130results about How to "Rapid solid-liquid separation" patented technology

The invention discloses magnetic composite hydroxyapatite nanoparticles. The magnetic composite hydroxyapatite nanoparticles are composed of Fe3O4 nanoparticles and hydroxyapatite nanoparticles, wherein the molar ratio of the Fe3O4 to the hydroxyapatite is (1-10): 1; the magnetic composite hydroxyapatite nanoparticles are spherical aggregate or agglomerate in which the Fe3O4 nanoparticles and the hydroxyapatite nanoparticles are distributed evenly and alternately. The preparation method of the magnetic composite hydroxyapatite nanoparticles is simple; the nanoparticles are capable of efficiently removing heavy metal ions in sewage, and in the later treatment period, quick magnetic separation can be realized; the nanoparticles have the adsorbing capacity of 440mg/g to lead ions, the adsorbing capacity of 238mg/g to cadmium ions, the adsorbing capacity of 139mg/g to zinc ions and the adsorbing capacity of 135mg/g to copper ions in the sewage; the magnetic composite hydroxyapatite nanoparticles have a rapid magnetic response characteristic, and are capable of realizing rapid solid-liquid separation with an external magnetic field, and the separation process is high in separation efficiency, and simple and efficient to operate; and besides, the nanoparticles are not residual in water and do not cause secondary pollution to the water and the environment.

The invention provides a compound water treatment agent and a preparation method and an application of the water treatment agent. The compound water treatment agent comprises the following components in parts by weight: 48-70 parts of sodium bentonite, 8-15 parts of kieselguhr, 8-15 parts of zeolite, 6-10 parts of magnetic substance, 5-7 parts of chitosan and 3-5 parts of polyacrylamide. The preparation method of the compound water treatment agent is simple, and a material source is wide. With the adoption of the compound water treatment agent, heavy metal ions and organic contaminants in water can be removed while electrolyte concentration in the water can be lowered, and solid-liquid separation can be conducted quickly by virtue of a magnetic filter method. The compound water treatment agent can be applied to a pre-treatment process of a reverse osmosis system, facilitates increasing the water production rate of the reverse osmosis system, reduces operating pressure of the reverse osmosis system, and is significant in practical value and broad in market prospect.

The invention provides a method of biologically making restaurant and kitchen rubbishes into feed, including: solid-liquid separation and oil-water separation. The oil separated out is made into fatty acid calcium particles by emulsifying and hydrogenating. The water separated out is added to feed saccharomycetes to obtain a saccharomycetes-containing solution. The solid separated out is sterilized at high pressure and then mixes with the solution to ferment into the feed. The method is special, the process is novel, and the final product is economic and practical. It converts the restaurant and kitchen rubbishes to the feed that has high-added value fatty acid calcium and high protein. The whole course does not discharge any pollutant and has no secondary pollution. The feed obtained contains various physiological active substances, helpful for the domestic animals and fowls to digest and assimilate the feed, thus increasing the utilization rate of the feed.

The invention discloses an acidic iron-containing wastewater recycling system comprising a pickling wastewater storage pool, wherein the pickling wastewater storage pool is connected with a neutral oxidation reaction tank through a raw water acid proof pump, and a stirrer, a 1# online pH meter and a 1# online ORP (oxidation reduction potential) meter are fixed in the neutral oxidation reaction tank; an alkali liquor storage tank is connected with the neutral oxidation reaction tank through a 1# metering pump; a flocculant storage tank is connected with the neutral oxidation reaction tank through a 2# metering pump; the neutral oxidation reaction tank is connected with a settling tank through a slurry pump, the settling tank is connected with a sludge concentration tank, and a supernatant drain pipe is further connected to the settling tank; the sludge concentration tank is connected with a high pressure plate frame filter press through a high pressure slurry pump; and the neutral oxidation reaction tank is further connected with a blower. The invention further discloses an in situ modification method for treating wastewater by the acidic iron-containing wastewater recycling system. By adopting the acidic iron-containing wastewater recycling system disclosed by the invention, more than 55% of Fe3O4 can be stably prepared and recycled through in-situ reaction in an acidic wastewater neutralization tank under normal temperature and normal pressure conditions.

