155results about How to "High value utilization" patented technology

The invention discloses a method for producing potato flake with high dietary fiber content. The method comprises the following steps: after the byproduct of wet potato residue generated through flour-residue separation during potato starch production is subject to acid base interaction, oxidation or enzymolysis and micronization, the micronized dietary fiber of potato is mixed with mashed potatoes obtained through steaming, boiling and smashing in a certain content ratio, the mixture is dried through a roller dryer, the moisture content in the product is smaller than or equal to 10 percent, and the potato flake rich in dietary fiber is produced after crushing and sieving. The method of the invention is suitable for being implemented in whole potato processing production enterprises, the produced potato flake is rich in an excess amount of dietary fiber and can be used as an auxiliary material for processing other foods, therefore, the economic value of the byproduct of starch production, i.e., wet potato residue is greatly increased, and pollution to the environment is reduced.

The invention discloses a low-temperature dry distillation and high-temperature quick thermal decomposition treatment process method for municipal domestic garbage, and belongs to the technical field of treatment and utilization of the municipal domestic garbage. The method uses flammable gas generated in the high-temperature decomposition process to pretreat and dry the garbage and to heat a thermal decomposition furnace, gets rid of the garbage and changes waste material into things of value without exterior energy consumption, and achieves cyclic utilization of the garbage regeneration energy. The successful research and development of the yin and yang cyclic high-temperature thermal decomposition furnace solves key technology problem of garbage high temperature thermal decomposition technology and device. An organic garbage pressing molding technology effectively guarantees garbage batch treatment and heat value of regeneration carbon. The high-temperature thermal decomposition in a close anoxia condition in the garbage treatment process and use of additive restrain and eliminate the generation of the dioxin, and no dust or exhaust gas is directly discharged, so that a secondary pollution problem is solved. A garbage volume reduction rate and a resource use ratio are maximized.

The invention belongs to the field of lithium-sulfur battery cathode materials and particularly relates to a preparation method of a preparation method of biomass-based porous carbon / sulfur composite, comprising the specific steps of S1, calcining biomass material to obtain a primary product of carbon material; S2, removing impurities from the primary product of carbon material to obtain biomass carbon material; S3, mixing well the biomass carbon material with an activator and water, and calcining to obtain activated mixture; S4, removing impurities from the mixture to obtain activated porous carbon material; S5, mixing the porous carbon material with sulfur for the purpose of reacting to obtain the porous carbon / sulfur composite. The invention also discloses application of the porous carbon / sulfur composite as a cathode material in batteries or supercapacitors. A battery prepared with the biomass carbon / sulfur composite prepared herein has high discharge capacity, good cycle stability and high coulombic efficiency, and has a promising application.

The invention provides a processing method of fish jelly, and belongs to the technical field of the processing of food. The processing method comprises the following steps of: taking freshwater fish or sea fish as a raw material; removing viscera, head, tail, scales and bones of the fish; washing obtained fish clean; softening the fish bones and adding all fish bones into minced fish together with the fish scales; deodorizing, curing and refining the mixture, and refining the mixture through a colloid mill to obtain fish paste for preparation; selecting fresh carrots and producing the carrots into carrot juice; preparing the fish paste obtained after the dissolving and cooking of composite colloid, the carrot juice, as well as white granulated sugar, calcium lactate, citric acid and food flavorings in a certain proportion; completely stirring and uniformly mixing the mixture; and stuffing, sealing, sterilizing and cooling the mixture to obtain the fish jelly of various tastes. The fish jelly processed by the method contains protein, a plurality of vitamins, as well as microelements such as calcium, phosphorus and the like; the shelf life of the fish jelly is more than 12 months; the fish jelly has the advantage of having complete and rich nutrition, being free of fishy smell, and having good quality, and is suitable for all ages. When the method is used, the high-value utilization of the fish bones and the fish scales is realized, the utilization rate of the raw material is high, and the processing cost is low.

