| 摘要 |
The invention provides a method for removing sulphur compounds from water which contains low levels of organic matter, by anaerobic reduction of the sulphur compounds to sulphide, followed by partial oxidation of the sulphide to elementary sul- phur. The cost-increasing consumption of electron donor (nutrient) during th e anaerobic reduction is lowered by one or more of the following measures: a1) keeping the sulphate concentration in the anaerobic effluent at at least 500 mg/l; a2) keeping the sul- phite concentration in the anaerobic effluent at at least 100 mg/l; b) keepi ng the salt concentration, expressed in sodium ion equivalents, in the anaerobic medium of at least 3 g/l; c) keeping the sulphide concentration in the anaerobic influent at at least 100 mg/l; d) introducing an inhibitor into the anaerobic treatment medium, which inhibitor is more toxic to the methane-produ- cing bacteria than to incompletely oxidising sulphate-reducing bacteria or sulphate-reducing bacteria oxidising compounds hav- ing one carbon atom. |
