The consortium of contractors Larsen & Toubro and Galfar al-Misnad, in association with Ashghal, is playing an integral role in solving Qatar’s sewage treatment issues.

The remit on the Doha South sewage treatment works phase 2 expansion included providing process design, detailed engineering design, procurement, construction and commissioning of the project.

The scope also included building three substations for Qatar General Electricity & Water Corporation (Kahramaa), six pump houses, a storm water lagoon, a treated sewage effluent (TSE) lagoon, and refurbishment and improvement works on the existing activated sludge plant, sequential batch reactors (SBRs) and six substations.

The state-of-the-art plant is run by programmable logic controllers, and supervisory control and data acquisition technology, with minimal human intervention.

The project is one of Doha’s two fully operational sewage treatment facilities, and has the capacity to treat 241 million litres a day of sewage, making it one of the largest treatment plants of its kind using SBRs combined with ultra-filtration in the region.

The plant is set among lush greenery and tall trees. Water is sent through the TSE network for use in horticulture and farming. There are also plans to use the water from the ultra-filtration plant for district cooling.