Hydrogen Production from Acetate in a Tube-type Microbial Electrolysis Cell
The tube-type microbial electrolysis cell (MEC) consisted of a glass tube,a plastic tube and a cathode tube coaxially from outside to inside respectively. The cathode was mipor titanium tube with electroplated platinum on its surface. The anode was graphite granules between the glass tube and the plastic tube.In 24h batch tests,when the applied voltages increased from 0.2V to 1.0V,the hydrogen production rate increased from 0.12 L/L/d to 1.63 L/L/d,and the hydrogen recovery increased from 58.5% to 77.8%.However,both the methane production rate and the total energy recovery increased first and then decreased as the applied voltage grew. The maximum methane production rate was 0.11 L/L/d when the applied voltage was 0.4V,while the maximum energy recovery was 74% when the applied voltage was 0.5V. After running the system for 7 days with an applied voltage of 1.0V,the hydrogen production rate dropped gradually from 1.63 L/L/d to 1.06 L/L/d. On the contrary,the methane production rate increased from 0.06 L/L/d to 0.22 L/L/d. These results demonstrated that higher applied voltages (＞0.6V) could limit the activity of methanogens in a short term.However,it was not favorable in the long run.It also demonstrated that this tube-type architecture MEC has the advantages of higher hydrogen production rate,lower internal resistance and being easier to scale-up than the previous architectures.
microbial electrolysis cell (MEC) tube-type biohydrogen production single chamber
Kun Guo Xinhua Tang Haoran Li Zhuwei Du
State Key Laboratory of Biochemical Engineering,Institute of Process Engineering,Chinese Academy of State Key Laboratory of Biochemical Engineering,Institute of Process Engineering,Chinese Academy of
国际会议
第二届中国微生物燃料电池研讨会(The 2nd Symposium on Microbial Fuel Cell in China)
北京
英文
34-35
2009-11-13（万方平台首次上网日期，不代表论文的发表时间）