30results about How to "Fast natural degradation" patented technology

The invention relates to a Xanthobacter and its snail killer. A snail bacterium, namely Xanthobacter autotrophicus is a Xanthobacter autotrophicus II whose collection unit. It uses beef peptone agar plate or slope culture medium to separate bacterial strains, obtains snail-killing Xanthobacter autotrophicus solution (a hundred million grades/ml) by bottle-shaking fermentation process; and the application of Xanthobacter autotrophicus as a snail killer is that: making ultrasonic processing on the Xanthobacter autotrophicus solution and plant material forming agent, then mixing them to prepare a novel biological snail killer, which has the characters: (1) quickly killing the snail, and effectively preventing the snails from climbing up to flee; (2) harmless to non-target living things and fish, fast to naturally degrade and no pollution; (3) no toxic and side effect, and time of maintaining snail-killing pesticide effect 15 days long; (4) convenient to store, transport and use; etc.

The present invention relates to a Streptomyces violaceoruber and its molluscicides, wherein said Streptomyces violaceoruber is Streptomyces violaceoruber I which is preserved at China typical culture preservation center (CCTCC) with a preservation identification serial number of M203102 and a preservation date at 20030803. The bacterial strain is separated and activated by adopting Gao synthesized number 1 vegetable gelatine flat plate or inclined surface culture medium, and the Streptomyces violaceoruber bacterium solution with molluscidal functions is then cultured through fermentation by using a swing bottle; the Streptomyces violaceoruber bacterium solution and the plant pelleting additive are mixed to constitute a molluscicide. The Streptomyces violaceoruber in accordance with the present invention possesses stronger molluscidal effect, and the molluscicide formulated by the Streptomyces violaceoruber bacterium solution and plant pelleting additive possesses the following advantages: 1, without toxic and side effects and pollutions for the environment, it can be naturally degraded rapidly; 2, without toxic and side effects for persons and animals, it can maintain a long molluscidal time (longer than 15 days); 3, it is convenient to store, convey and use; 4, it has more improved molluscidal effect than pure bacterium solution and pure bacterium powder, with reduced drug amount; 5, relative pure plant powder, it has improved medical effects and prolonged time for maintaining the medical effects.

The invention relates to the technical field of soil remediation, particularly to a method for remediating contaminated soil and underground water. The method comprises the steps that (1) an injectionwell is built on the upstream of underground water in a polluted area, and an intermittent reaction wall is built on the downstream of the underground water in the polluted area, wherein the pollutants in the polluted area comprise volatile and/or semi-volatile organic matters; and (2) a biosurfactant slurry is injected into the injection well to migrate the biosurfactant to the polluted area under the action of the underground water to contact the pollutants in the polluted area, and the obtained oil-water mixture flows to the intermittent reaction wall, enters a permeable reaction area under the blocking of an impermeable wall area, and reacts. The method provided by the invention can effectively remove volatile and semi-volatile organic compounds in polluted soil and underground water,and is especially suitable for repairing sites which cannot be excavated, extracted and injected above a polluted area.

The invention relates to the technical field of soil remediation, in particular to a method for remediating contaminated soil and underground water. The method comprises the steps that (1) an injection well is built on the upstream of underground water in a polluted area, a collecting ditch is built on the downstream of the underground water in the polluted area, wherein pollutants in the pollutedarea comprise volatile and/or semi-volatile organic matters; and (2) a biosurfactant slurry is injected into the injection well to enable the biosurfactant to migrate to the polluted area under the action of underground water, and enable an obtained oil-water mixed solution to enter the collecting ditch to obtain an upper-layer oil phase and a lower-layer water phase. According to the method, thevolatile and semi-volatile organic matters in the polluted soil and underground water can be effectively removed; compared with the existing extraction method and PRB method, the method provided by the invention has the characteristics of high treatment efficiency and simple operation, and is especially suitable for repairing sites which cannot be excavated, extracted and injected above the polluted area.

