Process mechanisms of nanobubble technology enhanced hydrolytic acidification of anaerobic digestion of lignocellulosic biomass

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dc.contributor.authorZhu, Yali
dc.contributor.authorLyu, Tao
dc.contributor.authorLi, Daoyu
dc.contributor.authorZhang, Zongqin
dc.contributor.authorGuo, Jianbin
dc.contributor.authorLi, Xin
dc.contributor.authorXiong, Wei
dc.contributor.authorDong, Renjie
dc.contributor.authorWang, Siqi
dc.date.accessioned2024-01-10T09:14:57Z
dc.date.available2024-01-10T09:14:57Z
dc.date.issued2023-12-21
dc.description.abstractThis study explored the efficiency of CO2-, N2-, and H2- nanobubble treatment in anaerobic digestion (AD) of rice straw, with a focus on the processes and metabolic pathways of hydrolytic acidification, and revealed the underlying mechanisms. Mechanistic investigations revealed that nanobubbles, particularly CO2 nanobubbles, significantly increased the degradation of amorphous cellulose, resulting in higher levels of soluble carbohydrates (6.27 % – 11.13 %), VFAs (4.39 % – 24.50 %), and a remarkable cumulative H2 yield (74 – 94 times) Microbial community analysis indicated that the CO2 nanobubble promoted the growth of acidifying bacterial communities, such as Mobilitalea, unclassified_f_Lachnospiraceae, and Bacteroides. This indicates that the introduction of CO2 nanobubbles improved the total abundance of predicted functional enzymes were increased by 14 %, resulting in the production of more easily degradable intermediates. Based on the analysis of total methane production and kinetic analysis, it can be concluded that nanobubble addition enhanced methane production levels of 4.22 %−7.79 % with lower lag time (λ) (0.88–1.06 day) compared to the control group (1.09 day). The results also elucidated changes in relative enzymatic activities involved in the bioconversion of cellulose and hemicellulose during the hydrolysis stage with nanobubble treatment. This work is more beneficial for understanding the promoting effect and mechanism of nanobubbles on AD, facilitating the more precise application of nanobubble technology in the field of renewable energy.en_UK
dc.identifier.citationZhu Y, Lyu T, Li D, et al., (2024) Process mechanisms of nanobubble technology enhanced hydrolytic acidification of anaerobic digestion of lignocellulosic biomass. Chemical Engineering Journal, Volume 480, January 2024, Article Number 147956en_UK
dc.identifier.eissn1873-3212
dc.identifier.issn1385-8947
dc.identifier.urihttps://doi.org/10.1016/j.cej.2023.147956
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/20630
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectbioresources recoveryen_UK
dc.subjecthydrolytic acidificationen_UK
dc.subjectmicro-nanobubble technologyen_UK
dc.subjectrenewable energyen_UK
dc.subjectrice strawen_UK
dc.subjectsustainable waste managementen_UK
dc.titleProcess mechanisms of nanobubble technology enhanced hydrolytic acidification of anaerobic digestion of lignocellulosic biomassen_UK
dc.typeArticleen_UK
dcterms.dateAccepted2023-12-05

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