ODOR CONTROL FOR HEAT DRYING OF BIOSOLIDS

This paper presents a review of odor control issues associated with heat drying, including odor sources and characteristics, odor control strategies and treatment equipment, and design considerations. Heat drying involves several odor sources, such as process gas produced during drying, ventilation air from material handling, and ventilation air from storage. Each source has unique odor characteristics, which determine the appropriate treatment options. Odor control methods include thermal destruction, use of wet scrubbers and biofilters, and discharge to aeration basins. The equipment used depends on the volume and characteristics of the gas to be treated. Design considerations include treatment system configuration and the maintenance issues specific to the drying process.