The present study focused to evaluate the edible oil extraction and refining wastewater. Water samples were taken from each stage of wastewater treatment for analysis to evaluate the industrial wastewater quality and if can use it for agricultural irrigation. Results show that the removal of suspended solids was almost consistent and higher than that of BOD5 and COD. It was also affirmed that the removal of sulfates and phosphates from the wastewater was efficient. The physicochemical treatment processes significantly influence the relative biodegradability of the organic compounds in the wastewater. Hence, the effective treatment of edible oil refinery wastewater was about 10 to 100%, but the overall efficiency of wastewater treatment was 74%.

The efficiency of edible oil extraction and refinery wastewater treatment for the present study has less efficiency (concerning the chemical composition, there are some parameters stiles need to efficiently removed such as coliforms (contaminated with Escherichia coli). In the edible oil industry, water reuse is increasingly being considered to reduce fresh water consumption and to minimize treatment costs. The treated wastewater can be used for non-potable applications such as irrigation for agricultural purposes, if the treated water meets safety standards

To ensure the removal of most harmful components from the wastewater of the edible oil industry, we suggest adding a final stage in the treatment, which is the carbon filter. The carbon materials can be useful for removing the most hazard and pollutant materials in wastewater and increases the efficiency of wastewater treatment of edible oil wastewater.