603results about How to "Completely degraded" patented technology

Provided herein are methods and compositions for performing PCR with primers with blocked 3′-ends that are unblocked when these primers anneal to the template. The multiplexed PCR can be used as real-time qPCR, for end-point detection or as enrichment method for next generation sequencing (NGS). Also described herein are methods and compositions to improve sensitivity of mutation-specific PCR when targeting closely-spaced mutations.

The invention relates to a kieselguhr-based porous ceramics, a preparation method thereof and a method for loading Ag doped with nano TiO2 on the same, belonging to the technical field of a kieselguhr inorganic material. The kieselguhr-based porous ceramics is made from kieselguhr, a sintering auxiliary agent, a dispersing agent, a binder and water in the weight ratio of 60-92:8-40:0.01-2:0:001-1:100-450. The kieselguhr-based porous ceramics has functions of absorption and filtration, and can absorb granules in fluid when the fluid passes through the lieselguhr-based porous ceramics. Ag doped with nano TiO2 is loaded on the kieselguhr-based porous ceramics to generate kieselguhr-based porous ceramics loading the Ag doped with TiO2. The laden anatase-type nano TiO2 has large specific surface area. The effects of filtration, photochemical catalysis and sterilization of the kieselguhr-based porous ceramics loading the Ag doped with nano TiO2 are greatly increased.

The invention discloses an in-situ injection-extraction-water replenishing circulatory disposal system for organic contaminated soil and groundwater and a combined remediation method. The system is consist of an injection well, an extraction well, a water replenishing well, a water treatment facility, a dispensing facility. The method comprises the following steps: extracting a pollution source or groundwater in a seriously polluted area to the ground for processing, then using the processed groundwater as a preparation drug or as replenished water to be directly injected to the underground, and injecting the drug into the underground pollution plume area through the injection well. The system and the method are used for processing the organic contaminated soil and groundwater in situ and have the advantages of being small in disturbance, environmental-friendly, short in remediation cycle and wide in range of application and has no secondary pollution.

The invention discloses a novel C3N4 / ZnO / Fe2O3 composite photocatalyst and a preparation method thereof. The method comprises the following steps: preparing a carbon nitride (C3N4) catalyst and a ZnO / Fe2O3 catalyst, then mixing according to the proportion, grinding and preparing the C3N4 / ZnO / Fe2O3 composite photocatalyst. The novel C3N4 / ZnO / Fe2O3 composite photocatalyst has the advantages that the photocatalytic efficiency is high, photocatalysis can be carried out in the range of ultraviolet band and visible light wavelength, the application range is wider, high-efficiency degradation can be carried out on wastewater, especially pollutants in the dye wastewater, the degradation is thorough and the used time is short; the method is simple in operation, mild in reaction condition, does not use toxic and harmful substances as materials, and is green and environment-friendly, thus avoiding secondary pollution.

The invention relates to a method for jointly treating stalks by steam explosion and microorganism fermentation, comprising the following steps of: firstly, carrying out steam explosion pretreatment on the stalks to obtain exploded stalks; then preparing spore seed liquid: inoculating aspergillus oryzae or trichoderma Koningi to a PDA (Potato Dextrose Agar) culture medium, standing and culturing for 3-5 days at the temperature of 28-32 DEG C, and preparing the spore seed liquid with the concentration of 106-108 per mL; and finally carrying out microorganism fermentation: uniformly mixing 18g of exploded stalks, 2g of bran and 30mL of mineral element nutrient solution, adjusting pH to be 7.0 with Ca(OH)2, sterilizing for 15min at the temperature of 121 DEG C and the pressure of 0.15MPa to obtain a solid fermentation medium a, inoculating the spore seed liquid according to 2-4% of inoculum size, and culturing the spore seed liquid for 5-7 days at the temperature of 28-32 DEG C. The fermentation stalks obtained by utilizing the method have low content of lignose, cellulose and hemicellulose and high activity of filter paper carbohydrase, CMC (carboxymethyl cellulose) enzyme, amylase and protease.

