| Title |
A Study on First Flush Storage Tank Design for Combined Sewer Overflows (CSOs) Control |
| Authors |
손봉호 ( Bong Ho Son ) ; 어성욱 ( Seong Wook Oa ) |
| Keywords |
Combined Sewer Overflows; CSOs; First flush; Rainfall Intensity; Receiving water quality; Runoff storage tank |
| Abstract |
One of the best way to control Combined Sewer Overflow (CSO) is proposed to construct first flush storage tank. But there is little known parameters for optimum design of these facilities. This study was conducted to get optimum design parameters for a first flush storage tank construction. The optimization of the tank is generally based upon some measure of SS(Suspended Solid) mass holding efficiency. Water quality deterioration of receiving water body happened right after first time occurring rainfall in dry weather seasons. So, design rainfall intensity is used at 2 mm/hr for peak of monthly average intensities of dry seasons. The capacities for each evaluated catchment are designed from 14.4 min to 16.1 min HRT of CSOs flow at design rainfall intensity. Owing to all storage tanks are connected to interception sewer having a redundancy, the suggested volume could be cut down. |