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Phenol degradation kinetics of an aerobic mixed culture

Paper ID Volume ID Publish Year Pages File Format Full-Text
4179 212 2009 5 PDF Available
Title
Phenol degradation kinetics of an aerobic mixed culture
Abstract

Biodegradation of 0.25–7.0 mmol l−1 phenol with a mixed bacterial consortium at a temperature of 25 ± 2 °C and a pH of 7.2 was studied in batch aerobic reactors. Substrate inhibition was calculated from experimental growth parameters using the Haldane equation. Kinetic parameters were derived by non-linear regression with a correlation factor (R2) of 0.987. The values for Haldane constants μmax, Ks and Ki were 0.3095 h−1, 0.7933 mmol l−1 and 6.887 mmol l−1, respectively. The value of Ki is one of the highest values obtained for mixed cultures degrading phenol under batch conditions. The yield factor (units A578 mmol−1 phenol) ranged from 0.10 to 0.16. The biokinetic parameters were used to predict the biodegradation profile, which agreed well with the experimental data. The results obtained from this study could be useful for an estimation of the relationship between growth rate and substrate utilization, which may be used to evaluate mass balance for a phenol containing wastewater treatment system involving mixed culture as the “biocatalysts”.

Keywords
Phenol; Aerobic degradation; Mixed culture; Batch process; Growth kinetics; Haldane model
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 46, Issue 2, 1 October 2009, Pages 205–209
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
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Price was $35.95
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