Large aerated grit chambers feature very long (35m) grit screws in a cast-in-place trough and several grit chamber installations in Canada.
In the first solution 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.
The second Grit chamber was commissioned in 2009 and features long run spirals in cast-in-place troughs. Various liner options are available, in this case Hardox wear bars are utilized. This provides long liner and spiral life given low RPM, submerged and intermittent operation.
Products
High capacity grit settling tanks
