Reactive dye printing and dyeing wastewater treatment system

Abstract

The invention relates to the technical field of sewage treatment. The invention discloses a reactive dye printing and dyeing wastewater treatment system. The system comprises a wastewater regulating tank, an anaerobic reactor, a high-pressure air desulfurization device, an aerobic biochemical tank, a secondary sedimentation tank and a physicochemical treatment tank which are sequentially connectedthrough pipelines, wherein a high-pressure spraying device is arranged at the top of the high-pressure air desulfurization device, a micro air floatation releaser connected with an air compressor positioned outside the high-pressure air desulfurization device is arranged at the bottom of the high-pressure air desulfurization device, a booster pump is arranged between the anaerobic reactor and thehigh-pressure air desulfurization device, one end of the booster pump is connected with the anaerobic reactor, and the other end is connected with the high-pressure spraying device. Sulfur ions generated in anaerobic reaction can be rapidly removed through the high-pressure air desulfurization device, biotoxicity is avoided, high-pressure air can be excessively added, desulfurization is thorough,the operation cost is low, no extra sludge is generated, and the reaction speed is high; and the high-pressure air desulfurization device can also change the anaerobic environment of the wastewater into the aerobic environment in advance, so that subsequent aerobic biochemical treatment is facilitated.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a reactive dye printing and dyeing wastewater treatment system. Background technique [0002] Reactive dyes contain one or more reactive groups in their ions or molecules, which can react with hydroxyl groups on cellulose fibers, amino groups on protein fibers, and amino groups on polyamide fibers under appropriate conditions. A class of dyes that form covalent bonds with fibers. Reactive dyes have gradually replaced insoluble azo dyes, direct dyes, sulfur dyes and vat dyes and become the main dyes for cellulose fiber dyeing due to their simple molecular structure, bright color, complete chromatogram, convenient use, and low cost. [0003] However, reactive dyes have the problems of low fixation rate and high salt dyeing, that is, in the dyeing process, it is necessary to add sodium sulfate (Na 2 SO 4 ) and other neutral electrolytes to increase the adsorption rate of...

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Problems solved by technology

[0006] The present invention aims to overcome the existence of more sulfates in the reactive dye wastewater in the prior art, the sulfate radicals will be reduced to sulfides during the treatment process, and the sulfides are biologically toxic and have a toxic effect on activated sludge, which will greatly To reduce the activity of activated sludge and affect the treatment effect of the subsequent aerobic biochemical system, a reactive dye printing and dyeing wastewater treatment system is provided, which uses pressurized air to remove sulfide in wastewater, which can not only avoid the poisoning of sulfide to activated sludge , and complete desulfurization, no biological toxicity, low operating cost, no additional sludge generation

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