WASTEWATER EFFLUENT TREATMENT PROGRAM FOR UTILIZATION IN INDUSTRY AS DEMIN WATER AND COOLING WATER

Abstract

Engro Polymers and Chemicals is currently treating the wastewater from its industrial processes to meet the NEQ limits. The effluent water is discharged to the Arabian Sea. However, water scarcity and environmental regulations demand effective recycling of this effluent water using green technologies so it can be utilized in one or more of the process on site. This project designs a new unit for the treatment of wastewater effluent for utilization as polished water. As Engro Polymers and Chemicals uses the on-site steam generation for plant operations and distribution to the nearby fertilizer plants, recovering the wastewater effluent as polished water can be of significant importance. The proposed design primarily uses membrane technology for water treatment along with a range of pre-treatment and secondary treatment facilities. By incorporating the principle of Zero Liquid Discharge (ZLD), the process recovers 100% of the effluent as polished water or cooling water. Finally, HAZOP study and economic analysis of the proposed solution is done to identify cost effectiveness and health and safety hazards involved.