48results about How to "Increased biodegradation rate" patented technology

The invention discloses a bio-electrochemical enhanced waste water treatment device, which is characterized in that: anodes which are soaked in water and are uniformly distributed are fixedly arranged in an aeration basin; the anodes are connected with cathodes which float on the surface of a water body through leads; and a resistor is connected in series to the leads. In the treatment device, electrochemical and biochemical treatment technologies are integrated, molecular oxygen in the air can be directly utilized, and aeration in the biological treatment process of waste water is eliminated or reduced, so that the treatment device has the advantages of good waste water treatment effect, low energy consumption, long electrode service life and small investment.

[Problem] To provide a biodegradable resin composition which permits the biodegradable resin to quickly decompose.

[Means for Solution] The biodegradable resin is blended with a polyglycolic acid and an ester decomposition promoter of an inorganic particulate material that promotes the hydrolysis of the polyglycol.

The invention belongs to the field of water treatment, relates to the field of treatment of wastewater containing pollutants, and concretely relates to a preparation method and an application of a plastic with an anthraquinone compound-grafted surface. The preparation method comprises the following steps: a plastic is hydrophilically treated with plasma, a strong oxidant, ozone, gamma-ray, an electron beam or an ion beam, and then is treated with an epoxy silane coupling agent to obtain an epoxy modified plastic; and the epoxy modified plastic is reacted with an amino group-containing anthraquinone compound to obtain the plastic with the anthraquinone compound-grafted surface. The plastic with the anthraquinone compound-grafted surface can accelerate the biodegradation of azo dyes, nitrates and the like, can be recycled and reused, can be reused after being simply treated, can be reused for 10 times or above, and can be used to treat wastewater containing azo dyes, nitrates and the like.

The invention provides a membrane distillation bioreactor device and a method for treating wastewater or waste liquid by using the device. In the membrane distillation bioreactor device, membrane distillation technology and biological degradation technology are combined, a hydrophobic microporous membrane component is immersed in a biological reactor, latent heat resources such as solar energy andwaste heat are used to heat wastewater to be treated to produce a steam pressure difference between two sides of the membrane to recover water resource, operation energy consumption is saved greatly,and operation cost is saved. A high temperature condition is favorable for improvement in the activity of microorganisms and the biological degradation speed. In the process, a membrane separation process is free from the influences of biological degradation degree, system operation starting requires short time, and effluent is stable and high in quality and meets the standards for reverse osmosis water. The device has the outstanding advantages of simple structure, simple process, low operation energy consumption, small floor area occupation, high biological degradation speed and the like and has a great practical value for the improvement and development of high organic wastewater treatment and high-purity water preparation technology.

The invention discloses a poly lactate geycollic acid and polycaprolactone complex fiber, a preparation method and application thereof, and an operation suture line. The complex fiber comprises a poly lactate geycollic acid fiber and a polycaprolactone complex fiber, wherein the poly lactate geycollic acid fiber is used as a core layer of the complex fiber, and the polycaprolactone fiber is used as a skin layer of the complex fiber. The preparation method comprises the following steps: obtaining poly lactate geycollic acid slices and polycaprolactone slices respectively; and performing composite spinning on the poly lactate geycollic acid slices and the polycaprolactone slices, wherein the poly lactate geycollic acid is used as the core layer, and the polycaprolactone covers the poly lactate geycollic acid to form the skin layer of the complex fiber so as to obtain the poly lactate geycollic acid and polycaprolactone complex fiber. The composite fiber can be used for the operation suture line. The operation suture line is prepared from the complex fiber. The complex fiber can not only alleviate the characteristic of easy degradation of the poly lactate geycollic acid fiber, but also can enhance the flexibility of the poly lactate geycollic acid fiber.

The invention discloses a polyhydroxy alkanoates graft polymer and a preparation method thereof; the polyhydroxy alkanoates graft polymer is prepared by the following ingredients by weight parts: 100 parts of polyhydroxy alkanoates, 01-15 parts of grafting monomer, 0-5 parts of initiator and 0-5 parts of antioxidants. The polyhydroxy alkanoates graft polymer changes the molecular structure of thepolyhydroxy alkanoates, improves the heat stability thereof and further quickens the biological degrading ratio; in addition, the compatibility of the polyhydroxy alkanoates graft polymer and inorganic filling materials, such as CaCO3, talcum powder and the like and the polarity blending material is improved, and the polyhydroxy alkanoates graft polymer has high practical and economical values.