The invention discloses a preparation method and application of a magnetic covalent organic framework compound for adsorbing triphenylmethane dyes. The invention belongs to the field of preparation ofmagnetic covalent organic framework compounds. The invention aims to solve the technical problems of complex operation and long reaction time of the existing method for synthesizing the covalent organic frameworks (COFs). The method comprises the following steps of: 1) preparing carboxylated magnetic nano (Fe3O4-COOH); and 2) synthesizing a magnetic covalent organic framework (Fe3O4-COOH(at)COF)on the surface of the magnetic nano material through a Schiff base reaction. The preparation method is simple, the synthesis time is short, and the synthesis only takes 3 hours at high temperature of120 DEG C. The prepared Fe3O4-COOH (at) COF has magnetic responsiveness, high specific surface area, high thermal stability and high adsorption performance (42.8 mg/g-500mg/g). According to the method, the triphenylmethane cationic dyes can be rapidly extracted from a complex sample within 10 minutes, so that multi-residue detection of the triphenylmethane cationic dyes can be realized, the pretreatment process of the complex sample is simplified, and the separation efficiency is greatly improved.

The invention provides a livestock and poultry breeding solid-liquid separation excrement cleaning device. The livestock and poultry breeding solid-liquid separation excrement cleaning device comprises an annular excrement collecting box; an excrement scraping plate is installed in the annular excrement collecting box; the excrement scraping plate is directly connected with a power driving mechanism or is connected with the power driving mechanism through a connecting piece; the excrement scraping plate is driven by the power driving mechanism to rotate around the annular excrement collecting box; the bottom plate of the annular excrement collecting box is an inclined plate; the lowest point of the inclined plate is located at the middle of the bottom plate; an urine discharging opening is formed at the middle of the bottom plate; and a solid excrement outlet is formed at the bottom plate of the annular excrement collecting box. According to the livestock and poultry breeding solid-liquid separation excrement cleaning device of the invention, after excrement falls into the annular excrement collecting box, solid-liquid separation of the excrement can be realized; solid excrement and liquid excrement are separately collected through different pipelines; the solid excrement is directly treated and is packaged; and the liquid can be adopted as secondary water after being purified; and therefore, excrement treatment procedures can be decreased, and treatment cost can be decreased, and underground space can be greatly saved. The livestock and poultry breeding solid-liquid separation excrement cleaning device of the invention is reasonable in integral design. The driving mechanism is arranged on the excrement scraping plate. The livestock and poultry breeding solid-liquid separation excrement cleaning device is especially suitable for annular comprehensive cultivation buildings and can realize fast and convenient solid-liquid separation treatment.

The invention discloses a combined leaching-stabilization rehabilitation method for soil contaminated by chromium residue. The method specifically comprises the following steps: remediation preparation, specifically, a leachate guide drainage structure is constructed, and the soil contaminated by the chromium residue is dredged, transported, broken, screened and piled; leaching remediation, specifically, a leaching agent is evenly distributed on the surface of a soil heap, the leaching agent separates chromium contaminants in the soil from top to bottom, a discharge port of the leachate is opened and the leachate is collected to a detoxification tank, hexavalent chromium is reduced and trivalent chromium is precipitated, and supernatant is used for circulating spray; and stabilization rehabilitation, specifically, the discharge port of the leachate is closed, stabilizer solution is added to a leaching tank until the soil is submerged, and the chromium contaminants remaining in the stabilized soil are soaked and stabilized by the stabilizer. By means of the combined leaching-stabilization rehabilitation method for the soil contaminated by the chromium residue, the leaching process and the stabilization process are organically combined, first, the total amount of the contaminants in the soil contaminated by chromium residue is reduced by spraying the leaching agent, and then theresidual contaminants are further removed by soaking the stabilizer, so that the amount of stabilizer addition is greatly reduced, and the environmental risk of the soil contaminated by the chromium residue is effectively eliminated.

The invention relates to a pressurization rotating drum filtering machine, which comprises a base and bearing seats, wherein a case consists of connecting flanges arranged at two ends and separation plates arranged in the middle, the separation plate is distributed in the circumference direction and forms a frame chamber with the connecting flanges arranged at two ends, the bearing seat is arranged at two ends of the case, the other side of the bearing seat is provided with a speed reducing gear, the inner side of the bearing seat is provided with a bearing, the speed reducing gear, the bearing and the bearing seat are respectively arranged on a left shaft joint, a sealing ring A is arranged between the left shaft joint and the case, a press ring is arranged between the left shaft joint and the bearing seat, the inner side of the case is provided with a sealing press plate, the other side of the sealing press plate is provided with an annular rib, the two sides of the annular rib are provided with filter cloth, one side of the filter cloth is provided with a sealing press plate, the other side of the filter cloth is provided with a filtering plate, and the other side of the filtering plate is provided with a base plate. The pressurization rotating drum filtering machine can be used for fast carrying out solid-liquid separation on various kinds of suspension materials, the continuous material discharge is realized, the processing quantity is great, the dewatering effect is good, and the operation environment is good.

