198results about How to "To achieve the purpose of treating waste with waste" patented technology

The invention provides a method for jointly repairing heavy metal contaminated soil at mining areas through a microorganism-chemical method. According to the method, a method that sulfate-reducing bacteria are adopted to reduce sulfate is adopted to generate hydrogen sulfide which is regarded as a precipitating agent of heavy metal; the heavy metal in soil is transferred into a liquid phase by adopting a surfactant chemical leaching method, sulfate-reducing bacteria liquid is added into soil and the leacheate respectively to transfer residual heavy metal in soil into a stable state from an exchangeable state, so that the purpose of effectively treating heavy metal contaminated soil at the mining areas is achieved. The treatment method provided by invention is low in cost, the process is convenient and simple, and easy to operate and control, the environmental pollution is less, the treatment effect is good, and the method has a wide industrial application prospect.

A treating method of waste cathode charcoal blocks is provided. The waste cathode charcoal blocks are from electrolytic tank heavy maintenance slag of an electrolytic aluminium factory. The method includes treating the electrolytic tank heavy maintenance slag to obtain powdered waste cathode charcoal blocks, subjecting the powdered waste cathode charcoal blocks to water leaching to obtain a leachate and cathode charcoal blocks after leaching, performing solid liquid separation after the leachate and a fluorine removal agent are subjected to a curing reaction, returning the filtrate to the leaching step for circulated use, and stacking filter cakes or adopting the filter cakes as a raw material for preparing calcium fluoride. The method adopts a manner of a plurality of times of leaching, thus achieving innocent treatment of the waste cathode charcoal blocks. The filtrate and the filter cakes after leachate treatment can be reused, and the cathode charcoal blocks after leaching can be adopted as fuel for producing alumina. The method overcomes a series of problems caused by stacking of a large amount of the waste cathode charcoal blocks, achieves efficient utilization of the waste cathode charcoal blocks, and is obvious in economic benefit and suitable for industrial production.

The invention belongs to a treatment method of solid waste in environmental engineering, and particularly relates to a method for curing lake dredged sediment containing heavy metal. The method is characterized by comprising the steps of adding a curing agent prepared from waste gypsum, coal ash and cement in a mixing manner to lake dredged sediment containing heavy metal, evenly stirring, and covering a plastic film on the surface for molding for 1-3 days; and maintaining for 2-10 days under the conditions that the temperature is 20+/-(3-6) DEG C and the relative humidity is 70-100% to obtain a solidified clod of which the unconfined compression strength is greater than or equal to 170.6kpa, wherein the weight ratio of the waste gypsum to the coal ash to the cement is 1 to (0.5-10) to (1-15); and the adding amount of the curing agent is 3-20% of mass of the lake dredged sediment containing the heavy metal. Industrial wastes such as the coal ash, the waste gypsum and the like are taken as curing agent materials of heavy metal polluted sediment; and resource utilization of the wastes such as the polluted sediment, the coal ash and the waste gypsum is achieved, so as to achieve the target of treatment of wastes with processes of wastes against one another.

The invention belongs to the technical field of nitrobenzene wastewater, in particular relates to a method and device for adsorbing, reducing, oxidizing and degrading nitrobenzene wastewater, and solves the problem of the existing method for degrading nitrobenzene wastewater. The method comprises the following steps of performing a reduction reaction on nitrobenzene wastewater in a micro-electrolysis bath; performing a sufficient contact reaction with ozone in gas-liquid reaction equipment; further degrading pollutants in the wastewater in the gas-liquid reaction equipment; and circularly treating the wastewater in the micro-electrolysis bath and the gas-liquid reaction equipment. The device comprises a rotary packed bed device, wherein a gas inlet is connected with an ozone generator; and a liquid inlet and a liquid outlet are connected with the micro-electrolysis bath. The method and the device have the beneficial effects that the process flow is simple and convenient to operate; the advantages of various technologies are given a full play by coupling the three technologies to reach the aim of treating waste by using waste, so that the treatment cost can be furthest reduced.

The invention provides a method for preparing calcium sulfate crystal whisker with industrial waste acid and ardealite, which comprises the following steps: mixing ardealite and industrial waste acid, adjusting pH of the solution with ammonia water, and then stirring; immediately filtering the solution, cooling the filtrate, all crystal being separated out, and performing conventional stabilizing process on the surface of the crystal; and then drying, and obtaining calcium sulfate crystal whisker. The diameter of the obtained calcium sulfate crystal whisker is 1-4mum, the length is 50-200mum, the moh's hardness is 3-4, the tensile strength is 20.5Gpa, the elastic modulus is 178GPa, and the refractive index is 1.585. With the invention, industrial waste acid and solid waste ardealite can be utilized, the waste product of the two kinds of industries can be utilized, so the goal of treatment of wastes with processes of wastes against one another can be achieved; exploitation of natural gypsum can be reduced, resource can be saved, and meanwhile the production cost of calcium sulfate crystal whisker can be reduced; and the limit on the ingredients of the raw material ardealite and industrial waste acid is not strict, the application range is wide, the condition is wide, and the process is simpler.

