| 초록 |
A goal of this study is to investigate organics, NH4-N, PO4-P removal at various sludge retention time(SRT) using A/O type MBR. Lab-scale submerged MBRs at SRT of 10, 15, 20, and 30 days were performed at constant permeate flux of 10.2 L/m2h with hollow fiber microfiltration membranes. NH4-N removal rate increased with SRT since a higher biomass concentration, which was derived by longer SRT. But PO4-P was hardly removed. Regardless of SRT change, COD removal efficiency was considerably high(average 85% about) throughout the experiment. |
