288results about How to "Efficient degradation ability" patented technology

The invention discloses a composite microbiological bacterial agent used for returning maize straws to a field and a preparation method and applications thereof. The composite microbiological bacterial agent comprises Arthrobactersp, Bacillus subtilis, Phanerochaetechrysosporium, Trichoderma koningii, Aspergillusniger, Saccharomyces cerevisiae, Streptomyces alboniger, and Streptomyces hygroscopicus. The preparation method comprises the following steps: carrying out slant culture, fermenting one-grade seeds and second-grade seeds and mixing, culturing, and fermenting the one-grade seeds and the second-grade seeds, realizing the optimization of compound bacterial biomass and the matching of different strains, and the compound bacterium effective viable count can reach 1010cfu per gram. By utilizing the compound microbiological bacterial agent, the decomposition velocity of organic matters can be accelerated, the straw can be decomposed and blackened within 10 days at the low temperature of 10-15 DEG C; the straw is basically well-rotted; and the composite microbiological bacterial agent has certain disease-resisting effect, and provides necessary condition for preventing the diseases of wheat roots.

The invention discloses a preparation method of a hydrogel with adsorption and catalysis functions. The preparation method comprises the following steps of: preparing the hydrogel, and loading at least one noble metal to a hydrogel carrier; drying the obtained loaded type hydrogel. The preparation process of a loaded type hydrogel material is simple, moderate in condition and suitable for industrial production; an obtained product can be used for effectively degrading the organic dyes which are contained in a water body and include anionic and cationic dyes and still has better catalytic property after being recycled for multiple times.

The invention discloses an ozone-catalytic functional ceramic membrane, a preparation method thereof and a circulating coating device, relates to the technical field of membrane material preparation, and aims at solving the problems that the ozone-catalytic efficiency of the existing ceramic membrane is low, the integration of membrane filtration and ozone-catalytic functions cannot be realized, membrane pollution cannot be effectively relieved and the like. By using a tubular ceramic membrane as a carrier, single-component or multi-component metal oxides are loaded through an impregnation method, then manganese oxide dipping coating solution is prepared, and a catalytic coating layer is prepared on the surface of the membrane through a layer-by-layer dipping coating method. The invention aims at establishing a stereoscopic multistage catalyst system, simultaneously improving the catalytic efficiency of the separation layer and supporting layer of the ceramic membrane and enabling an ozone-catalytic effect to seep into the entire ceramic membrane to fully realize the overall catalytic effect. Compared with other metal oxides, manganese oxide has better adsorption and ozone-catalytic capacities, and while the ozone-catalytic capacity is improved, the membrane pollution is effectively relieved and the integration of multiple functions such as pollutant adsorption, ozone-catalytic oxidization and membrane separation is realized.

The invention provides a microbial soil conditioner. The microbial soil conditioner comprises the following raw materials: an organism carrier, bacillus amyloliquefaciens with the concentration higher than or equal to 2 billion cfu / g, bacillus mucilaginosus with the concentration being 0.15-0.3 billion cfu / g, trichoderma harzianum with the concentration being 30-100 million cfu / g, paecilomyces lilacinus with the concentration being 10-50 million cfu / g and streptomyces griseus with the concentration being 10-50 million cfu / g. The invention further provides a preparation method of the microbial soil conditioner. The preparation method comprises an organism carrier preparation step and a finished product preparation step. The microbial soil conditioner can activate beneficial microbial flora of local soil, form a PGPR (plant growth promoting rhinoacteria) action with the beneficial microbial flora, enhance the activity of a plant root system, promote growth and effectively control pest and disease damage; the preparation method is simple and convenient to use.

