The most popular post-combustion control to reduce Sulfur dioxide emissions is Flue Gas Desulfurization (FGD) System. The book demystifies the practical aspects of FGD System and sincere efforts were made to minimize inclusion of bookish knowledge. This compilation has facilitated capturing of knowledge and experience of already trained and experienced professionals for the benefit of the budding power engineers. In first two chapters, the book covers overview & Indian Scenario of FGD System. It covers Environment notifications, timelines, already installed capacity & future plans. Third & fourth chapters throw light on types of FGD Systems and detailed description of system, sub systems, chemical reactions etc. of wet FGD System. Chapter five focuses on cost of FGD Sytem, Limestone requirement and Gypsum Generation. Chapter six explains civil works including Geotech Investigation, Piling, Wellpoint Dewatering, Chimney Erection through slipform, Flue Can erection, Borosilicate lining etc. Chapter seven decodes Absorber sizing, Absorber material and erection philosophy. Chapter eight breaks down the control philosophy of the FGD System including three major & seven minor control systems. Chapter nine enlightens the readers with Learnings. These Learnings can help everyone working in the field of FGD erection & planning. Chapter ten covers the typical calculations of Limestone requirement and Gypsum production.