Spanish to English Tech/Engineering Other Waste treatment plant

From the specifications of a series of tests to be run at a new waste incineration plant:

"Si procede, mediante un caudalímetro que controle el agua consumida por el **sistema de corrección del polvo** (con técnica de nebulosa)"

I'm pretty sure that this technique refers to the "sistema de corrección del polvo" rather than to the flowmeter, but I could be wrong. As I said in last question, this system is to remove dust from the air by, I think, spraying or dampening the air. Nebula technique??? Cloud/Mist/Spray technique??

Any help greatly appreciated. Spanish from Spain. UK English if possible. Thanks!