| Title |
Evaluation of COD Utilization for Biological Nutrient Removal with dPAO in SBBR-MSBR System |
| Authors |
이한샘 ( Han Saem Lee ) ; 한종훈 ( Jong Hun Han ) ; 윤주환 ( Zu Whan Yun ) |
| Keywords |
COD utilization; Denitrifying PAO; dPAO; Membrane SBR; MSBR; Sequencing batch biofilm reactor; SBBR |
| Abstract |
The combined system of sequencing batch biofilm reactor (SBBR) and membrane SBR (MSBR) was operated with sewage to evaluate the COD utilization for biological nutrient removal (BNR). The SBBR was operated for nitrification reactor, while denitrifying PAO (dPAO) was cultivated in MSBR with anaerobic-anoxic operation. In the SBBR and MSBR system, the enhanced biological phosphorus removal (EBPR) was successfully achieved with higher N removal. The COD utilization in combined SBBR-MSBR system was significantly reduced compared to ordinary BNR (up to 3.1 g SCOD/g (N+P) and 1.6 g SCOD/g (N+P) with different C/N/P ratio). The results suggest that a dPAO process could effectively reduce carbon energy (=COD) requirement. The combination of oxic-SBBR and anaerobic-anoxic MSBR for dPAO utilization could be an attractive alternative to upgrade the process performance in weak sewage. |