The invention discloses a novel photocatalytic air purifier for air conditioning. The novel photocatalytic air purifier for the air conditioning comprises a case body and a case cover; the two ends of the case cover are provided with an air inlet and an air outlet; a position of the lower portion inside the case body, which is close to the air inlet, is provided with a first filtering screen; a second filtering screen is also arranged inside the case body in an insertion mode; ultraviolet sterilization lamp tubes are arranged inside the case body; reflectors are arranged inside the case body; and an exhaust fan is arranged on the rear side of the second filtering screen. Compared with the prior art, the novel photocatalytic air purifier for the air conditioning has the advantages of being capable of directly killing batteries and virus, efficiently degrading or decomposing various organic matters and removing various abnormal smells in the air due to the photocatalysis principle, being free of generation of secondary pollution and achieving purification of the indoor air.

The invention discloses a Bacillus amyloliquefaciens CB-019 for producing surfactin. The above strain is preserved in China General Microbiological Culture Collection Center with the preservation number of CGMCC No.11950. A method for fermenting the strain and preparing a biochemical oil displacement agent is simple and is easy to implement, and the prepared biochemical oil displacement agent has good environment adaptability, and can keep high surface interface vitality and crude oil emulsification viscosity reduction ability; and the strain also can degrade petroleum, guar gum and other high-molecular polymers, and can be applied to treatment of oil-containing sewage, backflow fracturing fluids and polymer-bearing wastewater. The Bacillus amyloliquefaciens CB-019 has important promotion and application values in the fields of microbial oil extraction and environment restoration.

The invention relates to an environment-friendly straw fermenting agent. The environment-friendly straw fermenting agent is prepared from the following seven raw materials in percentage by weight: 25 percent of bacillus subtilis, 15 percent of trichoderma viride, 18 percent of saccharomyces cerevisiae, 12 percent of aspergillus niger, 10 percent of streptomyces hygroscopicus, 10 percent of trichoderma koningii and 10 percent of arthrobacter. The environment-friendly straw fermenting agent can accelerate the decomposition speed of cellulose and can completely decompose crop straws within aboutten days to return to the field, so that the straws are corroded, blackened and composted. The environment-friendly straw fermenting agent can accelerate release of nutrient elements in the straws, provides more nutrients for growth of the crops at the later stage, maintains and improves soil fertility, improves soil organic matter, improves physicochemical property of the soil, increases the yield of the crops by about 10 percent, and can be widely applied to returning straws of the crops such as rice, wheat, corn and the like to the field.

The invention relates to microorganism immobilization technology, in particular to a method for preparing immobilized granules for remediation of polycyclic aromatic hydrocarbons (PAHs) polluted soil. Mix the glue evenly, and pass through a granulator with a diameter of 1-4.00mm under natural conditions of 25-40°C and pH to prepare immobilized granules at a dripping speed of 20-30 drops / min. Chemically cross-link, then stand in the fixative for 23-58 hours, and finally soak in sterile water for 24-72 hours, rinse off the residual liquid, multiply and cultivate, and set aside; the mass ratio of the gel solution is: alginic acid Sodium (Na·Alg) 2-3%, (150 mesh) activated carbon, red brick powder, peat soil and / or fly ash 0.3-0.6%, and the balance is water. The invention can greatly improve the mechanical strength, elasticity and slow-release performance of the immobilized particles.

The invention discloses bacillus amyloliquefaciens capable of degrading ZEN (zearalenone) efficiently and an application of the bacillus amyloliquefaciens. The collecting number of the bacillus amyloliquefaciens ASAGF142 is CGMCC (China General Microbiological Culture Collection Center) No. 9464. The invention further provides an inoculant comprising the collected strain and a preparation method of the inoculant. Besides, the invention provides the application of the strain or the inoculant in degradation of ZEN. The strain can degrade 20 mu g / ml of ZEN completely in short time, and the degradation rate is 100%.

