| 초록 |
Food wastes have been regarded the main source of various environmental pollutions. Under this circumstance, employing food wastes as substrates for hydrogen production would be very attractive strategy because they are rich in carbohydrates and can provide carbon energy source for the mixed culture. In this work, we isolated hydrogen-producing anaerobes (identified as genus Clostridium) from a food waste treatment process. The isolate was applied to an immobilized bioreactor packed by polyurethane foam. Effects of hydraulic retention time (HRT) on hydrogen production rate and hydrogen yield were investigated to identify for the proper conditions for hydrogen evolution with the isolate. In continuous cultures without pH control, the maximum hydrogen evolution rate was 7.2 L/L/d at hydraulic retention time of 2 h and the maximum hydrogen yield was 223 mL/g hexose. The value was the higher than those of other researches. Therefore, the immobilized system was an effective and stable approach for continuous hydrogen production for efficient utilization of carbon substrates. |
