What technology is commonly used in modern Waste-to-Energy plants to reduce air pollutants?

• A. Advanced filtration systems
• B. No filtration at all
• C. Open air venting
• D. Simple dust collectors

Answer: (A)

Modern Waste-to-Energy plants control air pollutants by using integrated emissions-cleaning technology that sits at the exhaust and removes both particulates and gaseous pollutants. The best choice captures the idea of this front-line mitigation: advanced filtration systems. These systems—such as baghouses (fabric filters) and electrostatic precipitators—remove fine particulates generated during combustion. They’re usually paired with additional controls like scrubbers for acid gases, activated carbon for mercury and dioxins, and catalytic or non-catalytic systems for reducing NOx, forming a multi-pollutant approach. Choosing advanced filtration reflects how modern plants actively trap contaminants at the source, whereas options like no filtration, open air venting, or only simple dust collectors would fail to address the range of pollutants and would release harmful emissions.