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Nickel-Coated ceramic hollow fiber cathode for fast enrichment of chemolithoautotrophs and efficient reduction of CO2 in microbial electrosynthesis

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Abstract
Microbial electrosynthesis (MES) explores the potential of chemolithoautotrophs for the production of value-added products from CO2. However, the enrichment of chemolithoautotrophs on a cathode is relatively slow and the separation of the products is energy intensive. In this study, a novel and multifunctional cathode configuration, enabling the simultaneous enrichment of chemolithoautotrophs and separation of acetate from MES, was developed through one-step electroless nickel plating on ceramic hollow fiber (CHF) membrane. A thick layer of chemolithoautotrophs with 5.2 times higher cell density, which was dominated by Sporomusa (68 % of the total sequence reads in biocathode), was enriched on the membrane cathode surface through suspended biomass microfiltration compared to MES reactors operated without filtration. Simultaneously, > 87 % of acetate (31 mM) per batch could be harvested after catholyte microfiltration. The Ni content was > 80 % on the CHF surface after long-term operation in the two-chamber MES system, which exhibited 78 % lower charge transfer resistance compared to three-chamber MES system (similar to 110 vs 510 omega) for acetate separation/extraction. The ease of product separation in two-chamber MES systems and the fast establishment of chemolithoautotrophs on the cathode are a step forward in realizing MES systems as a promising platform for CO2 reduction and biochemical production in a circular carbon bioeconomy.
Keywords
Microbial electrosynthesis, Chemolithoautotrophy enrichment, CO2 valorization, Conductive membrane electrode, Microfiltration, Ceramic hollow fiber, ELECTROCHEMICAL MEMBRANE BIOREACTOR, LONG-TERM OPERATION, CARBON-DIOXIDE, HYDROGEN-PRODUCTION, COMMUNITY, ACETATE, CULTURE, PURE, FERMENTATION, SEPARATION

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MLA
Bian, Bin, et al. “Nickel-Coated Ceramic Hollow Fiber Cathode for Fast Enrichment of Chemolithoautotrophs and Efficient Reduction of CO2 in Microbial Electrosynthesis.” CHEMICAL ENGINEERING JOURNAL, vol. 450, no. part 3, 2022, doi:10.1016/j.cej.2022.138230.
APA
Bian, B., Singh, Y., Rabaey, K., & Saikaly, P. E. (2022). Nickel-Coated ceramic hollow fiber cathode for fast enrichment of chemolithoautotrophs and efficient reduction of CO2 in microbial electrosynthesis. CHEMICAL ENGINEERING JOURNAL, 450(part 3). https://doi.org/10.1016/j.cej.2022.138230
Chicago author-date
Bian, Bin, Yogesh Singh, Korneel Rabaey, and Pascal E. Saikaly. 2022. “Nickel-Coated Ceramic Hollow Fiber Cathode for Fast Enrichment of Chemolithoautotrophs and Efficient Reduction of CO2 in Microbial Electrosynthesis.” CHEMICAL ENGINEERING JOURNAL 450 (part 3). https://doi.org/10.1016/j.cej.2022.138230.
Chicago author-date (all authors)
Bian, Bin, Yogesh Singh, Korneel Rabaey, and Pascal E. Saikaly. 2022. “Nickel-Coated Ceramic Hollow Fiber Cathode for Fast Enrichment of Chemolithoautotrophs and Efficient Reduction of CO2 in Microbial Electrosynthesis.” CHEMICAL ENGINEERING JOURNAL 450 (part 3). doi:10.1016/j.cej.2022.138230.
Vancouver
1.
Bian B, Singh Y, Rabaey K, Saikaly PE. Nickel-Coated ceramic hollow fiber cathode for fast enrichment of chemolithoautotrophs and efficient reduction of CO2 in microbial electrosynthesis. CHEMICAL ENGINEERING JOURNAL. 2022;450(part 3).
IEEE
[1]
B. Bian, Y. Singh, K. Rabaey, and P. E. Saikaly, “Nickel-Coated ceramic hollow fiber cathode for fast enrichment of chemolithoautotrophs and efficient reduction of CO2 in microbial electrosynthesis,” CHEMICAL ENGINEERING JOURNAL, vol. 450, no. part 3, 2022.
@article{8770660,
  abstract     = {{Microbial electrosynthesis (MES) explores the potential of chemolithoautotrophs for the production of value-added products from CO2. However, the enrichment of chemolithoautotrophs on a cathode is relatively slow and the separation of the products is energy intensive. In this study, a novel and multifunctional cathode configuration, enabling the simultaneous enrichment of chemolithoautotrophs and separation of acetate from MES, was developed through one-step electroless nickel plating on ceramic hollow fiber (CHF) membrane. A thick layer of chemolithoautotrophs with 5.2 times higher cell density, which was dominated by Sporomusa (68 % of the total sequence reads in biocathode), was enriched on the membrane cathode surface through suspended biomass microfiltration compared to MES reactors operated without filtration. Simultaneously, > 87 % of acetate (31 mM) per batch could be harvested after catholyte microfiltration. The Ni content was > 80 % on the CHF surface after long-term operation in the two-chamber MES system, which exhibited 78 % lower charge transfer resistance compared to three-chamber MES system (similar to 110 vs 510 omega) for acetate separation/extraction. The ease of product separation in two-chamber MES systems and the fast establishment of chemolithoautotrophs on the cathode are a step forward in realizing MES systems as a promising platform for CO2 reduction and biochemical production in a circular carbon bioeconomy.}},
  articleno    = {{138230}},
  author       = {{Bian, Bin and Singh, Yogesh and Rabaey, Korneel and Saikaly, Pascal E.}},
  issn         = {{1385-8947}},
  journal      = {{CHEMICAL ENGINEERING JOURNAL}},
  keywords     = {{Microbial electrosynthesis,Chemolithoautotrophy enrichment,CO2 valorization,Conductive membrane electrode,Microfiltration,Ceramic hollow fiber,ELECTROCHEMICAL MEMBRANE BIOREACTOR,LONG-TERM OPERATION,CARBON-DIOXIDE,HYDROGEN-PRODUCTION,COMMUNITY,ACETATE,CULTURE,PURE,FERMENTATION,SEPARATION}},
  language     = {{eng}},
  number       = {{part 3}},
  pages        = {{10}},
  title        = {{Nickel-Coated ceramic hollow fiber cathode for fast enrichment of chemolithoautotrophs and efficient reduction of CO2 in microbial electrosynthesis}},
  url          = {{http://doi.org/10.1016/j.cej.2022.138230}},
  volume       = {{450}},
  year         = {{2022}},
}

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