Wastewater Treatment for Flue Gas Desulfurization (FGD)

Flue gas desulfurization is a system that has a set of technologies used to remove sulfur dioxide (SO2) from the flue gases, which are emitted from power plants. The stringent environmental regulations mostly focusing on controlling the excessive SO2 emissions are likely to increase the demand for flue gas desulfurization systems. The demand for flue gas desulfurization is rising across diversified end-use industries.

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The flue gas desulfurization market is categorized into dry FGD and wet FGD.  The wet FGD segment dominated the flue gas desulfurization market in 2019. Wet flue gas desulfurization processes are mostly based on the concept of absorbing sulfur dioxide in absorption liquor or caustic suspension. The wet FGD is in demand has it provides higher efficiency in the removal of SOx than the dry FGD. The wet FGD also provides lower operating cost and more fuel flexibility. Besides, the wet FGD systems use limestone as a reagent, and the by-product is gypsum, which can be marketed to cement and wallboard manufacturers and the fertilizer industry.

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