| Title |
Evaluation of Biosorption Characteristics of Various Substrate in Anaerobic-Intermittently Aerated Process |
| Authors |
신응배 ( Sin Eung Bae ) ; 김미경 ( Kim Mi Gyeong ) ; 김재헌 ( Kim Jae Heon ) |
| Keywords |
Anaerobic-Intermittently Aerated Process; Biosorption; Acclimation; Isotherm; 혐기-간헐포기 공정; 순응; 등온흡착식 |
| Abstract |
In this study, five representative substrates (glucose, acetate, starch, humic acid, and glycogen) having different characteristics of biodegradability and microbial acclimation were chosen for evaluating biosorption capacity using activated sludge and autoclaved sludge as sorbents, and also effects of contact time, substrate concentration and anaerobic/aerobic conditions were investigated. Results showed that the anaerobic biosorption finished within 10 minutes after contact with substrates and the removal of glucose was two times greater than that of acetate. Considering that the microbes used in this study have been acclimated to glucose, this implies that the microbial acclimation is an important factor for biosorption. In cases of glucose, acetate, and starch, the substrate was removed by biological mechanism rather than by physicochemical mechanisms. The sorption experiments using the autoclaved sludge showed the constant substrate removal of 10-20 ㎎ COD/g SS. Results also showed that the biosorption of the activated sludge fitted the Langmuir isotherm and was largely affected by substrate affinity, biodegradability and microbial acclimation. |