35 results about "In situ degradation" patented technology

The invention relates to an in-situ remediation method of heavy metal-organic combined pollution soil. According to the method, a set of electrokinetic remediation device is added with a power switching system, an electrode heating technology is combined with the electrokinetic remediation and chemical oxidization technology, namely, the direct current power is utilized firstly, sodium persulfate used as the oxidizing agent is migrated to soil through electric process, meanwhile, migration and removal of heavy metal ion in the soil are realized. Then the alternating current power is switched, and soil is heated to a certain temperature through the electrode heating method so as to activate the sodium persulfate migrated to soil, and thereby realizing the in-situ degradation of organic pollutant in the soil. The method applies electrode to the electrode heating system and the electrokinetic remediation device at the same time, simplifies the remediation device and saves the system energy consumption while solves the difficulty that oxidant cannot migrate and activate in the soil and improves the remediation efficiency; the method is a combined soil remediation technology with prospect of application and promotion.

The invention provides bacillus licheniformis CH15 for efficiently degrading crop straws and a bacterial agent thereof, relating to the bacillus licheniformis CH15. The bacillus licheniformis CH15 can be used for efficiently degrading cellulose, lignin and hemicellulose of straws, has the capability of degrading various crop straws, is suitable for quick degradation of southern paddy straws and northern wheat straws and corn straws, has the effects of promoting field in-situ degradation and returning of the crop straws and increasing the functions of soil organic matters and humus, and provides a high-efficiency strain for production and application of the straw degradation bacterial agent.

The invention discloses a microbial inoculum for a high-efficiency fermenting bed and a preparation method thereof. The microbial inoculum is prepared by thoroughly and evenly mixing 30-40% of Bacillus subtilis leavening powder, 30-40% of Bacillus licheniformis leavening powder and 20-30% of Candida utilis leavening powder. The microbial inoculum can effectively promote in-situ degradation of livestock and poultry excrement, obviously reduce the generation of ammonia and other putrilages in the livestock and poultry excrement, and enhance the quality of pork.

The invention discloses a surface self-cleaning carbon nitride Fenton-photocatalytic nanofiltration membrane and a preparation method thereof and belongs to the fields of water treatment membrane materials and preparation processes of the water treatment membrane materials. The method comprises selecting carbon nitride photocatalysts which integrate plasticity of polymer molecules and chemical stability of carbon materials and performing surface modification, chemical modification, Fenton-like agent compounding and the like to prepare a multifunctional water treatment membrane. On the one hand, inter-element triangular nanopores formed by carbon nitride can provide stable natural channels for rapid passage of water molecules; on the other hand, through irradiated catalytic degradation andiron-containing agent Fenton-like oxidation, in-situ degradation of nanofiltration retained pollutants can be achieved. The surface self-cleaning carbon nitride Fenton-photocatalytic nanofiltration membrane provides a new way for solving the problem of membrane contamination difficult for traditional nanofiltration membrane materials and has the advantages of being simple in preparation method, low in cost, resistant to pollution, low in water mass transfer resistance and the like, thereby being applicable to application to the field of water purification.

The invention relates to a three-dimensional graphene / black titanium dioxide composite material and a preparation method and application thereof. The three-dimensional graphene / black titanium dioxidecomposite material is prepared from three-dimensional graphene and nano black titanium dioxide loaded on the three-dimensional graphene. According to the three-dimensional graphene / black titanium dioxide composite material and the preparation method and application thereof, the three-dimensional graphene is compounded with the nano-sized black titanium dioxide, the three-dimensional graphene is used as a key photo-generated carrier separation and conduction network to realize the outstanding effect of integration of high-efficiency adsorption of pollutants and in-situ degradation of black titanium dioxide in response to visible light, and the photocatalytic efficiency driven by full sunlight broad spectrum is significantly improved.

