Comparative Experimental Research on Oily Wastewater Treatment by Hydrocyclones in Series

Oily wastewater treating technologies of tertiary oil recovery in oil-fields are introduced first. The technological process and the main test contents of wastewater treatment are described. Oily wastewater was treated advanced by multi-type hydro-cyclones in two stage series. The hydro-cyclone type per stage, combination mode and operation parameter in two stage series are determined by separation efficiency. The experimental results show that the highest efficiency can reach up to 94%.