SPU is a machine used for the pre- treatment of of wastes from cesspool, received from a tank truck connected to the machine by a quick connection pipe (Perrot) DN100.
It can combines up to three processes at a time: screening; grit removing; grease removing.
The screened wastewater reaches the sedimentation tank, where grits settle down and then are collected until the accumulation pit by a screw conveyor rotating in at the tank’s bottom.
Grits are extracted by the inclined screw conveyor.

The inlet valve is electrically controller.
A built-in stone trap avoids big stone/particles to reach the screen.