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An Integrated Process for Biological Treatment of Sulfate-Containing Industrial Effluents

J. P. Maree, A. Gerber and E. Hill
Journal (Water Pollution Control Federation)
Vol. 59, No. 12 (Dec., 1987), pp. 1069-1074
Stable URL: http://www.jstor.org/stable/25043436
Page Count: 6
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An Integrated Process for Biological Treatment of Sulfate-Containing Industrial Effluents
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Abstract

During this investigation, upflow anaerobic, packed bed or upflow anaerobic, suspended sludge reactors were used. The biological process, where, following the addition of an organic carbon source such as molasses, converts sulphate to gaseous hydrogen sulphide. Hydrogen sulphide can be converted to elemental sulphur and heavy metals, which are normally present in mining effluents, are precipitated as insoluble metal sulphides and completely removed. Remaining hydrogen sulphide traces are aerobically reconverted to sulphate, while calcium carbonate crystallization and degradation of organic carbon residuals are achieved simultaneously. Cyanide in the effluent biodegrades. Any remaining weakly biodegradable components can be removed in a secondary anaerobic stage. Thus, this process produces reusable water and elemental sulphur.

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