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126results about How to "Settling time is short" patented technology

Dephosphorization flocculating agent and preparation method thereof

The invention discloses a dephosphorization flocculating agent and a preparation method thereof. The dephosphorization flocculating agent is formed by compounding an inorganic flocculating agent and an organic flocculating agent. The raw materials of the inorganic flocculating agent comprise sodium ferrate, borax, ferrous sulfate, silicate or aluminate; the raw materials of the organic flocculating agent comprise modified chitosan or modified polyacrylamide. The preparation process comprises the following steps: firstly adding a non-oxidizing acid into the silicate or aluminate to obtain a polysilicate colloid or an aluminum hydroxide colloid, then adding a borax solution and a sodium ferrate solution sequentially while stirring, further dropping a ferrous sulfate solution, mixing to form the inorganic flocculating agent, standing, then adding the modified polyacrylamide or modified chitosan into the inorganic flocculating agent, curing and adding the acid till the pH value is less than 7 to obtain the finished dephosphorization flocculating agent. The flocculating agent is suitable for a wide range of water quality, is little affected by co-existing salts, the pH value of sewage and temperature and is particularly effective for dye wastewater, oilfield sewage and the like.
Owner:内蒙古昕晟科贸有限责任公司

Method for preparing polysilicate ferro-aluminum sulfate composite flocculant from red mud waste

The invention discloses a method for preparing a polysilicate ferro-aluminum sulfate composite flocculant from red mud waste. The method comprises the following steps: (1) putting red mud waste and anactivating agent into a muffle furnace to be roasted and grinding the red mud waste to obtain activated red mud powder; (2) putting an oxidizing agent and the activated red mud powder into a sulfuricacid solution to react; (3) adding adjusting salt to adjust a molar ratio of Fe to Al to Si in the solution as 1 to 1 to (0.2 to 0.7), utilizing a pH conditioning agent to adjust a pH of the solutionto 1 to 6; (4) adding a stabilizer to react and filtering to obtain the polysilicate ferro-aluminum sulfate composite flocculant. By means of the method disclosed by the invention, ferric oxide, aluminum oxide and silicon oxide in the red mud waste are effectively utilized to prepare the polysilicate ferro-aluminum sulfate composite flocculant; not only are the problems that the waste red mud occupies a lot of land and pollutes underground water are solved, but also the waste red mud can be resourcefully utilized, production cost is low, added value of products is high, and a novel way for comprehensively utilizing the red mud waste is provided.
Owner:SUN YAT SEN UNIV

Mineral complex sewage treating method

The invention relates to a mineral composite sewage treatment method. calcium based, sodium based or acidic bentonite is crushed into 101 to 600 mesh, other minerals are crushed into 60 to 600 mesh, the bentonite and other kinds of minerals form a mineral composite, the mineral composite is poured into sewage to be treated, and is blended, then 24% octadecyl trimethyl ammonium chloride is poured into the sewage and stirred, then a flocculating agent is poured into the sewage and stirred for subsiding, and then soil and water separation and micro-organism treatment are performed , and satisfying drainage standard can be reached; the weight ratio of the sewage and the added mineral composite is (1000:0.2)-(1000:2.5), the ratio of the dosage of the bentonite and the dosage of any another mineral is (1:1)-( 4:1), the dosage ratio of the mineral composite and the octadecyl trimethyl ammonium chloride is (2:1)-(17:1), and the dosage ratio of the mineral composite and the flocculating agent is (0.5:1)-(4:1). The method can be used for the treatment of toilets, printing and dyeing, coking, agricultural chemicals and galvanization sewage, and has the advantages of low treatment cost, wide application range and smaller sludge deposit, and has no influence on the subsequent microorganism treatment.
Owner:浙江华特新材料有限公司

Method for preparing polysilicate aluminum ferric chloride by using aluminum foil acid and ferrous acid

