Abstract
In order to find high quality and low price hydrogen catalyst, a scrap metal net was used as single-chamber microbial electrolytic cell (MEC) cathode, and its hydrogen production performance was investigated at different applied voltages. Meanwhile, the microbial community structures of original aerobic activated sludge, MFC and MEC anode microbes were analyzed by 16S rDNA amplicon sequencing technology. As the applied voltage increased, the maximum current density was increased and the running time was shortened. At an applied voltage of 0.7 V, the hydrogen production and electrical energy efficiency obtained with scrap metal mesh cathode MEC were, respectively, 0.330±0.012 m3H2·m-3·d-1 and 177.0±5.6%, which were much higher than those at 0.5 V, but similar to those at 0.9V. The performance of waste metal mesh cathode MEC was comparable to that of Pt/C cathode MEC, and had good durability. The results of 16S rDNA amplicon sequencing showed that the culture environment had a great influence on the enrichment and elimination of microorganisms. Geobacter, the dominant bacterium of MEC anode, was extremely enriched in the applied electric field environment with a relative abundance of more than 79.4%.
Graphical Abstract
Keywords
scrap metal net, microbial electrolytic cell, hydrogen-producing performance, 16S rDNA amplicon sequencing
Publication Date
2019-12-28
Online Available Date
2019-01-28
Revised Date
2018-11-19
Received Date
2018-10-10
Recommended Citation
Hong-yan DAI, Hui-min YANG, Xian LIU, Xiu-li SONG, Zhen-hai LIANG.
Hydrogen Production of Microbial Electrolysis Cell Using Scrap Metal Net as Cathode and the Analysis of Microbial Community Structure in Anode[J]. Journal of Electrochemistry,
2019
,
25(6): 773-780.
DOI: 10.13208/j.electrochem.181010
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol25/iss6/15
