DESIGN OF EFFLUENT WATER TREATMENT SYSTEM FOR REUSE IN REFINERY OPERATIONS AT ATTOCK REFINERY LIMITED

Abstract

Effluent treatment plants are essential in industrial processes and environmental conservation, ensuring wastewater is safely discharged or reused. This project explores a multi-stage treatment process for industrial effluent to meet reuse standards set by the National Environmental Quality Standards. The main goals of this project include achieving compliance in pH control, reducing Biological Oxygen Demand and Chemical Oxygen Demand, and separating oil and other metals. The treatment process involves coagulation, dissolved air flotation, clarification, and reverse osmosis membrane filtration. Coagulation will destabilize suspended solids and colloids for removal, while DAF and clarification will eliminate any remaining solids. Finally, the RO membrane will separate dissolved contaminants, producing high-quality treated effluent suitable for industrial reuse. The findings will help develop a sustainable and cost-effective effluent treatment system for industrial applications.