Abstract | One of the major compliance hurdles introduced by the recently finalized Effluent Limitations Guidelines (ELGs) is the treatment of Flue Gas Desulfurization (FGD) wastewater. FGD wastewater flow and quality vary from station to station. Treatment to achieve ELG compliance often requires a unique and customized solution to reduce cost, schedule, and equipment footprint. This white paper, authored by David Weakley II, PE, Assistant Engineering Manager at GAI Consultants, outlines seven steps to serve as a starting point for stations gearing up for ELG compliance for FGD wastewater. The steps include creating and verifying a station water balance; understanding the existing FGD wastewater system; identifying and evaluating constituents of concern; evaluating FGD treatment options; assessing applicable technologies through pilot testing; selecting a treatment technology; and developing delivery documents, including all applicable permits, drawings, and specifications.


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