Bio-based carbon materials with multiple functional groups and graphene structure to boost methane production from ethanol anaerobic digestion. (January 2022)

• Record Type: Journal Article
• Authors: Li, Yeqing; Wang, Zhenxin; Jiang, Zhuoliang; Feng, Lu; Pan, Junting; Zhu, Mingyu; Ma, Chengjie; Jing, Zhangmu; Jiang, Hao; Zhou, Hongjun; Sun, Hui; Liu, Hongbin
• Is Part Of: Bioresource technology. Volume 344:Part B(2022)
• Publication Date: 2022-01
• Subjects: Biochar -- Hydrochar -- Anaerobic digestion -- Direct interspecies electron transfer -- Ethanol; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2021.126353
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Changing properties to explore biochar on methane production of anaerobic digestion. Surface area and ordered graphitization do not influence methane production. Aromatic functional groups have a major effect on electron transfer. Uniform dispersion provides stable environment for microorganisms. Abstract: This study evaluated the effects of bio-based carbon materials on methane production by anaerobic digestion. The results showed that biochar and hydrochar can promote cumulative methane yield by 15% to 29%. However, there was no statistical significance ( p > 0.05) between hydrochar and biochar produced at different temperature on methane production. 16S rRNA gene sequencing and bioinformatics analysis showed that biochar and hydrochar enriched microorganism that might participate in direct interspecies electron transfer (DIET) such as Pseudomonadaceae, Bacillaceae, and Clostridiaceae . The the surface properties of the modified biochar were characterized with BET, Raman, FTIR and XPS. Bio-based carbon materials with uniform dispersion provided a stable environment for the DIET of microorganisms and electrons are transferred through aromatic functional groups on the surface of materials. This study reveals bio-based carbon materials surface properties on methane production in anaerobic digestion and provides a new approach to recycling spent coffee grounds.