MB Odor Controller, formerly OdorCap, is a broad-based biological formulation for controlling a wide range of wastewater odors. MB Odor Controller is a biological odor control solution for general wastewater applications and sludges. It contains a high concentration of odor-degrading microorganisms for long-term odor prevention plus fragrance for immediate relief. Used regularly, MB Odor Controller provides consistent and long-term odor control.