The invention belongs to the field of water treatment, relates to the field of treatment of wastewater containing pollutants, and concretely relates to a preparation method and an application of a plastic with the surface being grafted with graphene and an anthraquinone compound. The surface of a plastic is hydrophilically modified to obtain active groups such as a hydroxyl group and a carboxyl group, the reactive groups react with an amino group-containing silane coupling agent to make the surface of the plastic have the amino group, the amino group reacts with the carboxyl group on the surface of the graphene oxide, the remaining hydroxyl group, carboxyl group or secondary amino group and a sulfonyl chloride group-containing anthraquinone compound undergo a dehydrochlorination reaction,and the graphene oxide is further reduced to obtain the plastic with the surface being grafted with graphene and the anthraquinone compound. The plastic obtained in the invention can significantly accelerate the biodegradation of azo dyes, nitrates and the like, can be reused for 10 times or more, and can be widely used in the field of sewage treatment.

The invention belongs to the technical field of biological purification for organic waste gas, and discloses a method for improving the processing of high-load n-hexane waste gas by a biotrickling filter. According to the method, activated sludge is adopted to carry out inoculation on the biotrickling filter, domestication is conducted under low-load n-hexane waste gas, after the domestication is finished, the n-hexane waste gas is improved to be within the range of a high load, microorganisms which are domesticated well under the low load are exposed out of the high-load n-hexane waste gas, a bio-surfactant is added in a nutrient solution of the biotrickling filter, the nutrient solution is evenly distributed on padding in the biotrickling filter through a spraying device, and the microorganisms decompose the n-hexane into CO2, H2O and cytoplasm. According to the method, shock load resistance is strong, on the condition that an operation device and the operation condition are not changed for an existing biotrickling filter, the purification effect of the biotrickling filter on the hydrophobe n-hexane waste gas can be improved, the biodegradation rate is increased, the removal efficiency is improved, the operation cost is low, and operation is easy and stable.

The invention relates to an antistatic biodegradable foaming material and a preparation method thereof and belongs to the technical field of foaming material, which solves the problem of declining ofmechanical property of material due to adding a large ratio of antistatic agent when the method of the antistatic property of the poly(p-butyleneadipate-co-terephthalate) foaming material needed to beimproved in the prior art. The antistatic biodegradable foaming material is prepared from the following components in parts by weight: 60 to 100 parts of poly(p-butyleneadipate-co-terephthalate), 0 to 40 parts of biodegradable polymer, 1 to 15 parts of antistatic agent, 1 to 5 parts of inorganic filler, 0.5 to 15 parts of foaming agent, 0.01 to 5 parts of foaming additive, and 0.1 to 5 parts of crosslinking agent. The antistatic biodegradable foaming material has the advantages that the antistatic property is excellent, the physical property is excellent, the water-resistant property is good,the durability is good, the foaming rate is higher, and the mechanical property can be regulated in the wide range.

The invention discloses a starch acetate-polydioxanone graft copolymer/inorganic particulate nano composite material which is prepared from a starch acetate-polydioxanone graft copolymer base material and nanometer inorganic particulates, wherein the weight ratio of starch acetate to graft copolymers is 1 to 40:100, and the weight ratio of the nanometer inorganic particulates to the starch acetate-polydioxanone graft copolymers is 0.5 to 10:100. The invention also discloses a preparation method of the starch acetate-polydioxanone graft copolymer/inorganic particulate nano composite material. Because the starch acetate and the nanometer inorganic particulates are introduced into the copolymer, the production cost is reduced, the thermal property, the mechanical property and the biodegradation rate of the polydioxanone are increased, and the preparation method has lower requirements for a monomer and a reaction condition and has simple operation, high production efficiency and no environment pollution.

The invention provides a bamboo powder coated paper. The coated paper comprises raw paper and a composite coated material; the composite coated material comprises a coated layer, and the preparation components of the coated layer comprise bamboo powder and degradable plastic; the degradable plastic is prepared from polylactic acid, poly(butylene succinate) and a copolymer of butylene adipate and butylene terephthalate. The bamboo powder and the degradable plastic including polylactic acid (PLA), polybutylene succinate (PBS) and the copolymer (PBAT) of butylene adipate and butylene terephthalate are used as main raw materials, and undergo processes of blending, extrusion or pressing and the like to prepare the composite material. The coated film obtained from the material prepared in the invention is water-proof and oil-proof, overcomes the defects of low variability, low strength and the like of bamboo, has the excellent characteristics of low water absorptivity, easiness in regeneration and recovery, corrosion resistance and the like, and has a wide market prospect.

