Kinetics of Chromium Reduction by Mixed Cultures during Growth Phase

Hexavalent chromium reduction kinetic parameters were estimated for several mixed cultures using molasses as the carbon source and nitrate as the terminal electron acceptor. Mixed cultures were enriched from diverse environmental sources, and kinetic parameter comparisons are made between the consor...

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Bibliographic Details
Published in:Water environment research 2000-09, Vol.72 (5), p.523-529
Main Authors: Schmieman, Eric A., Yonge, David R., Petersen, James N., Rege, Mahesh A., Apel, William A.
Format: Article
Language:English
Subjects:
Applied sciences
Bacteria
Biodegradation of pollutants
Biological and medical sciences
BIOLOGICAL KINETICS
Biomass
BIOREMEDIATION
Biotechnology
CHROMATE REDUCTION
Chromium
Cultural values
Decontamination. Miscellaneous
Earth sciences
Earth, ocean, space
Electrons
Engineering and environment geology. Geothermics
Environment and pollution
Exact sciences and technology
Fundamental and applied biological sciences. Psychology
GROUNDWATER
Groundwaters
IN SITU
Industrial applications and implications. Economical aspects
Kinetics
METAL
Microorganisms
Natural water pollution
Nitrates
Nitrites
Null hypothesis
Pollution
Pollution, environment geology
Research Papers
SOIL
Soil and sediments pollution
Soil water
Water treatment and pollution
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Summary:Hexavalent chromium reduction kinetic parameters were estimated for several mixed cultures using molasses as the carbon source and nitrate as the terminal electron acceptor. Mixed cultures were enriched from diverse environmental sources, and kinetic parameter comparisons are made between the consortia and a pure culture grown under the same conditions. A statistical analysis of the results indicated that some kinetic parameters exhibited significant differences, whereas others did not. It should be noted that those parameters with statistically significant differences were nonetheless numerically similar. Conservative values, therefore, could be assumed, or site-specific data obtained, for those parameters to design in situ bioremediation of chromium-contaminated sites.
ISSN:1061-4303
1554-7531
DOI:10.2175/106143000X138094