Title

Polyhydroxyalkanoates form potentially a key aspect of aerobic phosphorus uptake in enhanced biological phosphorus removal

Authors

Authors

A. A. Randall;Y. H. Liu

Comments

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Abbreviated Journal Title

Water Res.

Keywords

enhanced biological phosphorus removal (EBPR); phosphorus accumulating; organisms (PAO); volatile fatty acids (VFAs); polyhydroxyalkanoates; (PHAs); biological nutrient removal (BNR); Engineering, Environmental; Environmental Sciences; Water Resources

Abstract

Eighteen anaerobic/aerobic batch experiments were conducted with a variety of volatile fatty acids (VFAs) on a sequencing batch reactor (SBR) population displaying enhanced biological phosphorus removal (EBPR). A statistically significant (P<0.01 for all variables) correlation between aerobic phosphorus uptake and polyhydroxyalkanoates (PHAs) quantity and form was observed. The results suggest that poly-3-hydroxy-butyrate (3HB) results in significantly higher aerobic phosphorus (P) uptake per unit mmoles as carbon (mmoles-C) than poly-3-hydroxy-valerate (3HV). The results showed that acetic and isovaleric acids resulted in higher P removals (relative to propionic and valeric acids) during EBPR batch experiments not because of higher PHAs quantity, but largely because the predominant type was 3HB rather than 3HV. In contrast propionic and valeric acids resulted in 3HV, and showed much lower aerobic P uptake per unit PHAs. (C) 2002 Elsevier Science Ltd. All rights reserved.

Journal Title

Water Research

Volume

36

Issue/Number

14

Publication Date

1-1-2002

Document Type

Article

Language

English

First Page

3473

Last Page

3478

WOS Identifier

WOS:000177846300006

ISSN

0043-1354

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