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Indexed by:期刊论文

Date of Publication:2008-02-01

Journal:BIODEGRADATION

Included Journals:SCIE、EI、PubMed

Volume:19

Issue:1

Page Number:93-98

ISSN No.:0923-9820

Key Words:bromoamine acid (BA); decolorization; azo dye; Oxidation-Reduction Potential (ORP); redox mediator; salt-tolerant bacteria

Abstract:The accelerating effect of quinones has been studied in the bio-decolorization processes, but there are no literatures about the incorporation bio-treatment technology of the bromoamine acid (BA) wastewater and azo dyes wastewaters under high-salt conditions (NaCl, 15%, w/w). Here we described the BA wastewater as a redox mediator in the bio-decolorization of azo dye wastewaters. Decolorization of azo dyes was carried out experimentally using the salt-tolerant bacteria under the BA wastewater and high-salt conditions. The BA wastewater used as a redox mediator was able to increase the decolorization rate of wastewater containing azo dyes. The effects of various operating conditions such as dissolved oxygen, temperature, and pH on microbial decolorization were investigated experimentally. At the same time, BA was tested to assess the effects on the change of the Oxidation-Reduction Potential (ORP) values during the decolorization processes. The experiments explored a great improvement of the redox mediator application and the new bio-treatment concept.