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Hydrogenotrophic methanogen strain of Methanospirillum from anaerobic digester fed with agro-industrial waste

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Abstract

A hydrogenotrophic, mesophilic methanogen designated as strain T53BJ was isolated from anaerobic digester continuously fed with agro-industrial waste. Cells were stained Gram negative, spiral shaped, motile and found resistant to cell lysis by SDS and hypotonic solution. Growth occurred with optimum (i) temperature of 30 °C (20–40 °C) (ii) pH of 7.0 (6.5–8.5), in the presence of 0.0–0.2 M NaCl with a doubling time of 73.43 h and utilized only hydrogen and carbon dioxide (H2:CO2; 4:1) as a sole source of carbon and energy. The phenetic and phylogenetic analysis based on 16S rRNA and mcrA gene sequences revealed close affiliation of T53BJ strain to the genus Methanospirillum spp. This is the first report about isolation of hydrogenotrophic Methanospirillum spp. from anaerobic digester fed with fruit waste, press mud and neem seed cake, suggesting its potential use for bioaugmentation of anaerobic reactors or upgrading biogas/ syngas to methane.

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Abbreviations

AD:

Anaerobic digestion

WL:

Wood-Ljungdahl pathway

FW:

Fruit waste

PMC:

Press mud cake

NC:

Neem cake

JISL:

Jain Irrigation System Lmited

BCYT:

Basal carbonate yeast extract and trypticase

PYG:

Peptone yeast extract glucose

TCD:

Thermal conductivity detector

SDS:

Sodium dodecyl sulfate

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Acknowledgments

The authors are grateful to Late Padmashree Dr. B. H. Jain, Founder Chairman, JISL, Jalgaon for providing state-of-the-art R & D facilities to undertake the present work. Authors are thankful to Prof. Ms. Mukta Mahajan, Head, Department of English, School of Languages Studies and Research Centre, Kavayitri Bahinabai Chaudhari North Maharashtra University, Jalgaon for critically correcting the English in the manuscript.

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KALPANA A. JAIN: Performed Research and contributed to carry out experiments; PRADEEP C. SURYAWANSHI: Contributed to develop methods and suggestions; AMBALAL B. CHAUDHARI: Designed the outline of study and critically analyzed the manuscript and data.

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Correspondence to Ambalal B. Chaudhari.

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Jain, K.A., Suryawanshi, P.C. & Chaudhari, A.B. Hydrogenotrophic methanogen strain of Methanospirillum from anaerobic digester fed with agro-industrial waste. Biologia 76, 255–266 (2021). https://doi.org/10.2478/s11756-020-00559-y

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  • DOI: https://doi.org/10.2478/s11756-020-00559-y

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