The invention discloses a preparing method of a cesium ion adsorbing agent. The preparing method comprises the steps that firstly, carboxyl ferroferric oxide is prepared; secondly, carboxyl ferroferric oxide and a condensing agent are mixed, and a first mixture is obtained; thirdly, the first mixture is put into a solvent and stirred, an amination crown ether derivative is then added into the solvent, a reaction is carried out at the temperature ranging from 60 DEG C to 80 DEG C for at least 2 hours, and a second mixture is obtained, wherein the solvent is used for dissolving the amination crown ether derivative and the condensing agent; fourthly, the second mixture is subjected to solid and liquid separation, a first solid phase is obtained, cleaned and dried, and the cesium ion adsorbing agent is obtained. The invention further discloses the cesium ion adsorbing agent prepared through the method. The cesium ion adsorbing agent has high cesium ion adsorption selectivity and magnetism, and stable adsorption performance is maintained in the recycle use of adsorption and desorption. The cesium ion adsorbing agent can be applied to adsorption separation of cesium ions form radioactive nuclear waste, a polyion competing system and the like.

The invention discloses a method for extracting and purifying polyglutamic acid by adjusting the pH value to carry out fractional precipitation in the presence of ammonium sulfate. The method comprises the following steps: adding 30-60% (W/V) of ammonium sulfate into a fermentation liquid containing polyglutamic acid, adjusting the pH value to 6.0-8.0, removing the precipitate after stirring, andcollecting the glutamic acid clear solution; adjusting the pH value of the polyglutamic acid clear solution to be acidic, and collecting the glutamic acid precipitate; then re-dissolving the polyglutamic acid precipitate with water, adjusting the pH value to be alkalescent by using an alkali, carrying out ultrafiltration until conductivity of the permeate liquid is smaller than 5 ms*cm, and collecting the retained liquid; and adding activated carbon into the retained liquid for decolorization to obtain a colorless clear liquid, and carrying out drying to obtain a white polyglutamic acid solid.According to the method, polyglutamic acid can be effectively separated with other impurities, and use of organic solvents such as ethanol and the like is avoided. The purity of the obtained polyglutamic acid is high, and production cost is effectively reduced.

The invention discloses a preparation method and application of a core-shell magnetic gamma-cyclodextrin polymer composite material. The composite material is composed of multiple layers of polydopamine (PDA) and cyclodextrin polymer (P-CDP) coating each other, wherein each P-CDP layer has a thickness of about 20 nm. The composite material disclosed by the invention uses PDA as a binder, and the cyclodextrin polymer can uniformly coat magnetic balls under the condition of water-bath heating and continuous stirring. Compared with a simple cyclodextrin polymer material, the composite material has magnetic property to make the solid-liquid separation simpler and faster, and has more adsorption sites through the uniform coating of the cyclodextrin polymer. The preparation process is simple, and the composite material has good separation and enrichment effect on microcystins, and has good application prospects in the fields of water environment analysis and aquaculture risk warning.

The invention discloses a method for treating pharmaceutical wastewater through a nanometer Fe3O4 Fenton-like technology, relates to a method for treating the pharmaceutical wastewater and aims to solve the problems that at present, pharmaceutical wastewater biochemical effluent COD can not reach the standard and is hard to remove further, and when an existing Fenton oxidation method and an existing Fenton-like method finish pH regulation through oxidation, the amount of produced iron mud is large, the coagulating sedimentation technology needs to be added. The method comprises the first step of regulating the pH value, the second step of adding nanometer Fe3O4 and hydrogen peroxide, the third step of stirring for reaction, and conducting magnetic separation on the pharmaceutical wastewater with the hydrogen peroxide through a direct-current electromagnet so that magnetically attracted nanometer Fe3O4 and liquid supernatant obtained after separation can be obtained, and the fourth step of regulating the pH value and conducting washing to obtain treated water and regenerated nanometer Fe3O4. The values of COD in the treated water are lower than 50 mg/L. The method is used for treating the pharmaceutical wastewater through the nanometer Fe3O4 Fenton-like technology.

