| Abstract |
| The pollution of river water with organics, nitrogen, phosphorus, and nonbiodegradable matter from point and nonpoint sources within a river basin is a serious problem, particularly for areas that rely on river water for drinking. This problem is exacerbated when the flow rate is reduced by the construction of weirs on a river. The deterioration in the water quality of rivers thus requires the development of more advanced treatment processes. The objective of this research was to evaluate the performance of an upflow biological aerated filter (UBAF) packed with zeocarbon as the filter medium in the removal of dissolved organic carbon (DOC), NH4-N, Fe, and Mn from polluted river water. For filtration velocities of 100-200m/d in the UBAF bed, the removal efficiency was >40% for DOC, >80% for NH4-N, >76% for Fe, and >81% for Mn, with a lower removal efficiency observed with a higher filtration velocity. In particular, a filtration velocity of less than 150m/d enabled stable treatment and produced river water of a grade I quality as a drinking water source. In addition, the nitrification rate of the UBAF was found to be consistent for a range of water temperatures and bed volumes. Collectively, these results indicate that the high nitrification rate and high removal of Fe and Mn by UBAFs can reduce the levels of chlorine and coagulants needed for pre-chlorination and coagulation/sedimentation processes, respectively. |
|
|
| Key Words |
| Upflow biological aerated filter, Zeocarbon, Biofiltration, Biodegradation, Nitrification rate, 상향류호기성생물막반응조, 제오카본, 생물막여과, 생분해, 질산화속도 |
|
|
|
|
|
PDF