Siemens Water Technologies to supply system for treating flue gas desulphurization scrubber wastewater at three Mirant power plants
The Shaw Group, Inc., has selected Siemens Water Technologies to provide a system to treat wastewater from Flue Gas Desulfurization (FGD) scrubbers being constructed at Mirant Mid-Atlantic, LLC’s Dickerson and Morgantown Power Plants and Mirant Chalk Point, LLC’s Chalk Point Power Plant.
The system will remove suspended solids, heavy metals and organics from the scrubber waste stream so that the water can be safely discharged. Located inMaryland,U.S., the wastewater projects are scheduled to begin operation in 2010.
Scrubbers are used in U.S. power plants to meet emissions standards set by the U.S. Environmental Protection Agency (EPA). New regulatory programs call for further reduction of sulfur dioxide (SO2) emissions from coal-burning power plants. Flue gas systems frequently use limestone-forced-oxidation (LSFO) scrubbers to convert SO2 in the flue gas to gypsum, which can be sold for wallboard manufacturing, cement additive, or agricultural applications, thus turning a waste stream into a usable resource.
The proper design of wastewater treatment systems and the selection of materials of construction are critical. Both of these key items can have a major impact on the treatment plant's operation and reliability. Siemens Water Technologies will provide the new physical/chemical and biological wastewater treatment system on an equipment design-supply basis and provide start-up, training and commissioning services.