The invention provides a degradable food packaging bag, relating to the technical field of packaging bags. The degradable food packaging bag is prepared from the following components in parts by weight: 20-45 parts of low density polyethylene, 25-40 parts of metallocene linear low density polyethylene, 15-35 parts of a polypropylene random copolymer, 5-15 parts of a calcium carbonate master batch, 10-20 parts of a stearic acid coupling agent, 1-15 parts of oxidized oil, 3-10 parts of a plasticizer, 2-8 parts of aucubin and 5-9 parts of an organic anti-sticking agent. By adding a reasonable compound additive, the prepared degradable food packaging bag can be reasonably, rapidly and naturally degraded, so that the environment-friendly performance of the degradable food packaging bag is remarkably improved, and the generation of a new pollution source is avoided.

The invention discloses a plant molluscicide as well as a preparation method and application thereof. The molluscicide consists of the following components in percentage by weight: 1-40% of a mother medicine and 60-99% of an auxiliary agent. The preparation method comprises the following steps: (1) removing grease of tea seed meal; (2) adding tea seed meal powder into a 5-18% sodium hydroxide solution of which the weight is 5-6 times that of the tea seed meal powder, soaking for 4-5 hours at 85-105 DEG C to obtain a soaking solution, then adding alkaline protease which accounts for 5-20% of the soaking solution in weight into the soaking solution, soaking for 10-14 hours at 55-75 DEG C, filtering to obtain a filtrate and a filter cake, and drying the filter cake to obtain the auxiliary agent; (3) neutralizing the filtrate by using 5-10% hydrochloric acid until precipitates cannot be separated out any more, centrifuging, removing supernatant liquid to obtain lower-layer precipitates, and drying the lower-layer precipitates to obtain the mother medicine; and (4) crushing the mother medicine and the auxiliary agent into 100-300 meshes, and then uniformly mixing. The molluscicide disclosed by the invention has the advantages of high efficiency, low toxicity, environmental protection, easiness in degradation, low cost, safety, convenience and the like. The method disclosed by the invention is simple, feasible, simple in technological process, and slight in pollution to the environment.

The invention relates to the technical field of polymer materials, and in particular to a high-strength and easily-degradable composite material for a garbage bag. The composite material comprises thecomponents of polyvinyl chloride resin, polyamide resin, a TPVC (Thermoplastic Polyvinyl Chloride) elastomer, metamorphic starch, a compatibilizer, a plasticizer, a reinforcing agent, a degradation catalyst and a stabilizer, wherein the compatibilizer is maleic anhydride grafted polyethylene; the stabilizer is a calcium-zinc composite stabilizer; the reinforcing agent is carbon black; and the plasticizer is dibutyl phthalate, isosorbide diester or butyl triacetate; a photocatalyst is a compound formed by mixing nano zinc oxide, anatase titanium dioxide and polylactic acid in a mass ratio of 2:5:10. The composite material has high strength, good toughness and remarkable weather resistance and has the characteristics of high degradation rate and fast degradation speed.

The invention discloses a waterless closestool, which comprises a closestool body and a suction device. The closestool body comprises a urinal, a seat board and a cover plate, wherein the cover plateis movably arranged on the urinal; and the seat board is movably arranged between the cover plate and the urinal. The suction device is provided with a suction cavity, wherein one end of the cavity iscommunicated with an exhaust port of the urinal, while the other end is used for connecting an external drain outlet. The suction device in a start-up state is used for closing one end connected withthe external drain outlet, generating negative pressure for sucking contents in the urinal in the suction cavity, and relieving the sealing of the end of the suction cavity connected with the external drain outlet when the negative pressure disappears. The waterless closestool sucks egesta from the urinal and discharge the egesta through the suction cavity by adopting the negative pressure of thesuction device and fluid which flows at high speed; compared with the conventional closestool using water to flush, the waterless closestool only needs little water or even does not need water, thereby saving great amount of water, and generating remarkable economic and social benefit.

