Arsenite Oxidation by Alcaligenes Faecalis Strain O1201 in a Continuous-Flow Bioreactor
Publication: Journal of Environmental Engineering
Volume 133, Issue 5
Abstract
oxidation by a pure bacterial culture, Alcaligenes faecalis strain O1201, was evaluated using a continuous stirred tank reactor. The bioreactor system was operated for 204 days under a wide range of influent concentrations and hydraulic retention times with citrate as the sole carbon and energy source at pH 7 and 30°C. Nine steady-state conditions were obtained with oxidation efficiency exceeding 95%. The system quickly recovered from an overloading at while it operated at a HRT of . A material balance analysis revealed that nearly all the removed in the continuous stirred tank reactor (CSTR) was oxidized to and only 3.2% of the fed to the CSTR was unaccounted for. Biokinetic parameters, cell dry weight/h and , for oxidation were obtained using the Monod expression and data obtained at steady-state conditions.
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Acknowledgments
This research was supported by a Kentucky Science and Engineering Foundation Exploratory Research grant awarded to Yi-Tin Wang under Agreement No. UNSPECIFIEDKSEF-148-502-03-71.
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© 2007 ASCE.
History
Received: Jul 6, 2006
Accepted: Sep 18, 2006
Published online: May 1, 2007
Published in print: May 2007
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