High performance degradation of azo dye Acid Orange 7 and sulfanilic acid in a laboratory scale reactor after seeding with cultured bacterial strains

Bacterial strains 1CX and SAD4i—previously isolated from the mixed liquor of a municipal sewage treatment plant—are capable of degrading the azo dye Acid Orange 7 (AO7) and sulfanilic acid, respectively. A rotating drum bioreactor (RDBR), operating under continuous flow and nutrient conditions desig...

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Bibliographic Details
Published in:Water research (Oxford) 2003-06, Vol.37 (11), p.2757-2763
Main Authors: Coughlin, Michael F., Kinkle, Brian K., Bishop, Paul L.
Format: Article
Language:English
Subjects:
Acid Orange 7
Aerobic
Applied sciences
Azo Compounds - metabolism
Azo Dyes
Bacteria
Bacteria, Aerobic - physiology
Benzenesulfonates - metabolism
Biodegradation, Environmental
Biofilm
Biofilms
Biological and medical sciences
Biological treatment of waters
Bioreactors
Biotechnology
Coloring Agents - metabolism
Degradation
Environment and pollution
Exact sciences and technology
Fundamental and applied biological sciences. Psychology
Indicators and Reagents - metabolism
Industrial applications and implications. Economical aspects
Industrial wastewaters
Pollution
Sulfanilic acid
Sulfanilic Acids - metabolism
Wastewaters
Water treatment and pollution
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Summary:Bacterial strains 1CX and SAD4i—previously isolated from the mixed liquor of a municipal sewage treatment plant—are capable of degrading the azo dye Acid Orange 7 (AO7) and sulfanilic acid, respectively. A rotating drum bioreactor (RDBR), operating under continuous flow and nutrient conditions designed to simulate the effluent from a dye manufacturing plant, was seeded with strains 1CX and SAD4i, forming a biofilm capable of degrading AO7 and sulfanilic acid. In addition, an RDBR containing a pre-existing biofilm capable of degrading AO7, but not sulfanilic acid, was seeded with strain SAD4i alone. Strain SAD4i was incorporated into the existing biofilm and degraded the sulfanilic acid resulting from the degradation of AO7 by indigenous members of the biofilm. The ability to seed a bioreactor with bacterial strains capable of degrading azo dyes, and resulting by-products, in a mixed microbial community suggests that this process could have commercial applications.
ISSN:0043-1354
1879-2448
DOI:10.1016/S0043-1354(03)00069-1