Pollution from Thermal Power Plants. Harmful Emissions ...
Desulphurisation plants downstream of the boilers also reduce emissions. Fluidized bed combustion of coal is another effective method to reduce SO 2 emissions.. Ash. Ash is the residue after the combustion. A 500 MW coal fired power plant burning Coal with around 20 % Ash, collects ash to the tune of Two Million Tons in Five years.