytic acidification tank by using a lift pump, maintaining the sewage in the hydrolytic acidification tank for 3 to 8 hours, and controlling the dissolved oxygen to 0.38-0.45mg/L; making the sewage to enter a suspended filler moving bed; under the action of aeration stirring of an aerator pipe, mixing the sewage and a suspended ceramic filler, and breeding microorganisms on the surfaces and pores of the suspended ceramsites; after film formation, forming aerobic, anoxic and anaerobic environment on the surfaces and in the pores of the suspended ceramsites, adsorbing organic matters in the sewage on the surfaces of the suspended ceramsites, and performing simultaneous nitrification-denitrification and simultaneous decarbonization-denitrification on the organic matters by the microorganisms in the biofilm; and finally, making the sewage enter a dosing and coagulating basin, adding a coagulant into the dosing and coagulating basin, fully reacting, and making the sewage enter an inclined-tube sedimentation tank for sedimentation. The method has the characteristics of short hydraulic retention time, land conservation, investment conservation and low operating cost.

The invention provides a preparation method of a zinc oxide nanorod/g-C3N4 nanosheet composite photocatalyst material. The zinc oxide nanorod/g-C3N4 nanosheet composite photocatalyst material is prepared by adopting melamine, zinc acetate dehydrate, sodium hydroxide, hexadecyltrimethyl ammonium bromide and absolute ethyl alcohol as main raw materials through a hydro-thermal synthesis method; zinc oxide in the composite material is a one-dimensional zinc oxide nanorod with uniform morphology; the morphology of g-C3N4 is a two-dimensional nanosheet structure. The product respectively degrades an organic pollutant rhodamine B under simulated sunlight and visible light (lambda is larger than 420nm), so that the photocatalyst material is proved to have an excellent photocatalytic performance. The morphology and the size of the zinc oxide nanorod prepared by the method are uniform, and the thickness of the g-C3N4 nanosheet is less, so that the zinc oxide nanorod and the g-C3N4 nanosheet are tightly combined, the migration of photo-induced electron is facilitated, and the photocatalysis efficiency is improved. The material has good response in ultraviolet and visible light areas, so that the material not only has a better application prospect on the environmental protection field such as water pollution control, but also has a better development prospect on developing and utilizing renewable resources such as solar energy.

The invention provides a nano-copper array cathode for reductive degradation of organic pollutants as well as preparation and application thereof. Under a condition of lower cathode constant electric potential, through one-step electrodeposition, nano-copper arrays are loaded on surfaces of substrate materials such as three-dimensional foam copper, the obtained nano-copper sheet arrays are uniformly distributed, tightly arranged and difficult to fall off; the dimension length of the nano-copper sheet is less than 500nm, the width is less than 100nm and the thickness is less than 10nm; the prepared nano-copper array cathode is applied to organic pollution water treatment, precious metal palladium with high price is replaced, so that the manufacturing cost of an electrode is greatly reduced while the degradation efficiency of the organic pollutants is improved at the same time. According to the nano-copper array cathode disclosed by the invention, the process is simple, raw materials are low in cost and easy to obtain, and the possibility is provided for magnification scale production.

The invention discloses application of copper-based amorphous alloy as a catalytic functional material in wastewater treatment and belongs to the fields of amorphous alloy materials and wastewater treatment. Atomic percent of Cu element in amorphous alloy ingredients is 30-80%, other alloy elements are one or several of Zr, Hf, Al, Ti, Ni, Ag, Nb, P, Sn, Zn and RE, and RE refers to rare earth element. The copper-based amorphous alloy shows excellent catalytic activity in the process of degrading wastewater, has quite high efficiency in degrading wastewater, is almost free of alloy mass loss caused by oxidation reduction in the process of wastewater degrading, can maintain amorphous structure of the copper-based amorphous alloy, shows excellent long-time stability and has great application prospect.

