Discussion
Dust particles from thermal destruction of wastes can be prevented from escaping into the air by using
Answer: D
Dust particles from the burning of wastes can be stopped from escaping into the air by an electrostatic precipitator, which charges the particles and collects them on plates, option D.
An air conditioner, a bioreactor and a ventilator do not remove particulates from flue gas.
An electrostatic precipitator gives the dust particles an electric charge as the flue gas passes between plates, and then collects them on plates of opposite charge, removing over 99 per cent of the dust from the exhaust of power plants and incinerators. Air conditioners and ventilators only move air, and a bioreactor is used for biological treatment.
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