Dissolved Oxygen-Stat Titration Respirometry: Principle of Operation and Validation
Publication: Journal of Environmental Engineering
Volume 129, Issue 7
Abstract
A method is presented to assess oxygen uptake rates which operates at constant dissolved oxygen concentration (DO). This method involves DO-stat titrations by controlled addition of a diluted solution to a batch volume of activated sludge. The titrant flow rate is proportional to the biomass respiration rate, while the mass of added is proportional to the oxidized organics. Classical batch respirometries (with and without gas flow, i.e., “open” and “closed”) were compared to the DO-stat technique using first as reducing chemical and then respiring aerobic biomass. An excellent correlation was found among estimates of oxygen consumption rate and short term yield coefficient by the three techniques. Inhibition by was found to be negligible for biomass concentration as volatile suspended solids of g /L.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 129 • Issue 7 • July 2003
Pages: 602 - 609
Copyright
Copyright © 2003 American Society of Civil Engineers.
History
Received: Dec 4, 2001
Accepted: Sep 13, 2002
Published online: Jun 13, 2003
Published in print: Jul 2003
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