Delignification and enhanced gas release from soil containing lignocellulose by treatment with bacterial lignin degraders

Rashid, G.M.M., Durán-Peña, M.J., Rahmanpour, R., Sapsford, Devin J. ORCID: https://orcid.org/0000-0002-6763-7909 and Bugg, T.D.H. 2017. Delignification and enhanced gas release from soil containing lignocellulose by treatment with bacterial lignin degraders. Journal of Applied Microbiology 123 (1) , pp. 159-171. 10.1111/jam.13470

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Abstract

Aims: The aim of the study was to isolate bacterial lignin-degrading bacteriafrom municipal solid waste (MSW) soil, and to investigate whether they couldbe used to delignify lignocellulose-containing soil, and enhance methanerelease.Methods and Results: A set of 20 bacterial lignin degraders, including 11 newisolates from MSW soil, were tested for delignification and phenol release insoil containing 1% pine lignocellulose. A group of seven strains were thentested for enhancement of gas release from soil containing 1% lignocellulose insmall-scale column tests. Using an aerobic pretreatment, aerobic strains such asPseudomonas putida showed enhanced gas release from the treated sample, butfour bacterial isolates showed 5–10-fold enhancement in gas release in anin situ experiment under microanaerobic conditions: Agrobacterium sp.,Lysinibacillus sphaericus, Comamonas testosteroni and Enterobacter sp.Conclusions: The results show that facultative anaerobic bacterial lignindegraders found in landfill soil can be used for in situ delignification andenhanced gas release in soil containing lignocellulose.Significance and Impact of the Study: The study demonstrates the feasibilityof using an in situ bacterial treatment to enhance gas release and resourcerecovery from landfill soil containing lignocellulosic waste.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Publisher:	Wiley-Blackwell
ISSN:	1364-5072
Date of First Compliant Deposit:	21 July 2017
Date of Acceptance:	5 April 2017
Last Modified:	24 Nov 2024 03:30
URI:	https://orca.cardiff.ac.uk/id/eprint/102848

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