1.Shred solids in wastewater,no need to collect waste and deliver 2.Protect pumps, ... odors,low noise Construction The wastewater grinders are assembled by motor, reducer, gear box, cutting chamber, drum,mechanical seal, shell, PLC etc ... : coil made of stainless steel: 304 • Optional: perforated, stainless steel drum with diameter 6mm openings Channel type single drum wastewater grinder