The invention relates to an environment-friendly plant straw which comprises a straw body and a protective layer, the protective layer covers the outer surface of the straw body, and the straw body ismade of natural straw, rice stem, grass stem, reed stem, bamboo stem, fern stem, shrub stem or liana stem. The protective layer is a naturally degradable protective film or an environment-friendly coating layer. The straw has the advantages that most of the tubular materials are annual plants or fast-growing plants, obvious or difficult-to-recover damage to the environment cannot be caused in thecollecting and processing process, the straw can be used as fuel to recycle energy and can also be quickly and naturally degraded after being used, plastic fragments cannot be accumulated in a humanbody, and soil and water bodies cannot be polluted; meanwhile, the protective layer is arranged on the surface of the plant stem, the straw body can be protected, and the situation that use is affected by damage during bending is avoided.

The invention provides a degradable plastic bag for reducing red tide, and a preparation method thereof. The plastic bag comprises, by weight, 40-50 parts of modified polyvinyl alcohol, 20-25 parts ofmodified starch, 20-25 parts of waste plant fibers, 20-30 parts of a nano-porous polystyrene adsorbent, 10-20 parts of polyethyleneimine, 8-12 parts of polyacrylamide, 10-15 parts of polyaluminum chloride, 5-10 parts of nano-microencapsulated sulfurized bacteria, 0.5-1 part of 1,2-dibromoethane and 2-3 parts of glycine. The plastic bag produced from the components of the plastic bag through the manufacturing method can adsorb heavy metal ions and organic chemical substances in water or the natural environment in the gradual degradation process, and also achieves the dual technical effects ofadsorbing seaweeds, bacteria, nitrogen and phosphorus elements and other factors causing the red tide and further promoting the degradation of the plastic bag.

The invention provides a single-component polyurethane foam joint mixture and a preparation method thereof. The formula of the single-component polyurethane foam joint mixture comprises the following components in parts by weight: 14-22 parts of mixed polyether, 1.2-2 parts of silicone oil, 0.2-0.8 part of a water diversion agent, 15-17 parts of C14-C17 alkane liquid paraffin, 0.6-1.2 parts of a catalyst, 2-4 parts of an insecticide, 2-6 parts of a degradation agent, 1.5-4.5 parts of a slow-release fertilizer, 0.5-1.5 parts of an aging color indicator, 38-40 parts of polyisocyanate MDI, 14-18 parts of a foaming agent and 1-3 parts of CO2. The single-component polyurethane foam caulking agent has the following beneficial effects: 1, the product adopts an insecticide, so that corresponding agricultural crops and plants are prevented from being damaged by insect pests; the fertilizer utilization rate is increased, the crop yield is increased, compound fertilizer is added, and accurate and comprehensive fertilization is achieved; 3, a water diversion agent and a degradation agent are added, so that the growth of roots of crops is promoted, the product is quickly and naturally degraded, and the cleaning cost after use is reduced; and 4, using is convenient, aerosol packaging is used, the requirements of modern agriculture are met, and storage stability and safety are good. The invention also discloses a preparation method of the single-component polyurethane foam joint mixture.

The invention belongs to the technical field of tableware cleaning powder, and particularly relates to tableware cleaning powder prepared from a pure natural plant extraction matrix and a food-grade alkaline ingredient and a preparation method of the tableware cleaning powder. Ecological environment-friendly tableware cleaning powder is prepared from the following raw materials in parts by weight:77-80 parts of rice husk powder, 16.5-20 parts of an alkaline substance, 0-3 parts of Chinese honeylocust fruit powder, 0-1 part of folium artemisiae argyi powder, 0-0.5 part of rose flower powder, 0-0.5 part of sweet osmanthus flower powder, 0-0.5 part of crape myrtle flower powder, 0-0.5 part of clove flower powder and 0-0.5 part of jasmine flower powder. The cleaning powder provided by the invention gives full play to the natural and moderate sand state and hardness of the plant extraction matrix powder, can combine the degradation ability of the alkaline substances on oil stains, and realize effective cleaning of tableware in a combined action mode of physical friction polishing and chemical degradation dissolution removal. Due to the green, environment-friendly and residue-free physicochemical characteristics, multiple indexes such as convenience in use, high cleaning capacity, no damage to skin and surfaces of utensils, high stability and safety coefficient, no garbage residue and the like are realized, and the daily life requirements of people can be greatly met.