Effect of pre-acclimation of granular activated carbon on microbial electrolysis cell startup and performance
KAUST DepartmentBiological and Environmental Sciences and Engineering (BESE) Division
Water Desalination and Reuse Research Center (WDRC)
MetadataShow full item record
AbstractMicrobial electrolysis cells (MECs) can generate methane by fixing carbon dioxide without using expensive catalysts, but the impact of acclimation procedures on subsequent performance has not been investigated. Granular activated carbon (GAC) was used to pre-enrich electrotrophic methanogenic communities, as GAC has been shown to stimulate direct transfer of electrons between different microbial species. MEC startup times using pre-acclimated GAC were improved compared to controls (without pre-acclimation or without GAC), and after three fed batch cycles methane generation rates were similar (P > 0.4) for GAC acclimated to hydrogen (22 ± 9.3 nmol cm− 3 d− 1), methanol (25 ± 9.7 nmol cm− 3 d− 1), and a volatile fatty acid (VFA) mix (22 ± 11 nmol cm− 3 d− 1). However, MECs started with GAC but no pre-acclimation had lower methane generation rates (13 ± 4.1 nmol cm− 3 d− 1), and MECs without GAC had the lowest rates (0.7 ± 0.8 nmol cm− 3 d− 1 after cycle 2). Microbes previously found in methanogenic MECs, or previously shown to be capable of exocellular electron transfer, were enriched on the GAC. Pre-acclimation using GAC is therefore a simple approach to enrich electroactive communities, improve methane generation rates, and decrease startup times in MECs. © 2016 Elsevier B.V.
CitationLaBarge N, Yilmazel YD, Hong P-Y, Logan BE (2017) Effect of pre-acclimation of granular activated carbon on microbial electrolysis cell startup and performance. Bioelectrochemistry 113: 20–25. Available: http://dx.doi.org/10.1016/j.bioelechem.2016.08.003.
- Characterization of methane production and microbial community shifts during waste activated sludge degradation in microbial electrolysis cells.
- Authors: Sun R, Zhou A, Jia J, Liang Q, Liu Q, Xing D, Ren N
- Issue date: 2015 Jan
- Enrichment of specific electro-active microorganisms and enhancement of methane production by adding granular activated carbon in anaerobic reactors.
- Authors: Lee JY, Lee SH, Park HD
- Issue date: 2016 Apr
- Comparing activated carbon of different particle sizes on enhancing methane generation in upflow anaerobic digester.
- Authors: Xu S, He C, Luo L, Lü F, He P, Cui L
- Issue date: 2015 Nov
- Evaluation on direct interspecies electron transfer in anaerobic sludge digestion of microbial electrolysis cell.
- Authors: Zhao Z, Zhang Y, Quan X, Zhao H
- Issue date: 2016 Jan
- Effects of granular activated carbon on methane removal performance and methanotrophic community of a lab-scale bioreactor.
- Authors: Lee EH, Choi SA, Yi T, Kim TG, Lee SD, Cho KS
- Issue date: 2015