The invention relates to a method for preparing polysilicate aluminum ferric chloride by using aluminum foil acid and ferrous acid, in particular to a method for preparing the polysilicate aluminum ferric chloride by copolymerization of aluminum foil acid, iron and steel picking solution, aluminum slag and other industrial wastes as main raw materials as well as pentahydrate sodium silicate, and belongs to the technical field of recycling of aluminum foil acid and aluminum slag resources in the electronic aluminum foil industry. The object of the invention is to provide a method for preparing the polysilicate aluminum ferric chloride with high flocculability and stability by using the aluminum foil acid and other wastes. The polysilicate aluminum ferric chloride is finally prepared by ferrite oxidization, silicic acid activation, basification and polymerization and other processes; and a coagulant prepared by the method can be widely used for treatment such as dyeing wastewater, domestic sewage, industrial wastewater treatment, and has strong COD (Chemical Oxygen Demand) removal, decoloring and turbidity removal capabilities, the formed floc is large and dense, and the settlement time of the floc is short.
Owner:GUANGDONG HUAFENG NEW ENERGY TECH CO LTD +1

Method for preparing poly aluminum ferric silicate composite flocculating agent by using red mud and ferrous sulfate

The invention relates to a method for preparing a poly aluminum ferric silicate composite flocculating agent by using red mud and ferrous sulfate. The method comprises the following steps: fully mixing the red mud and the ferrous sulfate as well as alkali according to the weight ratio of 1:06-1.3:0.4-0.9, roasting and cooling a mixture at a temperature of 700-1000 DEG C; acid-pickling a cooled product and hydrochloric acid with a volume ratio of 1:1 according to the weight ratio of 1:4-25 at a temperature of 40-95 DEG C; and centrifugally separating an acid-pickled product and aging a filtrate to obtain the poly aluminum ferric silicate composite flocculating agent. The method has the benefits that the process flow is simple, the investment is less, and the operating expense is low; a synthesized product integrates the advantages of an aluminum flocculating agent and a ferric flocculating agent, and the stability and the water purification effect are good; and meanwhile, the invention provides a new approach for the utilization of the red mud as well as by-product ferrous sulfate for producing titanium dioxide, so that the resource utilization rate is improved, and the economic benefit, the environmental benefit and the social benefit are excellent.
Owner:CHINESE RES ACAD OF ENVIRONMENTAL SCI

Sewage treatment agent as well as preparation method and application thereof

The invention relates to a sewage treatment agent as well as a preparation method and application thereof. The sewage treatment agent is composed of magnesium oxide, zeolite, sulfate, an alkalizer and a high polymer coagulant. The sewage treatment agent disclosed by the invention, when used for treating sewage, can physically adsorb pollutants in water, in particular ultra-micro molecules, other components can perform differentiated treatment on other pollutants in the water and especially acid pollutants can be decomposed and converted completely, and by processing suspended materials through flocculation of sulfate and the like, harmful substances are cladded and such heavy metals as chromium are agglutinated under attractive and repulsive force between ultra-micro particles, so that the harmful substances are prevented from being dissolved; moreover, the sewage processing agent is large in flocculant granules, short in settling time and relatively low in sludge, and therefore thorough sewage treatment is realized; treatment rate can reach more than 95%; regenerated water source after treatment is free from harm, and the processed water not only can reach discharge standard but also bring about benefit for recycling; and the sewage processing agent is suitable for popularization and application in the fields related to domestic and industrial wastewater comprehensive treatment.
Owner:东莞市台腾环保材料科技有限公司

