Assessment of organosolv, hydrothermal, and combined organosolv and hydrothermal with enzymatic pretreatment to increase the production of biogas from Napier grass and Napier silage
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Issued Date
2022-01-01
Resource Type
ISSN
09601481
eISSN
18790682
Scopus ID
2-s2.0-85116942808
Journal Title
Renewable Energy
Volume
181
Start Page
1237
End Page
1249
Rights Holder(s)
SCOPUS
Bibliographic Citation
Renewable Energy Vol.181 (2022) , 1237-1249
Suggested Citation
Jomnonkhaow U., Sittijunda S., Reungsang A. Assessment of organosolv, hydrothermal, and combined organosolv and hydrothermal with enzymatic pretreatment to increase the production of biogas from Napier grass and Napier silage. Renewable Energy Vol.181 (2022) , 1237-1249. 1249. doi:10.1016/j.renene.2021.09.099 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/84572
Title
Assessment of organosolv, hydrothermal, and combined organosolv and hydrothermal with enzymatic pretreatment to increase the production of biogas from Napier grass and Napier silage
Author(s)
Other Contributor(s)
Abstract
The effects of organosolv, hydrothermal, combined organosolv, and hydrothermal processes followed by enzyme pretreatment on Napier grass and silage were evaluated for their efficacy in enhancing methane production. The pretreatment of Napier grass and silage by organosolv followed by enzymatic hydrolysis significantly improved methane yields by 1.9–2.0 times compared with untreated Napier grass and silage. In addition, organosolv-treated Napier grass followed by enzymatic hydrolysis yielded 7.8% more methane (410 mL/g-volatile solidadded (VSadded)) than organosolv-treated silage followed by enzymatic hydrolysis (378 mL/g-VSadded). Organosolv pretreatment enhanced lignin removal, while hydrothermal pretreatment effectively hydrolyzed hemicellulose. Delignification and reduction of crystallinity during organosolv improve the degradability of Napier grass and silage, resulting in their significantly higher energy recovery of 14.8 and 13.6 kJ/g-VSadded, respectively, which were higher than the energy recovery attained from the hydrothermal process.