The invention discloses a modified biochar based composite Fenton catalyst and a pollution treatment method. The composite Fenton catalyst is characterized in the following steps: placed the biochar in a copper sulfate solution having a concentration of 10-50 mmol/L, stirring or oscillating the biochar and the copper sulfate solution for absorption for 180 min, carrying out centrifugation, and placing the mixture into a tubular furnace or muffle furnace, and carrying out heat treatment at 550-850 DEG C under nitrogen protection for 0.5-2 h to obtain the modified biochar; mixing the modified biochar and pyrite at a mass ratio of 1-5:1, and grinding the modified biochar and pyrite until the particle size is less than 0.15 mm to obtain the composite Fenton catalyst; and adding the composite Fenton catalyst of 10-60 g/L into wastewater containing organic pollutants in order, evenly stirring and mixing, adding persulfate of 3-15 mmol/L, and performing a Fenton oxidation reaction for 20-120min. The modified biochar based composite Fenton catalyst and the pollution treatment method can effectively improve the degradation efficiency of the organic pollutants.

The invention discloses a three-dimensional natural fiber spherical biofilm packing, which comprises a wooden frame and bamboo biofilm packing monomers, wherein the bamboo biofilm packing monomers are of hollow spheres woven by bamboo chips and are layeredly and serially fixed in the wooden frame; and a clearance is reserved between each two bamboo biofilm packing monomers. The packing has convenient transportation and installation and large specific surface area, and is not easy to be blocked; at the same time, in anaerobic and facultative aerobic microenvironments, the packing accelerates microorganism colonization, and greatly improves the startup time of a reactor and the degradation efficiency of pollutants; and the packing adopts natural raw materials, has low cost, is corrosion-resistant, and is an ideal, efficient, economical and environmentally-friendly natural biofilm packing.

The invention provides a method for treating organic waste water by catalyzing persulfate by means of microwave-ultraviolet coupling. The method comprises the following steps: adding the persulfate into the organic waste water, putting the organic waste water containing the persulfate into a container in a microwave generation device, wherein the container is internally provided with an ultraviolet light generation device, turning on the microwave generation device, using microwave to excite the ultraviolet light generation device, and degrading the organic waste water under the action of catalyzing and activating the persulfate by means of microwave and ultraviolet coupling. According to the method, the persulfate is catalyzed and activated by a microwave and ultraviolet coupling method so as to generate sulfate radicals, and an oxidization system based on the sulfate radicals is formed, so that organic pollutants in the waste water are effectively degraded; in the processes of catalysis and activation, metal ions are not dissolved out in the system, so that secondary pollution is avoided; furthermore, the method is higher in degradation efficiency of organic matters in the waste water under the acidic, neutral and alkaline conditions, so that the waste water can be stably treated under the conditions of multiple pH values.

The invention discloses an achromobacter xylosoxidans bacterial strain and application thereof for degrading o-aminobenzoic acid. The bacterial strain is (Achromobacter xylosoxidans) N4, the preservation registration number thereof is CGMCC No. 3632. The (Achromobacter xylosoxidans) N4 CGMCC No. 3632 can rapidly and efficiently degrade o-aminobenzoic acid and can be applied to biological treatment on indigo printing and dyeing waste water.

The invention discloses an ion exchange type COF-coated MOF/M composite material and a preparation method thereof, and the preparation method comprises the following steps: firstly synthesizing an MOF crystal material, then synthesizing a COF-coated MOF material, and finally introducing exchange metal ions to form the ion exchange type COF-coated MOF/M composite material. After the COF-coated MOF core-shell structure is synthesized, metal ions are fixed at nodes of the core-shell structure, so that the monatomic catalytic activity is exerted; MOF is coated with COF to form a COF-coated MOF core-shell structure, on one hand, a multi-stage pore channel structure is formed, a layer-by-layer progressive effect is achieved when pollutant small molecules are adsorbed, a nano confinement effect is formed in the middle of a sheet layer, and the catalytic performance is improved, and on the other hand, due to the fact that the stable shell structure MOF of the COF cannot cause structural collapse in the metal ion exchange process, and the shape of the original framework is maintained; when the ion exchange type COF-coated MOF/M composite material prepared by the method disclosed by the invention is used for catalyzing styrene degradation, the degradation efficiency is obviously improved by more than 30%.

