58results about How to "High turbidity removal rate" patented technology

The invention relates to a silicone iron zinc coagulant and a preparation method thereof, relating to an inorganic polymer coagulant and a preparation method thereof. The invention solves the affection of weak adaptability to low temperature and low turbidity water quality, low turbidity removal rate, residual chroma and fast hydrolysis of the existing molysite coagulant, and the problems of complicated preparation process, high cost of raw materials and long time consuming, and production of second pollution to environment. The silicone iron zinc coagulant is prepared by sodium silicate, dilute sulphuric acid solution, sodium bicarbonate, ferrous sulfate, zinc sulfate and an antioxidant. The preparation method comprises the following steps of: 1. weighing raw materials; 2. preparing clustering silicic acid solution; 3. preparing the clustering ferrosilicon zinc solution and 4. adopting a reverse contact type spray drying method or cocurrent flow contact type spray drying method to dry the clustering ferrosilicon zinc solution, thus obtaining the clustering ferrosilicon zinc coagulant. The product has the advantages of being suitable for low temperature and low turbidity water quality, more than 99 percent of the turbidity removal rate, no residual chroma and being not easy to be hydrolyzed, low preparation cost, simple method and no pollution in preparing process.

The invention discloses a printing and dyeing sewage treatment agent which is mainly prepared from the following components in parts by weight: 10 parts of sodium polyacrylate, 5-25 parts of starch, 30-50 parts of bentonite, 5-15 parts of ferric sulfate, 5-15 parts of alum, 0.5-1.5 parts of aluminum sulfate, 1-9 parts of activated carbon, 1-7 parts of basic aluminum oxide, 0.5-1.5 parts of ferrous sulfate, 0.2-0.8 part of nickel nitrate, 10-20 parts of chitosan and 0.02-0.08 part of polysorbate. Compared with the prior art, the printing and dyeing sewage treatment agent disclosed by the invention is simple in process and low in cost, can significantly improve the chroma removal rate, the turbidity removal rate and the COCcr removal rate of printing and dyeing sewage, and is excellent in performance.

The invention relates to a preparation method of polyferric sulfate (PFS). The method comprises the following steps of dissolving a certain amount of bivalent ferric salt into water; adjusting the pH value through sulfuric acid, and heating and stirring in a water bath; adding a certain amount of persulfate serving as an oxidant to oxidize Fe<2+> in solution; and performing hydrolytic polymerization to obtain PFS. A novel method is provided for the preparation of PFS. The method disclosed by the invention has a simple process; a prepared PFS coagulant has a good coagulation effect and high turbidity removal rate of up to 94.6 percent; moreover, various indexes of the prepared PFS coagulant are consistent with the requirement of PFS serving as a GB14591-2006 water treatment agent; furthermore, the using amount of ferrous sulfate required to be added in the method is small, the adding speed of sodium persulfate serving as an oxidant is easy to control, and ferrous iron is fully oxidized; and moreover, the method has the advantages of simple operating process, no corrosion, wide pH application range, low cost, high performance and a very good market prospect.

The invention relates to the technical field of water supply treatment, and specifically relates to a diatomite/cellulose inorganic-organic composite filter aid for directly filtering micro-polluted water source as well as a preparation method and an application of the diatomite/cellulose inorganic-organic composite filter aid. The diatomite/cellulose inorganic-organic composite filter aid is characterized by carrying out pre-hydrolyzing, stirring and reacting on cellulose in the water at 50-90 DEG C; adding anhydrous ethanol dispersion of diatomite and stirring; then adding ammonia water to adjust the pH to an alkaline condition suitable for polycondensation of the cellulose; preserving the heat to carry out the polycondensation; stirring to obtain cellulose-diatomite sol; and ageing to obtain gel and then treating to obtain the diatomite/cellulose inorganic-organic composite filter aid. The diatomite/cellulose inorganic-organic composite filter aid for directly filtering the micro-polluted water source has the characteristics that the turbidity removal rate is high, the turbidity removal rate is only slightly reduced as the increase of the filtration speed, and the reduction is not obviously; and the diatomite/cellulose inorganic-organic composite filter aid can be used for accelerating the filtration speed and increasing the water production efficiency.

The invention discloses a treating system and method for coking waste water. The treating system comprises a gas-energy flocculation device, at least one multi-element catalytic oxidation device and at least one biochemical device, which are successively arranged. The treating method comprises the following steps: gas-energy-flocculation pretreatment; and multi-element catalytic oxidation and biochemical treatment once or multiple times. The coking waste water contains complex organic components and high-concentration and difficultly biodegradable organic matters which cannot be degraded through simple biochemical process, so CODs in effluent exceed standards; the coking waste water contains a great number of biologically toxic substances which are not biodegradable, inhibit microbes and influence normal treatment effect on the microbes; and besides organic pollutants, the coking waste water also contains high-concentration ammonia-nitrogen and total nitrogen, which also influences normal operation of a biological treatment process.

