Treatment of Oil Wastewater Containing High Salinity with Ultraf?ltrat?on (UF) and Reverse Osmos?s (RO)

Abstract

Delia Teresa Sponza

The high salinity oil wastewaters contained high salt, chloride, total hydrocarbon concentrations with COD and TSS . In order to treat this wastewater a sequential UF and RO ractor system was used. Before membrane treatment the oil was floated with an API oil separator. The effects of increasing fluxes ( 12 L/h, 30 L/h and 50 l /h) and pressures (4 bar , 8 bar and 16 bar ) on the removals of pollutant parametres were studied in the UF. The influence of the main operating parameters suh as operating pressure (15, 35 and 50 bar), temperature (25, 40 and 55 °C) and feed flowrate (7, 14, 28 L/min, were studied in RO. The maximum salt , chloride, total hydrocarbon, COD,dis-COD, and TSS yields were 90%, 91%, 89%, 89%, 89% and 90%, respectively, at a flux of 60 L/m2.h and at a pressure of 16 bar in UF, respectively. The maximum RO yields in the permeate were around 99% for the pollutant parameters given above at afed flowrate of 28 L/min at 24 bar pressure.

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