In the exploiting,rdfining and processing of petroleum,large amount of oil
wastewater will be produced.It varied considerably in types,containing comples
polluting substances,hence rather difficult to be treated.Its physi-chemicaland bio-
chemical degradation processes are very complicated.Tomake a deep study and
discussion on the physi-chemical and bio-chemical degradation processes of
petroleum hydrocarbon and its derivatives is,therefore,of great signific...