Industrial wastewater flocculating agent and preparation method thereof

The invention discloses an industrial wastewater flocculating agent and a preparation method thereof, belonging to the field of water treatment agents. The industrial wastewater flocculating agent comprises the following raw materials in parts by weight: 15-30 parts of polyacrylamide, 10-25 parts of polyacrylate, 3-9 parts of aluminum potassium sulfate, 5-10 parts of polysilicate, 3-9 parts of poly-aluminum calcium chloride, 5-10 parts of ferric chloride, 5-10 parts of gypsum, 10-25 parts of silica, 8-18 parts of zeolite, 3-9 parts of ferric citrate, 5-15 parts of polyphosphate ferric chloride, 1-5 parts of polymeric ferric sulfate and 50-90 parts of water. The industrial wastewater flocculating agent is short in flocculent precipitation time, good in effect and low in cost, is capable of improving the the emulsifying ability of water molecules and degrading harmful substances in water, particularly can be used for effectively treating high-concentration and high-turbidity wastewater and non-biochemical wastewater and can be widely applied to the treatment of municipal wastewater and various types of industrial wastewater as well as the water quality treatment of polluted rivers and lakes, and treated water can be circularly used.
Owner:GUILIN CHUNXIAO ENVIRONMENTAL PROTECTION TECH CO LTD

Method for producing polymeric aluminium ferric sulfate solution from industrial waste sulfuric acid generated during purification of acetylene gas and red mud

The invention discloses a method for producing a polymeric aluminium ferric sulfate solution from industrial waste sulfuric acid generated during purification of acetylene gas and red mud. The method comprises the following steps: adding water to the red mud to pulp the red mud, mixing the pulped red mud with waste sulfuric acid in a weight ratio of (2-5) to 1, stirring and mixing the materials to react for 1-4 hours to obtain a reaction mixture, standing to leach the mixture for 6-12 hours to obtain leachate, filtering the leachate to obtain filtrate, extracting rare metal impurities in the filtrate with di(isooctyl) phosphate, extracting organic matter impurities in a solution with an extracting agent and alkalifying and polymerizing raffinate to obtain the polymeric aluminium ferric sulfate solution with polymeric aluminium ferric sulfate mass content not less than 8% (in terms of aluminium ferric oxide). The method has the positive beneficial effects that the existing and potential environmental problems caused by discharge of the waste sulfuric acid after neutralizing treatment or direct discharge of the waste sulfuric acid and stacking and storage of the red mud on the land are solved; the polymeric aluminium ferric sulfate product capable of purifying sewage is produced from the waste sulfuric acid and the red mud, thus reducing environmental pollution caused by the waste sulfuric acid and the red mud; the process is simple and is easy to operate, so that the waste treatment cost is reduced; when serving as a flocculating agent, the prepared polymeric aluminium ferric sulfate product has the advantages of high settling time, large flocs, few metal residues and good sewage purifying effects.
Owner:河南开祥精细化工有限公司

Heavy metal wastewater treatment agent and preparation method of heavy metal wastewater treatment agent

The invention discloses a heavy metal wastewater treatment agent and a preparation method of the heavy metal wastewater treatment agent. The heavy metal wastewater treatment agent is prepared from the following raw materials in parts by weight: 3 to 8 parts of polyacrylamide, 15 to 22 parts of phosphorus ferric polychloride, 12 to 18 parts of gypsum, 20 to 28 parts of zeolite, 10 to 15 parts of sodium lignin sulfonate, 6 to 10 parts of polymerized ferric phosphate, 50 to 58 parts of water, 3 to 8 parts of calcium oxide, 12 to 18 parts of aluminum hydroxide, 3 to 8 parts of calcium chloride, 5 to 10 parts of active carbon, 12 to 15 parts of aluminum potassium sulfate and 5 to 8 parts of diatomite. The heavy metal wastewater treatment agent is prepared by treating the polyacrylamide, the phosphorus ferric polychloride, the polymerized ferric phosphate, the calcium chlorid, the sodium lignin sulfonate and the zeolite by high-pressure water steam to prepare a mixture A, mixing the gypsum, the calcium oxide, the aluminum hydroxide, the active carbon, the aluminum potassium sulfate, the diatomite and the water, and carrying out ultrasonic treatment to obtain a mixture B, and putting the mixture A into the mixture B and treating. The heavy metal wastewater treatment agent disclosed by the invention has a chelating effect on heavy metal, has the advantages of short precipitation time, good effect, low cost and complete treatment, and can be widely applied to the field of heavy metal wastewater treatment.
Owner:范洲卫

Flocculating agent for industrial wastewater treatment and manufacturing method thereof

