PROCESS FOR TREATING ORGANICALLY POLLUTED WATER

摘要

of the disclosure: Process for treating organically polluted water, e.g. for the purpose of producing drinking water, the raw water being intensively mixed in an ozone treatment unit (2) with ozone and then being passed through a filter (4) built up from different layers. To optimize the film of microorganisms which develops in the filter, sulfur is added between the ozone treatment unit (2) and the filter (4) in the form of a compound available for assimilation by microorganisms, e.g. in the form of a sulfide. The filter (4) is preferably composed of an upper layer of filtering charcoal and a layer of fine sand beneath this. Assimilable sulfur compounds which are suitable are preferably an aqueous sodium sulfide solution (8) or else hydrogen sulfide, sodium sulfite, or sodium thiosulfate. An ozone treatment at the conclusion of the process ensures that any traces of bioavailable sulfur are oxidized into the sulfate form.