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

Yeqing Li, Zhenxin Wang, Zhuoliang Jiang, Lu Feng, Junting Pan*, Mingyu Zhu, Chengjie Ma, Zhangmu Jing, Hao Jiang, Hongjun Zhou, Hui Sun, Hongbin Liu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

49 Citations (Scopus)

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.

Original languageEnglish
Article number126353
JournalBioresource Technology
Volume344
DOIs
Publication statusPublished - Jan 2022
Externally publishedYes

Keywords

  • Anaerobic digestion
  • Biochar
  • Direct interspecies electron transfer
  • Ethanol
  • Hydrochar

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Li, Y., Wang, Z., Jiang, Z., Feng, L., Pan, J., Zhu, M., Ma, C., Jing, Z., Jiang, H., Zhou, H., Sun, H., & Liu, H. (2022). Bio-based carbon materials with multiple functional groups and graphene structure to boost methane production from ethanol anaerobic digestion. Bioresource Technology, 344, Article 126353. https://doi.org/10.1016/j.biortech.2021.126353