The invention relates to a method for degrading pentadecafluorooctanoic acid or perfluorooctane sulfonate through irradiation. The method includes the specific steps that a 20 mg/L pentadecafluorooctanoic acid aqueous solution and a 20 mg/L perfluorooctane sulfonate aqueous solution are prepared respectively, the pH value is adjusted to be 3-13, nitrogen and oxygen are introduced or a tert butyl alcohol solution is added, and the mixture is irradiated by electron beams; the energy of accelerated electrons of an accelerator is 1.8 MeV, the intensity of electronic beam current is 0-10 mA, processing time is 60-120 s, and irradiation dose is 100-500 kGy. The method has the advantages that degradation efficiency is high, reaction speed is high, generated radicals are high in oxidization and reduction performance, the applicability range is wide, controllability is high, the method can be matched with other processing technologies in use so as to reduce cost and meet processing requirements, and the method is an efficient energy-saving water treatment technology. By treating pentadecafluorooctanoic acid or perfluorooctane sulfonate in water through the electron beam irradiation method, quick degradation and effective defluorination can be achieved, and application prospects are good.

The invention discloses a partial-reflux pressurized and aerated type plasma sewage treatment device. The device comprises a refluxing and pressurizing device and a plasma reactor. The device has the advantages of a wide application range, high treatment efficiency, low equipment cost, low operation cost, cleanliness, low price, stability in operation, and the like, can be applied to treating various degradation-resistant wastewater in a present environment, also can be used for solving the problem that the ammonia nitrogen content is increased after the wastewater is treated by a plasma technology, can become indispensable main force in sewage treatment and can be applied to treating various pollutant fields.

The invention relates to a nano core-shell compound and composite fiber membrane for photothermal enhanced degradation of chemical warfare agent simulants and preparation methods and application of the nano core-shell compound and composite fiber membrane. According to the nano core-shell compound, a photothermal agent is adopted as a core, and MOFs are adopted as a shell, wherein the photothermalagent is dopamine melanin nanoparticles, the diameter of the particles is 150-400 nm, and the MOFs are UiO-66-NH2; the nano core-shell compound is Dpa@UiO-66-NH2, and the compound has a diameter of 300-500 nm. The composite fiber membrane is a composite fiber membrane obtained by mixing the nano core-shell compound and a spinning aid and then performing an electrospinning process, the composite fiber membrane is Dpa@UiO-66-NH2/PAN, and the diameter of the fiber is 0.5-3 [mu]m; and the nano core-shell compound and composite fiber membrane show a greatly improved catalytic efficiency for degradation of CWAs simulants under NIR laser irradiation.

The invention belongs to the field of microorganisms and agriculture of the application environment and particularly relates to a pseudomonas aeruginosa strain PAO1 for degrading pesticides containing ester bonds. The collection number of the strain is CCTCC M 2014630. The strain is wide in degradation spectrum, and can be used for degrading the pesticides containing the ester bonds such as high-efficiency cypermethrin, high-efficiency cyhalothrin, deltamethrin, cypermethrin, fenpropathrin, bifenthrin, kresoxim-methyl, pyraclostrobin and azoxystrobin. The strain is strong in environmental adaptability, good in degrading effect and convenient in use, can be used for degrading the pesticides containing the ester bonds, and has very important application value in the aspects of removing pesticide residues in the environments such as water bodies and soil.

The invention provides a strain composition for treating VOCs containing waste gas. The strain composition is prepared from bacillus subtilis, bacillus atrophaeus and virgibacillus pantothenticus. The invention further provides a method for treating the VOCs containing waste gas. The method comprises the following steps that the VOCs containing waste gas is subjected to biological treatment, and strains adopted during biological treatment comprise bacillus subtilis, bacillus atrophaeus and virgibacillus pantothenticus. Bacillus subtilis, bacillus atrophaeus and virgibacillus pantothenticus are used in cooperation for treating the VOCs containing waste gas, the treatment effect can be greatly improved, and the degradation efficiency reaches 95% or above.

