| 摘要 |
The apparatus comprises a motor (16) which is mounted on a float and in which the motor drives an impeller device (20) which extends below the liquid surface (11), with the motor (16) being mounted in a chamber (12) which is fully sealed from the liquid and which serves as a float (10). The apparatus may be fitted with a supply conduit (30) in order to bring gas, such as air, from above the liquid surface to the vicinity of the impeller device (20). The apparatus may be used for the treatment, mixing and/or aeration of liquids such as for example waste water.
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