The invention discloses a cellulose degradation composite microbial inoculum with low-temperature resistance as well as a preparation method and an application of the cellulose composite microbial inoculum. The cellulose degradation composite microbial inoculum with low-temperature resistance comprises effective components of flavobacterium johnsoniae and stenotrophomonas maltophilia in a weight ratio of (0.5-1.51): 1, and the total effective viable count in the cellulose degradation composite microbial inoculum with low-temperature resistance is 3*10<9> CFU / g or more. The cellulose degradation composite microbial inoculum with low-temperature resistance can be further applied to in-situ degradation and returning to the field of t straws due to efficient degradation of cellulose such as crop straws at low temperature. The composite microbial inoculum can solve the problems of low cellulose degradation rate and long period in the low temperature environment in northern China.

A remediation process that a employs improved quantitative method(s) of estimating of the volume and / or mass of contaminant in the subsurface, removal and or in situ degradation of the contamination using subsurface pulsing treatment (“SPT”) technology, and evaluation of the degree of remediation by re-applying the quantitative contaminant evaluation methods. The process uses SPT technology with the addition of a vacuum or sub-atmospheric pressure to an extraction well in order to create a push-pull effect to remove free contaminant or residual in conjunction with the pressure wave driving force created in the excitation or excitation well. The process can quantitatively measure the amount of residual contaminant, which up until now has not been possible or tractable using in situ methods, as well as measure the amount of residual that can be removed by SPT.

The present disclosure describes anti-wear compounds that improve the pack stability of a lubricant composition and are resistant to in situ degradation while maintaining effective anti-wear performance.

The invention discloses bio-control streptomyce for straw degradation and an application thereof in the technical field of soil restoration. A method for preparing the streptomyce comprises strain preservation and strain activation, wherein the strain preservation uses a low-temperature freezing preservation method at minus 20 DEG C to reduce the metabolism velocity of microbial spores at a low temperature to achieve the purpose of strain preservation; the strain activation uses a method of inoculating strains in a freezing preservation state into a YEME (yeast extract-malt extract) liquid culture medium, and breeding the strains when the strains are gradually adaptive to the culture environment, so as to obtain cultures with enough quantity and vigour. In addition, the invention relates to an application for the streptomyce JSD-1 in bio-control. According to the streptomyce and the application disclosed by the invention, in-situ degradation for carbon which is difficult to use in straws and excessive nitrogen in facility secondary salinized soil is realized by virtue of the undisclosed nitrate nitrogen degradation transformation capacity as well as the characteristics such as the very strong tolerance to nitrate with a high temperature (for example, 70 DEG C) and a high concentration (for example, 3%), the great inhibition effect on the microbes of plant pathogens (for example, botrytis cinerea and rice bakanae disease), and the like of the known JSD-1 strains, and the bio-control streptomyce has a great application potentiality in developments for high temperature compost external bacteria agents and bio-fertilizers.

Provided are a microbial agent capable of making a side slope and bulkhead vegetation community free of artificial maintenance and a construction method thereof. The microbial agent is prepared through the steps of preparation of fermentation raw materials, smashing of the fermentation raw materials, liquefaction, sterilization, fermentation, desiccation and packaging, and desiccation and packaging are conducted on the raw materials which are subjected to fermentation. The microbial agent comprises various fungi such as paenibacillus sp., bacillus amyloliquefaciens, arthrobacter humicola, pseudomonas graminis, phanerochaete chrysosporium, trichoderma longibrachiatum, aspergillus niger, rhodotorula mucilaginosa, sporobolomyces and clitocybe geotropa. According to the microbial agent free of artificial maintenance for the side slope and bulkhead vegetation community, by means of a nutrient substance circulation theory of dry branches and fallen leaves, the microbial agent is added to a target vegetation community in one time, in situ degradation is conducted on the dry branches and fallen leaves to activate microorganisms, in an ecological system, a new system which has the functions of matter circulation, energy flow, soil fertility increase and vegetation community update and succession is formed among the dry branches and fallen leaves, soil and vegetation, therefore, artificial cultivation of the side slope and bulkhead vegetation community is not needed, and plants grow vigorously.

In situ hydrous pyrolysis / oxidation process is useful for in situ degradation of hydrocarbon water and soil contaminants. Fuel hydrocarbons, chlorinated hydrocarbons, polycyclic aromatic hydrocarbons, petroleum distillates and other organic contaminants present in the soil and water are degraded by the process involving hydrous pyrolysis / oxidation into non-toxic products of the degradation. The process uses heat which is distributed through soils and water, optionally combined with oxygen and / or hydrocarbon degradation catalysts, and is particularly useful for remediation of solvent, fuel or other industrially contaminated sites.