This invention discloses a method for utilizing all components of chloric plastic waste in pyrolysis / regeneration double fluidized beds. The method comprises: removing HCl and pyrolyzing in the pyrolysis fluidized bed, and regenerating antichlor CuO and releasing Cl2 in the regeneration fluidized bed. The two fluidized beds are connected via a connecting pipe, and CuO / CuCl2 are fluidized between the two plastic decomposition, thus can prevent apparatus corrosion and effectively utilize chlorine-free oil product. CuCl2 produced by reaction between HCl and CuO can be regenerated into CuO, and can obtain Cl2 with a high added value.

A high-performance superfine sand concrete cementitious material with waste stone powder and an application method thereof pertain to the field of construction materials. The method comprises the following steps: firstly, the waste stone powder is dried and sieved by a 200-mesh sieve, the sieved part and original particles of the water quenched blast furnace slag are mixed and ground to not more than 5% screen residue of 0.045mm square mesh sieve, wherein, the weight percentage of the waste stone powder is 30-40% and the weight percentage of the water quenched blast furnace slag is 70-60%; the water quenched blast furnace slag, mixed fine powder of the waste stone powder, original particles of cement clinker, a water reducing agent or a pumping agent are mixed and ground to not more than 5% screen residue of 0.045mm square mesh sieve according to a certain proportion, the powder obtained is the high-performance superfine sand concrete cementitious material. The cementitious material obtained, superfine sand and coarse aggregate are mixed to obtain the high-performance superfine sand concrete with good working performance, low dry shrinkage, no crack, high strength and good lasting quality. The material has the three beneficial effects of consuming waste stone powder, solving the problem of sand rareness in normal construction in part areas and promoting popularization and application of the high performance concrete.

The invention provides a high-valued comprehensive utilization method of lithium slag, in particular to mineral waste residues obtained by lithium extraction of spodumene by a sulfuric acid method. The high-valued comprehensive utilization method comprises the following steps: firstly, carrying out size mixing and stirring on the lithium slag and enabling sulfate mineral in the lithium slag to bein a dispersed suspension state; secondly, carrying out desulfurizing treatment on a product obtained in the first step by using a physical ore dressing mode to obtain desulfurized slurry and tailingdiscarding produced slag and enabling the sulfur content of slag phase in the desulfurized slurry to be smaller than or equal to 0.5 percent; thirdly, under the condition that the magnetic field strength is 0.5 to 2.0T, carrying out magnetic separation on the desulfurized slurry obtained in the second step to obtain magnetic separation slurry and magnetic separation tailings and reducing the content of ferric oxide in the magnetic separation slurry to be smaller than or equal to 0.05 percent; then concentrating, filtering and drying the obtained magnetic separation slurry to obtain a pyrophyllite raw material for glass fibers. The treatment method of the lithium slag, disclosed by the invention, has the advantages of greenness and environmental protection, obvious economic benefits and capability of realizing the leap of high-valued recycling of the lithium slag.

Belonging to the technical field of inorganic material preparation, the invention more specifically discloses a carbon coated micron silicon, a preparation method and application thereof. The method includes: reacting magnesium silicide with carbon dioxide in an atmosphere containing carbon dioxide, or decomposing magnesium silicide, then reacting the decomposed product with carbon dioxide, and conducting pickling to obtain the carbon coated micron silicon material. The preparation method is simple and practicable, can be used for large-scale production of carbon coated micron silicon, and cansolve the technical problems of complex technology, poor security, and no good for mass production application of carbon coated micron silicon materials in the prior art.

The invention relates to a method for carrying out remelting, reduction and modification treatment on massive steel slag. The method comprises the following steps of (1) mixing materials, uniformly mixing the massive steel slag and a reduced and modified material, and placing into a heating device; (2) increasing the temperature of a mixed material obtained from the step (1) to 1350-1550 DEG C, and stirring at the same time; (3) after the material is completely reacted, naturally separating molten iron from molten slag, discharging the molten iron, and then carrying out cooling treatment on the molten slag. The method disclosed by the invention has the advantages of no steel slag granularity and component limit, short flow, high-efficiency metal element recovery and environmental friendliness; according to the method, the tailings are used as hydraulic cementing materials.

