Fluidized bed treatment device for printing and dyeing wastewater

Abstract

The fluidized bed treatment device for printing and dyeing wastewater disclosed by the present invention includes an anaerobic fluidized bed reactor and an aerobic fluidized bed reactor, respectively introducing circulating microbial carriers into the aerobic and anaerobic fluidized bed reactors, Using aerobic and anaerobic combined treatment technology to achieve efficient removal of refractory azo dyes. The device of the invention successfully solves the technical problem that the conventional packed bed is easily blocked. Compared with the ordinary activated sludge process, the device of the present invention has the advantages of compact and simple structure, small footprint, high chromaticity and CODCr removal rate, good effluent quality, dynamic and continuous treatment, and the like.

Description

technical field [0001] The invention relates to a device for treating printing and dyeing wastewater, belonging to the fields of environmental technology and water treatment. Background technique [0002] Printing and dyeing wastewater has a large amount of water, high chroma, and complex components, including dyes, pastes, and auxiliaries left in the dyeing process. It is highly toxic to organisms and is one of the most difficult industrial wastewater to treat. In recent years, with the continuous development of the printing and dyeing industry, the development of new dyes and auxiliaries, especially the increasing number of azo dyes, has led to a large amount of refractory organic matter entering the printing and dyeing wastewater, and ordinary microbial systems and methods are difficult to achieve ideal treatment. As a result, most of the original biological treatment systems have reduced the COD removal rate from 70% to 50% or even lower, and the traditional treatment pr...

AI Technical Summary

Problems solved by technology

However, the three-phase separation efficiency of the traditional biological fluidized bed is not high, resulting in a large loss of carriers; at the same time, the internal structure is relatively complex, resulting in excessive shedding of some biofilms, which affects the treatment effect

Also, the use of gas as a lifting power makes anaerobic reactions too costly or difficult to perform

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