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.
