Process for purifying sulphide-containing waste water
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United States of America Patent
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Jun 10, 1997
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N/A
app pub date -
Nov 29, 1995
filing date -
Jun 10, 1993
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Abstract
A process for purifying waste water containing sulphide, comprises oxidizing the sulphide to elemental sulphur in a reactor with sulphide-oxidizing bacteria in the presence of oxygen, and separating from the waste water at least a part of the sulphur formed during the oxidation, while recycling a part of the elemental sulphur separated from the reactor effluent into the reactor in such a way that a concentration of elemental sulphur of at least 1 g/l is maintained in the reactor. The sulphur, in the form of aggregates, is used as a carrier material for the sulphide-oxidizing bacteria.
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