Fluidized bed processing device of printing and dyeing waste water

Abstract

The invention discloses a fluidized bed processing device of printing and dyeing waste water, comprising an anaerobic fluidized bed reactor and an aerobic fluidized bed reactor, wherein circularly flowing microorganism carriers are respectively introduced to the anaerobic and the aerobic fluidized bed reactors, and then the effect of high-efficiently removing azo dyes with difficult degradation is achieved by utilizing an aerobic and anaerobic combined processing technology. The fluidized bed processing device successfully solves the technical problem of easy blockage of the conventional fluidized bed. Compared with the common activated sludge process, the fluidized bed processing device has the advantages of compact and simple structure, small land occupation, high chroma and CODCr removing rate, good quality of discharged water, dynamic and continuous processing 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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