The invention relates to the technical field of water treatment and particularly relates to an advanced reduction method and device for rapidly removing perfluoro-compounds from water. The method comprises the following steps: adding sodium sulfite into wastewater to be treated; putting the sodium sulfite added wastewater into a magnetic stirrer, starting to carry out stirring, and stably maintaining the stirring for 15 minutes in a dark place; putting the stirred wastewater into an inert quartz reaction vessel, opening a slide damper, carrying out high-strength ultraviolet-light source irradiation on the wastewater to be treated, starting to carry out timing, closing the slide damper until selected reaction time reaches, stopping irradiation, and carrying out sampling; determining the PFOA (Perfluorooctanoic Acid) / PFOS (Perfluorooctane sulfonates) concentration of a sample by using a liquid chromatogram-triple quadrupole mass spectrometer, determining fluorine ion concentration by using a fluoride-ion electrode, and calculating a defluorination ratio. According to the method and the device, efficient degradation and defluorination for PFOA / PFOS can be achieved under mild conditions, a photocatalyst is not required to be added during reaction, the cost is reduced, the reaction is rapid, final products are F<->, SO4<2-> and partial fluorinated olefins or alkanes, no secondary pollution is caused, and the aims of high efficiency and low consumption are truly achieved.

The invention discloses a preparation method of a magnetic graphene titanium dioxide nano composite wastewater treatment agent. The preparation method comprises the following steps: A, performing sulfonation modification on graphene by using organic small molecules so as to obtain sulfonated graphene nanosheets with high dispersibility in water; B, by taking sulfonated graphene and iron ions as raw materials, synthesizing a graphene / ferroferric oxide nano composite material with magnetism by using a coprecipitation method; C, by taking the magnetic graphene and titanium dioxide powder as raw materials, implementing a hydrothermal method, thereby obtaining a titanium dioxide / ferroferric oxide / graphene nano composite material as a composite wastewater treatment agent. The composite wastewater treatment agent prepared by using the method is capable of effectively degrading organic pollutants such as methylene blue in water, can be recycled and reused through an external magnetic field, is excellent in photocatalysis degradation performance and good in recyclability and regenerability, is very applicable to treatment on organic pollutants in water, and has important significances and application values for environment protection and sustainable development.

The invention discloses a corn straw fermentation microorganism agent which consists of phanerochaete chrysosporium, trichoderma koningii, bacillus subtilis, bacillus licheniformis and monilia tropicalis. The corn straw fermentation microorganism agent disclosed by the invention has the beneficial effects that the microorganism agent is reasonable in formula and convenient to use; the straw rotting speed is high; the corn straw fermentation microorganism agent has the characteristics of new combination, stable structure, high enzyme activity, high microbial content and the like. The corn straw fermentation microorganism agent can be used for performing high-efficiency and environment-friendly fermentation on corn straw materials, so that a feed can contain a large amount of microorganism live cells, clastic enzymes and other active components, and the utilization rate of the corn straw materials can be effectively increased. The practical significance of solving the problem of environment pollution is achieved; furthermore, the actual application values such as the protein content and the nutritional value in the corn straw materials can be improved; good preconditions are created for recycling application of corn straws.

The invention relates to a phenolic acid type allelochemical degrading bacterium and the preparation and the application of a microbial inoculum thereof. The BJS-1-3 bacterial strain disclosed by the invention is from rhizosphere soil of perennial poplars in Tai'an City, Shandong Province, China, and the soil is artificially gathered, screened and purified to obtain the bacterial strain. The bacterial strain has a high degrading capacity to benzoic acid, and phenolic acid type allelochemicals, such as ferulic acid, p-hydroxybenzoic acid, vanillin, cinnamic acid and phloridzin, can be respectively used as a unique carbon source in which the bacterial strain grows and propagates, and the bacterial strain can stably propagate in the rhizosphere of poplars, apple trees and cucumber plants. Through the adoption of the microbial inoculum prepared from the bacterial strain, the succession cropping obstacles of plants, such as the poplars, the apple trees and the cucumber plants, due to the accumulation of phenolic acid type allelochemicals can be effectively prevented and treated. The preparation technology of the microbial inoculum is simple, the fermentation period is short, the cost is low, and the industrialized production is facilitated.

