MDSJ AIR ENGINEERING’s electrostatic precipitators operate by electrostatically charging particles in the gas flow. The charged particles are attracted to plates or other collection electrodes and are deposited onto them. The purified air is then discharged from the precipitator through an outlet to the atmosphere. When sufficient particles have accumulated in the collection devices, they are shaken off by mechanical vibrators. The particles, which can be wet or dry, fall into a hopper beneath the unit, and a conveyor system retrieves them for disposal or recycling. Precipitators are commonly used in conjunction with denitrification units and scrubbers that remove nitrogen oxides or other devices that remove sulfur dioxide.