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Competition between PolyP and non-PolyP bacteria in an enhanced phosphate removal system

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The competition between polyphosphate accumulating bacteria (PolyP bacteria) and a group of microorganisms not accumulating polyphosphate (tentatively named “G bacteria”) was observed in a laboratory sequencing batch reactor exhibiting enhanced biological phosphate removal (EBPR). The “G bacteria” were able to dominate the anaerobic-oxic system even though acetate was readily available. When acetate was used as the sole source of organic carbon, however, PolyP bacteria were able to compete successfully with “G bacteria.” The molar ratio of phosphate released to acetate taken up in the anaerobic stage varied from 0 to 0.78 and depended on the ratio of the numbers of PolyP bacteria to “G bacteria” in the activated sludge.

Keywords: enhanced biological phosphate removal; polyphosphate accumulating bacteria; sequencing batch reactor

Document Type: Research Article


Publication date: July 1, 1993

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  • 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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