Largest Treatment Plant in Kingdom Goes Live

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Largest Treatment Plant in Kingdom Goes Live

NWC Has Completed the Largest Station in Riyadh's New Tri-generated Sewage System, Plans to Go Live End of November

The National water Company (NWC) has completed the largest station in Riyadh's new tri-generated sewage system, and has begun operational tests. Partial service will begin in late November, following the successful completion of trial operations to ensure optimum efficiency.

The project is an intrinsic element of NWC's strategy of sustainable environmental wealth and renewable energy management, and is the sixth station delivered in the new Riyadh sewage system. At a cost of SR400 million, the new system will be able to process 400,000 cubic meters of sewage water each day in normal periods, rising to 640,000 cubic meters at peak periods.

NWC has previously completed the first phase of pipe-laying, with a 25km network that can deliver up to 150,000 cubic meters of sewage water to the station each day. It is currently working on phase two: laying a further 38km of pipework at a cost of SR700 million. Approximately 60 percent of phase two has already been completed, enabling some 250,000 cubic meters of wastewater to be transported to the station each day.

The eco-friendly advanced stations being constructed across Riyadh will decrease the impact of sludge on the environment, and boost revenue through the sale of high quality sludge, as well as reducing operational costs by reducing the need for chemicals. Treated water from these plants conforms to international standards, and is suitable for industrial and agricultural use. Throughout this project, NWC has ensured that it has selected the best construction companies and suppliers, and has stipulated using renewable and stored energy to reduce the negative effects of gas emissions on the environment.

Key components of Riyadh's new treatment system include a main pumping station, systems to remove sand, grease and suspended oils, along with biological treatment, ventilation, final sedimentation, sludge pumping, filtration and sterilization, chlorine injection, and sludge drying units.

The new plant is also equipped with an odor absorption and treatment system (Anti-Odor System) using the latest technologies, and is integrated into NWC's SCADA automatic control system, though manual operations are also possible.

Source: NWC

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