A new upgraded biogas production process: Coupling microbial electrolysis cell and anaerobic digestion in single-chamber, barrel-shape stainless steel reactor
A new upgraded biogas production process: Coupling microbial electrolysis cell and anaerobic digestion in single-chamber, barrel-shape stainless steel reactor
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全新升级的沼气生产工艺：单室桶形不锈钢反应器中微生物电解池与厌氧消化耦合
DOI：
10.1016/j.elecom.2014.05.026
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发表时间：
2014-08-01
影响因子：
5.4
通讯作者：
Yan, Zhiying
中科院分区：
文献类型：
--
作者：
Bo, Tao;Zhu, Xiaoyu;Yan, Zhiying
需要生产升级后的沼气，以尽可能多地消除二氧化碳。结果表明，在单室桶形不锈钢反应器中，采用微生物电解槽(MEC)和厌氧消化(AD)相结合的方法，与常规厌氧消化(对照)相比，甲烷含量可达98%以上，甲烷产率提高2.3倍。同时，COD的去除效率提高了两倍，碳的回收率提高了56.2%。在这一新工艺中，不需要的二氧化碳在阳极上被优势微生物--产氢电甲烷菌(如甲烷螺杆菌)原位转化为甲烷。这些微生物可以利用不锈钢反应器内表面产生的氢气，而不锈钢反应器本身通过低电压(1.0V)的加入作为MEC的阴极。总体能效为66.7%。(C)2014爱思唯尔B.V.保留所有权利。
Production of upgraded biogas is required to remove as much carbon dioxide as possible. It was found that by coupling microbial electrolysis cell (MEC) and anaerobic digestion (AD) in a single-chamber, barrel-shape stainless steel reactor, compared with common anaerobic digestion (control), CH4 content in excess of 98% was achieved and CH4 yield was increased 2.3 times. Meanwhile, the COD removal rate was tripled and carbon recovery was increased by 56.2%. In this new process, unwanted CO2 was in situ converted into CH4 on anode by the dominant microbes, hydrogenotrophic electromethanogens (e.g. Methanospirillum). These microbes could utilize hydrogen gas generated at the inner surface of stainless steel reactor, which itself served as cathode of MEC through small voltage addition (1.0 V). The overall energy efficiency was 66.7%. (C) 2014 Elsevier B.V. All rights reserved.