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Azo-dye conversion by means of Pseudomonas sp. OX1

Paper ID Volume ID Publish Year Pages File Format Full-Text
18647 42731 2007 7 PDF Available
Title
Azo-dye conversion by means of Pseudomonas sp. OX1
Abstract

The biodegradation of the monoazo-sulphonic dye Acid Orange 7 by means of Pseudomonas sp. OX1 was investigated. Conversion was carried out in both gas-sparged flasks and in internal loop airlift reactors under controlled operating conditions at dye concentration up to 0.8 g/L. Luria-Bertani or synthetic culture media were used. Bioremediation was accomplished by a sequence of aerobic and anaerobic phases. Cell growth took place only during the aerobic phase, while dye conversion occurred only during the anaerobic phase, according to a Michaelis–Menten-type kinetics. The maximum extent of decolorization was closely correlated with the amount of substrate carbon converted during the preceding aerobic phase; a limiting conversion of 70 mgdye per gram of substrate carbon was measured whatever the carbon source. The study was successfully pursued further to explore the potential of a decolorization process based on cyclic aerobic–anaerobic operation of an airlift bioreactor. Whatever the initial dye concentration, dye depletion was achieved provided that optimal cyclic aerobic–anaerobic operating conditions were selected.

Keywords
Azo-dye; Kinetics; Airlift; Pseudomonas sp. OX1
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Publisher
Database: Elsevier - ScienceDirect
Journal: Enzyme and Microbial Technology - Volume 41, Issue 5, 1 October 2007, Pages 646–652
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us