|
DOI : , Vol.20, No.4, 3 ~ 10, 2012
|
| Title |
| Effect of Sedimentation,Filtration System for Tunnel Wastewater Treatment |
| 강용태 Yong Tae Kang , 송근관 Kune Kwan Song , 손정호 Jeong Ho Sohn , 김연은 Yun Eun Kim |
|
|
|
| Abstract |
| The purpose of this study is to investigate of sedimentation and characteristics of heavy metals removal for tunneling wastewater treatment. In the first experiment. Applied turbidity concentration was in the ranged 200~2,000NTU at bed depth of 50cm and Filtration velocity of 300m/day. In the second experiment, applied the turbidity concentration for raw water was in the ranged 1,000~6,000NTU. HRT of sedimentation was 15min 150min. The characteristics of raw ∼ water were pH 7.5, temperature 22.8 , salinity 15.2 and TDS 15.1g/L. As a result, raw water ℃ ‰ quality has a significant impact on the efficiency of the filtration. The sedimentation should be installed in pretretment process of the filtration because of high turbidity tunneling wastewater. The concentration of turbidity in the filtration influent should be pretreated with 400NTU. Therefore, the minimum HRT of grit chamber with turbidity concentration are 60,60,90 and 120min at 1,000, 2,000, 4,000 and 6,000NTU, respectively. For Al, Fe and Cd reduction, the removal efficiency were 53.0%, 70.5%, 66.8% respectively. This results show that turbidity, SS removal efficiency are similar to heavy metal removal efficiency in sedimentation. |
|
|
| Key Words |
| Aerobic, anoxic reactor, granule sludge, GAC, membrane filtration, pretreatment |
|
|
|
|
|
PDF