Patent ID: 7163198

Claim:
A stirring and aerating device for activated sludges comprising: a frame formed from a carrier element ( 2 , 3 ) holding a drive device ( 1 ); at least three support elements ( 4 ) extending from the carrier element; and an air supply for an aerating device ( 7 ), the aerating device located on a plane below a stirring element ( 9 ), the stirring element connected with the drive device ( 1 ) via a shaft ( 10 ), wherein the air supply takes place through a passage extending in a longitudinal direction in at least one of the support elements ( 4 ), wherein the aerating device is a ring line ( 7 ) being equipped with aerating openings, and wherein the ring line ( 7 ) is surrounded by the support elements ( 4 ) and is connected on a lower end of the support element ( 4 ) with the passage.