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Fluidized bed treatment device for printing and dyeing wastewater

A printing and dyeing wastewater and treatment device technology, applied in the field of environmental technology and water treatment, can solve the problems of low three-phase separation efficiency, excessive shedding of biofilm, high cost of anaerobic reaction, etc., to improve carrier loss, solve easy clogging, and quickly The effect of efficient degradation

Inactive Publication Date: 2011-11-30
ZHEJIANG UNIV
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  • Abstract
  • Description
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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

Method used

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  • Fluidized bed treatment device for printing and dyeing wastewater
  • Fluidized bed treatment device for printing and dyeing wastewater

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Embodiment

[0019] The fluidized bed treatment device for printing and dyeing wastewater of the present invention is used to treat wastewater containing various dyes with a total concentration of 100 mg / L, a COD of 1000 mg / L, and an initial pH of 7.5. The operating parameters of the fluidized bed are: the circulating water flow rate of the anaerobic fluidized bed is 70L / h, the aerobic aeration rate is 0.4m3 / h, and the total hydraulic retention time is 30 hours. The effluent COD removal rate reaches 94.3%, and the chromaticity removal rate reaches 87.5%. The data show that printing and dyeing wastewater can be treated quickly and thoroughly by using anaerobic-aerobic combined biological fluidized bed.

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F103/30
Inventor 雷乐成张兴旺林君
Owner ZHEJIANG UNIV
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