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195 results about "Detoxification method" patented technology

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Wet detoxification method of hexavalent chromium contained alkali waste residues

InactiveCN102614620ATo achieve the purpose of reduction and detoxificationEasy to restore and detoxifyProcess efficiency improvementChemical industryReaction temperature
The invention belongs to the technical field of chromium chemical industry and chromium salt clean production, and in particular relates to a wet detoxification method of hexavalent chromium contained alkali waste residues. According to the method, the method comprises the following steps of: first, slurrying the chromium residues; and then adjusting the pH value of the slurry to 7-10; adding a stabilizing agent and a reducing agent to the completely slurried slurry at 20-150 DEG C; and reducing the hexavalent chromium to trivalent chromium, wherein the trivalent chromium can stably exist in the chromium residue for a long period. The leaching toxicity of the obtained chromium residue, which conforms to State Environmental Protection Industrial Standard issued by the Ministry of Environmental Protection, is less than 3 mg/L. Compared with the prior art, the wet detoxification method of the hexavalent chromium contained alkali waste residues, provided by the invention, has the advantages of simple process, less usage of the reducing agent, low cost, complete reduction of the hexavalent chromium, no rebound, low reducing reaction temperature, suitability for industrial production and better promotion and application prospect.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI +1

Sub-step flotation and detoxification method for incineration fly ash of medical garbage

ActiveCN104275245AAchieve recyclingReduce secondary synthesisFlotationResource utilizationDecomposition
The invention discloses a sub-step flotation and detoxification method for incineration fly ash of medical garbage. The sub-step flotation and detoxification method is characterized in that coseparation of dioxin and a carbon component is realized by first-step flotation, so that the toxicity of organic pollutants including the dioxin and the like in the fly ash is reduced; meanwhile, soluble heavy metal is eluted; second-step flotation of tail slurry is subjected to a sulfide precipitation flotation method and heavy metal including Pb, Zn and the like is removed and recycled, so that the harms of the heavy metal are eliminated. Separated final products mainly comprise enriched carbon, residual ash, heavy metal sediment salt and the like, wherein the enriched carbon rich in the dioxin is conveyed into a garbage incinerator secondary incineration chamber to be incinerated, so that the high-temperature decomposition of the dioxin is realized by a low cost; the volume and the toxicity of the residual ash are greatly reduced and the residual ash is directly conveyed into a municipal solid waste landfill to be safely treated or reutilized, so that the subsequent treatment cost is greatly reduced; the heavy metal in the fly ash is leached with an acid and vulcanized and then is precipitated, floated and recycled, so that a plurality of purposes are realized. The method can realize harmless treatment and resource utilization of the incineration fly ash of the medical garbage under environment-friendly and low-cost conditions.
Owner:TIANJIN CHENGJIAN UNIV

Biological detoxification method for camellia seed cakes

The invention relates to a biological detoxification method for camellia seed cakes. According to the invention, dipotassium hydrogen phosphate, magnesium chloride, 2000-4000U/g of acidic cellulase, microbe strains, and the like are added to crushed camellia seed cake; the mixture is well mixed by stirring, and is subject to a reaction for 10-15 days under a temperature of 40-50 DEG C under the effects of both the microbes and the acidic cellulase; an obtained material is dried by baking, and is crushed, such that a finished product is obtained. Tea saponin content in the obtained product is lower than a safety index of a feedstuff standard, and the nutritive value of the product is higher than non-fermented camellia seed cakes. Protein content of the product reaches 15-20%, which is improved by more than 5%. Free amino acid content of the product is higher than 5%, which is improved by more than 25%. Reducing sugar content in the product is higher than 5%, saponin content in the product is lower than 1.0%, and a detoxification rate of the product is higher than 90%. The product can be directly used as a feedstuff, such that a problem of camellia seed cake intoxication in prior art is solved. The production method is advantaged in simple technology and good effect. With the method, non-toxic camellia seed cakes satisfying the requirements of the feedstuff standard can be provided.
Owner:林元山

Improved method of excess calcium hydrate detoxification during cellulose ethanol production

A method for improving the detoxification of excess calcium hydrate during cellulose ethanol production relates to the method for improving the detoxification of the excess calcium hydrate. The invention solves the problems of big dosage of calcium hydroxide and low converting rate of cellulose ethanol of existing detoxification methods of the excess calcium hydrate, the method comprises the following steps: firstly, preparing a steam explosion straw, secondly, preparing filtrate A and a filter residue, thirdly, preparing filtrate B, fourthly, placing the filtrate B into the residue and adjusting the PH, then carrying out the damp-heat disinfection, adding cellulose and saccharomyces cerevisiae, then carrying out the saccharifying and fermentation, namely completing the improvement of the detoxification of the excess calcium hydrate during cellulose ethanol production. The invention not only reduces the dosage of the calcium hydrate, and the dosage is only 50%-60% of that of the prior art, but also improves the conversion rate of the cellulose ethanol to 84%-95% from the original 75%-79%, and can be widely applied in the production technologies. The method of the invention has the advantages that the required equipment is simple, and the cost of raw materials is low.
Owner:HARBIN INST OF TECH

