Process for treating printing and dyeing wastewater through combination method

Abstract

The invention relates to a process for treating printing and dyeing wastewater through a combination method. The process comprises a pretreatment process and a combined treatment process, wherein the pretreatment process comprises the following steps: regulating an aeration process and a neutralization, coagulation and precipitation process, performing pretreatment of aeration regulation and neutralization, coagulation and precipitation on wastewater, and performing combined treatment through microwave+photoelectrocatalysis+industrial waste residue filtration and adsorption. According to the process, degradation-resistant organic matters and other pollutants in the printing and dyeing wastewater can be effectively degraded, a wastewater treatment effect is improved, and the treated wastewater can basically meet the reutilization requirement. According to the process, related problems (particularly complex pollutant components, low biodegradability and high discoloring difficulty of the mixed printing and dyeing wastewater in a concentrated industrial park) for treatment of the printing and dyeing wastewater are effectively solved, a high-efficiency treatment process is provided, the treatment effect is stable, the production operating cost is low, and the operation is simple and convenient.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a combined method for treating printing and dyeing wastewater. Background technique [0002] my country is the largest country in the world's textile printing and dyeing industry, and the textile printing and dyeing industry is a large industrial wastewater discharge, accounting for about 35% of the entire industrial wastewater discharge. According to incomplete statistics, printing and dyeing factories will produce 3 to 5 tons of wastewater for every 100m of fabric processed. Printing and dyeing wastewater has become the most harmful and difficult to control important pollution source due to the entrainment of the fiber raw material itself and the slurry, oil, dyes and chemical auxiliaries used in the processing process. With the development of the chemical properties of modern dyes and auxiliaries towards anti-oxidation, anti-photochemical and anti-biochemical, the t...

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Problems solved by technology

However, the coagulation method has problems such as large dosage of chemicals, high cost, and more solid waste generated.

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