2009 Volume 38 Issue 11 Pages 801-809
Lipolytic bacteria were isolated from restaurant grease traps, and the isolate KHU, which has strong lipolytic activity, was selected for kitchen wastewater treatment. The isolate KHU, which was identified as Aeromonas sp., also has proteolytic and amilolytic ability and no pathogenic characteristics. It consumed grease and oil in restaurant wastewater at a rate of 20-46 mg/L/hr. An apparatus (the Oil Control System) which aerates a grease trap continuously and inoculates the culture of the bacterium once a day automatically into a grease trap was developed and tested. The system reduced grease and oil concentration in drainage water by 95% or greater and kept total grease quantity at 40 mg/L or less during five weeks of the experiment.
