| Title |
Application of MBBR Process in the Activated Sludge Process |
| Authors |
박운지 ( Woon Ji Park ) ; 이해승 ( Hae Seung Lee ) ; 이찬기 ( Chan Ki Lee ) ; 김성근 ( Sung Gun Kim ) |
| Keywords |
Moving Bed Biofilm Reactor; MBBR; Hydraulic Retention Time; HRT; Nitrification rate; Denitrification rate; Internal Recycle; I;R |
| Abstract |
The objective of this study is to evaluate the possibility to apply the Moving Bed Biofilm Reactor(MBBR) in the activated sludge treatment process with existing aerobic HRT. Optimal operation conditions were assumed according to the analysis of organic matter and nutrients removal efficiencies depending on loading variations. The process was operated under different conditions: RUN Ⅰ(HRT=7.14hr, I·R=100%), RUN Ⅱ(HRT=6.22hr, I·R=100%), RUN Ⅲ(HRT=6.22 hr, I·R=l 50%), RUN Ⅳ(HRT=6.22hr, I·R=200%), the TBOD removal efficien Gies are 88%, 88.5%, 94.6%, 97.6%, respectively. Overall TSS removal efficiency is 90%, and it is increasing in RUN Ⅳ. In the case of Nitrogen, the highest removal efficiency of 90% was observed in RUN Ⅲ and RUN Ⅳ, Nitrification and Denitrification rates are 0.013-0.016 ㎏ NH₃-N/㎏ Mv-d and 0.009-0.019 ㎏ NO₃/㎏ My-d, respectively. Phosphorus removal efficiencies are 89.6% in RUN Ⅰ, 91.5% in RUN Ⅱ, 84.3% in RUN Ⅲ, and 76.4% in RUN Ⅳ. The process under shorter SRT yields better performance in terms of phosphorus removal. It was noticed that to achieve the effluent phosphorus concentration of less than 1 ㎎/L and removal efficiency higher than 80%, SRT should not be longer than 10 days. Experimental result shows that HRT of 6.22 hours is suitable for this treatment process, and, as a result, the aerobic reactor including moving media and DO depletion tank have a sufficient effect to the process performance. |