The invention belongs to the technical field of material preparation and particularly relates to a method for preparing a titanium dioxide loaded biomass carbon aerogel material. According to the method, natural plant tissue such as watermelon peels serves as a raw material, and biomass carbon aerogel is prepared by a hydrothermal method in combination with a freeze-drying technique. The titanium dioxide loaded biomass carbon aerogel composite material is prepared through uniformly stirring titanium sulfate and the biomass carbon aerogel in distilled water and then carrying out a hydrothermal reaction. The diameter of the titanium dioxide loaded biomass carbon aerogel material prepared according to the method disclosed by the invention is 0.7 to 0.9 micron. The method has the following advantages that natural wastes serve as the raw material, so that the cost is low, and the efficient resource utilization of the wastes is achieved; and the preparation process is simple, the operation is simple and convenient, the requirements on environment-friendliness are met, and the wastes are treated with the wastes, so that mass production is facilitated.

The invention discloses a steel slag-desulfurized gypsum based soil solidification agent applicable to arsenic contaminated soil. The soil solidification agent contains the ingredients in percentage by weight: 40% to 45% of steel slag, 15% to 25% of desulfurized gypsum, 22% to 30% of slag, 7% to 10% of cement clinker and 3% of excitant. According to the soil solidification agent disclosed by the invention, arsenic is solidified and stabilized mainly by means of chemical wrapping and in-phase replaced solidifying, and the age of a solidifying reaction can be shortened and the mixed amount of the solidification agent and solidified volume increase ratio in engineering applications can be lowered while a solidifying effect is guaranteed, so that the solidifying efficiency is increased greatly.

The invention provides a method for preparing a ceramicadsorption material by using fly ash. The method comprises the steps that 1, fly ash and a pore forming agent are weighed and are mixed evenly; 2, caustic soda flakes and water glass are weighed, mixed and stirred till the caustic soda flakes are completely dissolved, and cooling is performed to obtain analkaliactivator; 3, the alkaliactivator is added while the powder in the step 1 is stirred, and semi-dried mixed powder is obtained after even mixing; 4, a proper amount of aqueous surfactant solution is added to the semi-dried mixed powder obtained in the step 3, and a sample is obtained through forming in a granulation or pouring mode; 5, the formed sample is subjected to wet maintenance for 12-24 hours, and the maintained sample is dried and calcined to prepare the ceramicadsorption material. The method utilizes the fly ash as a main raw material to prepare the geopolymerporous adsorption material, the pollution problem of the fly ash can be effectively relieved, and the problems of complicated preparation process, alkali waste production, high price, high temperature non-resistance, difficult industrial production and the like of the adsorption material can be also solved.

The invention provides a preparation method of high-temperature calcium-based CO2 absorbing material. The method includes: milling red mud and egg shell in a ball mill, screening, acid-leaching ground red mud and citric acid solution at the same temperature of 20-60 DEG C, mixing the acid-leached red mud and egg shell, adding water to mill the mixture, mixing well, and drying to obtain the high-temperature calcium-based CO2 absorbing material. The preparation method has the advantages that the cost of raw materials is low, the preparation process is simple, the material can absorb CO2 at high temperature directly so that carbon resource is recovered, the preparation method is easy for industrial production and treating waste with waste is achieved.

The invention relates to a preparation method and application of modified zeolite. The preparation method includes: adding a surfactant into deionized water to obtain an organic modified solution, with the surfactant and deionized water being in a mass ratio of 1:3-1:6; adding zeolite into the organic modified solution, with the surfactant and zeolite being in a mass ratio of 1:10-1:60, mixing the substances uniformly, then carrying out concussion reaction for 20-32h, performing filtering and low temperature drying, thus obtaining an organic modified zeolite product. Also, inorganic metal salt titanium sulfate can be added to conduct further compound modification. The composite modified zeolite prepared by the method provided by the invention shows good adsorption capacity to both copper ions and dye solutions.

The invention relates to a treatment method of polymer flooding oil production sewerage, comprising the following steps: fully contacting a catalytic cracking waste catalyst and the oil production sewerage containing HPAM, and enabling the dead catalyst to absorb organisms in sewerage; and heating and regenerating the catalytic cracking dead catalyst reaching adsorption saturation to recover for sewage treatment. The method of the invention is especially suitable for treating the oil production sewerage containing the HPAM.

