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The effect of free nitrous acid on key anaerobic processes in enhanced biological phosphorus removal systems

descriptionPublicationkeyboard_double_arrow_right Article , Journal 01 Feb 2013 Australia Publisher:Elsevier BVJournal:Bioresource Technology, volume 130, pages 382-389 (issn: 0960-8524,

Authors:

Liu Ye;

Zhiguo Yuan;

Maite Pijuan; Maite Pijuan;

doi: 10.1016/j.biortech.2012.11.127

pmid: 23313766

The effect of free nitrous acid on key anaerobic processes in enhanced biological phosphorus removal systems

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Abstract

In this study, the effect of nitrite/FNA on the anaerobic metabolism of polyphosphate accumulating organisms (PAOs) and glycogen accumulating organisms (GAOs) is investigated. The results clearly show that FNA has a detrimental effect on the acetate uptake rate by both PAOs and GAOs, but this adverse effect is much stronger on PAOs than on GAOs. Also, when FNA was increased, phosphate release to acetate uptake ratio by PAOs increased substantially (250-300% compared to control), which was accompanied by decreases (40-60%) in glycogen degradation and PHA production to VFA uptake. In contrast, these ratios for GAOs remained constant or increased slightly towards the highest FNA concentration applied. These results indicate that the anaerobic metabolism of PAOs is more adversely affected than that of GAOs when FNA is present. This might provide a competitive advantage to GAOs over PAOs in enhanced biological phosphorus removal systems when nitrite is present.

Country

Australia

Related Organizations

University of Queensland
Australia
Catalan Institute for Water Research
Spain
FUNDACIO INSTITUT CATALA DE RECERCA DE L'AIGUA
Spain
FUNDACIO INSTITUT CATALA DE RECERCA DE L'AIGUA
Spain

Keywords

Glycogen accumulating organisms, Polymers, Nitrous Acid, Anaerobic metabolism, Acetates, Bacteria, Anaerobic, Glycogen-Accumulating Organisms, Bioreactors, 2305 Environmental Engineering, Waste Management, Polyphosphates, Anaerobiosis, Biomass, Free nitrous acid, Polyphosphate accumulating organisms, 1502 Bioengineering, Phosphorus, 2311 Waste Management and Disposal, Enhanced biological phosphorus removal, Glycogen

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	citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	23
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