Advancing sustainable Water Reuse and Energy Eecovery for environmental protection

WABAG has successfully executed the design, engineering, installation, and commissioning of a new 200 MLD wastewater treatment plant as an extension (Phase III) of a treatment complex for the City of Al Kharj, Saudi Arabia. This state-of-the-art plant employs a comprehensive treatment approach, including mechanical and biological treatment, tertiary treatment with disc filters, and disinfection, ensuring that treated wastewater is suitable for agricultural irrigation.

The facility features an anaerobic sludge digestion system, facilitating biogas utilization for the production of green energy. This innovative solution significantly reduces the plant’s reliance on external power sources, making it predominantly energy-neutral and contributing to climate protection efforts.

Project Features:

• Scope: The scope of the Al Kharj Road III WWTP project includes engineering and design services, supply of mechanical equipment, and supervision of installation and commissioning. WABAG will also provide training for the client’s operational staff and may offer optional supervision of Operation and Maintenance for one year.
• Treatment Process:
  • Wastewater Treatment:
    • Mechanical/Biological Treatment:
    • Activated Sludge, Secondary Clarifier
    • Tertiary Treatment: Disc filters with disinfection
    • Waste Air Treatment
  • Sludge Treatment:
    • Sludge thickening
    • Anaerobic Sludge Treatment:
      • 4 digesters (8,525 m³ each)
      • Biogas utilization through Combined Heat and Power Plant ( CHPPs)
        • 2 x 1,400 kWh electrical generation
        • 2 x 1,700 kWh thermal generation
      • Energy recovery rate: 55%
    • Sludge dewatering
    • Storage in sludge silo
• Impact: The Al Kharj Road III WWTP represents a significant advancement in wastewater treatment technology in Saudi Arabia, ensuring sustainable water reuse for agricultural purposes. By implementing energy-efficient processes and focusing on biogas recovery, the plant not only meets the local water demand but also promotes environmental sustainability and climate protection.