Compound flocculating agent, as well as preparation method and application thereof

Abstract

The invention discloses a compound flocculating agent, as well as a preparation method and application thereof. The compound flocculating agent is prepared from a component A and a component B in a weight ratio of (1-3):(1-3), wherein the component A contains diatomaceous earth, bentonite, smectite, sodium chloride, carclazyte, kaolin, plant essential oil, fruit green pigment and deionized water; and the component B contains cationic polyacrylamide, plant essential oil, fruit green pigment and deionized water. The preparation method comprises the following steps: adding all ingredients in the component A into a reactor at normal temperature and normal pressure to form the component A; slowly adding cationic polyacrylamide into the reactor, and stirring to form the component B. When the compound flocculating agent is used, the component A is put into sewage, and the component B is put into the sewage for coagulating. According to the compound flocculating agent, the flocculate has short forming period and thick and big shape, and is easy to pick up, the COD removal rate is more than 80 percent, the turbidity removal rate for domestic sewage is more than 90 percent, and the total phosphorous removal rate is more than 92 percent. The compound flocculating agent hardly influences the pH value of treated water.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a composite flocculant and its preparation method and application. Background technique [0002] The incomplete treatment of paint slag pollutants in the circulating water of the existing paint spraying plants, printing plants, electroplating plants, sewage treatment plants, etc. leads to a short service life of the circulating water and the occurrence of odorous and foul gas. The circulating water needs to be replaced frequently, which increases the Money is invested in water treatment and pollutes the environment, rivers, etc. In the water treatment process, the flocculant mainly neutralizes the groups with positive (negative) charges and some particles with negative (positive) charges in the water that are difficult to separate, reducing their potential, making them in an unstable state, and Using its polymeric properties, these particles are concentrated and separated...

AI Technical Summary

Problems solved by technology

[0005] There are great differences in the flocculation effect of different formulations and different proportions of inorganic / organic composite flocculants. The content of substances that eliminate the stickiness of pollutants is too much and the content of substances that adsorb pollutants is too small, and the pollutants cannot be completely adsorbed together. , the turbidity after sewage treatment is still very high; when the content of substances that eliminate the stickiness of pollutants is too small, and the content of substances that adsorb pollutants is too high, the flocculant cannot completely eliminate the stickiness of pollutants, and cannot completely remove all pollutants. The pollutants are aggregated and adsorbed together, the removal rate of sewage turbidity is not high, and the sewage treatment is not thorough