Effect of Ce3+ on Hydrogen Generation by Anaerobic Digestion

Abstract:

The effect of rare earth element Ce3 +on hydrogen production was investigated in this study.The data indicated that the hormesis effect of Ce3+was performance on hydrogen generation,the maximum hydrogen yield reached 123.2 mL/g by adding Ce3+concentration of 0.1 mg/L,which was 120.3% of control.The concentration of VFA by adding 0.1 and 0.05 mg/L Ce3+was 4 511.8 and 4 420.3 mg/L after reaction,which was 1.49 and 1.46 times of control,respectively.The utilization of glucose in each group was between 76.2% and 92.1%.The dehydrogenase activity represented initially increased then decreased trend,the maximum dehydrogenase activity was 5 042.3 μg/(g·h) by adding 0.1 mg/L Ce3+,which was 110.0% of control.