The invention relates to the technical field of industrial wastewater biochemical treatment and discloses a broad-spectrum bio-energizer for industrial wastewater treatment. The broad-spectrum bio-energizer contains the following components of: by weight, 1 part of enzyme, 0.15-0.4 part of a micro-element nutrition, 0.15-0.4 part of hormone, 1.5-2.5 parts of organic acid, 2.5-3 parts of a nitrogen nutrition and 0.8-1.2 parts of a phosphorus nutrition. The broad-spectrum bio-energizer can be used to promote rapid growth of various bacteria and fungi in a complex environment, promote the pollutant decomposition ability of microorganisms, raise an industrial wastewater biochemical treatment system's capability of recovering fluctuation of water quality and quantity and improve treatment efficiency of the system.

The invention discloses a supercritical water oxidation treatment system for printing and dyeing wastewater and sludge. The system comprises a concentration pretreatment device, a supercritical water oxidation device, an oxidizing agent supply device and a wastewater recycling system, wherein the concentration pretreatment device comprises a waste liquid storage tank, a nanofiltration membrane concentration module and a printing and dyeing sludge storage pool, the oxidizing agent supply device comprises a liquid oxygen storage tank, a liquid oxygen gasifier and a buffer tank, and the supercritical water oxidization device comprises an auxiliary heating supercritical water oxidization reactor, a methyl alcohol starting preheater, a methyl alcohol preheater and a waste liquid preheater. The system can be used for realizing efficient, clean and harmless treatment of high-concentration printing and dyeing wastewater and sludge at low cost.

The invention relates to a method for preparing a degradable material, in particular to a method for preparing a polylactic acid degradable material, which comprises the following steps: 1, preparing 50 to 80 weight percent of polylactic acid, 10 to 40 weight percent of acetyl cellulose, 1 to 10 weight percent of biodegradable polyester, 1 to 10 weight percent of plasticizer and 1 to 5 weight percent of nano organic modified montmorillonite; 2, filling the polylactic acid, acetyl cellulose, biodegradable polyester, plasticizer and nano organic modified montmorillonite into a high-speed mixer,and stirring uniformly; and 3, filling the uniformly mixed raw material into a granulator for blending, melting, extruding, cooling and granulating and thus, obtaining the degradable material. The preparation method has the advantages that: the process is simple; the raw materials are mixed by a one-step process; and the prepared material can be obtained by granulation in a double-screw extruder.The product made of the degradable material prepared by the method has high rigidity and excellent performance indexes.

The invention discloses a waste gas processing method and device collaborating vacuum ultraviolet light catalysis with ozone catalytic oxidation. The waste gas processing method comprises the following steps: after particulate impurities in waste gas are removed, the waster gas enters a vacuum ultraviolet light catalysis chamber; a pollutant is directly split by the ultraviolet light emitted by an ultraviolet lamp, and free radicals with high oxidizability and ozone substances are generated at the same time so as to further oxidize the pollutant; in a composite catalyst structure formed by compounding a photocatalyst layer and an ozone catalyst layer, the residual pollutant is further purified through the collaboration of vacuum ultraviolet light catalysis and ozone catalytic oxidation, and the ozone is totally utilized and eliminated at the same time. The waste gas processing device comprises a reactor, wherein an efficient filter and the composite catalyst structure are arranged in the reactor; the composite catalyst structure is formed by compounding the photocatalyst layer and the ozone catalyst layer; the light catalysis chamber is formed at the inner cavity zone between the efficient filter and the composite catalyst structure, and the ultraviolet lamp is arranged in the light catalysis chamber. The waste gas is purified by utilizing the collaboration of vacuum ultraviolet light catalysis and ozone catalytic oxidation.

The invention relates to bio-enzyme gel breaker, in particular to formula and technique for gel breaking of water-based guargum fracturing fluid by using the bio-enzyme gel breaker. The bio-enzyme gel breaker contains the following components in percentage by weight: 10-50% of beta- mannose, 0-20% of cellulose, 0-10% of pectinase, 0-15% of glucanase, 0-10% of xanthase, 3-10% of (NH4)2SO4, 2-5% of NaCl, 1.5-5% of ZnCL2 and 0-60% of persulfate. The fracturing fluid gel breaking technique comprises the following steps: dissolving the bio-enzyme gel breaker in borax crosslinked fluid; mixing and blending the crosslinked fluid and the guargum base fluid, crosslinking, forming jelly, and then mixing with proppant, pressing the mixture into the oil-water well until the mixture enters the fractured crack. In this way, the fracturing process is finished. The bio-enzyme gel breaker degrades the macromolecular guargum in the stratum fracturing fluid into small micromolecular sugar, and when the jelly breaks up, the proppant is left underground, the fracturing gel breaking fluid flows back, and in this way, the construction can be completed. The bio-enzyme gel breaker has good gel breaking performance, the construction process is reasonable, the viscosity of the fracturing fluid can not decrease too early, the gel of the fracturing fluid can be broken evenly and thoroughly with little residue and small harm to the stratum, and the operation is simple and convenient.

