Do the Grease Interceptors Required by the Florida
Code Really Work Better than Concrete?
When it comes to comparing Gravity style grease interceptors and Hydro-Mechanical
style grease interceptors, the bigger box does not necessarily hold more. This is because of the
fact that Gravity grease interceptors require a large volume of water to accomplish
separation. As the water volume diminishes (is replaced with grease), so does their
efficiency. Because Hydro-Mechanical interceptors rely on the inlet diffuser to slow down and
diffuse the incoming waste stream, and keep the influent from disturbing the existing grease layer, they can
utilize nearly all of the volume of their tank to store
grease and solids.
There are also a couple of other fundamental differences
between a Concrete grease interceptor
- Gravity style interceptors do not perform consistently
across varying flows. At high flow rates,
- Hydro-Mechanical grease interceptors perform consistently
up to their rated flow. They have the same
- Gravity style interceptors are subject to "channeling".
As they become full, the incoming influent "pushes"
- Hydro-Mechanical interceptors are not subject to
"channeling". Because the inlet diffuser slows down
(The above referenced information can be found in
the WERF Report. The WERF Report is widely