The invention provides a sewage treatment complexing agent as well as a preparation method and an application method thereof. The sewage treatment complexing agent comprises components in percentage by weight as follows: 60%-80% of a main agent, 10%-25% of a pH regulator, 5%-10% of a proportion increasing agent and 2%-6% of an adsorbent, wherein the main agent comprises at least one of aluminum sulfate, sodium carbonate and quicklime. The preparation method of the complexing agent comprises the following steps: the components are weighed respectively according to the formula of the sewage treatment complexing agent, and mixing treatment is performed to obtain the sewage treatment complexing agent. The sewage treatment complexing agent has high flocculation and sedimentation speed as well as high turbidity removal rate, can purify water efficiently, is pollution-free for natural environment and is applied to sewage treatment and landfill leachate treatment.

The invention relates to a coagulation process in water treatment purification technology, wherein metal salt flocculating agent and aquadrate starch are mixed in the form of water solution, and are charged into the water to be processed, the aquadrate, dried maize starch and water solution are mixed for mixing reaction for 3-4 hours under the temperature condition of 90-100 deg. C. The invention realizes fine water purification effect and less influence from water temperature.

The way to produce active attaching dose and the way of handling by strong water, concerns the way of produce active attaching dose using mire in the mire handling craft and the technique of strengthen water handling using the active attaching dose. The way to get the active attaching dose: handling the living dirty water to the solid-liquid separating thing, and filter them to separate the mire and water; heat the mire after filtered, crash them to grains; dip the grains into the acid, finish activating by mixing; heat, crash, then the active attaching dose is made. The way to strengthen the water by active attaching dose is: put the original water into the mixing pond, reaction pond, filtering pond, disinfecting pond, adding chemical dose into the mixing pond, adding mud attaching dose into the reaction pond. The mud attaching dose hydrochloric acid' fusing rate can attain round to 0.25%, NaOH's fusing rate is around 1.05%, after filtered the mud missing rate increase 10%--50%, organic pollution matter missing rate increase 10%--40%.

The invention discloses a preparing method for a dyeing waste water treating agent. The preparing method includes the following steps that bentonite, ferric sulfate, alums, aluminum sulfate, activated carbon, basic aluminum chloride, ferrous sulfate and nickel nitrate are taken, mixed and smashed into fine powder; chitosan is added into certain amount of pure water and dissolved through heating, sodium polyacrylate and starch are added and stirred, and an intermediate material is obtained after heat preservation; the fine powder and the intermediate material are mixed, and polysorbate is added and stirred to obtain the dyeing waste water treating agent. Compared with the prior art, the preparing method is simple in technology and low in cost, the chroma removing rate, the turbidity removing rate and the COCcr removing rate of dyeing waste water treated by the obtained dyeing waste water treating agent can be substantially increased, and the dyeing waste water treating agent is excellent in performance.

The invention discloses a preparation method for polymeric ferric sulfate. The preparation method includes the following steps: after water is used for diluting sodium silicate until SiO2 content is 4 to 5 percent, the diluted sodium silicate is poured into a reaction kettle, dilute sulphuric acid solution, the concentration of which is 4 to 6 percent, is then added into the reaction kettle, agitation is carried out for 20 to 30 minutes, ferrous sulfate and hydroquinone are sequentially added into the reaction kettle when viscosity reaches the concentration of 2 minute 20 second to 2 minute 40 second determined by a viscometer, and after 10 to 20 minutes of sufficient agitation, activated silicic acid solution is prepared. The process of the method disclosed by the invention is simple, moreover, the coagulation effect of the prepared polymeric ferric sulfate coagulant is good, the turbidity removal rate is high, reaching 96 percent, and furthermore, each index of the prepared polymeric ferric sulfate coagulant meets the requirement of GB14591-2006 polymeric ferric sulfate as water treatment agent.

The invention discloses a sewage treating agent, which is prepared from the following ingredients in parts by weight: 10 parts of sodium polyacrylate, 5-25 parts of starch, 30-50 parts of bentonite, 5-15 parts of ferric sulfate, 5-15 parts of white alum, 0.5-1.5 parts of aluminum sulfate, 1-9 parts of activated carbon, 1-7 parts of basic aluminium oxide, 0.5-1.5 parts of ferrous sulfate, 0.2-0.8 part of nickel nitrate, 10-20 parts of chitosan and 0.02-0.08 parts of polysorbate. Compared with the prior art, the sewage treating agent has the advantages of simple technology and low cost, the chroma removing rate, the turbidity removal rate and the COCrr removal rate of printing and dyeing sewage can be obviously improved, and performance is excellent.