The invention discloses a low-energy drying treatment method for discharged sludge. The method comprises the following steps: after adding water into discharged sludge in a first reaction tank so as to carry out physical degradation on the discharged sludge and then uniformly stirring the obtained mixture completely, conveying the obtained discharged sludge with water content of 80% to a second reaction tank; adding a chemical reagent into the second reaction tank so as to carry out chemical conditioning and modification on the discharged sludge, then carrying out mechanical filter pressing on the sludge so as to reduce the water content of the sludge to 40-45%, and preparing the sludge into mud cakes; and ventilating and drying the mud cakes in a greenhouse shed so as to reduce the content content of the sludge to 20-30%. The method disclosed by the invention is suitable to be applied to the reclamation and reduction treatment of discharged sludge of municipal wastewater treatment plants, and the volume of the treated sludge is reduced by more than 70%, thereby effectively saving landfill land resources; the sludge treatment method is simple in operation, low in cost and low in energy consumption; by using the method disclosed by the invention, harmful substances in the sludge can be degraded completely, thereby avoiding the secondary pollution to the environment; meanwhile, the mud cakes can be directly used as boiler fuel so as to recycle heat energy.

The invention discloses a biological sediment modifier for a fishpond, belonging to the technical field of water quality purification of fishponds. The biological sediment modifier is prepared from the following raw materials in parts by weight: 3-8 parts of bacillus subtilis powder, 3-8 parts of nitrifying bacteria powder, 3-8 parts of denitrifying bacteria powder, 3-8 parts of sulfurizing bacteria powder, 10-40 parts of zeolite powder, 40-70 parts of sodium humate, and 0.5-3 parts of calcium peroxide, wherein the total content of viable bacteria is 2*10<8>-2*10<9> per gram. The biological sediment modifier disclosed by the invention can be used for absorbing the nutrition of sediment, and forming a bacterium membrane on the sediment via fermentation, breeding and bacterial community expansion, so as to cover the sediment and prevent the sediment from polluting water quality, thus benefiting the growth of aquatic animals, greatly increasing a degradation rate, and avoiding the secondary pollution of chemical degradation to a water body.

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 discloses a preparation method for a composite photocatalyst Bi2O3 / g-C3N4. The preparation method comprises the following steps: preparing g-C3N4, namely calcining a carbon and nitrogen source at the temperature of 400-1000 DEG C to prepare g-C3N4; mixing Bi2O3 solid with the g-C3N4 prepared in step 1, and grinding; calcining the grinded mixture at the temperature of 400-1000 DEG C to prepare the composite photocatalyst Bi2O3 / g-C3N4. The invention further discloses application of the composite photocatalyst Bi2O3 / g-C3N4 prepared by the method in sewage treatment, in particular, in the aspect of dye sewage.

The invention discloses a hydrophilic carrier for microbial biofilm formation. The hydrophilic carrier comprises a hollow short tube, and a first concentric ring and a second concentric ring which are sequentially concentrically arranged outside the hollow short tube, wherein the surface of the outermost second concentric ring is toothed; and the microbial filler is composed of the following components in parts by weight: high-density polyethylene, low-density polyethylene, white lime, Dow powder activated carbon, light calcium carbonate, maleic anhydride, dicumyl peroxide, gelatin, chitin, ferroferric oxide magnetic powder and manganese-zinc ferrite. The density of the microbial filler is 0.96-0.98 g / cm<3>. The hydrophilic carrier for microbial biofilm formation prolongs the contact time between microbes and organic matters, so that the organic matters are degraded quickly and thoroughly; and the biological oxidation can restore the surface adsorption capacity of the activated carbon.

