Composite flocculant for treating industrial wastewater and preparation method of composite flocculant

Abstract

The invention discloses a composite flocculant for treating industrial wastewater and a preparation method of the composite flocculant, and belongs to the field of water treatment chemicals. The composite flocculant is prepared from the following raw materials in parts by weight: 4-14 parts of aluminum chloride, 4-10 parts of ferrate, 4-10 parts of sodium polyacrylate, 6-10 parts of zinc stearate, 4-10 parts of polymerized aluminum calcium chloride, 2-8 parts of ammonium persulfate, 1-5 parts of shale, 3-9 parts of polymerized ferric phosphate, 4-10 parts of zeolite, 4-16 parts of ferric citrate, 4-10 parts of hydroxyethyl cellulose, 3-9 parts of lignite and 120-160 parts of water. The composite flocculant for treating the industrial wastewater disclosed by the invention is short in flocculation and precipitation time, good in effects and low in cost, the activity and the emulsifying ability of water molecules are improved, hazardous substances and heavy metals in water are degraded, particularly high-concentration high-turbidity wastewater and wastewater which cannot be biochemically treated can be effectively treated, and the composite flocculant can be widely used for treating municipal wastewater, various industrial wastewater and water of polluted rivers and lakes.

Description

technical field [0001] The invention relates to a composite flocculant for treating industrial waste water and a preparation method thereof, belonging to the field of water treatment agents. Background technique [0002] Coagulation treatment is one of the key links in wastewater treatment, which can remove turbidity and pollution, and reduce the pollution load of subsequent sewage treatment. The flocculant is the key factor to determine the effect of coagulation treatment, and has an important impact on the operation status of the subsequent process, the final effluent water quality and cost. According to its chemical composition, flocculants can be generally divided into two types: inorganic flocculants and organic flocculants. Inorganic flocculants include inorganic coagulants and inorganic polymer flocculants; organic flocculants include synthetic organic polymer flocculants, natural organic polymer flocculants and microbial flocculants. Flocculants are mainly groups w...

AI Technical Summary

Problems solved by technology

Due to the current disadvantages of slow flocculation and sedimentation and high drug consumption

Polymer flocculants such as basic polyaluminum chloride (PAC), polyaluminum sulfate, polyferric sulfate, etc., overcome the disadvantages of low processing efficiency of low molecular flocculants, but their cost is high, and when low temperature and low turbidity Poor processing effect

Organic flocculants are generally polymers, such as polyamine flocculants, quaternary ammonium starch-based flocculants, and polyacrylamide flocculants. Among them, polyacrylamide has the advantages of less dosage, strong ability to clarify water quality, and fast flocculation speed. It is not easily affected by the pH value of water, and the amount of sludge generated is less, which has been widely used. However, polyacrylamide has strong neurotoxicity and certain carcinogenicity. When a large amount of polyacrylamide is used to treat wastewater, it will produce polymer residues. , destroying the biological chain of the water body, thereby affecting human health