The invention belongs to the technical field of water treatment engineering, and particularly relates to a preparation method of a sewage treatment flocculant. The preparation method of the sewage treatment flocculant comprises the following steps: S1. extraction of wheat bran cellulose; S2. modification of wheat bran cellulose; S3. modification of konjac glucomannan; S4. preparation of a graftedcopolymer; and S5. ionization of the grafted copolymer. In the preparation method provided by the invention, solvent recovery is adopted in a preparation process, so that the pollution to the environment is reduced, and the modified cellulose is directly dissolved, so that the complexity of preparation is reduced. Meanwhile, the flocculant prepared by the preparation method provided by the invention is safe and environment-friendly, and has good degradability and flocculation effect, wherein the turbidity removal rate is as high as 99.7%, the COD removal rate is as high as 94.3%, and the 30-day degradation rate is as high as 68.2%.

The way to produce active attaching dose and the way of handling by strong water, concerns the way of produce active attaching dose using mire in the mire handling craft and the technique of strengthen water handling using the active attaching dose. The way to get the active attaching dose: handling the living dirty water to the solid-liquid separating thing, and filter them to separate the mire and water; heat the mire after filtered, crash them to grains; dip the grains into the acid, finish activating by mixing; heat, crash, then the active attaching dose is made. The way to strengthen the water by active attaching dose is: put the original water into the mixing pond, reaction pond, filtering pond, disinfecting pond, adding chemical dose into the mixing pond, adding mud attaching dose into the reaction pond. The mud attaching dose hydrochloric acid' fusing rate can attain round to 0.25%, NaOH's fusing rate is around 1.05%, after filtered the mud missing rate increase 10%--40%, organic pollution matter missing rate increase 10%--40%.

The way to produce active attaching dose and the way of handling by strong water, concerns the way of produce active attaching dose using mire in the mire handling craft and the technique of strengthen water handling using the active attaching dose. The way to get the active attaching dose: handling the living dirty water to the solid-liquid separating thing, and filter them to separate the mire and water; heat the mire after filtered, crash them to grains; dip the grains into the acid, finish activating by mixing; heat, crash, then the active attaching dose is made. The way to strengthen the water by active attaching dose is: put the original water into the mixing pond, reaction pond, filtering pond, disinfecting pond, adding chemical dose into the mixing pond, adding mud attaching dose into the reaction pond. The mud attaching dose hydrochloric acid' fusing rate can attain round to 0.25%, NaOH's fusing rate is around 1.05%, after filtered the mud missing rate increase 10%--50%, organic pollution matter missing rate increase 10%--40%.

The invention discloses a method and an application for preparing a titanium polysilicate flocculating agent by utilizing a pickling waste liquor of cold-rolled titanium plates, and belongs to the fields of environmental science and safety science. The method comprises the following steps: dissolving Na2SiO3 in deionized water to prepare a Na2SiO3 solution; adding a stabilizer into a dilute sulfuric acid solution, uniformly carrying out mixing to obtain a stabilizer-sulfuric acid solution; dropwise adding the Na2SiO3 solution to the stabilizer-sulfuric acid solution, carrying out a reaction for 1-5 hours during stirring at a room temperature to obtain a polysilicic acid solution; adding the polysilicic acid solution into a pickling waste liquor of cold-rolled titanium plates, carrying outa reaction for 0.1 -3 hours during stirring at a room temperature to obtain the titanium polysilicate flocculating agent. The titanium polysilicate flocculating agent prepared by the method can effectively trap and settle suspended matter in a simulative river, can quickly and efficiently purify a water body, and can also be used for removing chromium of electroplating wastewater and removing nitrogen, phosphorus and chemical oxygen demand (COD) of organic wastewater.

The invention discloses a printing and dyeing sewage treatment agent. The printing and dyeing sewage treatment agent is mainly prepared from components in parts by weight as follows: 10 parts of sodium polyacrylate, 5-25 parts of starch, 30-50 parts of bentonite, 5-15 parts of iron sulfate, 5-15 parts of iron sulfate, 0.5-1.5 parts of aluminum sulfate, 1-9 parts of activated carbon, 1-7 parts of basic aluminum chloride, 0.5-1.5 parts of ferrous sulfate, 0.2-0.8 parts of nickel nitrate, 10-20 parts of chitosan and 0.02-0.08 parts of polysorbate. Compared with the prior art, the obtained printing and dyeing sewage treatment agent has advantages that process is simple, cost is low, chroma removal rate, turbidity removal rate and COCcr removal rate of printing and dyeing sewage can be remarkably increased, and performance is excellent.