Posted on May 09, 2016

H.E Mr. Mohammed bin Abdullah Al-Rumaihi (pictured), Minister of Municipality and Environment visited on Monday 9 May 2016, the Doha North Sewage Treatment Plant. H.E. the Minister was accompanied by Eng. Jalal Yousef Al Salhi, Director of Infrastructure Affairs in Ashghal and a group of managers and officials from Ashghal’s infrastructure affairs and assets affairs.

During the site visit, H.E. the Minister was briefed on the project and the progress its making, the engineering and construction techniques used in its implementation, the components and advantages of the new treatment plant and the thermal drying plant, the plants' advanced systems, and finally the current works being implemented.

The Doha North Sewage Treatment Works (STW) is one of the most prominent treatment plants. It uses advanced treatment techniques such as ultrafiltration and ultra-violet technologies to produce high quality treated water which can be used in irrigation. The Doha North STW is located in Umm Slal Ali, 25 km to the North of Doha. The first phase of the project includes the construction of the main treatment plant for the reception and treatment of sewage, which has been designed to treat up to 245,000 m3 of sewage per day, serving a projected population of over 900,000 people by the year 2020.

The modern facility features advanced biological treatment processes as well as ultrafiltration, which is an ultra-membrane filtration technique that separates large molecules and small granules from the water. The plant also uses ultra-violet technologies for wastewater treatment. It is worth mentioning that the STW started receiving sewage flows from the main pumping station in Northern Doha (PS70) located in Al Kheesa. The sewage flows are estimated 46,000 m3 per day. The Doha North STW became fully operational in December 2015, after completing all of the inspection and testing processes by the Qatari Civil Defence and other entities.

The second phase of the project includes the construction of a Thermal Drying Plant (TDP) within the Doha North STW to processes sludge, which is the solid materials generated from the sewage treatment process, in order to dispose them according to international standards for safe disposal. The TDP will receive and treat sludge generated from not just Doha North STW but also from all the other sewage treatment works within Qatar. The sludge is dewatered, processed through the thermal dryers to finally produce dried pellets.

The construction of the TDP is substantially completed and is currently going through final commissioning. The TDP includes four thermal dryers which are currently being tested utilising sludge generated at the Doha North STW and the Doha West STW. The Doha North STW is the first facility with comprehensive odour control system to minimise the impact on the surrounding environment. The Buffer Zone surrounding the STW will be carefully landscaped to form a lush-green oasis that includes approximately 95,000 trees and 50 picnic areas with interconnecting roads and a bird watching lagoon. The roads, picnic areas and bird watching Lagoon are under construction and the remaining irrigation pipe work and planting are in progress as well as the construction of artificial mounds across the area.

The Doha North Sewage Treatment Plant Project is worth approximately 3.63 billion Qatari Riyals, including the Design and Build contract, which is worth approximately 2.49 billion Qatari Riyals, and the Operate and Maintain 10-year contract which is worth approximately 1.14 billion Qatari Riyals. The project contracts were awarded to Keppel Seghers Engineering Singapore LTD.

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