Untreated effluent was subjected to secondary motion flows and gravity as described earlier to settle particulate matter into a 45° cone bottom.Treated effluent exired from a 7.6-cm port located near the top of the swirl separator and entered the secondary filtration component.The manufacturer states that swirl separator could accept up to 378 L/min.This equates to a potential hydraulic loading rate of 694 m/m/d of plab area