ZLD Solutions for the Treatment of FGD Wastewater
International Water Conference 2007
Abstract: Many challenges exist in the treatment of the wastewater from the flue gas desulfurization (FGD) process. These challenges include high concentrations of calcium, magnesium, and chloride ions as well as large fluctuations in the FGD wastewater blowdown quantity and quality. Boron, ammonia and heavy metals are also typical impurities that must be overcome. Different types of ZLD processes have been developed that offer viable solutions to the growing problem of FGD wastewater treatment. This paper discusses and compares the chemistry considerations for several competing ZLD processes thus allowing for a better understanding of the issues involved and their impact on selection of the ZLD process.
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