| Title |
Analysis of Treatment Efficiency of Cylinder-Shaped Filter for Construction Site Runoff Control |
| Authors |
최종수 ( Jong Soo Choi ) ; 공영산 ( Young San Kong ) ; 이정민 ( Jung Min Lee ) ; 방기웅 ( Ki Woong Bang ) |
| DOI |
https://doi.org/10.15681/KSWE.2014.30.5.532 |
| Keywords |
Back-wash; Coagulant; Construction site; Cylinder-shaped filter; Runoff |
| Abstract |
A cylinder-shaped filter was developed to manage the runoff from construction sites. Compressed air was used for back- washing and pore sizes of filter were 23μm and 46μm. The turbid water was prepared using sediments in construction sites. The grain size analysis showed that grains smaller than 38μm and larger than 335μm in size constituted 34.4% and 37.6%, respectively. Removal efficiency of the filter on turbidity, SS, COD, TN and TP showed 25~37%, 20~40%, 50~55%, 23~27% and 14~20%, respectively, whereas their removal efficiecy by using coagulant PAC showed 77~84%, 70~83%, 53~60%, 27~36%, and 59~75%, respectively. The filtration time was determined to be around 10 to 20 minutes. Back-washing for 10 seconds by pressurized air resulted in a satisfactory regeneration efficiency. According to the aforementioned test results, the cylinder- shaped filter is effective in reducing turbidity and would be suitable for practical application in construction sites and farms. |