Devangi Sathe’s research while affiliated with Indian Institute of Science Education and Research Mohali and other places

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Publications (1)


Halophilic CO2-fixing microbial community as biocatalyst improves the energy efficiency of the microbial electrosynthesis process
  • Article

March 2023

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48 Reads

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13 Citations

Bioresource Technology

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Devangi Sathe

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Using saline electrolytes in combination with halophilic CO2-fixing lithotrophic microbial catalysts has been envisioned as a promising strategy to develop an energy-efficient microbial electrosynthesis (MES) process for CO2 utilization. Here, an enriched marine CO2-fixing lithotrophic microbial community dominated by Vibrio and Clostridium spp. was tested for MES of organic acids from CO2. At an applied Ecathode of -1V (vs Ag/AgCl) with 3.5 % salinity (78 mScm-1), it produced 379 ± 53 mg/L (6.31 ± 0.89 mM) acetic acid and 187 ± 43 mg/L (4.05 ± 0.94 mM) formic acid at 2.1 ± 0.30 and 1.35 ± 0.31 mM day-1, respectively production rates. Most electrons were recovered in acetate (68.3 ± 3 %), formate (9.6 ± 1.2 %) besides hydrogen (11 ± 1.4 %) and biomass (8.9 ± 1.65 %). Notably, the bioproduction of organic acids occurred at a high energetic efficiency (EE) of ∼ 46 % and low Ecell of 2.3 V in saline conditions compared to the commonly used non-saline electrolytes (0.5-1 mScm-1) in the reported MES studies with CO2 (Ecell: >2.5 V and EE: <34 %).

Citations (1)


... At the same time, in the anodic chamber, chemical or biochemical oxidation reactions occur that produce the electron and proton as by-products (Gong et al., 2013). Electrons transferred to the anode flow towards the cathode through the external circuit, while the proton passes through the membrane, separating both chambers (Kiran et al., 2023). The generated electron acts as an energy source for electro-trophic bacteria and bacterial metabolism proceeds by the Wood-Ljungdahl pathway to reduce the CO 2 into metabolite acetyl-CoA (Zhuang et al., 2014). ...

Reference:

Engineered nanomaterials for carbon capture and bioenergy production in microbial electrochemical technologies: A review
Halophilic CO2-fixing microbial community as biocatalyst improves the energy efficiency of the microbial electrosynthesis process
  • Citing Article
  • March 2023

Bioresource Technology