| Abstract |
| The inlet water of the target final settling basin inflow into the top of sedimentation basin (0.3 m below the water surface). Therefore, strong water flow is formed on the surface of water and the Hydraulic Retention Time is short. so this causes decrease to sedimentation efficiency. In order to solve these problems, we performed to the computational fluid dynamics diagnosis. As a result of evaluating the hydraulic characteristics, it was confirmed that the lower inflow type was hydraulically advantageous than the conventional upper inflow type. So, we installed a baffle in front of the inlet to improve the lower inflow type. We compared water quality before and after the improvement, after improving two among four settling basin. In autumn(in October), the water quality improved about 60% in SS and 45% in TP compared to before the improvement. In winter(in December), it was about 18% in SS and 25% in TP compared to before the improvement. |
|
|
| Key Words |
| Computational fluid dynamics, Final clarifier, Inlet-structure, Lower inflow type, Poros perforated wall |
|
|
|
|
|
PDF