The invention discloses a flocculating agent for industrial wastewater treatment and a manufacturing method thereof, and belongs to the field of water treatment agents. The flocculating agent is manufactured from, by weight, 8-18 parts of polyacrylamide, 5-15 parts of ferrous sulfate, 3-9 parts of aluminum potassium sulphate, 4-12 parts of polysilicate, 4-12 parts of aluminium polychlorid, 8-12 parts of polyoxyethylene, 5-10 parts of barium carbonate, 10-25 parts of tripoli, 8-18 parts of zinc chloride, 3-9 parts of aluminium chloride, 5-15 parts of polymeric phosphate-ferric chloride, 1-5 parts of polymeric ferric phosphate and 50-70 parts of water. The flocculating agent for industrial wastewater treatment is short in flocculent precipitate time, good in effect and low in cost, the active emulsifying ability of hydrones is improved, hazardous substances and heavy metal of water are degraded, high-concentration and high-turbidity wastewater and non-degradable wastewater can be effectively treated particularly, the flocculating agent can be widely used for municipal wastewater and various industrial wastewater treatment and polluted river and lake water treatment, and the treated water can be recycled.
Owner:GUILIN CHUNXIAO ENVIRONMENTAL PROTECTION TECH CO LTD

Method and device for advanced sewage nitrogen and phosphorus removal

The invention discloses a method and device for advanced sewage nitrogen and phosphorus removal. The method comprises the steps of (I) guiding raw sewage into an anaerobic tank; (II) guiding the mixed liquid after treatment in the anaerobic tank into a first solid-liquid separation unit, guiding the supernate into a nitrifying tank, and guiding the produced mud-water mixture into an anoxic tank; (III) guiding the mixture after treatment in the anoxic tank into a second solid-liquid separation unit and an aerobic tank respectively; (IV) guiding the supernate produced after treatment by the second solid-liquid separation unit into the nitrifying tank, and returning the mud-water mixture into the anoxic tank; (V) guiding the nitrified liquid after treatment in the nitrifying tank into the anoxic tank; (VI) enabling the mixed liquid after treatment in the aerobic tank to flow back to the anoxic tank, and guiding into a sedimentation tank; (VII) performing backflow and discharge on the sludge produced by the sedimentation tank. By adopting the method and device disclosed by the invention, the competition conflict for a carbon source between phosphorus removal and nitrogen removal of the sewage treatment system is solved, advanced sewage phosphorus and nitrogen removal can be realized, and the standing time of the solid-liquid separation unit is short. The method and the device are suitable for building a new sewage plant, and the transformation of an existing sewage plant is easily realized by separating tanks of the A2 / O technology.
Owner:HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL

Sulfide heavy metal chelating trapping agent and preparation method thereof

The invention discloses a sulfide heavy metal chelating trapping agent. The trapping agent is prepared by a method of: dissolving 550g of mercaptoethylamine hydrochloric acid into 3L of chloroform; adding 900g of triethylamine as an acid binding agent; adding 400g of 3,3',5,5'-biphenyl 4-formyl chloride into 2L of chloroform; stirring and mixing the two kinds of solution, wherein the stirring velocity is between 30 and 100 r.min<-1>; performing a condensation reaction in an ice bath for 3 to 8 hours under protection of nitrogen; filtering the mixture, and extracting with water and the chloroform respectively; and distilling out redundant solvent with a rotary evaporator to obtain a white precipitate, namely a target product. The trapping agent fast reacts with various heavy metal ions in waste water at the normal temperature and generates a water-insoluble sulfide precipitate. The sulfide heavy metal chelating trapping agent has the advantages of simple preparation process and convenient use. The particle size of the produced sulfide precipitate is large, the floc is compact, the precipitation time is reduced, the concentration of heavy metal ions in the waste water below the national discharging standard, generated residue can be used for recycling heavy metal, and no secondary pollution is generated, The trapping agent can also be used for recycling precious metal in aqueous solution.
Owner:南京正隆环保工程有限公司
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