| Title |
An Experimental Study on External Mass Transfer in Biofilm |
| Authors |
안규홍 ; 최승휘 ; 신항식 ( Kyu Hong Ahn ; Sung Hui Choi ; Hang Sik Shin ) |
| Abstract |
To adequately describe biofilm system, mass transfer resistances must be included. Especially the external mass transfer resistance, existing between bulk liquid and biofilm surface, was very important for design and operation of reactor. But the research of it was scarcity. In this paper, the external mass transfer coefficient which has research to reaction and mass transfer within biofilm was estimated. The following conclusions were made in this study. 1. It is acceptable to regard the substrate removal rate as first order reaction of substrate in this experimental condition. 2. Substrate was mostly removed within 100 um depth, although the effective depth became large enough. 3. The external mass transfer coefficient was proportional to 1.38 power of rotational speed of inner cylinder. |