Dubai Municipality inaugurates UAE’s largest STP built by L&T

The Dubai Municipality has inaugurated Phase II of the Jebel Ali sewage treatment plant (STP) in the United Arab Emirates (UAE). With a capacity of 375,000 cubic metres per day, it is the largest STP in the country. Phase I of the STP has a sewage treatment capacity of 300,000 cubic metres per day.

The STP has been constructed by Larsen & Toubro (L&T) in a joint venture with the BESIX Group. It was completed and delivered ahead of schedule while maintaining the highest standards of safety and quality.

The STP has been constructed in the build-test-commission-operate-maintain mode. It features primary, secondary and tertiary treatment processing units such as screening, grit separation and removal; primary sedimentation through a flight and scrapper mechanism; biological reactors; final settlement through a bridge and scrapper mechanism; tertiary filtration through gravity filters; UV disinfection; and chlorination. The sludge treatment process includes sludge thickening through rotary drums and belt thickeners, anaerobic digestion, dewatering through centrifuge, sludge drying through thermal paddle dryer facilities and a robotic bagging system. The scope of works also includes odour control facilities, interconnection and upgradation works for Phase I STP, effluent pump stations, effluent reservoirs and biological reactors.

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