Client
DANGOTE Oil Refining Company Ltd (DORC), Nigeria
Location
Lekki Free Zone, Nigeria
Capacity
110,040 m3/d
Total Water Management System for Africa’s Largest Oil Refinery
WABAG delivered a full-cycle water treatment and recycling solution for the 650,000 BPSD Dangote Refinery and Petrochemical Complex at Lekki, Nigeria. The facility integrates raw water treatment, condensate polishing and industrial effluent recycling in one unified system, ensuring uninterrupted industrial water supply while reducing freshwater dependency.
Multistage Treatment System Delivering High-Quality Industrial Water
The refinery’s water management solution features advanced WABAG technologies including SBR, MARAPUR-MBR®, UF, RO and BIOPUR®, ensuring high-purity industrial water for boiler and process requirements. Cooling tower and boiler blowdown streams are further polished via an RO-based demineralization system for sustainable reuse.
Effluent Treatment and Recycling for Resource Optimization
The industrial effluent generated from refining operations is treated through physical, chemical and biological processes and then recycled, converting wastewater into a dependable source of demineralized water. This circular model reduces freshwater consumption and enhances long-term operational resilience for the refinery.
Driving Economic and Environmental Impact for the Oil & Gas Sector
By producing sustainable industrial water onsite and deploying a robust sludge and oily-waste treatment process, the solution minimizes environmental load while supporting refinery uptime. The system recovers 26.5 MLD of high-quality DM water every day, reinforcing both economic efficiency and environmental stewardship.
Scope of the Project
Design, engineering, procurement and supply, installation supervision, commissioning and testing of:
- Raw water intake and raw water treatment
- Demineralisation and condensate polishing unit
- Effluent treatment and recycling plant
Advanced Treatment Process
The multistage treatment train includes:
- SBR for RWTP
- API, CPI & DAF
- Biotower
- MARAPUR-MBR® – Membrane Bioreactor
- Ultrafiltration
- Reverse Osmosis
- BIOPUR® – Biofiltration
- Dual media filtration
- High-temperature wet air oxidation
- Bioremediation for oily sludge
- Thermal oxidiser for off-gas treatment
- Sludge thickening and dewatering
Environmental & Operational Impact
The integrated water treatment system ensures a continuous supply of high-purity industrial water for refinery operations, with 26.5 MLD of treated effluent being reused as demineralized water to meet process needs. By minimizing freshwater withdrawal and reducing wastewater discharge, the project significantly improves the refinery’s environmental footprint while supporting resource efficiency. The solution also contributes to economic growth and long-term sustainability for one of Africa’s largest industrial complexes, reinforcing the value of circular water management in the Oil & Gas sector.