Saltworks is honoured to receive POWER Magazine’s 2020 Water Award for our ground-breaking ‘chloride kidney’ industrial desalination solution. This innovative technology—pilot tested at one of America’s largest coal power plants—involves a novel tweak on 50 year-old electrodialysis desalination technology.
As the world transitions its energy mix, coal-fired stations still provide over 30% of America’s electricity and 60% of China’s. Operators have installed scrubbers to remove sulfur emissions from the exhaust, driven by the need to mitigate air pollution and prevent acid rain. The air emissions are absorbed into water, ultimately generating a unique Flue Gas Desulfurization (FGD) wastewater.
Until now, FGD wastewater has not been widely treated due to its complex chemistry and highly scaling nature. FGD wastewater treatment can be avoided by re-using the water internally. However, this requires removing chlorides.
Saltworks developed a solution that removes up to 90% of chlorides from FGD wastewater, meaning that the water can be re-used rather than discharged. The solution uses Saltworks’ FlexEDR product—with proprietary monovalent-selective membranes—enabling up to 50% cost savings over alternative methods.
The same technology is now being tested by a major international mining company to remove chlorides and boost production from what would normally be a waste product. More information can be accessed by contacting Saltworks or visiting POWER magazine.
In addition to chloride removal for re-use, Saltworks also offers chemical softening, high recovery reverse osmosis, and evaporator solutions for FGD wastewater.
The site pilot work—proving the performance of FlexEDR as a chloride kidney—was made possible thanks to the foresight of the Electric Power Research Institute (EPRI) and the support of the Department of Energy’s National Energy Technology Laboratory, as well as advisory services and research and development funding from the National Research Council of Canada Industrial Research Assistance Program (NRC-IRAP).
Saltworks welcomes a new report by the Electric Power Research Institute (EPRI) summarizing results from a pilot completed at a large coal power plant in the US. FlexEDR monovalent electrodialysis reversal treated FGD wastewater, recovering 93% freshwater.
Saltworks successfully concluded a 60-day on site pilot at a major US coal fired power plant with 100% up-time. The project treated challenging flue gas desulfurization (FGD) wastewater to selectively remove chlorides for recycle and re-use internal to the coal stack scrubber system.
Saltworks completed an off-site FlexEDR Selective pilot test to treat flue gas desulfurization (FGD) wastewater from a coal fired power plant in China. The objective was to reduce chlorides such that the FGD wastewater could be internally recycled and final treatment costs reduced notably.
Flue gas desulfurization (FGD) systems are used to remove sulfur dioxide air emissions in coal-fired power plants. FGD wastewater is often saturated with calcium sulfate, while containing both metals and chlorides. Saltworks can help to boost FGD water cycles through selective chloride removal, or treat the FGD wastewater to zero liquid discharge.