Dark fermentation production of volatile fatty acids from glucose with biochar amended biological consortium

Jia Hsun Lu, Chuan Chen, Chihpin Huang, Huichuan Zhuang, Shao Yuan Leu, Duu Jong Lee*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Effects of adding biochars on dark fermentation production of volatile fatty acids (VFAs) from glucose were investigated. Nine biochars were synthesized and applied, together with an activated carbon, as the testing amendment to enhance preferable fermentation. Biochars were porous materials with internal pores and excess surface functional groups, which would lead to enrichment of acetate over butyrate in the VFA production. Biochar coconut and biochar longan shell showed excess functional groups and high bulk internal crystallinity, presented 109.6% and 71.8% enrichments of acetate production, respectively. The syntrophic growth of fermentative bacteria and homoacetogens on biochar surfaces via direct interspecies electron transfer mechanism was assumed to interpret the noted enhanced acetate production. The excess functional groups on biochar surface to facilitate biofilm development and the high crystallinity of biochar bulk to ease electron transfer favored the production of acetate.

Original languageEnglish
Article number122921
JournalBioresource Technology
Volume303
DOIs
StatePublished - May 2020

Keywords

  • Biochar
  • DIET
  • Fermentative consortium
  • Property
  • Volatile fatty acids

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