A two-staged system to generate electricity in microbial fuel cells using methane
KAUST DepartmentBiological and Environmental Sciences and Engineering (BESE) Division
Environmental Science and Engineering Program
Water Desalination and Reuse Research Center (WDRC)
Online Publication Date2018-07-04
Print Publication Date2018-11
Permanent link to this recordhttp://hdl.handle.net/10754/628276
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AbstractMethane is an abundant and inexpensive feedstock that is available as natural gas and renewable biogas. However, methane has not been regarded as a good substrate for microbial fuel cells (MFCs) due to low power densities. To increase power, a two-step strategy was used based on conversion of methane into methanol, followed by electricity generation using methanol as the substrate in the MFC. To produce methanol, a methane-oxidizing culture was grown in a high phosphate buffer resulting in the accumulation of 350 ± 42 mg/L of methanol. The methanol-fed MFC produced a maximum power density of 426 ± 17 mW/m. It was also shown that the methanol-rich medium produced from the first step can directly be supplied to the MFCs, removing the need for purification of methanol. Analysis of the microbial community suggests that acetogens first converts methanol into acetate, which is then consumed by exoelectrogens for power generation.
CitationMyung J, Saikaly PE, Logan BE (2018) A two-staged system to generate electricity in microbial fuel cells using methane. Chemical Engineering Journal 352: 262–267. Available: http://dx.doi.org/10.1016/j.cej.2018.07.017.
SponsorsThis research was funded by the Pennsylvania State University.
JournalChemical Engineering Journal