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Enhanced Biological Phosphorus Removal from Wastewater by Biomass with Different Phosphorus Contents, Part I: Experimental Results and Comparison with Metabolic Models

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Enhanced biological phosphorus removal (EBPR) in wastewater treatment involves at least two types of bacterial metabolism: a polyphosphate-accumulating metabolism (PAM) and a glycogen-accumulating metabolism (GAM). Laboratory-scale sequencing batch reactors operated in an anaerobic–aerobic cycle confirmed that low influent phosphorus/chemical oxygen demand (COD) ratio feed favored a GAM-dominated culture and high influent phosphorus/COD ratio feed favored a PAM-dominated culture, as indicated by changes in phosphorus, acetate, glycogen, and polyhydroxyalkanoate (PHA) concentrations during the anaerobic phase. Differential PAM and GAM dominance may explain variance in anaerobic phosphorus release, glycogen degradation, and PHA synthesis per acetate uptake ratios previously reported in EBPR systems and proposed metabolic models. The measurement of the ratios of anaerobic phosphorus release to acetate uptake and glycogen degradation to acetate uptake is suggested as an assay to estimate the relative dominance of PAM and GAM, respectively, in EBPR cultures.
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Keywords: ACTIVATED SLUDGE; BACTERIAL STORAGE PRODUCTS; ENHANCED BIOLOGICAL PHOSPHORUS REMOVAL; GLYCOGEN; POLYPHOSPHATE

Document Type: Research Article

Publication date: 2003-11-01

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  • Water Environment Research (WER) is published monthly, including an annual Literature Review. A subscription to WER includes access to the latest content back to 1992, as well as access to fast track articles. An individual subscription is valid for 12 months from month of purchase.

    Water Environment Research (WER) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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