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Retention of Sulfate-Reducing Bacteria in Expanded Granular-Sludge-Blanket Reactors

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In acetate-fed, expanded granular-sludge-blanket reactors with a liquid upflow velocity between 3.5 and 4.5 m/h and pH 8.0 to 8.5, calcium-containing tap water tended to select for sulfate-reducing bacteria, whereas demineralized tap water promoted methane production. In a formate-fed, sulfate-reducing, expanded granular-sludge-blanket reactor operated at pH 8.25 to 8.65, maximum sulfate removal rate was 9.5 g sulfur/L·d at the slowest liquid upflow velocity tested (3.0 m/h). The latter was only possible if methane-producing bacteria were repressed by two consecutive doses of 3.85 g/L 2-bromo-ethane sulfonate. These laboratory-scale experiments confirm the presumed limited capacity of sulfate-reducing bacteria to multiply to high biomass densities in upflow reactor systems.
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Document Type: Research Article

Publication date: 1999-07-01

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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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