Electricity from lignocellulosic substrates by thermophilic Geobacillus species.

Abstract:

:Given our vast lignocellulosic biomass reserves and the difficulty in bioprocessing them without expensive pretreatment and fuel separation steps, the conversion of lignocellulosic biomass directly into electricity would be beneficial. Here we report the previously unexplored capabilities of thermophilic Geobacillus sp. strain WSUCF1 to generate electricity directly from such complex substrates in microbial fuel cells. This process obviates the need for exogenous enzymes and redox mediator supplements. Cyclic voltammetry and chromatography studies revealed the electrochemical signatures of riboflavin molecules that reflect mediated electron transfer capabilities of strain WSUCF1. Proteomics and genomics analysis corroborated that WSUCF1 biofilms uses type-II NADH dehydrogenase and demethylmenaquinone methyltransferase to transfer the electrons to conducting anode via the redox active pheromone lipoproteins localized at the cell membrane.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Shrestha N,Tripathi AK,Govil T,Sani RK,Urgun-Demirtas M,Kasthuri V,Gadhamshetty V

doi

10.1038/s41598-020-72866-y

subject

Has Abstract

pub_date

2020-10-12 00:00:00

pages

17047

issue

1

issn

2045-2322

pii

10.1038/s41598-020-72866-y

journal_volume

10

pub_type

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