Well treatment particulates are coated with polyionic material and a composite is formed comprising multiple layers of polyelectrolyte, each layer composed of polyionic material counter to the polyionic material of the polyelectrolyte layer to which it is adjacent.

The invention relates to a fully biodegradable aliphatic polycarbonate mulch film and a preparation method thereof. The mulch film comprises the following raw materials by weight ratio: 30-50 parts of aliphatic polycarbonate butanediol ester, 10-50 parts of starch, 10-50 parts of polylactic acid, 1-5 parts of herbicide, 1.0-3.5 parts of antiblocking agent, 0.5-6 parts of lubricant, 4.0-15 parts of plasticizer, 1.5-4 parts of heat-resistance stabilizing agent, 0.05-1.5 parts of anti-oxidant, 0.5-2.0 parts of coupling agent, 0.05-1.5 parts of biodegradation promoter and 0.5-5.0 parts of photodegradation agent. The Fully biodegradable aliphatic polycarbonate mulch film can be prepared by mixing and stirring the raw materials and extruding to granulate by a twin-screw machine. The fully biodegradable aliphatic polycarbonate mulch film of the invention has the advantages of low cost, good temperature toleration, temperature tolerance and water resistance, and is capable of regulating the degradation rate and has the function of weeding.

The purpose of the invention is to provide an integrated process for processing mother liquor generated in the process of preparing glyphosate to solve the problems of higher cost and resource solution in glyphosate mother liquor processing. The process comprises the steps of: pre-treatment of mother liquor, integrated film separation, oxidation treatment, crystal separation, chemical phosphorus removal, film separation dechlorination and biochemical treatment. According to the sales condition of water aqua, the dosage of the mother liquor going into a film separation system is adjusted; the market demand is adapted; meanwhile, the cost is controlled; the influences of device maintenance and the like are avoided, and normal operation of a glyphosate production device is guaranteed. The glyphosate obtained from integrated film separation can be used for producing 33% of glyphosate ammonium salt agent; organic phosphorus obtained from crystal separation and chemical phosphorus removal can be applied to phosphate fertilizer production; sodium chloride solution obtained from film separation can be applied to chlor-alkali production, and the other parts can go into biochemical treatment and be discharged with standards.

The invention discloses a phycomycete mixed microorganism preparation, a preparation method and the application thereof. The microorganism preparation provided by the invention is prepared by mixing sterile pure scenedesmus, alkane degrading bacteria GS3C, phenanthrene-degrading bacterial GY2B and pyrene degrading bacteria GP3. The combination of the alkane degrading bacteria and aromatic hydrocarbon degrading bacteria plays an excellent role in complementary degradation for alkane and aromatic hydrocarbon substance which are the main components in petroleum contamination. Algae can provide O2 needed by metabolizing crude oil for bacteria, and the simultaneously generated CO2 is utilized by the algae for growing. The mixed preparation can efficiently degrade and restore the petroleum contamination. Under the condition of crude oil contamination with the initial volume concentration of 0.3%, linear chain and branched paraffin which is difficult to degrade in alkane can be more thoroughly removed within 7 days, and the removal rates for naphthalin, fluorine, phenanthrene and homologous compound in aromatic hydrocarbon respectively reach over 96%, 58% and 61%.

The invention discloses a membrane bio-reactor (MBR) used for treating preserved szechuan pickle wastewater and reinforcing biological phosphorous and nitrogen removal. An integrated reactor is formed by an A<2> / O process, a biological membrane process and the MBR. The MBR comprises an anaerobic tank, an anoxic tank, an aerobic tank, a feeding system, an aerating system, a drainage system and automatic control equipment, wherein semi-soft biological membrane fillers are put in the anaerobic tank, the anoxic tank and the aerobic tank; a membrane component is put in the aerobic tank, and a membrane separation region is not independently arranged. The reactor has the advantages that anaerobic phosphorus release and phosphorus accumulation in the aerobic tank are carried out via the sludge on the biological fillers in the anaerobic tank, thus increasing the total removal rate of phosphorus in the sewage; organic matters undergo hydrolytic acidification and organic nitrogen is aminated after the preserved szechuan pickle wastewater passes through the anaerobic tank; nitrification liquor in the aerobic tank flows back to the anoxic tank to form denitrification in the anoxic tank. The MBR has a simple structure and high pollutant treatment efficiency, is light in membrane pollution, and can simultaneously treat the pollutants such as organic matters, total nitrogen, total phosphorus, SS and the like of high salinity wastewater.

