عنوان مقاله [English]
The objective of this study was to evaluate the feasibility of treating desalting plant wastewater to meet the applicable discharge limits and injection to well standard consistently using membrane processes to reduce the risk of clogging of the injection well. The effluent of sand filtration unit from Aghajari Maroon 2 was used as a feed. A pilot scale hybrid membrane unit consisting of a spun polypropylene 0.45 µ pore size microfilter and a hollow fiber polypropylene 0.1 to 0.01 µ pore size ultrafilter membrane was used in this study. Trials on different membrane fluxes were conducted for three processes, namely microfiltration, ultrafiltration and hybrid micro and ultrafiltration. Results have shown that the optimal values for flow rate and flux were 32 L/MIN and 120 LMH, respectively. The average values for percentage removal of turbidity, oil and grease, TSS and particle size were 98.53, 98.81, 98.23 and 99.93, respectively. The results showed that the quality of the product consistently met the requirement for injection to well. It was concluded that it is feasible to treat the wastewater using micro and ultra filter.