FGD Pilot Success in the USA

June 4, 2019

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. By targeting the key concern – chlorides – this novel selective removal method provides an alternative to expensive complex treatments for discharge as explained in this brief video.

The pilot included a full scale Saltworks’ Flex EDR Selective Stack, which acts as a “chloride kidney.” Within the stack, Saltworks’ novel monovalent selective anion exchange membranes pull chlorides out of the FGD wastewater under a DC electric field. Outside of stack, a robotized plant enables the process while adjusting to variable water quality and providing valuable data to the operator. The results will be presented at future conferences or contact Saltworks (info@saltworkstech.com) to learn more.

Diagram of monovalent electrodialysis (mEDR) using Flex EDR technology
Stack Diagram of Flex EDR Selective
Inner View of Flex EDR Selective Pilot Plant

This work was made possible through collaboration with the U.S. Department of Energy (Award Number DE-FE0031678), the Electric Power Research Institute (EPRI) and Southern Company. Flex EDR technology was also developed with support from the National Research Council Canada’s Industrial Research Assistance Program (IRAP), BC Innovative Clean Energy Fund, Western Innovation (WINN) Initiative, and Sustainable Development Technology Canada (SDTC).

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About Saltworks

Saltworks Technologies is a leader in the development and delivery of solutions for industrial wastewater treatment and desalination. Founded in 2008, the Company offers thermal and membrane systems for brine concentration, zero liquid discharge, and advanced separations. By working with customers to understand their unique challenges and focusing on continuous innovation, Saltworks’ solutions provide best-in-class performance and reliability on challenging waters. From its headquarters in Richmond, BC, Canada, Saltworks designs, builds and operates full-scale treatment plants and offers comprehensive offsite and onsite testing services with its fleet of mobile pilots.

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