| Abstract |
| This study was conducted to examine the sewage reuse system that was consisted of single aerobic MBR in first test run and MLE MBR system, a kind of BNR process, considering membrane fouling and performance in second test run. The HRT of single aerobic MBR was 2hr, and the effluent quality was good enough for reuse water. And then, the MBR process was transformed into MLE MBR process which was operated with HRT of 4hr (anoxic: 2hr, aerobic: 2hr) from 66th day operation. In that process, removal efficiency of BOD_(5), COD_(Cr), SS, T-N were 96.8%, 88.6%, 98.9%, 55% respectively. Although influent average C/N ratio was 1.93 in MLE MBR process operation, nitrification rate, specific nitrification rate, denitrification rate and specific denitrification rate were 83.35%, 0.07gNH₃-N/gMLVSS·day, 56.92% and 0.06gNO₃-N/gMLVSS·day respectively in overall study period. The recovery rate in MBR process was best when the cleaning interval was 10 minutes with washing mode of 30 sec. |
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| Key Words |
| MBR, Membrane Bioreactor, Sewage reuse, MLE MBR, Specific nitrification rate, Specific denitrification rate, Cleaning interval |
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