The invention discloses a method for processing coal mine acid wastewater through sulfate reducing bacteria and spontaneous combustion coal gangue in a synergetic manner. The method includes the following steps that bottom mud in an oxygen-deficient or locally-oxygen-deficient environment is taken and inoculated in an enrichment culture solution, after the bottom mud is subjected to oscillation culture at the temperature being 32 DEG C at the speed being 150 r/min for 2 weeks, a culture medium becomes black, a bottle opening has the smell of rotten eggs, and a liquid culture medium containing SRB is obtained; the spontaneous combustion coal gangue with the grain size ranging from 30 mesh to 120 mesh is taken and rinsed with distilled water three times, the spontaneous combustion coal gangue is dried at the temperature being 60 DEG C for standby application after surface dust is removed; the liquid culture medium containing the SRB and the spontaneous combustion coal gangue are placed in a reactor in proportion and are placed in a biochemical incubator with the temperature being 32 DEG C to be cultivated for 1 week after being mixed, and implantation growth of the SRB is achieved; and the coal mine acid wastewater containing Fe2+ and Mn2+ is injected, and purification treatment of the wastewater is conducted. The coal mine acid wastewater containing the Fe2+ and the Mn2+ is treated through the sulfate reducing bacteria and the spontaneous combustion coal gangue in the synergetic manner, waste in mining areas and microorganisms are combined and used for solving the problem of coal mine acid wastewater pollution, and the aim of treating waste through waste is achieved.

The invention relates to a method for preparing a cellulose based dye waste water purification material with waste newspaper, which solves the problems that in the prior art, the existing waste newspaper recycle rate is low, the absorption efficiency of the dye waste water purification material is low, and the process effect of the purification material is not prominent. The method comprises the following steps: mixing and stirring the waste newspaper, Na2Si3 9H2O, H2O2, NaOH and a surfactant to obtain deinked cellulose; washing, drying, crushing and screening the cellulose to obtain waste newspaper fiber; adding a NaOH solution into the waste newspaper fiber, stirring the mixture and filtering out half of the NaOH solution, adding epoxy chloropropane into the remain solution, stirring the solution, filtering out the water, and cleaning the fiber; adding tetramethyl ethylene diamine into the fiber, stirring and filtering the mixture, and cleaning the fiber; adding methyl carbonate into the fiber, stirring and filtering the mixture, and finally cleaning and drying the fiber. The waste newspaper is changed into an environment-friendly cellulose adsorbent which is conducive to environmental protection; the anionic dye solution adsorption efficiency is high, the adsorption capacity is also high, and the absorption effect is obvious.

The invention relates to a method for municipal sludge in-situ detwatering by utilization of Fenton sludge. Sludge is subjected to press filtration and dewatering in a sewage treatment plant, then sulfuric acid is added, activation is carried out, thus iron elements with an ionic state exist in the sludge, plastic drain boards are put into municipal sludge, dewatering pre-treatment is carried out, water is drained through a conventional vacuum precompressed drainage method, the Fenton sludge after activation of sulfuric acid is added in the municipal sludge after pre-treatment, the mixture is stirred uniformly, quicklime is added, stirring is carried out, thus the sludge and calcium oxide are mixed uniformly and rapidly, pH adjustment, deodorizing and disinfection are carried out, and the purposes of deep dewatering and stabilization are achieved. The provided method overcomes the detect of high operation and disposal costs of previous sludge processing. The sludge containing a lot of iron elements as a product of the Fenton oxidation method is employed as a coagulant for municipal sludge solidified treatment, the sludge after activation contains a lot of Fe<3+> irons, the ferric salt with a high valence can be employed as a leaching agent, heavy metal ions in the sludge can be leached, and the sludge is discharged.

The invention discloses a method for resource treatment of phosphatized sludge, and belongs to the field of solid waste resource utilization. The method is characterized in that for the problem of limitation to the resource utilization of the phosphatized sludge by the heavy metal impurities in the phosphatized sludge, the acid extraction and physical-chemical treatment type is adopted, so as to realize the resource utilization of the phosphatized sludge. The method has the advantages that by using waste phosphate to perform acid extraction, while the phosphatized sludge is utilized in a resource way, the waste acid is also treated, so as to greatly reduce the operation and treatment cost of the technology, realize the new concept of using wastes to treat wastes, and effectively combine the waste treatment and the resource utilization; the economic benefit and environment benefit are good, and the method is suitable for being popularized and used.

The invention provides a preparation method of a red mud-slag-cement composite dephosphorization agent, comprising the steps of drying the materials of red mud, slag and cement, crushing, screening, drying to constant weights, and mixing well in a certain ratio; mixing the mixture with deionized water to obtain raw particles; subjecting the raw particles to microwave activation, and cooling to room temperature to obtain the red mud-slag-cement composite dephosphorization agent. All the red mud, slag and cement have high calcium oxide content; phosphates in water are removed in calcium phosphate form via calcium-based components; iron oxide in the red mud and slag are heated quickly under the action of microwave, so that calcining is achieved; hydrated minerals, carbonate minerals and the like in the red mud and slag decompose easily and easily release water or gas, and pore structures are formed in the particles; the slag has incompletely combusted ash in a certain ratio, and pore forming can also be achieved in the microwave activation process.