This invention relates to a preparation method for a compound high efficient microbe preparation used in processing waste water including: A, selecting and cultivating, B, fermenting and cultivating the preparation of oxygen and anaerobic compound microbes, C, fermenting and cultivating the preparation of aerobic microbes, D, mixing them. 1, the preparation prepared in this invention is avirulent and will not cause second time pollution, 2, microbes in this preparation can degradate organics and ammonia nitrogen pollutant factors thoroughly due to multikind of microbes and quick speed to degradate pollutants in waste water, 3, output of mud is less, the life time is long and its settlement is good, 4, the preparation method is simple.

Belonging to the technical field of yellow rice wine brewing, the invention relates to a method for brewing yellow rice wine with extruded rice raw material with or without an enzyme. The invention first provides a processing method for extruding a rice raw material with or without an enzyme, and then provides a method for applying the extruded rice raw material with or without an enzyme in yellow rice wine production. Compared with existing patent technologies for brewing yellow rice wine through a traditional rice steeping and steaming method, the method of the invention improves raw material gelatinization degree, saccharification rate and raw material utilization rate, shortens fermentation period, and produces finished wine with unique and heavy flavor. Besides, by changing original rice steaming gelatinization into expansion gelatinization, the method provided in the invention can avoid sewage generation, simplify process, improve operation condition, lower starch loss, and reduce equipment and building investment.

The invention relates to a Microorganisms or / and biological enzyme extracting method for plant anthocyanin, belonging to the technical field of biological engineering. The method comprises the following steps of: classifying plants containing anthocyanin for smashing, adsorbing water, freezing the plants, heating the plants for thawing, pressing the plants, filtering for making juice, cracking and degrading the anthocyanin by the microorganisms or / and the biological enzyme cracking anthocyanin glycosidic bond, utilizing an anion active agent for precipitation reaction, degrading the precipitate by the microorganisms, and carrying out precipitation separation and evaporation concentration. Cation anthocyanin with the real content of more than 95%, namely color primitive but not the anthocyanin can be obtained by the technology of the invention. The cation anthocyanin made by the invention does not need human intestinal microorganisms for degrading, and is directly adsorbed and utilizedby a human body or directly goes into human blood. The medical care value of the plant anthocyanin is much higher than that of the anthocyanin.

The present invention provides a microbial fermented composite antibiotic-free feed containing natural antibacterial components. The feed comprises a fermented product based on the united segmented fermentation of aerobic-anaerobic composite strains, composite natural antibacterial components, a non-plant source protein / polypeptide compound nutrient supplement agent, and an additive comprising atleast a soybean protein amino acid / polypeptide compound chelate. The composite strains comprises at least lactic acid bacteria, bacillus subtilis, yeast selected from candida utilis or saccharomyces cerevisiae, and enterococcus faecalis. The fermented product based on the united segmented fermentation is prepared by carrying out secondary fermentation on fermentation raw materials through the aerobic-anaerobic composite strains. The combination of the microbial fermented feed and the natural antibacterial components is beneficial to the balance of intestinal flora of animals, and can prevent the dysbacteriosis of digestive tracts, improve the immunity functions of animal organisms, reduce or replace the use of feed antibiotics, and significantly improve the digestion and absorption efficiency of the feed and the meat quality of animals.

The invention relates to a preparation method of a ZnO / MoS2 nanosheet compound photocatalyst. The photocatalyst with low price and high efficiency is obtained by doping a small amount of zinc oxide into molybdenum disulfide; specifically the photocatalyst is prepared by reacting the zinc oxide, sodium molybdate dehydrate and thioacetamide through a hydrothermal method. The ZnO / MoS2 nanosheet compound in the invention can quickly degrade organic pollutants, particularly dye organic pollutes, in waste water into non-pollution substances such as H2O and CO2 under normal temperature, normal pressure and illumination, and the ZnO / MoS2 nanosheet compound has lasting photocatalytic activity.

