Combination of ensiling and fungal delignification as effective wheat straw pretreatment
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Combination of ensiling and fungal delignification as effective wheat straw pretreatment. / Thomsen, Sune Tjalfe; Londoño, Jorge E G; Ambye-Jensen, Morten; Heiske, Stefan; Kádár, Zsófia; Meyer, Anne S.
I: Biotechnology for Biofuels, Bind 9, Nr. 16, 2016.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Combination of ensiling and fungal delignification as effective wheat straw pretreatment
AU - Thomsen, Sune Tjalfe
AU - Londoño, Jorge E G
AU - Ambye-Jensen, Morten
AU - Heiske, Stefan
AU - Kádár, Zsófia
AU - Meyer, Anne S.
PY - 2016
Y1 - 2016
N2 - Background: 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. Results: 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. Conclusion: The combination of the L. buchneri ensiling and C. subvermispora WRF treatment provided a significant improvement in the pretreatment effect on WS. This combined biopretreatment produced particularly promising results for ethanol production.
AB - Background: 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. Results: 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. Conclusion: The combination of the L. buchneri ensiling and C. subvermispora WRF treatment provided a significant improvement in the pretreatment effect on WS. This combined biopretreatment produced particularly promising results for ethanol production.
KW - Biogas
KW - Ceriporiopsis subvermispora
KW - Ensiling
KW - Ethanol
KW - Lignocellulose
KW - Pretreatment
KW - White rot
U2 - 10.1186/s13068-016-0437-x
DO - 10.1186/s13068-016-0437-x
M3 - Journal article
C2 - 26819628
AN - SCOPUS:84956708070
VL - 9
JO - Biotechnology for Biofuels
JF - Biotechnology for Biofuels
SN - 1754-6834
IS - 16
ER -
ID: 178284608