The invention relates to a process method for preparing intermediate phase lignin and carbon fibers thereof. The process method is characterized in that a condensing agent is added for carrying out heat treatment reaction modification and further condensation polymerization on various lignin to obtain a polycyclic aromatic hydrocarbon substance with an intermediate phase, the polycyclic aromatic hydrocarbon substance is prepared into the intermediate phase lignin, and the intermediate phase lignin can be used for preparing various carbon materials. The high-intensity and high-modulus lignin carbon fibers can be prepared by melt spinning, pre-oxidation and carbonization of the intermediate phase lignin prepared by the method, and is comparable with high-performance pitch-based carbon fibers and high-modulus polyacrylonitrile-based carbon fibers.

The invention relates to a grading type condensing device for coal / biomass pyrolysis equipment. The grading type condensing device comprises a falling-film type condenser and a spray type condenser which are connected in series; The main body of the falling-film type condenser is cylinder-shaped, a pyrolysis vapor inlet is arranged on one side of the upper part of the falling-film type condenser, a tube type indirect heat exchanger is arranged in the middle part of the falling-film type condenser, and a liquid storage section is arranged at the lower part of the falling-film type condenser; and an air outlet is arranged on one side of the main body above the liquid storage section, and a first-grade liquid product outlet is arranged at the bottom of the main body. The main body of the spray type condenser is cylinder-shaped, atomizing nozzles are uniformly distributed at the inner top part of the spray type condenser, a liquid storage section and a coil heat exchanger are arranged at the inner bottom part of the spray type condenser, a liquid outlet is arranged on one side of the main body of the liquid storage section, the liquid outlet is communicated with an inlet of an oil pump, and an outlet of the oil pump is communicated with a liquid inlet at the top of the main body; and an uncondensable gas outlet is arranged on one side of the main body above the liquid storage section, and a second-grade liquid product outlet is arranged at the bottom of the main body. The grading type condensing device can be used for fully condensing high-temperature pyrolysis vapor and grading pyrolysis liquid products in the condensation process.

The invention discloses a threat information exchange sharing method based on a block chain, and the method comprises the steps: 1),a threat information block chain system is set with the system comprising comprises a threat information block chain, a synchronization node, and a plurality of maintenance nodes; a user registers as a threat information block chain user, and obtains a corresponding public key and a corresponding private key; 2) a threat information producer sets intelligent contract content on the system, signs the intelligent contract content with a private key and then issues the intelligent contract content to a threat information block chain; 3) the intelligent contract content signed issued by the information consumer synchronously is threatened, a private key used to sign and the content is broadcast through the system; 4) a maintenance node analyzes the content in the smart contract and packages the content into a new threat information block A; 5) a block A is broadcasted to the system, the maintenance node adds the block A to the threat information block chain after consensus of the block A is achieved, and 6) the maintenance node achieves consensus after confirming the effectiveness of the smart contract, creates a new block B and broadcasts a new block B through the system.

The invention discloses a multicast resource distribution and transmission method for a scalable video in a system with multiple base stations. The multicast resource distribution and transmission method is characterized by comprising the following steps that: (1), mobile equipment in one cellular cell receives data transmitted from different base stations; (2), a video flow is divided into a base layer and an enhancement layer; (3), a base station control centre selects one proper transmission base station for each video layer and determines which modulation coding manners are used; and (4), the multiple base stations transmit the video layers according to the appointed modulation coding manners and calculate the total number of the video layers received by the mobile equipment in the system and the utility value of the system. According to the invention, spectrum resources are effectively utilized; the utility value of the whole system is increased; the overall throughput of a network environment is effectively increased; and thus, the better video service quality is provided for users.

