A Pilot Demonstration Of Spray Dryer Evaporation For Treating Power Plant FGD Wastewater
By Xinjun (Jason) Teng, Robert Strange, Bruce Easom and Jonathan Allen
The U.S. Environmental Protection Agency (EPA) is expected to limit the concentrations of species including selenium and mercury allowed to be discharged in wastewater from wet flue gas desulfurization (FGD) units at power stations. One treatment idea is spray drying evaporation, a zero liquid discharge (ZLD) technology. In this process, FGD wastewater droplets are sprayed concurrently with hot flue gases and the dried solids are collected using an electrostatic precipitator (ESP), or baghouse.
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