Isolation and characterization of a novel photoheterotrophic strain ‘Rubrivivax benzoatilyticus TERI-CHL1’: Photo fermentative hydrogen production from spent effluent

A novel hydrogen producing photosynthetic bacterial strain identified as ‘Rubrivivax benzoatilyticus TERI-CHL1’ was isolated and purified from ‘TERI-CHL’ consortium’ enriched from the sediment samples of Chilika lagoon in Chilika, Odisha, India. Process parameters; pH & temperature, were optimiz...

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Bibliographic Details
Published in:International journal of hydrogen energy 2020-05, Vol.45 (28), p.14245-14254
Main Authors: Verma, Dipti, Ram Kumar, N., Subudhi, Sanjukta
Format: Article
Language:English
Subjects:
Bio-hydrogen
Dark fermentation
Photo fermentation
Photoheterotrophic
Purple non-sulfur bacteria
Rubrivivax benzoatilyticus
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Summary:A novel hydrogen producing photosynthetic bacterial strain identified as ‘Rubrivivax benzoatilyticus TERI-CHL1’ was isolated and purified from ‘TERI-CHL’ consortium’ enriched from the sediment samples of Chilika lagoon in Chilika, Odisha, India. Process parameters; pH & temperature, were optimized to enhance hydrogen production performence strain ‘TERI-CHL1’. Acetate, butyrate, sucrose and the spent effluent (DFE: Dark Fermentation effluent) from dark fermentative hydrogen production, explored to use as feed for monitoring hydrogen production performance of ‘TERI-CHL1’ through photo-heterotrophic growth mode. ‘TERI-CHL1’ produced 86.4 mmol/L of cumulative hydrogen from DFE at pH 7 and 37 °C temperature, with 75% H2 yield efficiency. Hydrogen yield efficiency of ‘TERI-CHL1’ from DFE was 8.74 mol per mole of DFE based fermentable organic acids and sugar. This study is the first report on Rubrivivax benzoatilyticus strain ‘TERI-CHL1’ as a promising microbe for valorisation of organic acid rich spent effluent for photofermentative biohydrogen production from Chilika lagoon. [Display omitted] •Rubrivivax benzoatilyticus TERI-CHL 1, novel PNSB strain isolated from Chilika lagoon.•This is first report on photo fermentative H2 production by the R. benzoatilyticus, sp.•TERI-CHL1 produced H2 from acetate, butyrate as well as from sucrose.•H2 yield efficiency of TERI-CHL1 from DFE; 8.74 mol/mol of substrate.•Substrate conversion efficiency of TERI-CHL1 for H2 production was 75%.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2020.03.133