The invention relates to a method for extracting levulinic acid from biomass hydrolysate glucose. The method comprises the steps of by taking ionic liquid as a reaction system, and a solid acid catalyst as a catalyst, performing heating reaction, and specially comprises the steps of 1) mixing ionic liquid, glucose and distilled water, adding solid acid catalyst ZrP2, then reacting in a microwave heating reactor to obtain reaction liquid; 2) filtering the reaction liquid through a filter membrane, extracting clarified liquid with ethyl acetate, and collecting all extraction liquid; 3) rectifying the extraction liquid to obtain levulinic acid. The method has the advantages that the extraction method is simple to operate, fast in reaction speed, low in energy consumption and low cost, easy to operate, and safe and reliable; by introducing the ionic liquid reaction system, the energy consumption for producing levulinic acid can be greatly saved; through the introduction of the catalyst ZrP2, the occurrence of side effect can be decreased, the high-value utilization of glucose and cellulose can be realized, and remarkable economic benefits and environment benefits can be gained.

The invention discloses a poly-generation utilizing technological system for the ester extraction, the fermentation and the classification of white spirit vinasse, which gets rid of the traditional thought of utilizing a certain component of the vinasse or the whole vinasse as fuel and a feed, and transforms the vinasse into products with high additional value, such as a bouquet matter, alcohol, a protein feed, a raw material for making building materials, and the like. The method comprises the following basic steps of: firstly extracting the volatile matters in the vinasse, replacing the cooking with high pressure and long time by steam explosion with low pressure and short time, directly carrying out solid-state fermentation on the treated residual starch to generate alcohol, extractingthe alcohol generated by the fermentation by using the cyclic gas stripping of carbon dioxide during the fermentation, mechanically classifying the fermented materials by a special apparatus, separating a part which is rich in protein and starch from a rice hull part, carrying out direct or aerobic solid-state fermentation on the separated high-protein part to further increase the protein content, drying and crushing the high-protein part to be used as a high-protein feed, and using the separated rice hull part as the raw material of building materials directly or after drying treatment.

The invention provides a power communication network utility maximization resource allocation policy generation method based on Q-learning. The method comprises the following steps that a power communication network resource management model is established, wherein the power communication network resource management model comprises a resource management simulation platform, power communication network infrastructure and power communication business; the resource management simulation platform obtains information of the power communication network infrastructure; the resource management simulation platform obtains information of the power communication business; and the resource management simulation platform generates a resource allocation policy of power communication business based on the Q-learning. According to the method provided by the invention, a relatively fast convergence rate is achieved. Through comparison with a static resource allocation algorithm and a dynamic resource allocation algorithm, it proves that according to the method provided by the invention, under the condition of ensuring a relatively high resource utilization rate, power business obtains a relativelyhigh utility value, resource demands of relatively much business are satisfied, and the degree of satisfaction of a user is improved.

The invention discloses a method and a device for efficient resource utilization of chlorine-containing plastic waste, which belong to the technical field of resource utilization of solid waste. Coupling the two processes of pyrolysis of chlorine-containing plastic waste to fuel oil and high value-added conversion of HCl generated by pyrolysis, so as to achieve the goal of efficient resource utilization of all components of chlorine-containing waste, and process chlorine-containing plastic in a fluidized bed cracking The HCl of the waste is removed by heat and further thermally cracked, while the capture and catalytic conversion of HCl to chlorine is carried out in the fixed bed of the monolithic catalyst. The catalytic tower is catalytically upgraded to obtain chlorine-free fuel. The invention can obtain chlorine-free high-quality fuel oil, and at the same time, the contained chlorine elements can be converted with high added value, thereby realizing efficient multi-component resource utilization of PVC chlorine-containing wastes.

The invention provides a pervious straw fiber concrete and a production method thereof. The method comprises the following steps: unwinding plant straws into dispersed straw fibers, carrying out alkali liquor steam curing on the straw fibers and silica micro-powder to form silica micro-powder coated modified straw fibers, and uniformly mixing the silica micro-powder coated modified straw fibers with high-calcium fly ash, fine aggregates, a water reducer and water to obtain the pervious straw fiber concrete. Steam oxygen of gaseous oxidation aggregated silica micro-powder makes the gel coated straw fibers have good dispersibility, permeability and thickening property, and the modified fibers formed by the coated straw fibers have a thickening property, so a formed straw fiber network has good water permeability, the adhesion force between a cement mortar and the fine aggregates and between the cement mortar and the straw fibers is enhanced, and the strength of the concrete is greatly improved; and the method effectively recovers agriculture and forestry straws, and realizes the high-value comprehensive utilization of solid wastes.

