Patent ID: 8397921

Claim:
A scum removing apparatus, which transfers generated scum on a current to a scum discharging mechanism side, and has a part of a scum inlet of the scum discharging mechanism submerged in water at the time of discharging scum so as to remove the generated scum; said scum removing apparatus comprising: a pressured water spraying device provided on the scum-flowing wall surface side of wall surfaces forming the scum inlet of the scum discharging mechanism; and a controller for controlling the scum discharging mechanism in accordance with a predetermined operation mode; wherein the controller activates the pressured water spraying device for a predetermined duration so that pressured water is sprayed vertically upward in water along the wall surface on the scum-flowing side from when a part of the scum inlet is submerged in water by the control of the controller until the scum begins to flow into the scum inlet; and wherein said predetermined duration is shorter than a duration of the submerging of the scum inlet.