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Biological sulfide prestripping for metal and COD removal

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Organic wastes of high concentration and containing high concentrations of metals have generally been treated by a preliminary metal removal process (for example, precipitation) followed by biological treatment of the degradable component of the organic matter. It was the objective of this study to determine if a high strength waste containing metals could be treated by a precipitation-anaerobic digestion process in which the precipitant was sulfide generated by the digestion step itself. To answer these questions, laboratory reactors were fed a synthetic medium (containing copper as the metal of interest and glucose and acetate as primary organic substrates) and operated in a semicontinuous draw and fill manner. Overall, the results of this study are encouraging and point to the potential feasibility of the process.

Keywords: anaerobic digestion; heavy metals; precipitation; sulfide

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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