| 摘要 |
Disclosed is an apparatus for mechanically treating a liquid composition contained in a pool, including: -a frame which supports a motor (2) out of the liquid composition, -a drive shaft (6) which is rotatably driven by the motor, -a centrifugal surface aerator (4) which is rotatably driven by the drive shaft in a first rotation direction, -a bottom mixer (8), which is rotatably driven by the drive shaft, in which the motor (2) can be driven in a second rotation direction, counter to the first rotation direction. The apparatus includes a device for activation/deactivation of the aerator, which device is capable of deactivating the aerator (4) in the second rotation direction of the drive shaft (6), so that the aerator is not to rotatably driven by the drive shaft (6), the aerator being inoperative on the liquid composition. |
