method for the treatment of erdolhaltigen, especially from a erdolraffinerieabsitzvorrichtung coming abwassern

摘要

1449342 Purifying water BRITISH PETROLEUM CO Ltd 18 Dec 1974 [3 Jan 1974] 00264/74 Heading C1C A method for treating effluent water containing oil to reduce the oil content comprises passing the effluent water firstlythrough a sand filter and subsequently through a biological percolating filter.