Resistance assessment of microbial electrosynthesis for biochemical production to changes in delivery methods and CO2 flow rates
Type
ArticleKAUST Department
Biological and Environmental Sciences and Engineering (BESE) DivisionEnvironmental Biotechnology Research Group
Environmental Science and Engineering Program
Water Desalination and Reuse Research Center (WDRC)
KAUST Grant Number
URF/1/2985-01-01Date
2020-09-28Submitted Date
2020-08-05Permanent link to this record
http://hdl.handle.net/10754/665516
Metadata
Show full item recordAbstract
Microbial electrosynthesis (MES) for CO2 valorization could be influenced by fluctuations in CO2 mass transfer and flow rates. In this study, we developed an efficient method for CO2 delivery to cathodic biofilm by directly sparging CO2 through the pores of ceramic hollow fiber wrapped with Ni-foam/carbon nanotube electrode, and obtained 45% and 77% higher acetate and methane production, respectively. This was followed by the MES stability test in response to fluctuations in CO2 flow rates varying from 0.3 ml/min to 10 ml/min. The biochemical production exhibited an increasing trend with CO2 flow rates, achieving higher acetate (47.0 ± 18.4 mmol/m2/day) and methane (240.0 ± 32.2 mmol/m2/day) generation at 10 ml/min with over 90% coulombic efficiency. The biofilm and suspended biomass, however, showed high resistance to CO2 flow fluctuations with Methanobacterium and Acetobacterium accounting for 80% of the total microbial community, which suggests the robustness of MES for onsite carbon conversion.Citation
Bian, B., Xu, J., Katuri, K. P., & Saikaly, P. E. (2021). Resistance assessment of microbial electrosynthesis for biochemical production to changes in delivery methods and CO2 flow rates. Bioresource Technology, 319, 124177. doi:10.1016/j.biortech.2020.124177Sponsors
This work was supported by Competitive Research Grant (URF/1/2985-01-01) from King Abdullah University of Science and Technology (KAUST).Publisher
Elsevier BVJournal
Bioresource TechnologyAdditional Links
https://linkinghub.elsevier.com/retrieve/pii/S0960852420314516ae974a485f413a2113503eed53cd6c53
10.1016/j.biortech.2020.124177