Report by EPRI Illustrates Heartland Concentrator as FGD Wastewater ZLD Solution
Using thermal evaporation, reduce the volume of wastewater with the Heartland Concentrator.
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The technical report by the Electric Power Research Institute (EPRI) on the feasibility of using an adiabatic evaporator for flue gas desulfurization (FGD) wastewater treatment focuses on addressing new stringent effluent guidelines proposed by the EPA. These guidelines set lower maximum contaminant levels for pollutants typically found in FGD wastewater.
Key report takeaways include:
Regulatory Context: The EPA’s impending regulations necessitate advanced wastewater treatment solutions to meet the lower contaminant thresholds.
Technology Focus: The report evaluates the Heartland LM-HT adiabatic evaporator as a potential solution for achieving zero liquid discharge (ZLD) in FGD wastewater treatment, utilizing flue gas heat as the energy source.
Demonstration and Results: A pilot test processed approximately 10,000 gallons of FGD wastewater over 14 days, achieving a 90-95% net volume reduction. The process effectively concentrated the wastewater and demonstrated the potential for operational stability and environmental compliance.
Operational Efficiency: The adiabatic evaporator showed promise for ease of operation, maintenance, and integration with existing power plant operations. It could treat high total dissolved solids (TDS) content efficiently without the need for additional crystallizer stages.
Environmental and Economic Benefits: Utilizing waste heat from flue gas for evaporation, the technology offers an economically advantageous solution. It also produces a concentrated slurry that can be solidified/stabilized for disposal, thus addressing disposal and environmental concerns.
