Journal
WATER RESEARCH
Volume 37, Issue 11, Pages 2757-2763Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0043-1354(03)00069-1
Keywords
biofilm; aerobic; Acid Orange 7; degradation; sulfanilic acid
Funding
- PHPPO CDC HHS [PH2 ES 04908] Funding Source: Medline
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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. (C) 2003 Elsevier Science Ltd. All rights reserved.
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