Printing and dyeing wastewater deep treatment method and equipment

Abstract

The invention provides a printing and dyeing wastewater deep treatment method and equipment. The method comprises the following steps: regulating the pH value in an adjustment tank before a Fenton reaction, and adding a catalyst at the tail end of the adjustment tank; adding hydrogen peroxide in the early stage of a Fenton reaction tank, and adding PFS in the middle-late stage of the Fenton reaction tank according to the water quality condition, and adding an alkaline liquor at the tail end of the Fenton reaction tank to adjust the pH value of effluent; adding PAC at the coagulation section ofa sedimentation tank, and adding PAM accordingly, performing a coagulation reaction, and separating mud and water at the sedimentation section of the sedimentation tank; and performing biodegradationand adsorptive filtration on the effluent of the sedimentation tank in a bio-activated carbon filter tank. The printing and dyeing wastewater deep treatment method and equipment have low cost and efficient treatment.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a method and equipment for advanced treatment of printing and dyeing wastewater. Background technique [0002] With the rapid development of industry, a lot of refractory wastewater has been produced. Among them, the wastewater produced by textile dyeing and finishing has the characteristics of refractory degradation and heavy metal residues. After this kind of industrial wastewater enters the environmental water body, it will cause serious damage to aquatic organisms and even human health. hazards. In order to remove the biodegradability of refractory organic matter in wastewater and explain some of the refractory organic matter, the Fenton process is widely used. The Fenton process can oxidatively degrade many types of organic matter, because the essence of the Fenton reaction is H 2 o 2 in Fe 2+ Under the catalytic action, it can generate oxidation-reduction potential second...

AI Technical Summary

Problems solved by technology

[0004] The discharge of industrial wastewater in the textile dyeing and finishing industry ranks third in China's industrial wastewater discharge. Reuse of reclaimed water after advanced treatment of printing and dyeing wastewater through ultrafiltration workshops can effectively alleviate the shortage of water resources, but the extent to which ordinary advanced treatment can improve water quality limited

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