Method for treatment of dye and PVA containing neutral wastewater by UV collaborated complexing/Fenton system

Abstract

The invention discloses a method for treatment of dye and PVA containing neutral wastewater by a UV collaborated complexing / Fenton system. The steps include: subjecting the wastewater to anaerobic treatment by a microbial porous metal membrane reaction zone and aerobic treatment by a sprouted bed bioreactor, using a complexing agent to form a PVA-polymethylacrylic acid complex, adding a flocculant to form precipitate, utilizing scrap steel and the byproduct waste generated by production of titanium dioxide from ilmenite, and under the irradiation of certain intensity ultraviolet (UV), adding hydrogen peroxide and carrying out magnetic stirring reaction to conduct UV / Fenton oxidation. According to the invention, through dynamic control of the complexing agent, catalyst and hydrogen peroxide adding amount, ultraviolet intensity, time and other key factors, the optimal treatment effect can be obtained, efficient treatment of the dye and PVA containing wastewater can be realized under a neutral pH condition, the scrap steel and the byproduct waste generated by production of titanium dioxide from ilmenite are utilized reasonably so as to achieve waste control by waste, and the treatment efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a method for treating neutral waste water containing dyes and PVA by using a UV synergistic complexation / Fenton system. Background technique [0002] Sizing, dyeing, desizing, finishing and other processes are the main processes in the textile dyeing and finishing industry, and a large amount of industrial wastewater will be generated during the production process. Polyvinyl alcohol (PVA), as a water-soluble and non-toxic polymer, has been widely used because of its low price, excellent film-forming properties, adhesion and compatibility with other slurries. Used as slurry in textile engineering. Therefore, textile dyeing and finishing industrial wastewater often contains a large amount of dyes and PVA. PVA has poor biodegradability and is difficult to biodegrade; dye wastewater has deep color, high alkalinity, and large changes in water quality. Discharge of ...

AI Technical Summary

Problems solved by technology

Among them, although the ultraviolet light Fenton system has the advantages of simple equipment, low energy consumption, and low drug consumption, the iron ion in the single ultraviolet light synergistic Fenton system is still the main catalyst, and the system is greatly affected by pH; Affected by the chromaticity and water quality of wastewater, the scope of application is narrow, and the effect is difficult to guarantee

[0008] Therefore, only unilaterally using the complexation of the complex or UV irradiation can not broaden the pH application range of the Fenton system while maintaining the high reaction efficiency of the Fenton system and ensuring the treatment effect of neutral wastewater containing dyes and PVA

[0009] Retrieval of relevant documents shows that before the date of application for this patent, no documents containing dyes and PVA neutral wastewater similar to the present invention have been found.