The invention discloses a kind of use ditch oil or slops incompatible highly effective washes clothes with the soap powder method, including the ditch oil or slops the incompatible pretreatment, the ditch oil or slops the incompatible acidification, the ditch oil or slops the incompatible saponification, the saponified fluid synergize, bestows on the shape, makes grain, is dry and so on the step. The invention method, both reduced the ditch oil either slops incompatibly and has stopped up the derelict land ditch oil to the environment pollution from the source or slops incompatible two edible, has guaranteed people's health, moreover also provides the sufficient raw material supply for the fat chemistry, simultaneously this method also has the soap powder decontamination strength which the production cost low, makes to be strong, not injurying also the non- pollution characteristic, has the better application promotion value.

The invention relates to precious metal-doped ZnO nanoscale particles and a use thereof. The precious metal-doped ZnO nanoscale particles are ZnO / Ag and ZnO / Pd nanoscale particles which are prepared from zinc acetate, sodium hydroxide, silver nitrate and palladium chloride by an ethanol auxiliary hydrothermal method, wherein the diffraction peak of ZnO belongs to a hexagonal wurtzite structure; a space crystal group of ZnO belongs to P63mc(186); a point lattice constant a of ZnO is equal to a point lattice constant b of ZnO and is equal to 0.3249nm; a point lattice constant c of ZnO is equal to 0.5205nm; the diffraction peak of Ag is in accordance with a standard map JCPDF:87-0717; a space crystal group of Ag belongs to Fm-3m(225); a point lattice constant a of Ag is equal to a point lattice constant b of Ag, is equal to a point lattice constant c of Ag and is equal to 4.086nm; the diffraction peak of Pd is in accordance with a standard map JCPDF:88-2335; a space crystal group of Pd belongs to Fm-3m(225); and a point lattice constant a of Pd is equal to a point lattice constant b of Pd, is equal to a point lattice constant c of Pd and is equal to 3.900nm. The use of the precious metal-doped ZnO nanoscale particles comprises that the precious metal-doped ZnO nanoscale particles are utilized as a photocatalyst for unsymmetrical dimethylhydrazine wastewater degradation. Compared with the prior art, the precious metal-doped ZnO nanoscale particles have good morphology and a high degree of crystallization; a preparation method of the precious metal-doped ZnO nanoscale particles is simple and has good repeatability; a result of a test shows that the precious metal-doped ZnO nanoscale particles can be degraded faster and more thoroughly under sunlight; and the precious metal-doped ZnO nanoscale particles have a lower production cost, better energy-saving effects and a certain referential meaning for industrial application.

The present invention relates to treatment of printing and dyeing waste water. The process of treating printing and dyeing waste water includes the following steps: regulating pH value with acid, oxidizing with the Fenton reagent, cavitation treating with high pressure jet, coagulating sedimentation, adsorbing with fly ash and regulating pH value before exhausting. The present invention features the organic combination of high pressure cavitation jet and the Fenton reagent in treating printing and dyeing waste water. The present invention has obviously raised COD eliminating rate and decolorizing rate, high energy utilizing rate and other advantages.

The invention discloses a green ecotypical toilet which comprises an excrement and urine separation system, an excrement decomposing and treating system (2), a urine purifying system (3), an ecological wetland (7) and a clear water backflow system (4), wherein the excrement and urine separation system at least comprises an excrement and urine separator (1); an excrement outlet of the excrement andurine separator (1) is communicated with an inlet of the excrement decomposing and treating system (2), and an urine outlet of the excrement and urine separator (1) is communicated with an inlet of the urine purifying system (3); outlets of the excrement decomposing and treating system (2) and the urine purifying system (3) are both communicated with an input end (71) of the ecological wetland (7); and an output end (72) of the ecological wetland (7) is connected with the clear water backflow system (4). Compared with the prior art, the invention respectively degrades excrement and urine intoreusable clear water more sufficiently and complete, and realizes the self recycling use of the water system and the recycling use of light energy and wind energy, thereby achieving the purposes of no discharge, no pollution, clean and sanitary environment, environmental protection and energy saving.

The present invention relates to a producing technique of degradable medical device. The polylactic acid is taken as raw material and is processed with a plastic film blowing machine and a plastic injection machine for producing various medical devices. The medical device can be easily and totally degraded in natural environment and therefore has the advantages of no pollution, energy conservation, and actual green environment protection.