Food detoxification machine and detoxification method

The invention relates to a food detoxification machine and a detoxification method. The food detoxification machine comprises an electrifying device, a processing chamber, a pulse generation device, a control unit, a temperature control unit, and a water feeding and discharging unit, wherein the electrifying device is connected with an external power source to supply power for the food detoxification machine, the pulse generation device comprises a high-voltage pulse power supply and at least one pair of electrodes connected with positive and negative poles of the high-voltage pulse power supply, the electrodes are installed on the front and rear walls, side walls and the bottom of the processing chamber, the temperature control unit is installed in the processing chamber and connected with the control unit, the water feeding and discharging unit comprises a water feeding pipe and a water discharging pipe, and both of the water feeding pipe and the water discharging pipe are communicated with the processing chamber for automatically replacing water. During use of the food detoxification machine, food to be processed is placed in the food detoxification machine, the high-voltage pulse power supply is started, and a high-voltage pulse electric field is generated between each pair of electrodes to perform detoxification on food.
Owner:XINJIANG KANGYOU FOOD SCI & TECH

Detoxification method of cottonseed cake or cotton seed meal

The invention discloses a detoxification method of cottonseed cake or cotton seed meal, which is a method for grinding and detoxifying the cottonseed cake or the cotton seed meal containing free gossypol in a high-energy grinder under the effect of the grinding auxiliary agent, and comprises the following steps that: 1) the cottonseed cake or the cotton seed meal containing the free gossypol is measured, and then the grinding auxiliary agent with the weight being 1 to 10 percent of that of the cottonseed cake or the cotton seed meal is measured to be uniformly mixed with the cottonseed cake or the cotton seed meal; 2) the above mixture is added into the high-energy grinder to be ground for 5 to 60 minutes so as to obtain the detoxified cottonseed cake or the detoxified cotton seed meal. The method overcomes the weaknesses of the traditional physical and chemical detoxification technology that the high temperature and high-moisture treatment is required, and the energy consumption is high, has simple process, less equipment investment, convenient operation, high detoxification efficiency, is free from three wastes during the production process, and is applicable to the large-scale industry. The prepared detoxified cottonseed cake or the detoxified cotton seed meal has good palatability, high digestibility and low content of anti-nutrition factor.
Owner:ZHEJIANG UNIV

Detoxification method for excised stem segment of grape

The invention relates to a detoxification method for an excised stem segment of grape. The method comprises the following steps: 1) selecting a grape variety and a test-tube plantlet related to parental stock, wherein the grape variety is subjected to a secondary culture until a stem is semi lignified; under a sterile condition, clipping a single bud stem segment and inoculating in a culture media, followed by placing in a 2000-3000 lx culture room having a temperature of 22-28 DEG C until a white rootlet is exposed to obtain a excised stem segment of the grape; 2) placing the excised stem segment of the grape in a incubator having a temperature of 35-40 DEG C, followed by carrying out a dark treatment while carrying out a heat treatment; 3) observing a growth condition of the lateral bud after heat treating for 10 days, visual peeling 0.2-0.8 mm of the micro stem apex under a sterile condition when a length of the yellow young shoot is 6-10 cm, then placing the micro stem apex in the culture media to obtain the propagation material. According to the present invention, illumination and frequent temperature change process do not require, such that the method has characteristics of simple operation, time saving, electricity saving, labor saving, high efficiency and low cost. In addition, the method has not strict requirements on research environments and research conditions and facilities, such that the method can be applicable for the research and teaching unit with the tissue culture condition.
Owner:CHANGLI INST OF POMOLOGY HEBEI ACADEMY OF AGRI & FORESTRY SCI

Detoxification method of chromium-containing slag entering metallurgical blast furnace by using coal spraying process form

