Enhanced hydrolysis and acidification of cellulose at high loading for methane production via anaerobic digestion supplemented with high mobility nanobubble water

Xuezhi Wang; Tian Yuan; Zitao Guo; Hanlin Han; Zhongfang Lei; Kazuya Shimizu; Zhenya Zhang; Duu-Jong Lee

doi:10.1016/j.biortech.2019.122499

Author(s)

Xuezhi Wang
Tian Yuan
Zitao Guo
Hanlin Han
Zhongfang Lei
Kazuya Shimizu
Zhenya Zhang

Detail(s)

Original language	English
Article number	122499
Journal / Publication	Bioresource Technology
Volume	297
Online published	29 Nov 2019
Publication status	Published - Feb 2020
Externally published	Yes

Link(s)

DOI	DOI https://doi.org/10.1016/j.biortech.2019.122499 Final Published version
	Check@CityULib
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85076029723&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(988839fc-039e-48dd-9fd8-d87194de37c2).html

Abstract

In this study, CH₄ production from anaerobic digestion (AD) of refractory cellulose was investigated at a high loading of 3.5 (VS_cellulose/VS_inoculum) under nanobubble water (NBW) addition. A longer proton spin-spin relaxation time (2611–2906 ms) of NBW during 35 days’ storage reflected its high mobility and diffusion of water molecules. Higher volatile fatty acids were yielded at the hydrolysis-acidification stage under NBW addition. Methanogenesis tests showed that Air-NBW and CO₂-NBW supplementation accelerated the utilization of crystalline cellulose, achieving methane yields of 264 and 246 mL CH₄/g-VS_reduced, increasing by 18% and 10% compared to deionized water addition (the control), respectively. In addition, under NBW addition the cellulose crystallinity reduction was enhanced by 14–20% with microbial community being enriched with hydrolytic and methanogenic bacteria. Results from this work suggest that NBW environment with no chemical addition and relatively low energy consumption is advantageous for enhanced AD process of cellulosic biomass.

Research Area(s)

Anaerobic digestion, Cellulose crystallinity, Methane production, Nanobubble water, Proton spin-spin relaxation time

Citation Format(s)

[ RIS ] [ BibTeX ]

Enhanced hydrolysis and acidification of cellulose at high loading for methane production via anaerobic digestion supplemented with high mobility nanobubble water. / Wang, Xuezhi; Yuan, Tian; Guo, Zitao et al.
In: Bioresource Technology, Vol. 297, 122499, 02.2020.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review

Wang, X, Yuan, T, Guo, Z, Han, H, Lei, Z, Shimizu, K, Zhang, Z & Lee, D-J 2020, 'Enhanced hydrolysis and acidification of cellulose at high loading for methane production via anaerobic digestion supplemented with high mobility nanobubble water', Bioresource Technology, vol. 297, 122499. https://doi.org/10.1016/j.biortech.2019.122499

Wang, X., Yuan, T., Guo, Z., Han, H., Lei, Z., Shimizu, K., Zhang, Z., & Lee, D-J. (2020). Enhanced hydrolysis and acidification of cellulose at high loading for methane production via anaerobic digestion supplemented with high mobility nanobubble water. Bioresource Technology, 297, [122499]. https://doi.org/10.1016/j.biortech.2019.122499

Wang X, Yuan T, Guo Z, Han H, Lei Z, Shimizu K et al. Enhanced hydrolysis and acidification of cellulose at high loading for methane production via anaerobic digestion supplemented with high mobility nanobubble water. Bioresource Technology. 2020 Feb;297:122499. Epub 2019 Nov 29. doi: 10.1016/j.biortech.2019.122499

Wang, Xuezhi ; Yuan, Tian ; Guo, Zitao et al. / Enhanced hydrolysis and acidification of cellulose at high loading for methane production via anaerobic digestion supplemented with high mobility nanobubble water. In: Bioresource Technology. 2020 ; Vol. 297.