Method for processing high-density PVA-containing desizing wastewater and device thereof

Abstract

The invention relates to a method for processing high-density PVA-containing desinzing wastewater and a device thereof. The device comprises a wastewater regulating tank, a coagulation sedimentation tank, a salting-out tank, an advanced oxidation reaction sedimentation tank, a diaphragm type hypoxic-anaerobic reaction tank, an aerobic tank, and a secondary sedimentation tank; the coagulation sedimentation tank, the salting-out tank, and the advanced oxidation reaction sedimentation tank all comprise a mixing and stirring area and a sedimentation area, the diaphragm type hypoxic-anaerobic reaction tank comprises a facultative segment, an anoxic segment, and an anaerobic segment which are formed by separating the diaphragm type hypoxic-anaerobic reaction tank with baffle plates; the water volume and pH value of waste water are adjusted in the wastewater regulating tank, then the wastewater enters the coagulation sedimentation tank and is mixed with a coagulation agent to carry out reactions, then wastewater enters the salting-out tank to carry out a salting-out reaction, the pollutant is oxidized and decomposed in the advanced oxidation reaction sedimentation tank, then wastewater enters the diaphragm type hypoxic-anaerobic reaction tank and the aerobic tank to carry out hypoxic, anaerobic and aerobic reactions, then the waste water is subjected to a sedimentation treatment, and finally the wastewater is discharged when the quality of the wastewater meets standards. The device has the advantages of simple structure, low manufacture cost, and very good processing effect.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a treatment method and device for high-concentration PVA-containing desizing wastewater. Background technique [0002] my country's textile printing and dyeing wastewater accounts for 35% of the industrial wastewater discharge, and it is a large industrial wastewater discharge. The desizing wastewater is a kind of difficult-to-treat industrial wastewater. The water volume and quality fluctuate greatly, the composition is complex, the COD content is extremely high, and often contains polyethylene. Refractory biodegradable pollutants such as alcohol (PVA) have poor biodegradability. [0003] At home and abroad, the treatment methods for PVA-containing wastewater mainly include foam separation, ultrafiltration salting out, oxidant oxidation, microwave radiation, ultrasonic degradation, advanced oxidation, high-efficiency degradation bacteria biodegradation, anaerobic biologi...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: in order to solve the treatment of complex and changeable desizing wastewater c

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