Aerated Grit Chambers 1

These large aerated grit chambers feature very long (35m) grit screws in a cast-in-place trough.  

Grit is drawn to a sump pit where it is intermittently pumped out by grit pumps.  Low RPM intermittent operation allows for spiral lifetimes up to ten years.  This is a very cost-effective, low energy consumption and low operating cost system for large inflows and high grit loads.  

Aerated Grit Chamber
Aerated Grit Chamber engine