Reducing air pollution

A variety of air pollution control devices remove pollutants from industrial exhaust streams.

The table below compares dry and wet electrostatic precipitators (ESP) and scrubbers.

Process requirements	Dry ESP	Wet ESP	Scrubbers
Can handle moist gas	no	yes	yes
Particles collected in liquids	no	yes	yes
Collects particles under one micron	yes	yes	yes
Highly efficient for submicron particles and low energy consumption	yes	yes	no
Recommended for flammable chemicals	no	yes	yes

Table adapted from: crcleanair.com

Which of the devices in the table would be the most effective at collecting submicron particles in flammable chemicals?

AP®︎/College Environmental science