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Title: Response of poly-phosphate accumulating organisms to free nitrous acid inhibition under anoxic and aerobic conditions
Authors: Zhou, Yan
Ganda, Lily
Lim, Melvin
Yuan, Zhiguo
Ng, Wun Jern
Issue Date: 2012
Source: Zhou, Y., Ganda, L., Lim, M., Yuan, Z.,& Ng, W. J. (2012). Response of poly-phosphate accumulating organisms to free nitrous acid inhibition under anoxic and aerobic conditions. Bioresource Technology, 116, 340-347.
Series/Report no.: Bioresource technology
Abstract: The response of free nitrous acid (FNA)-adapted poly-phosphate accumulating organisms (PAOs) to FNA inhibition under aerobic and anoxic conditions was studied. Anoxic P-uptake was 1–6 times more sensitive to the inhibition compared to aerobic P-uptake. The aerobic nitrite reduction rate increased with FNA concentration, accompanied by an equivalent decrease in the oxygen uptake rate, suggesting under high FNA concentration conditions, electrons were channeled to nitrite reduction from oxygen reduction. In contrast, the nitrite reduction rate decreased with increased FNA concentration under anoxic conditions. Anaerobic metabolism of PAO under both anoxic and aerobic conditions was observed at high FNA concentrations. Growth of PAOs decreased sharply with FNA concentration and stopped completely at FNA concentration of 10 μg HNO2–N/L. This study, for the first time, investigated the function of nitrite/FNA in an aerobic denitrifying phosphate removal process by evaluating electron as well as energy balances, and provides explanation for FNA inhibition mechanisms.
ISSN: 0960-8524
DOI: 10.1016/j.biortech.2012.03.111
Rights: © 2012 Elsevier Ltd. This is the author created version of a work that has been peer reviewed and accepted for publication by Bioresource technology, Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:NEWRI Journal Articles

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