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

    Authors

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

    Comments

    Authors: contact us about adding a copy of your work at STARS@ucf.edu

    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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