Combination of ensiling and fungal delignification as effective wheat straw pretreatment

Biotechnology for Biofuels
Sune Tjalfe ThomsenAnne S Meyer

Abstract

Utilization of lignocellulosic feedstocks for bioenergy production in developing countries demands competitive but low-tech conversion routes. White-rot fungi (WRF) inoculation and ensiling are two methods previously investigated for low-tech pretreatment of biomasses such as wheat straw (WS). This study was undertaken to assess whether a combination of forced ensiling with Lactobacillus buchneri and WRF treatment using a low cellulase fungus, Ceriporiopsis subvermispora, could produce a relevant pretreatment effect on WS for bioethanol and biogas production. A combination of the ensiling and WRF treatment induced efficient pretreatment of WS by reducing lignin content and increasing enzymatic sugar release, thereby enabling an ethanol yield of 66 % of the theoretical max on the WS glucan, i.e. a yield comparable to yields obtained with high-tech, large-scale pretreatment methods. The pretreatment effect was reached with only a minor total solids loss of 5 % by weight mainly caused by the fungal metabolism. The combination of the biopretreatments did not improve the methane potential of the WS, but improved the initial biogas production rate significantly. The combination of the L. buchneri ensiling and C. subvermispora WRF tre...Continue Reading

References

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Aug 16, 2013·Biotechnology for Biofuels·Morten Ambye-JensenAnne S Meyer
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Dec 30, 2014·Applied Biochemistry and Biotechnology·Sune Tjalfe ThomsenZsófia Kádár
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Citations

Dec 9, 2014·Biotechnology Advances·Leona PaulovaKarel Melzoch
Feb 15, 2020·Asian-Australasian Journal of Animal Sciences·Sasa ZuoChuncheng Xu
Oct 17, 2017·Journal of the Science of Food and Agriculture·Lei MaoJohn W Cone
Jul 21, 2021·Biotechnology for Biofuels·Kehinde Oladoke OlatunjiOyetola Ogunkunle

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