During the accumulation phase of the basin, the swivel jet cleaners are in the standby mode. When the basin has filled up the cleaners start the aeration. The basin is aerated by means of an intermittent jet with the jet pipe pointing rigidly in one direction. The actual cleaning process starts in the emptying phase of the rain basin. The jet pipe swivels during this stage and stops at defined stopping points for a certain period of time (interval jet). The contents of the basin are thoroughly mixed in this process.
Final cleaning begins at a residual water level (e.g. 1 m). The bottom of the basin, the walls of the basin and any pillars are cleaned by the concentrated cleaning jet. Suspended solids are removed from the basin during the emptying phase.