Process for treating waste water effluent having odours

摘要

A waste water effluent having odours from a chemical apparatus, which contains hydrogen sulfide, mercaptanes and other sulfur compounds, is allowed to come in contact with a hydrocarbon oil having a molecular weight preferably of 100 - 300 such as kerosene in a preferable mixing ratio of the hydrocarbon oil to the waste water effluent of 10 - 1:1 by volume thereby to extract and transfer the sulfur compounds into the hydrocarbon oil, separating the mixture into the oil and the water by settlement, and using the separated water in a second contact with another hydrocarbon oil or with crude oil or the like in a desalting means or in a gas scrubbing means, while feeding the separated oil in a hydrogenation-desulfurizing means to recover the absorbed sulfur compounds as hydrogen sulfide.