Peracetic acid wastewater treatment system

Abstract

The invention discloses a peracetic acid wastewater treatment system. The system comprises a reaction tank body, a pH value adjuster having a pH value probe and an automatic reducer adding device having an oxidation reduction potential probe, wherein the reaction tank body is divided into a catalytic deoxidization chamber, a chemical reduction chamber and a coagulation-precipitation chamber via a plurality of baffle plates, and the catalytic deoxidization chamber, the chemical reduction chamber and the coagulation-precipitation chamber are communicated in sequence; a water inlet and a water outlet are arranged on the reaction tank body; the water inlet is formed in the side wall of the upper part of the catalytic deoxidization chamber, and the water outlet is formed in the side wall of the upper part of the coagulation-precipitation chamber; a plurality of catalytic filler layers are arranged in the catalytic deoxidization chamber; a liquid outlet of the pH value adjuster is communicated with the catalytic deoxidization chamber; a liquid outlet of the automatic reducer adding device is communicated with the chemical reduction chamber; and both the pH value probe and the oxidation reduction potential probe stretch into the chemical reduction chamber. According to the peracetic acid wastewater treatment system, the strong oxidizing property in peracetic acid wastewater can be reduced, so that the microorganism killing capacity of the peracetic acid wastewater is reduced and the damage from peracetic acid in the wastewater on microorganisms in an anaerobic system or an aerobic system is avoided.

Description

Technical field [0001] The invention relates to a peroxyacetic acid wastewater treatment system, which belongs to the technical field of wastewater treatment. Background technique [0002] At present, the beverage industry is developing rapidly, but it also brings certain environmental pollution problems. The production wastewater of the beverage industry is generally divided into bottle washing wastewater (PAA wastewater), pre-treatment and equipment cleaning water, flushing workshop drainage, cleaning tank wastewater, and dissolving sugar. Waste water, scrap beverages and domestic sewage, etc. Beverage production wastewater has good biodegradability, but because PAA wastewater contains peroxyacetic acid, peroxyacetic acid has a very strong sterilization effect. If it is not pre-treated, it will be very important for subsequent anaerobic or aerobic systems. Impact. Since the peracetic acid in the wastewater has the effect of killing microorganisms and the peroxyacetic acid dec...

AI Technical Summary

Problems solved by technology

Although the addition of sodium thiosulfate can quickly reduce the strong oxidation of PAA wastewater, due to the introduction of sulfur, the wastewater can produce hydrogen sulfide or mercaptan and other odorous gases in the anaerobic stage, becoming a new source of pollution

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