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Green Homes & Businesses

Restaurants: Grease Control

Grease haulers are in business to pump out the contents of grease control devices (GCDs) at food service establishments. They transport the fats, oils and grease (FOG) and settled solids for disposal at facilities that accept such waste, like HRSD.

GOOD TO KNOW

There are three types of grease control devices (GCDs) typically used at food service establishments.

  • Hydromechanical Grease Interceptors (HGI) also known as grease traps are typically small and located indoors connected to a three-compartment sink. These are designed for separating and retaining the FOG and settled solids while allowing water to continue to flow at a designated flow rate into the sanitary sewer using gravity. Newer HGIs made from polycarbonate plastic are tested and rated to breakdown and retain a high capacity of grease.
  • The Gravity Grease Interceptors (GGI) are usually larger, made from concrete, and located outside underground. Like HGIs, these interceptors are also designed to separate and retain FOG and solids while allowing the remaining wastewater to be discharged to the sanitary sewer.
  • Automatic Grease Removal Devices (AGRD) are active, automatic devices that separate and remove FOG from wastewater while cleaning itself of accumulated FOG at least once every twenty-four hours using an electromechanical apparatus.

GOOD TO DO

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