This is a wastewater pretreatment unit. This passes through a grill with a gap of 20 mm. The voluminous matter and other floating waste are trapped and retained by the grill. These solids must be collected manually from the draining basket using a rake.
Doing this we:
Avoid obstructing the channels, pipes or ducts.
Intercept materials that could damage the operation of the downstream units (degreaser, flow meter, decanter, etc.).
Increase the efficiency of the downstream biological treatments.