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    Resistance assessment of microbial electrosynthesis for biochemical production to changes in delivery methods and CO2 flow rates

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    resistance assesment.pdf
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    Type
    Article
    Authors
    Bian, Bin cc
    Xu, Jiajie
    Katuri, Krishna
    Saikaly, Pascal cc
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Environmental Biotechnology Research Group
    Environmental Science and Engineering Program
    Water Desalination and Reuse Research Center (WDRC)
    KAUST Grant Number
    URF/1/2985-01-01
    Date
    2020-09-28
    Submitted Date
    2020-08-05
    Permanent link to this record
    http://hdl.handle.net/10754/665516
    
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    Abstract
    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.2020.124177
    Sponsors
    This work was supported by Competitive Research Grant (URF/1/2985-01-01) from King Abdullah University of Science and Technology (KAUST).
    Publisher
    Elsevier BV
    Journal
    Bioresource Technology
    DOI
    10.1016/j.biortech.2020.124177
    Additional Links
    https://linkinghub.elsevier.com/retrieve/pii/S0960852420314516
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.biortech.2020.124177
    Scopus Count
    Collections
    Articles; Biological and Environmental Sciences and Engineering (BESE) Division; Environmental Science and Engineering Program; Water Desalination and Reuse Research Center (WDRC)

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