Abstract
AbstractIn Korea, almost every water treatment plant suffers from seasonal problem due to high concentrations of algae and turbidity, which result from eutrophication and heavy rainfall. To relieve this problem, experimental investigation was performed to test the applicability of floating-media (FM) and sand (SM) filtration as a preliminary water treatment for the algae and turbidity removal. Experimental results using artificial algae water showed that different morphology of algae as well as filtration velocity affect the removal efficiency. From the experiments using natural river water, it was concluded that algae removal is more affected by the depth of FM than that of SM. But turbidity was removed more effectively with deeper SM depth. Both algae and turbidity removals were affected by filtration velocity. The filtration system removed more total phosphorous (TP), total nitrogen (TN), turbidity, chlorophyll-a (Chl-a) and CODcr than dissolved organic carbon (DOC) and UV254. The removals of TP, TN, t...
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