The invention relates to a method for pre-treating wood chips by hot water before preparing chemi-mechanical pulp. The method comprises the following steps: after soaking the wood chips, spirally extruding the wood chips; adding water into the wood chips which are spirally extruded, carrying out self-hydrolyzing pre-treatment on a mixture of the wood chips and water, and obtaining a pre-hydrolysate and the wood chips after self-hydrolyzing pre-treatment; and collecting the extruded wood chips as a raw material of chemi-mechanical pulp to obtain the wood chips after pre-treatment by hot water. The pre-treatment method provided by the invention fully uses existing part of equipment in the pulping industry without external complex equipment, and only water, small amount of dilute acids and ethanol are used without purchasing other chemicals, so that the pre-treatment process can be realized, thereby greatly saving the comprehensive production cost. Meanwhile, the method is beneficial for effectively combining pulping and papermaking with bio-refinery by existing enterprises.

The invention discloses a method for preparing an alkaline brucite crystal whisker by directly adding bittern into alkali liquid. The method comprises the following steps: measuring the concentration of magnesium ions in the bittern; adding 0.4mol / L to 1.0mol / L of a sodium hydroxide solution into the bittern while stirring; subsequently reacting for 48h at the temperature of 30 to 38 DEG C; and filtering, washing precipitates and drying to obtain the alkaline brucite crystal whisker, wherein the mole ratio of sodium hydroxide to the magnesium ions is 1 to 15, and the adding speed of sodium hydroxide is 20mL / min to 50mL / min. By controlling the addition amount, adding speed and adding concentration of the alkali liquid, the method disclosed by the invention can be used for simultaneously obtaining three types of alkaline brucite crystal whiskers; the length to diameter ratio of the three types of alkaline brucite crystal whiskers satisfies the requirements of the crystal whiskers; the purity of the crystal whiskers satisfies the requirements of industrial application; high-value utilization of magnesium resources in a salt field is realized.

The invention discloses a method for preparing p-coumarate by catalyzing lignin depolymerization through hierarchical pore molecular sieve loaded molybdenum oxide. The method comprises the following steps: by taking lignin as a raw material, adding a reaction medium and a hierarchical pore molecular sieve loaded molybdenum oxide catalyst, replacing with nitrogen, pressurizing to 0.1-1MPa, heatingto 120-160 DEG C, reacting for 2-10 hours while stirring, removing the catalyst after the reaction, and catalytically degrading the lignin into p-coumarate. By regulating and controlling the catalyststructure, the reaction medium and the reaction condition factors, high-yield and high-selectivity depolymerization of lignin is achieved, p-coumarate serving as a high-added-value chemical is obtained, and the purpose of high-valued utilization of lignin is achieved. The heterogeneous catalyst is used, the process is simple, reaction conditions are mild, lignin can be selectively converted to obtain the target product p-coumarate, and the yield and selectivity of p-coumarate can reach up to 11.78 wt.% and 85.24 wt.% respectively.

The invention discloses a multicast resource allocation and transmission method based on a scalable video in a multi-base station heterogeneous network. The multicast resource allocation and transmission method is characterized by comprising the following steps: 1, grouping base stations in the network; 2, dividing a transmitted video stream into a base layer and a reinforced layer; 3, selecting a suitable transmission scheme for each video layer by a base station control center; and 4, calculating an utility value of the whole system by the system according to the number of video layers received by users. By adoption of the multicast resource allocation and transmission method disclosed by the invention, the spectrum resources can be effectively used, the utility value of the whole system is increased, and the overall throughput of the network environment is effectively improved, thereby providing better video services for the users.

