MSD’s Morris Forman Water Quality Treatment Center is designed to treat 120 MGD of raw wastewater. In addition, all of the biosolids from Louisville’s other treatment plants are processed at the Morris Forman plant. Up until several years ago, air from much of the solids handling processes were treated by fume incineration. MSD was spending over $670,000 per year for natural gas for operation of the fume incineration process. In 2004, the decision was made to convert to biological treatment for control of odors from these sources.