The invention provides a detoxification method of chromium-containing slag entering metallurgical blast furnace by using coal spraying process form. The method comprises the following steps: first drying and grinding the chromium-containing slag, then uniformly blending chromium-containing slag in an amount of 1 to 15 percent of the weight of coal powder into the coal powder, spraying the coal powder blended with the chromium-containing slag into a blast furnace cylinder from a blast furnace coal-spraying system, detoxifying the hexavalent chromium in the chromium-containing slag at the high temperature of the blast furnace under the reducing atmosphere, reducing the hexavalent chromium into trivalent chromium, and finally reducing the trivalent chromium into a chromium metal, wherein 92 to 98 percent of the chromium metal is melted into molten iron and 2 to 8 percent of the chromium metal enters the furnace slag; and meanwhile, reducing the iron oxide in the chromium-containing slag into iron metal for entering the molten iron. By utilizing the sealed blast furnace coal-spraying system to directly spray the chromium-containing slag into the blast furnace cylinder, the method has the advantages of few links, no pollution, thorough detoxification due to direct and full utilization of the high-temperature reducing atmosphere, full recycling and lowest cost compared with that of the conventional methods for treating chromium-containing slag.
Owner:CHONGQING ANGRUIYUE SCI & TECH

Detoxification method of wood fiber hydrolyzed sugar liquid

The invention discloses a detoxification method of wood fiber hydrolyzed sugar liquid. Organic modified bentonite is used as an adsorbent to adsorb and remove a hydrophobic inhibitor in the wood fiber hydrolyzed sugar liquid, wherein the organic modified bentonite is the bentonite which is subjected to modification treatment of a cation surfactant and has a hydrophobic property. According to the detoxification method, the organic modified bentonite is used for carrying out adsorption treatment on the wood fiber hydrolyzed sugar liquid so that a fermentation inhibitor is removed without adsorbing a fermentable sugar; particularly, the content of hydroxymethyl furfural and phenols inhibitors is greatly reduced and the coordinate repression effect of the fermentation inhibitor on the growth and the fermentation of microorganisms is reduced, so that the fermentable performance of the wood fiber hydrolyzed sugar liquid is improved; compared with the wood fiber hydrolyzed sugar liquid which is not subjected to the adsorption treatment, the utilization speed of the microorganisms to the wood fiber hydrolyzed sugar liquid is greatly improved and the fermentation period is shortened; and therefore, the invention provides a new way for the detoxification of the wood fiber hydrolyzed sugar liquid.
Owner:NANJING FORESTRY UNIV

Biological detoxification method and detoxification active bacterial strain of hemicellulose hydrolysate

The invention discloses a method for degrading and removing microbial metabolism inhibitors existing in a hemicellulose diluted acid hydrolysate by using a detoxification active bacterial strain. The detoxification active bacterial strain comprises issatchenkia orientalis CCTCC NO:M 206098 and issatchenkia occidentalis CCTCC NO:M 203097, and both the ssatchenkia orientalis and the issatchenkia occidentalis can degrade the microbial metabolism inhibitors which comprise acetic acid, furfural and phenols substances and exist in the hemicellulose hydrolysate and have the characteristics of low pH value resistance and no utilization of pentose or sugar alcohol thereof. The detoxification active bacterial strain can be used for carrying out single bacterial detoxification treatment on the hemicellulose hydrolysate and can also generate xylitol or alcohol with fermented xylose for bacterial strain mixing and inoculating to the hemicellulose hydrolysate to carry out synchronous detoxification and fermentation. The biological detoxification method can effectively improve the fermenting property of the hemicellulose hydrolysate and improve the yield of fermentation products of the alcohol and the xylitol and has the advantages of environmental protection and energy saving.
Owner:唐传生物科技(厦门)有限公司

Sectional type gasification and detoxification system and method for high-concentration organic salt-containing waste liquid

The invention discloses a sectional type gasification and detoxification system for high-concentration organic salt-containing waste liquid, belonging to the technical field of waste recycling. The sectional type gasification and detoxification system comprises a drum type spray preconcentrator and a disk gasifying machine, wherein an inner drum of the drum type spray preconcentrator and a disk of the disk gasifying machine respectively has a hollow structure, and waste liquid is preconcentrated to form salt slag and enter the disk gasifying machine for gasification and detoxification, thus finally forming crystalized salt product. The invention further discloses a sectional type gasification and detoxification method of high-concentration organic salt-containing waste liquid. The system and the method utilizes an organic matter high-temperature (350-560DEG C) principle, the thorough separation of organic matters from salts in the high-concentration organic salt-containing waste liquid in the drum type spray preconcentrator and disk gasifying machine under inert atmosphere, the formed crystalized salt can be used as industrial salt raw materials, and organic vapor is returned back to incinerator for incineration; and the sectional type gasification and detoxification system can be embedded into a dangerous waste incineration system, so that the treatment cost of the high-concentration organic salt-containing waste liquid can be effectively lowered, and the problem that the crystalized salt is stained with pollutant in smoke can be avoided.
Owner:JIANGSU PROVINCIAL ACAD OF ENVIRONMENTAL SCI
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