The ventilation of working areas where odors are present is often required for personnel safety and comfort reasons. A continuous source of odors often requires continuous ventilation with a resultant transfer or displacement of an odor problem from a local or confined area to a more general area. In spite of the fact that this transfer is often accompanied by very generous dilutions with fresh air, increased environmental awareness has decreased and will continue to decrease public tolerance of odor pollution. As a result, the removal or treatment of odors is becoming increasingly important. This paper discusses a biological process which is being used to solve a common odor problem.