DOHA, Qatar - The Doha North Sewage Treatment Works (DNSTW) has started receiving sewage from the main pumping station in Northern Doha located in Al Kheesa.
After the facility became operational in December 2015, sewage flows are estimated at 46,000 m3/day.
The project is the first in Qatar to use ultraviolet (UV) and ultrafiltration (UF) technology to help clean up the wastewater to be reused for irrigation purposes.
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/day, serving a projected population of over 900,000 people by the year 2020.
The second phase of the project includes the construction of a Thermal Drying Plant (TDP) to receive and treat sludge generated from not just Doha North STW but also from all the other sewage treatment works within Qatar.
Public works authority Ashghal said the construction of the TDP is “substantially completed and is currently going through final commissioning”.
The TDP includes four thermal dryers currently being tested using sludge generated at the Doha North STW and the Doha West STW. Two of the thermal dryers are expected to be handed over in Q2 of 2016, while the other two are expected to be handed over in Q3 of 2016.
The Doha North Sewage Treatment Works project is worth approximately 3.63 billion Qatari Riyals (US$988.6m), including the Design and Build contract, which is worth approximately 2.49 billion Qatari Riyals (US$683.8), and the Operate and Maintainance 10-year contract which is worth approximately 1.14 billion (US$31.3m) Qatari Riyals.
The project contracts were awarded to Keppel Seghers Engineering Singapore on a design-build-operate (DBO) basis, and it is expected to be completed in Q3 of 2017.
The DNSTW is Keppel Seghers' second major project in Qatar, having also designed, built and handed over the Domestic Solid Waste Management Centre (DSWMC) in October 2011 and entered into the 20-year operations and maintenance phase of the contract.
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