Civil and Environmental Engineering, University of Alberta, 9211-116 Street NW, Edmonton, AB T6G 1H9, Canada.
Civil and Environmental Engineering, University of Alberta, 9211-116 Street NW, Edmonton, AB T6G 1H9, Canada.
Bioresour Technol. 2021 Jan;319:124109. doi: 10.1016/j.biortech.2020.124109. Epub 2020 Sep 12.
From the perspective of energy saving in the operation of microbial electrolysis cell assisted anaerobic digester (MEC-AD), this study focused on developing an intermittent power supply scheme. The applied potential was switched off for 12 and 6 hours/day during the operation of a laboratory-scale MEC-AD system fed with glucose. The results from the operation under continuous applied potential served as the control. The overall biomethane generation and net energy income from the process were unaffected when the applied potential turned off for 6 hours/day. Both quantitative and qualitative analyses of microbial communities suggested that a balanced microbiome could be maintained under short-term switching-off the applied potential. However, performance substantially deteriorated when the applied potential turned off for 12 hours/day. Overall, the results of this study suggest that MEC-AD operation does not need a continuous power supply, and higher energy efficiency can be effectively achieved by intermittently powering the reactor.
从微生物电解池辅助厌氧消化器（MEC-AD）运行中的节能角度出发，本研究专注于开发间歇供电方案。在以葡萄糖为底物的实验室规模 MEC-AD 系统运行过程中，施加的电压每天关断 12 小时和 6 小时。以连续施加电压下的运行结果作为对照。当施加电压每天关断 6 小时时，整体生物甲烷生成和工艺的净能量收益不受影响。微生物群落的定量和定性分析表明，在施加电压短期关断的情况下，可以维持一个平衡的微生物组。然而，当施加电压每天关断 12 小时时，性能会显著恶化。总的来说，本研究结果表明，MEC-AD 运行不需要连续供电，通过间歇供电可以有效地实现更高的能源效率。