The invention discloses an unpowered rural sewage treatment device which structurally comprises a sewage treatment device, a device body, a water outlet pipe, supporting feet, a control cabinet, a water inlet pipe, a control panel and a top cover. The bottom of the top cover is fixedly connected with the top of the device body; the back of the control cabinet is vertically connected with the frontside of the device body, and the side face of the control panel is inlaid in the front side of the control cabinet; the left end of the water inlet pipe is connected with the interior of the device body in a communicating manner; the bottom of the device body is vertically connected with the top of the water outlet pipe; the sewage treatment device is arranged in the device body, and the supporting feet are connected into a triangular structure successively to array at the device body; the sewage treatment device is composed of a water inlet device, a filter device, a linkage device, a circulating extrusion device, an adjustment device, a manual device and an oxygen supply device; the unpowered rural sewage treatment device can rapidly perform solid-liquid separation on sewage and also can perform compression treatment on a separated solid, so that compressed excrement can be fertilized and used, and water also can have the quality improved by increasing the oxygen content.

The invention discloses a method for comprehensively recycling valuable metal from copper nickel slag. The method comprises the following steps: leaching iron out of raw material copper nickel slag by a step-by-step concentration difference leaching method, carrying out flotation enrichment on the leaching slag to prepare copper cobalt nickel bulk concentrate; selectively extracting iron from the leaching liquid by an extraction method to prepare iron oxide red, or precipitating the leaching liquid to prepare refined iron powder and water glass. By the method, high-grade copper cobalt nickel bulk concentrate, powdered iron, high-purity iron oxide red, high-modular water glass and other products are prepared with low cost. The method is environment-friendly and easy to operate and can realize continuous industrial production.

The invention discloses a method for treating landfill leachate tail water through magnetic carbon catalyzed ozonation, which belongs to the technical field of treatment of environmental waste. The method comprises the following steps: (1) biological treatment of landfill leachate; (2) preparation of a magnetic carbon catalyst; (3) catalysis of ozone for oxidation treatment; etc. According to the invention, the magnetic carbon catalyst is added, and adsorption performance and catalytic characteristics of the catalyst are fully utilized; therefore, under the synergism of adsorption and catalyzed ozonation, effluent reaches national discharge standards that COD is no more than 100 mg/L and chroma is no more than 40 times, and through utilization of the magnetic characteristics of a magnetic carbon material, the problems of separation, recovery and reutilization of the catalyst are overcome. The method provided in the invention can be popularized and applied in in-depth treatment of household garbage leachate tail water in town regions.

The invention discloses a preparation method of a hydrocracking catalyst. The preparation method comprises the following steps: (1) pulping raw material powder of a hydrocracking catalyst carrier component, performing high-temperature and high-speed stirring treatment while pulping, filtering, and drying a filter cake, wherein the hydrocracking catalyst carrier component comprises a molecular sieve, and further comprises at least one of aluminum oxide, amorphous aluminium silicon, amorphous magnesium silicon and clay; (2) shaping the dried material, drying, roasting for activating, and preparing into a catalyst carrier; (3) loading a hydrogenating active component by an impregnation method to obtain the hydrocracking catalyst. Compared with the prior art, the preparation method of the hydrocracking catalyst has the advantage as follows: by the preparation method, a synergistic effect between different components can be further promoted, so that the using performance of the catalyst is improved.

The invention belongs to the technical field of sewage disposal, and particularly relates to a heavy metal chelating agent. The heavy metal chelating agent comprises, by weight, 5-15 parts of sodium silicate, 25-35 parts of organic sulfides, 5-15 parts of sodium hydrosulfide, 2-8 parts of sodium aluminate and 32-60 parts of water. The materials have strong ion-exchange capacity and carry out a synergistic effect to show gathering capacity on heavy metal ions; the sediment is carried out rapidly, and after sewage is disposed, the solid-liquid separation is rapid, simple and convenient; the preparation technology is simple, and the operation is easy. The heavy metal chelating agent can effectively react with heavy metal chemically to produce an insoluble substance, and the chelating agent can nearly absorb all kinds of the heavy metal.