With its contribution to acid rain and the formation of fine particulate matter, the removal of SO₂ continues to be one of the most important environmental issues and financial challenges facing the coal-fired power industry and coal-fired boiler operators worldwide.

With tightening National Ambient Air Quality Standards (NAAQS), the Cross-State Air Pollution Rule (CSAPR), Regional Haze, and Europe's Directive on Industrial Emissions 2010/75/EU (IED), the power industry is demanding cost-effective, "Best Available Technologies"  for SO₂ control. Many are evaluating upgrading the performance of existing flue gas desulfurization (FGD) processes, a switch to the use of a lower sulfur coal, the addition of new scrubbers, or potentially having to retire electric generating units.

Since the early 1970s, AECOM Process Technologies has been providing Engineering (E);Engineering and Procurement (EP); and Engineering, Procurement, and Construction (EPC) services related to design, optimization and implementation of SO₂ removal technologies. We offer clients multiple alternatives for reducing SO₂ emissions. The best fit is often site specific. We maximize the use of existing equipment and infrastructure to deliver the lowest cost solutions.