The invention provides a semiconductor substrate / chromium-containing bimetallic alkaline phosphate photoelectrode and a preparation method thereof. According to the invention, transition metal salt and potassium nitrate are added in chrome plating waste liquid to prepare an electrolyte, then is transferred into an electrolytic bath, the semiconductor substrate is taken as a work electrode, enables electro-deposition under room temperature, under negative potential, nitrate in a solution is reduced on the work electrode to generate hydroxyl, metal ions in the solution is reacted to hydroxyl, and then deposited on semiconductor surface, and the semiconductor substrate is performed with photoelectric chemical treatment in a phosphate buffer solution to obtain the semiconductor substrate / bimetallic alkaline phosphate photoelectrode. According to the invention, operation is sample, reaction condition is mild, chromium plating waste liquid is taken as a reaction raw material, and the method is suitable for high-efficiency recovery and high value utilization of metallic element in the chromium plating waste liquid. The semiconductor substrate / chromium-containing bimetallic alkaline phosphate photoelectrode can be directly used for a photo-electro-chemical catalysis reaction, and reaction performance is obviously increased.

The invention discloses a preparation method of an instant gracilaria agar with a low freezing point. The preparation method comprises the following steps: taking gracilaria as the raw material, removing the salt and sand from gracilaria by a roller, processing gracilaria by alkali, acidifying and bleaching the gracilaria, cooking gracilaria to obtain gel, crudely filtering the gel, cooling to a temperature of 55 DEG C to obtain an agar crudely-filtered solution; then processing the solution by a compound enzyme preparation, heating to inactivate the enzyme, carrying out fine filtration, condensing the solution under vacuum, adding alcohol into the solution to trigger flocculation, separating the solid from the liquid, drying the solid in vacuum, grinding the solid, and sieving so as to obtain the instant gracilaria agar with a low freezing point. In the agar crude filtration step, a compound enzyme preparation is added to process the gel solution so as to maximally degrade the alga fibers, and thus the enzyme preparation can be completely inactivated more easily. The alcohol is used to flocculate the gel solution, thus the safety and hygiene of the gracilaria agar can be guaranteed, and at the same time the yield of agar is increased. The technologies of diaphragm press filtration and vacuum drying can guarantee that alcohol is fully recycled and utilized. The freezing point of the prepared agar is not higher than 30 DEG C, the agar can be completely dissolved in 10 minutes at a temperature of 80 DEG C, the extraction yield is not less than 15.5%, the lead (Pb) content is not more than 0.5 mg / kg, the arsenic (As) content is not more than 0.3 mg / kg, and the total number of bacterium is not more than 1000 cfu / g.

A three-dimensional lignin porous carbon / zinc oxide composite material and its preparation and application in the field of photocatalysis are disclosed. The method includes preparing a lignin / zinc oxide precursor composite by a hydrothermal method from a zinc salt, a weak alkali salt and an industrial lignin, and preparing a three-dimensional lignin porous carbon / zinc oxide composite material by high temperature calcination of the lignin / zinc oxide precursor composite. The composite material has a regular three-dimensional pore structure, with zinc oxide nanoparticles uniformly embedded among the three-dimensional lignin porous carbon nanosheets. Application of the composite material to the field of photocatalysis, especially as a photocatalyst for photocatalytic degradation of organic dye pollutants, can significantly improve the degradation efficiency and rate, and has potential application value in the field of photocatalytic degradation of organic pollutants.

The invention discloses a method for preparing a high-performance flaky porous structured zinc ferrite anode material by using a jarosite residue sulfate leaching solution and application thereof. Bydirectly using the jarosite residue sulfate leaching solution as the raw material and adding a zinc source to adjust the molar ratio of zinc to iron to 1:2, the high-performance flaky porous structured zinc ferrite anode material is prepared. The prepared high-performance flaky porous structured zinc ferrite anode material can be applied to preparation of high-performance lithium ion batteries. Byhigh-value utilization of the zinc source and the iron source in the jarosite residue, waste of resources and environmental pollution are reduced. Meanwhile, preparation conditions of the method areeasy to control, and thus the method is suitable for large-scale production. The prepared nanometer zinc ferrite has good cyclic stability and rate performance as an anode material for lithium-ion batteries.

