Poly(ferric zinc aluminum sulphrate), and preparation thereof and method for treating sewerage by using same

Abstract

The invention discloses polymeric aluminum zinc ferric sulfate, a preparation method thereof and a method for using the polymeric aluminum zinc ferric sulfate to treat sewage, and relates to sewage treatment. The invention aims to provide polymeric aluminum zinc ferric sulfate which has high removal ratio to COD and SS of the sewage, a preparation method thereof and a method for using the polymeric aluminum zinc ferric sulfate to treat the sewage. The polymeric aluminum zinc ferric sulfate is a polymeric liquid of aluminum sulfate, zinc sulfate and ferric sulfate. The polymeric aluminum zinc ferric sulfate has the following production steps: (1) 2 to 5 portions of industrial waste sulfuric acid with a concentration of between 10 and 30 percent and 0.1 to 0.5 portion of scrap iron are added into a reaction kettle, and 0.005 to 0.01 portion of hydrogen peroxide is added to react for 1 to 5 hours at normal temperature; and (2) 0.03 to 0.1 portion of zinc oxide and 0.05 to 0.1kg of alumina powder are added into the reaction kettle to react for 1 to 3 hours when the temperature is increased to between 40 and 120 DEG C to obtain liquid polymeric aluminum zinc ferric sulfate. The invention is used for the sewage treatment.

Description

Technical field: [0001] The invention relates to a sewage treatment, in particular to a polyaluminium-zinc-iron sulfate, a preparation method thereof and a method for treating sewage. Background technique: [0002] For the treatment of high turbidity natural water, coal washing, ore washing water, the technologies currently used include ferrous chloride or aluminum sulfate liquid for treatment, the most commonly used is ferrous sulfate or polyaluminum chloride liquid for treatment, the above treatment agents The removal rate of chemical oxygen demand (COD) and suspended solids (SS) of sewage is low, generally not more than 20%. Invention content: [0003] The purpose of the present invention is to provide a kind of polyaluminium-zinc-iron sulfate with high removal rate of COD and SS in sewage, its preparation method and the method for treating sewage. The technical scheme of the present invention is a polymerized aluminum-zinc-iron sulfate liquid, which includes aluminum ...

AI Technical Summary

Problems solved by technology

[0002] For the treatment of high turbidity natural water, coal washing, ore washing water, the technologies currently used include ferrous chloride or aluminum sulfate liquid for treatment, the most commonly used is ferrous sulfate or polyaluminum chloride liquid for treatment, the above treatment agents The removal rate of chemical oxygen demand (COD) and suspended solids (SS) of sewage is low, generally not more than 20%