- Flue Gas Desulphurization is widely
acknowledged as today’s state-of-the art technology for removing
sulfur dioxide from the exhaust flue gas in coal- and oil-fired
- Although the FGD process was originally
established for environmental purposes, a large amount of high
quality, synthetic gypsum is created as a byproduct of the scrubbing
- Wet flue gas desulfurization or scrubber
systems are an excellent way of reducing the sulfur dioxide
emissions caused by coal combustion boilers.
- Conventional wet FGD systems are in
successful operation at a large number of coal-fired facilities
ranging in size from small, individual applications to large utility
applications of more than 1000 MW.
- FGD wastewater treatment has primarily
consisted of physical/chemical processes for the removal of total
suspended solids (TSS) and heavy metals.
- An innovative and patent-pending
biological treatment system, iBIO™ technology, developed by
Degremont Technologies – IDI, provides an enhanced treatment option
for the removal of residual selenium compounds from FGD wastewaters.
- The new FGD wastewater method requires the
analysis of two new QC samples, a Synthetic FGD Matrix Sample and a
Fortified FGD Matrix Sample.
- Flue gas desulphurization (FGD) gypsum is
understood as being the hydrated calcium sulphate (CaSO4 • 2 H2O)
produced within the flue gas desulphurization of power stations. FGD
gypsum is also referred to as raw gypsum.
- The great majority of recently proposed
and installed FGD systems for coal-fired units have utilized the wet
limestone forced oxidation (LSFO) process.
- Cost estimate modeling for enhancement of
mercury emissions control with a wet FGD system calculates the
annual levelized costs following the basic methodology of EPRI’s
TAG™ Technical Assessment Guide.
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