The invention discloses an activated carbon fiber regeneration device utilizing ozone oxidation-electrothermal desorption. The activated carbon fiber regeneration device comprises an adsorption pipeline and a desorption pipeline, wherein the adsorption pipeline is formed by connecting a to-be-treated gas flow controller, a three-way plunger valve I, an adsorption bed and a three-way plunger valveII in sequence; the desorption pipeline is formed by connecting a high-pressure oxygen cylinder, an oxygen flow controller, an ozone generator, the three-way plunger valve II, the adsorption bed, thethree-way plunger valve I, a compressor, a VOCs (Volatile Organic Chemicals) recycling tank and an ozone removing and capturing device in sequence; the adsorption bed is filled with an adsorbent; theadsorption bed is provided with a voltage regulation device; the voltage regulation device is formed by connecting heating power supplies with the upper and lower ends of the adsorption bed and connecting the heating power supplies with a temperature controller; a thermocouple is mounted at the middle section in the adsorption bed and the thermocouple is connected with the temperature controller;desorption and regeneration of an activated carbon fiber porous adsorption material can be realized; in-situ degradation treatment of VOCs is realized under a relatively low desorption temperature condition, the desorption and regeneration efficiency of the activated carbon fiber porous adsorption material is enhanced and the energy consumption of a desorption technology is reduced.

The invention relates to a system and a method for in-situ degradation of dioxin substances in smoke. The system comprises: (I) a purifying pipeline arranged between any position of a smoke discharging pipeline and a purified gas outlet; (II) a degrading device arranged on the purifying pipeline and provided with a catalyst inlet and a catalyst outlet; and (III) a catalyst circulation device provided with a catalyst injection pipeline and a catalyst recovery pipeline, wherein the catalyst injection pipeline is connected with the catalyst inlet of the degrading device, and the catalyst recovery pipeline is connected with the catalyst outlet of the degrading device. The smoke is introduced to the degrading device, the catalyst is injected, and is in contact with the smoke at 200-600 DEG C in order to carry out a catalytic degradation reaction, obtained purified gas is discharged, and the catalyst is recycled. The system and the method realize the high-efficiency low temperature in-situ degradation of the dioxin substances, allow the degradation rate to reach 85% or above, and provide an effective method and way for the synergistic degradation of dioxins and precursors thereof in industrial waste gas.

The invention belongs to the technical field of biology, and relates to a repair method of contaminated soil, in particular to a method of accelerating in-situ degradation of PCP (pentachlorophenol) in a paddy field. The method of accelerating the in-situ degradation of PCP (pentachlorophenol) in the paddy field is characterized in that electron donor sodium citrate is used in an anaerobic environment to promote iron-reducing bacteria in soil of the paddy field to reduce iron oxides to Fe(II), and produced Fe(II) can promote PCP dechlorinating transformation till PCP is mineralized finally. With the adoption of the method, PCP in the paddy field can be degraded effectively, the problems of poisoning and various human diseases that are caused by the fact that PCP enters a food chain can be solved fundamentally. The method has the advantages that the damage to the environment is very little, no secondary pollution is produced, the cost is low, large-scale operation is facilitated, and no production or economic income is affected.

The invention discloses an ecological pit-type treatment method for a black and odorous water body. Firstly, exogenous solid-liquid contaminants are prevented from entering the polluted black and odorous water body, the solid contaminants in the water body are primarily removed through manual operation or mechanical fishing, a mud-water separating material is added into the black and odorous waterbody of a lake to improve the transparency of the water body, and illumination energy is provided for growth and propagation of microorganisms; then, porous biological carriers are put into a bottomsludge layer of the water body through the modes of pit digging, net pipe arranging or bottom mud structures, and biological oxidation materials are added and injected in the targeting direction of the bottom sludge layer to activate the microorganism metabolism environment of the bottom mud. The ecological pit-type treatment method is mainly applied to treatment on the black and odorous water body, can rapidly improve the water body and the black and odorous phenomenon of the bottom mud, optimizes the microorganism metabolism environment of the bottom mud, realizes in-situ degradation withoutsludge removal, effectively stops the bottom mud from floating, and promotes biological degradation of COD / NH3-N / TP.

