Full Text
Pretreatment Devices Grease Interceptor An Interceptor is typically a pre- cast concrete vault, with a minimum capacity of 750 gallons that is located in-ground outside of the building. The vault includes two compartments and the flow between each compartment is through a 90o fitting designed for grease retention. The capacity of a properly sized grease interceptor will provide adequate residence time. This gives the wastewater time to cool, allowing grease to congeal and rise to the surface, where it accumulates until the device is cleaned. These large interceptors are capable of holding large volumes of spent fat, oil, grease, and related food materials. The required frequency for cleaning, depending on volume, washing, and disposal practices, can range from to quarterly. Installation note: For any grease interceptor or grease trap to be effective, the units must be properly size, constructed, installed and maintained, to provide an adequate retention time for the settling and accumulation of fats, oil, grease, and related food materials. Permits and inspections are required for grease interceptor and grease trap installations. Grease Trap A grease trap is a small indoor reservoir built into the wastewater piping a short distance from the production area. Normally installed under or next to the dish washing sinks. Baffles in the reservoir retain the wastewater long enough for the grease to congeal and rise to the surface. These small traps are only capable of handling small volumes of spent fats, oil, grease, and related food materials. The required frequency for cleaning, depending on volume and washing practices can range from daily to weekly. Installation note: For any grease interceptor or grease trap to be effective, the units must be properly size, constructed, installed and maintained, to provide an adequate retention time for the settling and accumulation of fats, oil, grease, and related food materials. Permits and inspections are required for grease interceptor and grease trap installations.