| Title |
A Study on the Early-stage Storm Runoff Treatment for the Reduction of Non-point Pollution Materials on the Road |
| Authors |
노성덕 ( Sung Duk Roh ) ; 이대근 ( Dae Keun Lee ) ; 전양근 ( Yang Kun Chun ) |
| Keywords |
Catch Basin; Non-point pollution materials; Storm runoff; STORMSYS process |
| Abstract |
The object of this study was to test for STORMSYS process that composed Catch Basin and Stormsys(three units: vortex solids separator, filter media bed and vegetated filter strips). It could be applied to treat the first-flush non-point pollution materials on the road(especially, motorway). This study investigated that the runoff characteristics of non-point pollutions containing the heavy metal(Fe, Zn and Cu) by rainfall showed relatively high pollution concentration in the early-stage storm runoff on the road, which seems to be caused by the vehicular traffic, and showed the rapid reduction of pollution concentration on the basis of about 5mm rainfall volume. As the number of the non-rainy days were increased, the pollution concentration by storm runoff was increased, also. As a test result of this process, the average removal efficiency of BOD, COD_(mn), SS, T-N and T-P over the testing period were 92.7%, 88.6%, 97.4%, 93.0% and 93.3%, respectively. Also, the average removal efficiency of n-Hexane, Fe, Zn and Cu were 86.7%, 96.1%, 84.4% and 78.4%, respectively. As shown in the characteristics of storm runoff, the non-point pollution materials have high pollution concentration in the early-stage storm runoff on the road, the installation of STORMSYS process is expected to reduce considerable amount of non-point pollutions. |