The invention discloses an organic waste low-temperature in-situ degradation reaction device which is composed of a magnetic pulse reactor, a rotating device, a temperature measuring device, a humidity measuring device and a water replenishing device. Heat is produced through electromagnetic conversion to be supplied to organic matter for thermal decomposition at the temperature of 150-180 DEG C,and kitchen waste, straw, landscaping waste, rice bran, grass, wheat bran and other organic waste can be converted into carbon dioxide, water, inorganic mineral substance and the like within 16-24 h.The device has the advantages that the energy consumption is low, the cost is low, the occupied area is small, operation is easy, and safety and reliability are achieved. Under regular stirring of a stirring device, materials can be sufficiently turned over to make sufficient contact with oxygen, incomplete reaction is avoided, and carbon monoxide is effectively reduced. Energy consumption is greatly reduced through combination of precise thermocouple temperature control and the magnetic pulse technology. Under reaction conditions, dioxin is effectively restrained, the reaction speed is improved through material disturbance, and organic matter degradation efficiency reaches up to 80% or above.

The invention relates to the technical field of formaldehyde cleaning agent, in particular to a preparation method for adsorptive catalyst for the in situ degradation of formaldehyde. The preparationmethod for adsorptive catalyst for the in situ degradation of formaldehyde comprises the following steps: (1) adding foaming agent into nylon66 emulsion to be evenly mixed, then, carrying out electrostatic spinning to obtain nylon66 fibers, and calcining the nylon66 fibers to obtain porous carbon fibers; (2) carrying out thermal reaction on the porous carbon fibers, attapulgite, silane coupling agent and organic titanate in solvent to obtain modified porous carbon fiber; (3) after the modified porous carbon fiber is subjected to ultrasonic dispersion in the solvent, adding poly dimethyl diallyl ammonium chloride, then, adding graphene oxide, and stirring for 30-45 min to obtain the adsorptive catalyst for the in situ degradation of formaldehyde. According to the adsorptive catalyst for thein situ degradation of the formaldehyde, indoor formaldehyde can be subjected to adsorption and catalytic degradation, and indoor formaldehyde can be permanently and thoroughly purified.

The invention discloses a microbial inoculum for a high-efficiency fermenting bed and a preparation method thereof. The microbial inoculum is prepared by thoroughly and evenly mixing 30-40% of Bacillus subtilis leavening powder, 30-40% of Bacillus licheniformis leavening powder and 20-30% of Candida utilis leavening powder. The microbial inoculum can effectively promote in-situ degradation of livestock and poultry excrement, obviously reduce the generation of ammonia and other putrilages in the livestock and poultry excrement, and enhance the quality of pork.

The invention belongs to the technical field of catalysis materials and discloses a reducing titanium dioxide (TiO2) photocatalyst as well as a preparation method and an application thereof. The TiO2photocatalyst is prepared by the steps of mixing TiO2 with a reducing agent, putting the mixture into a tube furnace filled with protective gas, reacting at 100-1000 DEG C so as to obtain a powder sample, flushing the powder sample through acid, and drying. The TiO2 photocatalyst is a visual photocatalyst with high activity and controllable photoresponse, the adsorption enrichment and in-situ degradation of volatile organic compounds on the catalyst can be realized, the utilization rate of optical photons is increased, the degradation efficiency of the volatile organic compounds is relativelyhigh, meanwhile, the operation is simple, and the application basis is provided for the pollution control of the volatile organic compounds.

The invention provides a disulfide bond containing compound and use and preparation methods thereof. The compound has a structural general formula represented by a formula shown in the description, wherein A is a substituted or unsubstituted hydrophilic monosaccharide group, oligosaccharide group or ammonium inner salt group, and B is a hydrophobic aliphatic group with 40 or less carbon atoms. According to the disulfide bond containing compound and the use and preparation methods thereof, through introducing disulfide bonds to corresponding positions of micromolecules, the micromolecules reserve dissolved membrane and protein stabilizing actions, which are equivalent to or even better than those of a prototype descaling agent, complete in-situ degradation can be achieved under the action of a breaking agent, to obtain two mercaptan fragments, and properties of a surfactant are lost. The compound can be used for preparing and researching membrane proteins.

