Selection of Bioreactor Media for Odor Control
The support media is one of the most critical elements of a biofiltration system. In this chapter, biofilters and biotrickling filters will be referred to as “biofilter”, and this distinction will be discussed later in this chapter. The support media’s main function is to provide contact between the gas-phase contaminants and active microbial cultures either immobilized within and/or attached as a biofilm on the media’s surface. Other functions of the media are to distribute the gas flow evenly within the bed’s cross-sectional area with minimal gas-phase pressure drop, distribute any liquid nutrients sprayed on the bed’s surface, and prevent accumulation of biomass to prevent clogging, which would eventually lead to channeling of the gas and liquid.