Abstract: A system and method for treating wastewater containing industrial esters collected from grease traps at food establishments, septic tanks or from sludge digesters by increasing the pH of the wastewater to break down the ester. The increased pH wastewater is mixed to a predetermined mean velocity gradient which allows the influent to react. The reacted influent is then stabilized to lower the pH to normal levels suitable for input into a municipal wastewater treatment facility. Volatile gases are drawn off from all of the reactor tanks and placed into a treatment tank. In the tank a reduction of the bacterial and odor level occurs when the wastewater reacts with the chlorine-containing water output of the municipal wastewater treatment facility.