36results about How to "To achieve the effect of resource utilization" patented technology

The invention relates to a method for preparing a cationic organic flocculant by using paper-making sludge. The method comprises the following steps: directly dissolving a raw material by using an alkali liquid, centrifuging to separate supernate, adjusting the pH value of the solution, putting into a reactor, heating till a certain temperature, adding potassium peroxydisulfate and ethylenediamine tetraacetic acid, introducing nitrogen, stirring to activate for certain time, further adding acrylamide and a dimethyl diallyl ammonium chloride solution to the reactor, continuously introducing nitrogen, stirring for reaction, subsequently pouring into acetone to separate out a reaction product, and drying the filter residue in vacuum, thereby obtaining a flocculant product. When the prepared flocculant is used for treating a simulation water sample, the addition amount is 2mg / l, the UV254 removal rate is about 85%, and the DOC removal rate is about 70%. The method is simple in process, low in equipment requirement and beneficial for industrial production and application, not only is reuse of paper-making wastes achieved, but also the prepared flocculant product is environment-friendly, free of toxicity and high in efficiency, and the water treatment cost can be lowered.

The invention relates to a method for preparing a dispersing-stabilizing agent by using papermaking sludge, which comprises directly dropping NaOH solution in raw materials which are not processed and adding anhydrous sodium sulfite to react for 1.5-2h when temperature rises to 90 DEG C; adding hydrogen peroxide, formaldehyde solution and the anhydrous sodium sulfite for reaction; and finally adding monochloro acetic acid to blend for 2-3h to obtain the dispersing-stabilizing agent containing sodium lignin sulfonate-sodium carboxymethylcellulose. Obtained products have good disperse stability and enable concentration of water-coal-slurry to achieve 67% when using in the water-coal-slurry, viscosity is below 1100mPa*s, no hard sediment is generated after the products are placed for 72h, and mobility is good. The method is simple in process and soft in reaction condition, achieves reutilization of waste, and is capable of being used in industries of water-coal-slurry preparation, oil fields, cement manufacture and the like.

The present invention is a method for efficiently recovering protein from excess sludge. The method comprises the following steps: adding excess sludge WAS into a reaction flask, adding APG in an amount of 0.1-0.5g / gSS, adjusting the initial The pH value is 4.0 to 11.0; after the reaction flask is driven by oxygen and nitrogen for 2-5min, the reaction flask is sealed, and the WAS is hydrolyzed by constant temperature shaking culture; after the pretreated WAS is centrifuged, the excess sludge WAS is completely precipitated , after taking the supernatant, then adding carrageenan to the supernatant, the mass ratio of protein and carrageenan obtained by WAS hydrolysis is 25-1:1, and the pH is adjusted to 1.0-3.0, and the temperature is 30-37 After shaking at ℃ for 15 min, the carrageenan, protein and acid were fully mixed; the mixed solution was centrifuged, and the lower precipitate was the recovered protein. The technology of the invention adopts the technology of combining the complex coagulation method and the acid-base precipitation method after hydrolysis, so that the protein can be recovered to the greatest extent through the combined action of the two.

The invention provides a PEC system for treating ammonia gas and generating electricity by photoelectrically activating persulfate through a transitional bimetallic oxidation composite catalytic material, which belongs to the technology of activating persulfate to purify gas phase pollutants and odorous ammonia gas and other air pollution waste resources. Take advantage of technical areas. The copper-cobalt double metal oxide composite is used as a photocathode for in-situ activation and sprayed on the composite to evaporate and concentrate persulfate to generate sulfate radicals with high oxidation potential. The anode is made of copper rods at K 2 SO 4 Corrosion is formed in the electrolyte solution, and a photoelectrocatalytic system is constructed to accelerate the removal rate of ammonia gas. CuO‑Co in electrocatalytic and photocatalytic systems 3 o 4 Catalytically activated persulfate membranes can not only efficiently remove ammonia, but also use the self-contained energy of ammonia to generate electricity, which provides an idea for the "advanced oxidation technology" based on persulfate activation in the field of air purification.

The invention relates to a method for recovering zirconia and yttria from the yttria-stabilized zirconia solid solution waste, which comprises the following steps: mixing the solid solution waste powder, sulfate and salt; acidizing and calcining at 200 to 320 DEG C; leaching the acidizing water and / or mother liquor under self-heating conditions; concentrating the leaching solution to leach zirconium sulfate; dissolving the zirconium sulfate in the water and purifying; neutralizing the zirconium hydroxide with alkali and precipitating; calcining the zirconium hydroxide to obtain zirconia; precipitating zirconium mother liquor to produce by-product of ammonium sulfate; neutralizing yttrium rich mother liquor and precipitating to obtain yttrium; dissolving yttrium rich residue with acid and purifying; precipitating oxalate to obtain yttrium oxalate; calcining to obtain the yttria. The method has the advantages of effectively separating the yttria from the zirconia in stable zirconia solid solution waste with optional yttrium ion under low temperature condition, changing the zirconia solid solution waste into valuables and utilizing the resources.

A VOCs adsorbent prepared by using mycelia solid waste resources and coal and its preparation method, which belong to the field of environmental protection, solid waste utilization and catalysis, can solve the problems of poor adsorption performance and short life of existing adsorbents. , long-flame coal, and semi-coal powder are mechanically mixed in proportion, and uniformly crushed with a sample making machine. The penicillin mycelium is acid-washed and activated, and after being matured, it is mechanically mixed with the above-mentioned coal powder, baking soda and cured starch, and mixed with water. After the mixture is granulated, it is carbonized and washed with water to obtain a high-performance VOCs adsorbent. The invention uses waste mycelium as the main raw material to prepare high-performance VOCs catalyst, which not only solves the problems of low catalyst activity and poor adsorption performance, but also realizes the comprehensive utilization of mycelium solid waste resources and reduces the impact of solid waste on the environment. destroy.

The invention relates to a compound flocculant with polymerization ferric chloride and amination polymers based on papermaking sludge and a method for preparing the compound flocculant. The method includes synthesizing amination polymers from the papermaking sludge generated in the papermaking industry; compounding the amination polymers and the inorganic flocculant polymerization ferric chloride to prepare the compound flocculant with the polymerization ferric chloride and the amination polymers based on the papermaking sludge. The compound flocculant and the method have the advantages that the color removal rate of disperse yellow water samples can reach 95% at least when the compound flocculant is used for treating the simulated dye water samples and the dosing quantity of the compound flocculant is 5 mg / L, excellent flocculation effects can be realized by the compound flocculant for water samples under different acidity and alkalinity conditions and other diversified water samples, the capital construction cost of reaction tanks and sedimentation tanks can be reduced, and the compound flocculant is high in electricity performance and flocculation efficiency, good in dissolving property, long in storage cycle and applicable to the field of water supply, wastewater treatment and the like and suitable for actual application to water treatment.