The invention relates to a method and equipment for cross backflow two-stage double-expansion granular sludge treatment of coking wastewater. The method comprises the following steps: introducing the coking wastewater to a first-stage double-expansion granular sludge reactor and degrading the coking wastewater to produce first-stage treated water; delivering a part of the first-stage treated water to a first-stage aeration backflow column and the other part of the first-stage treated water to a second-stage reactor directly; aerating the treated water which enters the first-stage aeration backflow column, allowing a part of the aerated water and return water of second-stage treatment mixed directly and flow to the first-stage reactor, and making the part of the aerated water and the aerated water of the second-stage treatment mixed and flow into the second-stage reactor; degrading the treated water which enters the second-stage reactor to produce water of the second-stage treatment, directly discharging a part of the water of the second-stage treatment, and making the other part of water of the second-stage treatment flow into a second-stage aeration backflow column; and aerating other part of the water of the second-stage treated treatment, and returning part of the aerated water of the second-stage treatment to the second-stage reactor, and returning the other part of the aerated water of the second-stage treatment to the first-stage reactor as direct return water of the second-stage treatment. The treatment method and equipment can realize the simultaneous efficient removal of COD and ammonia nitrogen from the coking wastewater.

The invention discloses a biological purification agent applied to sewage of livestock and poultry farms and a preparation method thereof. The preparation method comprises the following steps: firstlyadding a compound microorganism bacterium agent into an immobilized carrier formed by three carriers including sodium alginate zeolite, sodium alginate and polyvinyl alcohol to obtain a bacterium solution, wherein the mass ratio of the immobilized carrier to the compound microorganism bacterium agent is (200-300) to 1, the compound microorganism bacterium agent contains rhodospirillum, nitrifyingbacteria and bacillus subtilis according to a volume ratio of 1 to 1 to 1, and the number of effective living bacteria in per gram of the compound microorganism bacterium agent is greater than or equal to 109; then dropping the bacterium solution into a boric acid saturated solution with 4-8% of CaCl2 to obtain globular immobilized compound microorganisms; finally enabling the immobilized compound microorganisms to stand and cure under the condition of 4 DEG C, carrying out immobilized crosslinking for 24 hours to obtain immobilized microorganism globules, washing the immobilized microorganism globules with deionized water for at least three times to obtain the biological purification agent. The preparation method is simple and is low in cost; the prepared purification agent has strong stability, and high microorganism activity, is environmentally friendly, and is free of secondary pollution.

A composite inoculant for degrading petroleum is characterized by comprising acinetobacter venetianus LCL-1 and dietzia sp. CN-3, wherein the ratio of live acinetobacter venetianus LCL-1 to live dietzia sp. CN-3 is 1-50:10-200. The strain of acinetobacter venetianus LCL-1 is preserved in China Center for Type Culture Collection (CCTCC), the preservation number is M 2015538; and the strain of dietzia sp. CN-3 is preserved in China Center for Type Culture Collection (CCTCC), and the preservation number is M 2015537. The acinetobacter and dietzia are separated from soil polluted by petroleum, both have an efficient petroleum degrading performance, and can well cooperate with each other. Through the relationships such as commensalism, mutualism, and the like, the shortage of low degradation rate of single bacteria is overcome, and the petroleum degrading performance is largely improved. Moreover, the invention also provides a preparation method of the composite inoculant and an application of the composite inoculant in petroleum degradation.

