| 摘要 |
<p>PCT No. PCT/NL93/00107 Sec. 371 Date Nov. 18, 1994 Sec. 102(e) Date Nov. 18, 1994 PCT Filed May 26, 1993 PCT Pub. No. WO93/24416 PCT Pub. Date Dec. 9, 1993.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 sulphur. The cost-increasing consumption of electron donor (nutrient) during the 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 sulphite concentration in the anaerobic effluent at at least 100 mg/l; b) keeping the salt concentration, expressed in sodium ion equivalents, in the anaerobic medium at 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-producing bacteria than to incompletely oxidizing sulphate-reducing bacteria or sulphate-reducing bacteria oxidizing compounds having one carbon atom.</p> |
