Doha: The Public Works Authority 'Ashghal' continues to implement the Treated Sewage Effluent Transmission Main and Pumping Station (D-Line) project, which will transfer treated wastewater from the Doha South Sewage Treatment Works in Nuaija area to the Seasonal Storage Lagoons, with the aim of balancing the deficit and surplus of the treated sewage water and achieving its optimal use. Eng. Abdulrahman Mohammed Al Sulaiti, Head of Treatment Plants Projects and Treated Water Networks Section in the Drainage Networks Projects Department at Ashghal, stated that the project is part of the Authority's efforts to benefit from treated wastewater and encourage efficient and sustainable consumption of water resources, in line with the sustainable development objectives and the Qatar National Environment and Climate Change Strategy, which includes reusing 100 percent of treated wastewater by 2030. Eng. Al Sulaiti added that Ashghal pays great attention to reusing treated wastewater as part of its efforts to preserve the environment, noting that this project will pump approximately 22.5 million cubic metres of treated wastewater annually. For his part, Eng. Walid Al Ghoul, Project Manager at Ashghal's Drainage Networks Projects Department, said that the project will balance the deficit and surplus of treated wastewater (TSE) by storing the surplus during winter months to be reused during the summer when demand for TSE is high to supply feed farms with irrigation water, and thus reducing the use of groundwater. Eng. Walid Al Ghoul explained that the D-Line also aims to supply the Ghadeer Feed Farms with irrigation water during the summer, and will meet the expected future demands of additional feed farms such as Hassad farms in Al Rakhiya, among others. The TSE Pumping Station and Transmission Main (D-Line) project consists of a 65 km-long TSE transmission pipeline that runs at a depth of approximately 2.5 to 5.5 metres underground, starting at the existing Doha South Sewage Treatment Works (STW) and to be laid along the main service route of Salwa Road, passing through the Rakhiya farms and surrounding areas and up to the TSE Storage Lagoons where excess treated wastewater is stored. The project also includes the construction of a pumping station with a capacity of 120,000 cubic metres/day which will pump the TSE flow from the Doha South STW to the seasonal storage lagoons. This is in addition to the mechanical, electrical and related equipment works. It is worth noting that the treated sewage transmission pipelines are equipped with advanced automation technology and systems for monitoring, controlling, and leak detection. It is worth noting that the TSE Pumping Station and Transmission Main (D-Line) project comes in line with Qatar's objectives in the field of environmental sustainability and its efforts to preserve the environment and water resources for future generations, as part of the Third National Development Strategy 2024-2030. It is noteworthy that Qatar has achieved remarkable success in the field of wate r recycling, as 99.7 percent of sewage water was treated in 2021, which is used to irrigate green public spaces in the country and many other uses. Source: Qatar News Agency