Biological enhanced treatment and send filtration are established being operated to remove nutrients and MBAS(Methylene Blue Activate Substance) in the most of Waste Water Treatment Plant(WWTP) in Korea.
However, untreated synthetic detergents and nutrients which directly run into the water system present an unpleasant view because of the foam, taste and odor generating filamentous periphytic algae and interrupting self-purification in the stream.
Therefore, this research was enforced to know the MBAS removal efficiency of the sand filtration about G WWTP which reuses effluent as urban stream management water.
As a result, the maximum removal efficiency using sand filtration was 63% after 24 hours and particularly 30% after 2 or 4 hours which turned out to be not that effective.
In conclusion, It is recognized that other methods of MBAS removal and a research will be needed which reuse effluent as urban stream management water from now on.
Because the MBAS removal with sand filtration is insufficient with economical efficiency from the fact that it needs long hours for a sand filtration treatment and the removal efficiency was almost below the expectation.