2results about How to "With flocculation" patented technology

The application provides a method for preparing multifunctional composite flocculants by using pyrolysis carbonized slag, and relates to the technical field of solid waste treatment. The method comprises three steps of magnetic separation, catalytic activation and acid dissolution oxidation. First, impurities in the pyrolysis carbonized slag are removed through magnetic separation; then, an activator zinc chloride solution and a catalyst are added, and a high-temperature reaction is carried out under an inert atmosphere to obtain iron-containing activated carbon; finally, acid dissolution oxidation is carried out, iron-containing waste hydrochloric acid and an oxidizing agent are added, and multifunctional composite flocculants are prepared. The flocculants have the dual effects of adsorption and flocculation, and are particularly suitable for treating high-COD and high-color wastewater, can effectively improve the COD removal rate and the decolorization effect, and have obvious advantages compared with the removal effect of conventional ferric chloride water treatment agents. The method provided by the application is low-energy and high-efficiency, and a water treatment flocculant that can be directly applied is prepared, and efficient and clean utilization of solid waste is realized.

The application discloses a preparation method and application of a cellulose nanofiber-based cationic polyacrylamide flocculant. During preparation, a mixed solution obtained through centrifugation is subjected to an esterification reaction under ice bath conditions to obtain a cellulose macromolecular initiator; under absolute anaerobic and ice bath conditions, a grafting reaction is completed in a flask through a Cu(0)-mediated reversible active radical polymerization method to obtain a cellulose nanofiber-based cationic polyacrylamide flocculant solution. The prepared cellulose nanofiber-based cationic polyacrylamide flocculant is used as a water treatment flocculant to remove suspended particles in suspended substance wastewater. The cellulose nanofiber-based cationic polyacrylamide flocculant prepared by the application has significantly improved cellulose dispersibility and stability, and compared with a traditional flocculation process, the flocculant has both flocculation and coagulation effects and exhibits a relatively fast settling speed.