The invention relates to an iron-carbon inner electrolysis-Fenton oxidation-electrolytic electrocatalytic oxidation combined wastewater treatment method and device. According to the invention, iron-carbon inner electrolysis-Fenton oxidation-electrolytic electrocatalytic oxidation is adopted. Wastewater is subjected to iron-carbon inner electrolysis in an iron-carbon inner electrolysis filling material tower, and is subjected to Fenton-method treatment, such that residual Fe<2+> in the solution obtained after iron-carbon inner electrolysis is subjected to a sufficient oxidation reaction; an electrolytic electrocatalytic oxidation reaction is carried out, such that heterocyclic organics in the wastewater are thoroughly decomposed. The method causes no secondary pollution. With the method, various organics in high-salt wastewater can be highly efficiently degraded, a COD removal rate can be higher than 75%, and biodegradable BOD5 / CODcr is increased from 0.03 to higher than 0.3, such that biodegradability is substantially improved. Outlet water has the advantages of low salt content, low chromaticity and low ammonia nitrogen content.

The invention particularly relates to a microbial composite functional bacterial agent for treating coking wastewater and a preparation method thereof. According to the technical scheme, the microbial composite functional bacterial agent comprises the following microbes: 15-20wt% of n-hexadecane degrading bacteria, 20-30wt% of phenol degrading bacteria, 10-15wt% of pyridine degrading bacteria, 8-12wt% of chinoline degrading bacteria, 5-10wt% of carbazole degrading bacteria, 15-20wt% of naphthalene degrading bacteria and 8-12wt% of anthracene degrading bacteria. The microbial composite functional bacterial agent has the characteristics that: the composite functional bacterial agent prepared from artificially bred functional strains is added to an original biochemical treatment device, thus the removing capability of refractory organic matters in the coking wastewater is greatly improved and the contents of COD (chemical oxygen demand) and NH3-N in the coking biochemical effluent can both reach national first-level emission standard. The microbial composite functional bacterial agent has strong environment adaptability, good cooperativity, and broad application prospects in bioaugmentation of coking wastewater.

The invention discloses a titanium dioxide / sulfonated oxidized graphene / silver nanoparticle composite film and a preparation method and application thereof. The method comprises the steps of evenly mixing oxidized graphene, chloroethanesulfonic acid sodium salt and sodium hydroxide with water and then adding concentrated nitric acid to conduct a reaction to obtain sulfonated oxidized graphene; mixing an aqueous solution of the sulfonated oxidized graphene and a silver nitrate aqueous solution, stirring the mixture in a dark place, adding ascorbic acid and continuing stirring to obtain a silvernanoparticle / sulfonated oxidized graphene composite; dispersing the silver nanoparticle / sulfonated oxidized graphene composite into the water, and laying the silver nanoparticle / sulfonated oxidized graphene composite onto a titanium dioxide nanorod array through vacuum deposition and obtaining the titanium dioxide / sulfonated oxidized graphene / silver nanoparticle composite film through vacuum drying. The titanium dioxide / sulfonated oxidized graphene / silver nanoparticle composite film has the photocatalytic effect under ultraviolet light, has special wettability and underwater super-oleophobic / under-oil super-hydrophobic properties and can separate and degrade oil-water emulsion in situ to achieve extensive application in the aspects of effluent oil treatment and oil-water emulsion separation.

The invention discloses a strain of dibutyl phthalate degrading bacteria and application of the dibutyl phthalate degrading bacteria. The strain of dibutyl phthalate degrading bacteria D8 provided by the invention belongs to Elizabethkingiasp and is preserved in the China Center for Type Culture Collection, wherein the preservation date is March 23 2012; the preservation number is CCTCCNO:M2012088, and the GenBank accession number of a bacterial strain 16SrDNA is JQ673498. The bacterium is Gram-negative bacterium; the bacterial colony is yellow, round, smooth and humid; the brim is regular, and the centre protrudes. The bacterium utilizes dibutyl phthalate as sole carbon source and energy source to grow and breed. The bacterium can completely degrade 400mg / L of DBP (dibutyl phthalate) within 60 hours when being purely cultivated. The bacterial strain D8 can tolerate DBP of which the concentration can be up to 2000mg / L, and has excellent degradation effect on high-concentration DBP industrial wastewater. The bacterium is applied to bioaugmentation treatment of refinery waste water, pesticide wastewater, brewery wastewater and coking wastewater, and has excellent application prospect.

