Process for completely disposing paint sewage

Abstract

The invention discloses a process capable of treating clean spray paint wastewater. First, H2O2+FeSO4 reagents are used to pretreat paint spray wastewater, and then PAM and PAC are added to coagulate and precipitate it. After these two steps of treatment, the effluent further enters the biochemical process. Treatment system, when the pH is low, H2O is decomposed by ferric ions to generate hydroxyl groups with strong oxidizing ability. Through the reaction of hydroxyl groups with strong oxidizing ability and organic matter, the refractory organic matter in the wastewater is oxidized, and the organic matter in the wastewater The C-C bond of the C-C bond breaks, and finally decomposes into H2O and CO2, and reduces CODcr, or couples or oxidizes, changes its electron cloud density and structure, and forms intermediate products with less molecular weight, thereby changing their solubility and mixing. At the same time, Fe2+ is oxidized to Fe(OH)3, and the effluent further removes pollutants through subsequent coagulation sedimentation and biochemical treatment to achieve the purpose of purification. This process makes the treatment of spray paint sewage clean, meets the discharge requirements, and protects the environmental safety.

Description

technical field [0001] The invention relates to a process, in particular to a process capable of treating spray paint sewage cleanly. Background technique [0002] Sewage, usually refers to certain polluted discharge water from domestic and production. Sewage mainly includes domestic sewage, industrial wastewater and initial rainwater. The main pollutants of sewage are pathogenic pollutants, oxygen-consuming pollutants, plant nutrients and toxic pollutants. From the viewpoint of the source of sewage, sewage can be defined as waste-carrying liquid or water discharged from residential, institutional, commercial or industrial areas mixed with groundwater, surface water, snowstorms, etc. There are many types of sewage, and correspondingly there are many technologies and processes to reduce the impact of sewage on the environment. According to the source of sewage, sewage can be divided into these four categories. The first category: Industrial wastewater Sewage from manufact...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem that the sewage generated in the above-mentioned existing painting process contains many toxic substances, and its treatment is not clean, causing environmental pollution after discharge. The sewage treatment is clean, meets the discharge requirements, protects the environment and safety, and solves the problem that the sewage generated in the existing painting process contains many toxic substances, and its treatment is not clean, causing environmental pollution after discharge.

[0006] In summary, the beneficial effects of the present invention are: the process makes the spray paint sewage clean, meets the discharge requirements, protects the environmental safety, and solves the problem that the sewage generated in the existing paint spray process contains many toxic substances, and its treatment is not clean. Cause environmental pollution after discharge