6results about How to "Improve flocculation ability" patented technology

The invention discloses a modified flocculant and equipment for rapidly removing microplastics in drinking water, and the modified flocculant is a polyaluminum sulfate-titanium tetrachloride-poly dimethyl diallyl ammonium chloride ternary composite flocculant. The pH application range value is increased by compounding with the poly dimethyl diallyl ammonium chloride, the charge neutralization bridging and netting capabilities are enhanced, and the adsorption bridging through a polymer chain is enhanced, so that the flocculant has the advantages of strong flocculation capability, quick demulsification, high settling velocity and small flocculant volume; and the water purifier has very strong purification capacity on fine suspended matters such as micro-plastics in water. Through the special flocculant adding, stirring and precipitation structure design, the removal rate of the micro-plastics is remarkably improved.

The invention provides a preparation method and application of a flocculating agent. The method comprises the following steps: 1) dissolving a first monomer, a second monomer and a third monomer in water, and removing oxygen to obtain a monomer aqueous solution; 2) adding an initiator into the monomer aqueous solution, and reacting to obtain a reactant; and 3) washing the incompletely reacted initiator in the reactant, drying, and crushing to obtain the flocculant, wherein the first monomer is polyaluminum chloride, the second monomer is methacryloyloxyethyl trimethyl ammonium chloride and / or acrylamide propyl trimethyl ammonium chloride, and the third monomer is acrylamide.

This invention provides the application of polyferric sulfate in improving plant salt stress resistance and / or improving saline-alkali land, belonging to the field of agricultural technology. The polyferric sulfate application provided by this invention can effectively improve the germination ability of plant seeds under salt stress, effectively enhance the activity of plant antioxidant systems and photosynthetic efficiency, thereby effectively improving the survival rate and growth performance of plants under salt stress. Simultaneously, polyferric sulfate can effectively reduce the EC value of saline-alkali soil, thereby effectively improving the germination rate of plant seeds in saline-alkali land and effectively improving saline-alkali land. This invention is simple to operate, low in cost, and environmentally friendly, suitable for enhancing the salt and alkali tolerance of plants, and has broad application prospects.

The invention discloses an ecological flocculant based on cassava starch as well as a preparation method and application thereof, and belongs to the technical field of dredged soil treatment. The preparation method comprises the following steps: dispersing cassava starch in water, stirring until the cassava starch is completely dissolved, adding a sodium hydroxide solution under the conditions of water bath heating and stirring, and carrying out alkalization reaction to obtain a first mixed solution; dropwise adding a 3-chloro-2-hydroxypropyl trimethyl ammonium chloride solution into the first mixed solution, and continuously performing an etherification reaction under the conditions of water bath heating and stirring to obtain a second mixed solution; after the reaction is finished, standing and cooling the second mixed solution to room temperature, and adjusting the pH to be neutral to obtain a flocculant mother solution; precipitating the flocculant mother liquor, washing, filtering, drying to constant weight, and grinding into powder to obtain the cassava starch-based ecological flocculant. The cassava starch-based ecological flocculant used in the invention is rich in cationic groups, has good solubility, is easy to fully disperse in dredged soil slurry, and has excellent dredged soil flocculation capability.

The invention discloses a method for synergistically preparing tea saponin and a microbial flocculant, which comprises the following steps: preparing tea saponin crude extract and oil-tea cake extract from oil-tea cake, preparing the extract into an oil-tea cake culture medium, inoculating a flocculation functional bacteria seed solution for culturing, and preparing a pure microbial flocculant product. Preparing the tea saponin into a solution, mixing the solution with a tea saponin crude extract after oil removal and a coagulant aid solution for flocculation, and standing to obtain liquid tea saponin; and carrying out primary concentration, extraction, decoloration and secondary concentration on the liquid tea saponin to obtain the solid tea saponin. According to the method for synergistically preparing the tea saponin and the microbial flocculant, the microbial flocculant and the tea saponin which are high in yield and purity can be prepared at the same time, circulating sharing of water and an organic solvent can be achieved, and resource utilization of the oil tea cakes is achieved. The method also has the advantages of simple process, convenience in operation, low cost, environmental friendliness and the like, and is high in use value and good in application prospect.

The present invention belongs to the technical field of sewage treatment, and specifically relates to a high-efficiency multifunctional water purifier, a preparation method and application thereof. The preparation method is: CFN coexistence and blending degradation agent, FNX synergistic removal agent, modified alumina powder, modified activated carbon powder calcium salt, flocculant, and complex catalyst are mixed in steps. Among them, the flocculant is a carboxymethyl chitosan derivative, which is prepared by epoxy compound ring-opening reaction, quaternization reaction, and esterification reaction in sequence; the carboxymethyl chitosan derivative contains mercaptobenzothiazole and quaternary ammonium salt structure, and has excellent adsorption performance, corrosion inhibition performance and antibacterial performance. The high-efficiency multifunctional water purifier provided by the present invention realizes the effective removal of multiple pollution factors. After the agent is added, the pH fluctuation of the sewage is small, and no subsequent acid-base adjustment is required. It can reduce the cost of sewage treatment at multiple levels, while improving the treatment efficiency and effluent quality.