Grit Removal

The sewage is first pumped using three enclosed screw raw sewage pumps which provide a means of lifting the incoming sewage from the sewer system. We are not at the grit removal stage yet. The sewage then passes through the bar screens for rag removal. When the sewage moves to the grit tanks, the grit removal process starts. These tanks reduce the velocity of the sewage so that heavy particles may fall to the bottom. The solids are pumped to an auger pump that separates the water from the grit while the water moves onward. The grit (mostly inorganic solids) goes to a dumpster which is taken to a landfill. There may be two complete grit removal systems that are rotated in operation for equal hours.