The invention discloses a method for preparing antioxidant peptide by enzymatic hydrolysis of pig skin, which comprises the following steps: 1) taking pig skin as raw material, cutting off surface oiland fat, and cutting into 1-2cm wide strips, beatening for standby; 2) placing the homogenate of the step 1) in an enzymatic hydrolysis tank for enzymatic hydrolysis defatting; 3) adding 1 volume ofdrinking water into the aqueous phase and the solid phase obtained in the step 2), adjusting the pH to 7.3, and then adding 2% of the pigskin protein rich substance; 3% complex proteinase (flavor proteinase: alkaline proteinase: papain = 1: 3: 2), the temperature is 50 DEG C, the hydrolysis time is 8h, the enzyme is inactivate, and the pigskin antioxidant peptide is obtained by centrifugation, ultrafiltration, concentrate and drying the powder in turn. The invention has the beneficial effects that the antioxidant peptide is prepared from pig skin by the enzymatic hydrolysis method, green environmental protection and high-value utilization of pork processing by-products are realized, the preparation process is simple, and the prepared peptide powder has good antioxidant activity.

The invention discloses a method for synthesizing a novel water purifying agent by utilizing steel acid pickling waste liquid. The method specifically comprises the following steps: (1) enabling the concentration of hydrogen ions in the acid pickling waste liquid to be not higher than 2mol / L and the total iron concentration to be not lower than 0.5g / L by adopting a physical or chemical method; (2)carrying out electrolytic treatment on the acid pickling waste liquid by taking one noble electrode as a positive electrode and the other noble electrode or an iron electrode as a negative electrode,and depositing iron ions in the negative electrode in a form of an iron element or iron compound; (3) putting the negative electrode in a strong alkaline electrolyte after depositing a certain amountof iron or iron compound on the negative electrode, carrying out electrolytic treatment by as a positive electrode, and converting iron on the positive electrode into strong-oxidation ferrate by utilizing oxidation of the positive electrode; (4) enabling the ferrate to exist in a strong alkaline solution in a form of a solute or an insoluble substance, and forming the novel water purifying agent.The method disclosed by the invention has the advantages that emission of industrial waste is reduced, the resource is saved, high-value utilization of the iron ions can be realized, and a very goodapplication prospect is obtained.

The invention discloses a plastic packaging bag material capable of being utilized by means of biodegradation and a method for preparing the plastic packaging bag material. The plastic packaging bag material comprises, by weight, 100 parts of polyvinyl alcohol, 20-80 parts of distillers' grains, 2.5-10 parts of citric acid monohydrate, 30 parts of glycerin and distilled water. The distilled wateraccounts for 0-10% of the total mass of the plastic packaging bag material. The method includes drying and smashing the distillers' grains; preparing polyvinyl alcohol solution from polyvinyl alcoholsolid, heating the polyvinyl alcohol solution, adding citric acid and the glycerin into the polyvinyl alcohol solution, stirring the citric acid, the glycerin and the polyvinyl alcohol solution to obtain mixtures, carrying out sufficient reaction on the mixtures, then adding the distillers' grains into reaction products and continuing to stir the distillers' grains and the reaction products to obtain distillers' grains-polyvinyl alcohol suspension; drying the distillers' grains-polyvinyl alcohol suspension to obtain thin films; immersing the thin films in water for 1 hour, taking the thin films out of the water, and drying the thin films for the adjusted drying time to obtain distillers' grains-polyvinyl alcohol composite thin film materials with the water contents of 0-10%; carrying out extrusion tape casting processes or solution casting forming techniques to obtain biodegradable plastic packaging bags. The plastic packaging bag material and the method have the advantages that the plastic packaging bag material is easy to produce, products are short in degradation time and can be used for compost, and waste can be efficiently utilized in a recycled manner.