The invention relates to the technical field of formaldehyde removing agents, in particular to an adsorption catalyst for in-situ degradation of formaldehyde. The adsorption catalyst is prepared fromthe following parts by weight: 5-15 parts of attapulgite, 3 to 12 parts of organic titanate, 3 to 4 parts of a silane coupling agent, 5 to 8 parts of graphene oxide, 3 to 8 parts of polydiallyl dimethyl ammonium chloride, 1 to 5 parts of a foaming agent, 80 to 150 parts of a nylon 66 emulsion, and 10 to 50 parts of a solvent. The adsorption catalyst in the invention can adsorb and catalytically degrade indoor formaldehyde, and can remove indoor formaldehyde in a long-lasting and thorough manner.

The invention relates to the technical field of vehicle-use purifying agents, and particularly relates to a preparation method of a vehicle-use purifying agent for in-situ degradation of volatile organic compounds (VOCs). The preparation method of the vehicle-use purifying agent for in-situ degradation of VOCs comprises the following steps: (1) adding a foaming agent into polypropylene resin, uniformly carrying out mixing, then carrying out electrostatic spinning to obtain polypropylene fibers, and carrying out calcination to obtain porous carbon fibers; (2) carrying out thermal reaction on the porous carbon fibers, kaolin, a soluble metal salt, a silane coupling agent and an organic titanate in a solvent to obtain modified porous carbon fibers; and (3) dispersing the modified porous carbon fiber in a solvent, adding poly(diallyldimethylammonium chloride), then adding graphene oxide, and uniformly carrying out stirring to obtain the vehicle-use purifying agent for in-situ degradation of VOCs. The vehicle-use purifying agent for in-situ degradation of VOCs can adsorb VOCs in a vehicle, can be used for carrying out in-situ catalytic degradation at adsorption sites, and has the characteristics of high catalytic degradation efficiency and thorough degradation.

The invention discloses a microbial inoculum for preparing a caged chicken fermentation mattress material and a preparation method of the inoculum. The composite microbial inoculum is prepared by inoculating a composition consisting of a bacillus amyloliquefaciens fermentation liquid, a bacillus megaterium fermentation liquid, a trichoderma longibrachiatum fermentation liquid and a lactobacillus plantarum fermentation liquid into a solid culture medium, uniformly mixing, culturing for 72-96 hours under a culture condition of 30-35 DEG C, and drying. The invention discloses an application of the composite microbial inoculum in preparing the caged chicken fermentation mattress material. The composite microbial inoculum is prepared by selecting the best proportion of four excellent strains, the functional strains cooperate in the feeding and management process of the caged chicken fermentation bed surface, the functions of the organic matter transforming bacteria, the ammonia fixing deodorizing bacteria and the bacteria inhibiting bacteria are complementary, the temperature rise fermentation of the fermentation bed is rapidly started, the rapid removal of moisture in feces is realized, the microbial diversity of the fermentation bed is improved, the growth of pathogenic spoilage bacteria is inhibited, the in-situ degradation of chicken manure is promoted, and the humification rateof the mattress material is improved.

The invention discloses a method for biological ex-situ degradation of formaldehyde. A microbial electrochemical / advanced oxidative coupled formaldehyde degradation system is adopted, and the system is composed of a microbial electrochemical system for synthesizing H2O2 and a UV / H2O2 advanced oxidation system. The method comprises the following steps: 1, constructing the microbial electrochemicalsystem for synthesizing H2O2: (1) forming an anode chamber and a cathode chamber which constitute the microbial electrochemical system, and separating the anode chamber and the cathode chamber by a cation exchange membrane; (2) domesticating the anode of the microbial electrochemical system; and (3) using a carbon brush and a graphite-carbon black mixed rolled air cathode to syntehsize H2O2; and 2, constructing the UV / H2O2 advanced oxidation system for degrading formaldehyde. Microorganisms do not need to be in direct contact with formaldehyde pollutants to be treated, so the problem of bioactivity inhibition caused by the toxicity of formaldehyde to the microorganisms in biological in-situ degradation of formaldehyde is avoided.