The invention discloses a preparation method of a biodegradable cool fabric, and belongs to the technical field of weft knitted fabric preparation. According to the key points of the technical scheme, the method comprises the following steps of S1, selection of raw materials including a base material, a biodegradable additive and a cool additive; S2, dilution and granulation of the biodegradable additive; S3, preparation of biodegradable cool fibers; S4, spinning; S5, weaving; S6, dyeing; S7, dewatering; and S8, setting. According to the preparation method of the biodegradable cool fabric, the biodegradable cool fabric has better biodegradability and wearing comfort.

The invention provides a full-biodegrade composite material taking oriented poly butylene succinate as a nucleating agent and a preparation method of the full-biodegrade composite material. The full-biodegrade composite material comprises the following components in mass percent: 30-70% of poly butylene succinate and 70-30% of poly ethylene succinate. The preparation method comprises the following steps: 1) drying poly ethylene succinate in vacuum at 25-40 DEG C, and drying poly butylene succinate in vacuum at 60-100 DEG C; 2) putting 0-100% of poly ethylene succinate and 0-100% of poly butylene succinate into a screw extruder, and carrying out blending and extruding to obtain a composite material; 3) carrying out single-side rolling and plate pressing on the composite material of poly ethylene succinate and poly butylene succinate at appropriate processing temperature; and 4) taking out the molded composite material, and carrying out heat treatment on the molded composite material at the temperature below the melting point of poly ethylene succinate, so as to obtain the composite material. The full-biodegrade composite material is simple and feasible in process, low in cost, easy to realize industrialization and obvious in economic value.

The invention relates to a degradable cotton swab and a preparation method, and relates to the field of medical supplies, the degradable cotton swab is prepared from the following raw materials by weight: 110-130 parts of poly (butylene succinate), 70-90 parts of polylactic acid, 15-25 parts of a filler, 5-10 parts of a flexibilizer, 3-5 parts of a compatilizer, and 1-2 parts of a degradation accelerator; the preparation method of the degradable cotton swab comprises the following steps: S1, heating the poly (butylene succinate), the polylactic acid, the filler, the flexibilizer, the compatilizer, the degradation accelerant, an anti-static additive and an antibacterial agent to 120-150 DEG C according to a set proportion, and stirring for 20-25 minutes to obtain a blended material; S2, extruding and cooling the blended material to obtain a raw material rod; S3, cutting the raw material rod to obtain a formed cotton swab. The handle of the cleaning verification cotton swab can be degraded, and the cleaning verification cotton swab can have the antistatic and antibacterial effects at the same time.

The invention discloses a soil and underground water in-situ synergistic repair method. The method comprises the steps that a carbon element, a nitrogen element and a phosphorus element are added intoreinjection water, the weight ratio of the carbon element to the nitrogen element to the phosphorus element (C:N:P) is 100:5:1, a petroleum degradation bacterium with the concentration being 5,000-10,000 mg/L accounting for 0.5-1.2% of the total volume of the reinjection water is added into the reinjection water, meanwhile, aeration is performed on the reinjection water, the aeration amount is kept at 1.5-2 mg/L, and therefore final reinjection water is formed; a liquid charge pump extracts the final reinjection water from a biological enhancement adjusting tank, and reinjects the reinjectionwater into a stratum through reinjection, and in-situ synergic repair of soil and underground water is achieved. The biology growth speed is high, the biologic degrading speed is high, contaminated soil and underground water can be rapidly repaired, the repair effect is good, the repair technology is simple, the repair cost is low, contaminated soil does not need to be excavated in large area, alarge number of water resources are saved, and no secondary pollution is caused.

The invention discloses biodegradable foamed polypropylene, and particularly relates to the technical field of high polymer materials. The biodegradable foamed polypropylene is prepared from the following raw materials: a polypropylene resin, starch, calcium hydroxide, vinyl acetate, a dispersing agent, an antioxidant, a foaming nucleating agent, a photodegradation agent and a toughening agent. According to the invention, calcium hydroxide and the vinyl acetate are used for modifying starch, an alkaline earth metal calcium hydroxide is used for primarily modifying the starch so as to improve the compatibility of the starch, and then ceric ammonium nitrate is used for carrying out graft copolymerization reaction on the vinyl acetate and the starch so as to greatly improve the compatibility of the modified starch after graft copolymerization, so that the mixing effect of the starch and the polypropylene is good so as to effectively improve the biodegradation rate of the polypropylene material; the photodegradation rate of the polypropylene material can be effectively improved by adding the photodegradation agent while the foamed polypropylene material is treated by utilizing biodegradation and photodegradation so as to greatly improve the degradation rate of the foamed polypropylene material.