The invention relates to pseudomonas putida RXX-01. The class name of the pseudomonas putida RXX-01 of is Pseudomonas putida, the pseudomonas putida RXX-01 is preserved in China General Microbiological Culture Collection Center (CGMCC), the preservation address is 3#, Yard 1, West Beicheng Road, Chaoyang District, Beijing, the preservation date is November 1, 2016, and the preservation number is CGMCC No. 13224. The pseudomonas putida RXX-01 provided by the invention has the efficient degradation effect to DBP and DEHP combined pollution of soil and further has wide application prospects in the field of the repairing of phthalate-polluted soil.

The invention provides a composite temporary plugging agent for fracturing and a preparation method of the composite temporary plugging agent for fracturing. The composite temporary plugging agent isprepared from, on the basis of the total mass of the composite temporary plugging agent, 5-90% of polyglycolic acid, 0.1-3% of a non-crosslinking fracturing fluid thickening agent, 0.1-5% of an oxidant, 0.01-2% of an activating agent, 0.2-3% of inorganic base and the balance solvent. Polyglycolic acid has a great plugging performance and a complete and thorough degradation property and can be decomposed into carbon dioxide and water, and under the condition that a reservoir temperature is in a range of 30-240 DEG C, self-degradation of polyglycolic acid can be realized, and polyglycolic acid is also available for synergistic degradation with a gel breaker, so that artificially-controllable complete degradation can be realized, reservoir damages can be reduced, and reservoir production capacity is increased to the greatest extent.

The invention discloses bacillus radicicola capable of degrading pyridine as well as a breeding method and application thereof. The bacillus radicicola is bacillus radicicola (Rhizobiumsp.) by identification, and named (Rhizobiumsp.) NJUST18; the log-in number of GenBank is JN106368. The bacterial strain is preserved in the China center for type culture collection (CCTCC) on March 28th, 2013; the preservation number is CCTCC NO:M 2013110. Enrichment of pyridine degradation bacteria is carried out by directly adopting a culture medium taking pyridine as sole carbon source and nitrogen source; separation is carried out by adopting a screening culture medium taking the pyridine as the sole carbon source and nitrogen source; the screening process is quick and fast; sundry bacteria on the culture medium are few; the workload of affination is reduced. Compared with the other pyridine degradation bacteria, the bacterial strain has efficient pyridine degradation capability, good adaptive capacity and tolerance, and has a good application prospect in treatment of a high-concentration pyridine wastewater.

The invention relates to degrading bacteria capable of efficiently degrading pesticide chlorothalonil, and belongs to the field of biotechnology. A classification name of the degrading bacteria is Enterobacter cloacae B9; and a culture preservation number is CGMCCNo. 5527. Chlorothalonil is an organic chlorine farm-oriented broad spectrum bactericide and is proved to have very strong effects of carcinogenicity, teratogenicity and mutagenicity. Micro-biological degradation gains more and more significance because of rich bacteria resources in the environment without secondary pollution caused by introducing other chemical reagents. Microbe BJQ2 capable of degrading the chlorothalonil can be obtained by directional culture. The Microbe BJQ2 is identified as the Enterobacter cloacae B9 by morphology, physiological and biochemical analysis and 16SrDNA sequence homology alignment. The bacteria are the degrading bacteria by using the chlorothalonil as a sole carbon source. A degrading rate is 79.2% after being cultured for 6 days in an inorganic salt culture liquid; and a degrading rate is 92.3% after being used in a soil for 7 days. The degrading bacteria can be used for degradation of the bactericide chlorothalonil, and biological purification of water bodies, soil or agricultural products which are polluted by the chlorothalonil.

