What is a gravity interceptor?

What is a gravity interceptor?

Gravity grease interceptors (GGIs) treat kitchen wastewater from food service establishments (FSEs) using gravity separation. They accumulate fats, oil and grease (FOG) and solids over time allowing the treated wastewater to discharge to the sanitary sewer (see the figure below).

What does a grease interceptor do?

A grease interceptor is a control device that is designed to collect and intercept FOG and food waste from wastewater discharged from Food Service Establishments, until they can be removed and disposed by wastehauling.

How does the grease trap work?

Whether automatic or manual, grease traps work by trapping the FOGS that rise to the top from wastewater before it enters the drains. When wastewater enters a grease trap, it slows the water flow down significantly, separating it into solids on the bottom layer, wastewater in the middle, and FOGS on the top.

How do you size a gravity grease interceptor?

To size a Gravity Grease Interceptor with the flow determined in GPM you simply multiply the flow number by a detention time, 30 minutes (the time period normally excepted for the grease to separate by buoyancy). Again with our 20 GPM example, the size would be 20X30= 600. A 600 Gallon size interceptor would be used.

What is grease interceptor cleaning?

The grease interceptor works by separating the grease and solids from the kitchen wastewater. Greasy wastewater entering the interceptor flows between the compartments al- lowing the water to cool over time. With sufficient time FOG and solids separate from wastewater.

Where is grease trap used?

a) Grease traps are used to pre-treat only culinary water from the food preparation area and kitchen. Used water discharged from toilets and other sanitary drain lines (private sewers) not serving the food preparation area shall be connected to the sewers and bypass the grease trap.

What is an interceptor in plumbing?

According to Universal Plumbing Code, “a grease trap/grease interceptor is a plumbing device that is installed in a sanitary drainage system to ‘trap’ or ‘intercept’ non-petroleum FOG from a wastewater discharge.” Wastewater flows from the sink of drain into a tank.

What is a hydro mechanical grease interceptor?

Hydromechanical grease interceptors (HGIs) (formerly named grease traps) treat kitchen wastewater from food service establishments (FSEs) using gravity separation aided by vented flow control. They are typically installed indoors and connected to one to four sinks in the kitchen and can be either above floor or below.

What are the different types of grease traps?

There are 3 main types of grease trap; passive hydromechanical (manual), automatic and gravity.

What is the difference between grease trap and grease interceptor?

Grease traps handle flow rates of 10–50 gallons per minute, while grease interceptors accommodate flow rates of more than 50 gallons per minute. Pressure. Grease traps work best in a low-pressure water environment, whereas grease interceptors are more appropriate for high-pressure environments.

What is a kitchen grease interceptor?

A grease trap (or grease interceptor) is a plumbing device (a type of trap) designed to intercept most greases and solids before they enter a wastewater disposal system. These units reduce the amount of fats, oils and greases (FOGs) that enter sewers.

Does grease interceptor need power?

Power to the unit should be turned Off, accumulated grease and oils must be removed, and clogged components must be cleaned. If these steps are not taken, performance of the interceptor will be compromised and unit may not function properly.