Efficient sewage treatment precipitant and a preparation method thereof

Abstract

The invention relates to the technical field of sewage treatment, and particularly discloses an efficient sewage treatment precipitant and a preparation method thereof. The precipitant is prepared from poly(diallyldimethylammonium chloride), a sodium hydroxyethyl cellulose aqueous solution and a sodium silicate aqueous solution, wherein the mass ratio of sodium hydroxyethyl cellulose to sodium silicate is 1:8-1:10, and the mass ratio of poly(diallyldimethylammonium chloride) to sodium hydroxyethyl cellulose is 1:1.7-1:2. The precipitant has the characteristics of larger flocs, lower dosage, notoxicity, lower synthesis price and higher precipitation efficiency.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a precipitant for high-efficiency sewage treatment and a preparation method thereof. Background technique [0002] Generally speaking, in terms of floc size, compactness, settling velocity and final flocculation effect, inorganic low-molecular and high-molecular-weight flocculants are not as good as inorganic-organic high-molecular composite flocculants, and the dosage of the former is also significantly more than the latter. Anionic organic polymer flocculants cannot provide neutralization for negatively charged colloidal particles, and the effect is very poor when used alone as a flocculant. Inorganic flocculants have strong practicability for water treatment of various complex components, and can effectively remove micro-nano particles, but the flocs formed are small and the dosage is large. The amount of organic flocculants is small, the flocculation speed is fast,...

AI Technical Summary

Problems solved by technology

[0003] Therefore, the existing precipitants for sewage treatment have the problems of small flocs, large dosage, toxicity, high synthesis price and low sedimentation efficiency.