The invention provides a microbial soil improving agent for restoring petroleum polluted soil. A product is prepared from a degradation bacterial agent, an additive and a biosurfactant, wherein the degradation bacterial agent is prepared from pseudomonas, bacillus, Acinetobacter, microzyme, phosphate-solubilizing bacteria, azotobacterial, nitrobacteria and photosynthetic bacteria; the additive isprepared from the following ingredients in parts by weight: 20 to 35 parts of wormcast, 80 to 120 parts of bentonite, 1 to 10 parts of chitosan, 10 to 20 parts of kaolin, 5 to 9 parts of borax, 25 to35 parts of crop stalks, 10 to 15 parts of rice hull powder, 10 to 15 parts of dry seaweed, 1 to 5 parts of organic acid, 5 to 10 parts of vermiculite, 10 to 20 parts of shell powder and 20 to 25 parts of compound amino acid. The microbial soil improving agent for restoring petroleum polluted soil has the advantages that the soil fertility is improved; the petroleum in the soil can be degraded; the goal of governing the petroleum polluted soil is achieved.

The invention relates to a decomposition agent for branch composting treatment. The microbial agent is a solid biological microbial agent which is obtained by inoculating a composite bacterial liquidcontaining active ingredients of bacillus velezensis, bacillus arabinodoxae, bacillus megaterium, bacillus kaempferiae and bacillus megatherium on a solid fermentation substrate and fermenting, wherein the effective viable count of the microbial agent is not less than 1.0 * 10 < 10 > cfu / g. The cellulase activity, the laccase activity, the manganese peroxidase activity and the lignin peroxidase activity in the solid biological agent are not lower than 100.0 U / g, 1.0 U / g, 1.0 U / g and 1.5 U / g respectively, and when the solid biological agent is used for composting treatment, the degradation efficiency of lignin and cellulose can be improved, and the composting rate and quality can be improved.

The invention discloses a method for improving the sensory quality tobacco reconstituted through a papermaking method. Biotreatment is conducted twice on raw materials and sizing agents of the tobacco which is reconstituted through the papermaking method through crude enzyme obtained through microbial fermentation, the object of the primary biotreatment is raw materials obtained after extraction and tobacco rod rolling are conducted, biological enzyme penetrates through the surfaces of tobacco stems and shredded tobacco leaves obtained after extraction and tobacco rod rolling are conducted and the surface of tobacco powder and enters cell walls and middle lamella to act on chemical connection among lignin, cellulose and hemicellulose, and enzyme-promoting and defibrination functions are achieved while macromolecule matter is degraded. Secondary biotreatment is conducted in the latency process conducted before low-concentration defibrination and after high-concentration defibrination, the biological enzyme acts on sizing agent fiber, and the lignin, cellulose, hemicellulose, pectin, protein and other macromolecule matter are further degraded effectively. After biotreatment is conducted twice, cell wall matter in raw materials and the sizing agent and undissolved macromolecule matter can be degraded effectively, and the sensory quality of the tobacco reconstituted through the papermaking method is improved remarkably.

The invention discloses a bismuth oxyhalides photocatalytic environmental friendly coating and a preparation method thereof, and belongs to the technical field of coating. The invention specifically relates to a photocatalytic environmental friendly coating, which has functions of high-performance and pollution-free antibacteria and sterilization and degradation of organic contaminants in air in the presence of indoor natural light or under a condition exposed to sunlight, and a preparation method thereof. The bismuth oxyhalides photocatalytic environmental friendly coating is characterized in that: the coating is adopted as an interior and external wall coating which has functions of high-performance and pollution-free antibacteria and sterilization and degradation of organic contaminants in air in the presence of indoor natural light or under a condition exposed to sunlight. The coating comprises bismuth oxyhalides photocatalytic powder, a stuffing assistant and water, wherein the bismuth oxyhalides photocatalytic powder content is 1-10% by mass of a total mass of the coating, the stuffing assistant content is 40-80% by mass of the total mass of the coating, and the balance is water. The coating can be widely applicable for interior wall surfaces and external wall surfaces of buildings, and has characteristics of high photocatalytic efficiency, good stability, solid coating combining, unlikely discoloration, low cost and simple preparation.