“…Due to the low solubility of oil in water efficiency of aqueous extraction is lower compared to hexane extraction. A de-emulsification step is required to separate the oil and an aqueous effluent is produced which requires further treatment (Hanmoungjai, Pyle, & Niranjan, 2000;Amarasinghe, Kumarasiri, & Gangodavilage, 2009). Therefore, determination of optimum operating conditions for aqueous extraction is important.…”