The invention discloses a method for degrading N,N-dimethylformamide in sucralose wastewater by using microorganisms. The method comprises: (1) enrichment culture of microbial flora: selecting a microbial flora, inoculating into a culture liquid, and carrying out enrichment culture to obtain an enrichment culture liquid; (2) acclimation of the microbial flora: selecting the enrichment culture liquid, inoculating into an initial acclimation culture liquid containing N,N-dimethylformamide, and carrying out acclimation on the microbial flora by continuously adjusting the N,N-dimethylformamide content in a biological reaction device so as to obtain an acclimation completing culture liquid; and (3) degradation of N,N-dimethylformamide in sucralose wastewater with the microorganisms: continuously introducing sucralose production wastewater containing N,N-dimethylformamide into the acclimation completing culture liquid, and degrading the N,N-dimethylformamide in the sucralose wastewater by using the microorganisms. With the method of the present inventin, the high efficiency and low cost treatment of the N,N-dimethylformamide in the sucralose wastewater can be achieved.

The invention discloses microbial powder for petroleum degradation. The problems of low petroleum degradation efficiency and non-ideal degradation effects of an existing microorganism are solved. The microbial powder comprises a solid agent and a microbial agent, wherein the solid agent consists of the following components in parts by weight: 1 to 2 parts of 2-(3,4-dihydroxyphenyl)ethylamine, 1 to 2 parts of activated carbon, 5 to 6 parts of dodecyl hydroxypropyl sulphobetaine, 5 to 6 parts of octylphenol polyoxyethylene ether, 2 to 3 parts of carbon tetrachloride and 2 to 3 parts of a TH-904 water-soluble dispersant, wherein the microbial agent consists of brevibacillus brevis, bacillus and saccharomycopsis lipolytica of which the viable bacterium ratio is (1-2):(6-7):(5-6); the particle size of the activated carbon is smaller than 0.05[mu]m. The microbial powder has the advantage that the petroleum degradation efficiency is effectively improved.

The invention discloses a method for preparing a cubic structured zinc stannate photocatalyst responding to sunshine. The method comprises the following steps: dissolving 2.1036g of SnCl4*5H2O into 30mL of ethanol so as to obtain a solution A; dissolving 0.8178g of ZnCl2 into 60mL of water so as to obtain a solution B; mixing the solution A with the solution B, adjusting the pH value of the mixedsystem to 11.10 by using a sodium hydroxide solution, further filtering a mixed liquid, washing with water, and drying, thereby obtaining the cubic structured zinc stannate photocatalyst responding tosunshine. The stannate photocatalyst with high activity is prepared by using a method that the pH value of a system is regulated and controlled, and the stannate photocatalyst has the characteristicof being relatively high in degradation efficiency upon organic pollutants under natural sunshine.

The invention relates to the technical field of plastic raw materials, in particular to a degradable plastic. The degradable plastic comprises the following materials in parts by mass: 40-60 parts of corn starch microspheres, 12-18 parts of polyamide, 5-10 parts of polyhydroxybutyrate, 2-12 parts of glass fibers, 0.8-2.4 parts of zinc stearate, 1.2-3.6 parts of plant fibers, 0.8-4.8 parts of dispersants, 6-10 parts of a photosensitizer, 8-16 parts of plasticizers and 0.8-2.8 parts of coupling agents. As the corn starch fibers and the plant fibers which are both degradable materials are added, and benzophenone or benzoin dimethyl ether is selected as the photosensitizer, the degradation efficiency can be effectively improved, and the degradation time is shortened; meanwhile, as the plasticizers, the coupling agents and the glass fibers are added, the tensile strength, the elongation at break, the right-angle tearing load, the physical properties and the practicability of the degradable plastic are improved.