Abstract
The purpose of this research was to investigate the air curtain-exhaust ventilation system as an effective control at a rubber milling process. The investigated system consisted of an air curtain and an enclosure added to the existing control. The air curtain was located between the contaminant source and the mill operator to create an air barrier between the operator and the emission source. The enclosure covered the space between the exhaust hood and the mill's back side to eliminate contaminant emission at this space and to increase hood face velocity at the operator side. Laboratory and field test data indicate that a significant reduction in emissions was achieved when this system was operating, even when the existing hood exhaust airflow rate was reduced by 33%.