| 摘要 |
The invention relates to a plant and a method for controlling such a plant suitable for treatment of waste water. The plant (1) comprises a basin (2), at least one flow generating machine (6) adapted to generate a liquid flow in the basin (2), at least one equipment (7) in the basin (2) that effects the momentum of the liquid flow, and a control unit (8). The method being characterized by the steps of in the control unit (8) storing a predetermined relationship between the operational speed N of the flow generating machine (6) and an operational parameter P from which the torque M of the flow generating machine (6) may be derived, which relationship depends on a predetermined liquid flow speed V in the basin (2) by the flow generating machine (6), determining the operational speed N of the flow generating machine (6), from the determined operational speed N determining a set value of the operational parameter P of the flow generating machine (6) based on said relationship between the operational speed N of the flow generating machine (6) and the operational parameter P of the flow generating machine (6), by means of the control unit (8) determining a real value of the operational parameter P of the flow generating machine (6), and by means of the control unit (8) adjusting the operational speed N of the flow generating machine (6) if the real value of the operational parameter P of the flow generating machine (6) is different than the set value of the operational parameter P of the flow generating machine (6). |
