Title

Polyhydroxyalkanoate form and polyphosphate regulation: keys to biological phosphorus and glycogen transformations?

Authors

Authors

A. A. Randall; Y. Chen; Y. H. Liu;T. McCue

Comments

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Abbreviated Journal Title

Water Sci. Technol.

Keywords

phosphorus; polyhydroxyalkanoate; wastewater; ANAEROBIC METABOLISM; REMOVAL SYSTEMS; FATTY-ACIDS; MODEL; STOICHIOMETRY; BIOMASS; Engineering, Environmental; Environmental Sciences; Water Resources

Abstract

Experimental studies with both synthetic and real domestic wastewater showed that poly-3-hydroxy-butyrate (3HB) and poly-3-hydroxy-valerate (3HV) formed in direct proportion to the acetate/propionate (Ace/Pro) ratio of the influent wastewater during Enhanced Biological Phosphorus Removal (EBPR). Acetic acid resulted in higher anaerobic phosphorus (P) release, polyhydroxyalkanoate (PHA) yield, 3HB content, and glycogen (CH) degradation. Linear regression showed that anaerobic P release (P(rel)) and CH degradation (CH(deg)) were both a function of Ace-->3HB, but not of Pro-->3HV. Aerobic P uptake (P(up)) correlated best with preceding P(rel) rather than PHA (but note P(rel) correlated with Ace-->3HB). Aerobic CH formation (CHform) correlated best with CHdeg and 3HB. The results imply the acetate/propionate content of influent has a major influence on PHA, CH, and P transformations. Short-term increases in acetic or propionic acid increased P(rel), but were always offset by corresponding changes in P(up) to yield the same net P removal as the control reactor. Thus net P removal, and EBPR process performance, was probably a function of the population selected (i.e. XPAO fraction) during long-term cultivation.

Journal Title

Water Science and Technology

Volume

47

Issue/Number

11

Publication Date

1-1-2003

Document Type

Article; Proceedings Paper

Language

English

First Page

227

Last Page

233

WOS Identifier

WOS:000184595400031

ISSN

0273-1223

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