An organic waste low-temperature in-situ degradation reaction device is composed of a magnetic pulse reactor, a rotation device, a temperature measuring device, a humidity measuring device and a watersupplementing device. Heat is generated through electromagnetic conversion for heat decomposition of organic matter at the temperature ranging from 150 DEG C to 180 DEG C, and kitchen waste, straw, garden greening garbage, rice bran, grass or wheat bran and other organic waste can be converted into carbon dioxide, water, inorganic mineral substances and the like within 16-24 h. The organic wastelow-temperature in-situ degradation reaction device has the advantages that the reaction device has the characteristics of being low in energy consumption and cost, small in occupied area, easy to operate, safe and reliable; under periodic stirring of a stirring device, sufficient stirring of materials can be achieved, sufficient contact with oxygen is achieved, incomplete reaction is avoided, andgeneration of carbon monoxide is effectively reduced; according to the device, through accurate thermocouple temperature control and in combination with the magnetic pulse technology, energy consumption is greatly reduced; and through reaction conditions, generation of dioxin is effectively restrained, meanwhile, the reaction speed is increased through material disturbance, and the organic matterdegrading efficiency can reach 80% or above.

The invention discloses an in situ repair agent of contaminated sediments for sediments contaminated by polycyclic aromatic hydrocarbon compounds and a repair method thereof. The in situ repair agent comprises Ca (NO3)2.4H2O, C6H5O7Fe.5H2O, polyacrylamide and water with a mass ratio of (100-1000) to (200-2000) to (1-10) to (100-2000). The in situ repair agent for sediments contaminated by polycyclic aromatic hydrocarbon compounds capable of being slowly released is intermittently thrown into PAHs contaminated sediments to improve the abundance and degrading activity of indigenous microorganisms in the sediments, promote the in situ degradation of PAHs and treat the contaminated sediments. The technology is simple to operate, low in necessary treatment cost, excellent in effect and free of secondary pollution, and no additional treatment site is constructed, so that the technology has a wide application prospect in the treatment of PAHs contaminated sediments.

The invention belongs to the technical field of adsorption catalytic materials, and discloses a mesoporous silica gel-supported titanium pillared clay photocatalyst, a preparation method and application thereof. In the present invention, the titanium sol is added dropwise into the sodium-based clay, stirred, and the acid-pretreated activated silica gel is added after fully supporting the reaction, and the stirring is continued. After the silica gel in the mixed system is fully precipitated, the supernatant is filtered off, and the precipitate The titanium pillared clay photocatalyst supported by mesoporous silica gel is obtained after drying and calcining. The photocatalyst of the present invention not only has strong adsorption performance for organic pollutants, but also has strong photocatalytic activity, thereby realizing the integration of adsorption of organic pollutants and photocatalytic oxidation, so that the hydroxyl radicals generated on the surface of the catalyst It can effectively mineralize and degrade the organic pollutants adsorbed and enriched by the adsorption material in situ, greatly enhance the reaction rate and efficiency of photocatalytic degradation of organic pollutants, and can be used as an adsorbent or photocatalyst in the field of environmental protection.

The invention relates to the technical field of vehicle purifiers, specifically relates to a vehicle purifier for in-situ degradation of VOCs. The vehicle purifier for in-situ degradation of the VOCsis prepared from the following substances in parts by weight: 5-15 parts of kaolin, 3-12 parts of organic titanate, 0.1-1 part of a soluble metallic salt, 1-3 parts of a silane coupling agent, 5-8 parts of graphene oxide, 3-8 parts of polydiallyl dimethyl ammonium chloride, 1-5 parts of a foaming agent, 80-150 parts of a polypropylene resin, 2-10 parts of an inorganic acid and 10-50 parts of a solvent. The vehicle purifier for in-situ degradation of VOCs, which is provided by the invention, is capable of adsorbing formaldehyde in a vehicle, is capable of carrying out in-situ catalytic degradation at an adsorption point, and has the characteristics of being high in catalytic degradation efficiency and thorough in degradation.