Synergistic Effect of Hydrothermal Pretreatment and Addition of Oyster Shell on Dark Fermentation of Food Waste and Kinetic Evaluation with Multiple Models

Yufang Wei, Xitong Wang, Zhengui Shi, Shuai Yuan, Hairong Yuan, Xiujin Li

Research output: Journal PublicationArticlepeer-review

Abstract

Abstract: Hydrogen (H2) production, acidification performance, and kinetic modeling of dark fermentation (DF) of food waste (FW) with hydrothermal pretreatment (HTP) and addition of oyster shell (OS) were investigated in this study. A cumulative H2 yield of 52.5 mL g VS−1 with an improvement of 147.9% was obtained in the DF of FW with HTP and the addition of OS. Acidification performance analysis showed an upward trend of volatile fatty acids (VFAs) from the start-up to day 3 or day 6, and then an opposite trend was observed for the remaining time of the DF process. Butyric and acetic fermentation dominated DF. Moreover, the DF process could be well fitted by the five kinetic models, and its quantitative rank was first-order > monomolecular > modified Gompertz > logistic > Fitzhugh. Correlation analysis indicated that the H2 yield was affected by both pH and VFAs. This study demonstrated a novel strategy by combining HTP and OS addition for enhancing H2 production from FW using DF. Graphical Abstract: [Figure not available: see fulltext.]

Original languageEnglish
JournalWaste and Biomass Valorization
DOIs
Publication statusAccepted/In press - 2022
Externally publishedYes

Keywords

  • Dark fermentation
  • Food waste
  • Hydrogen production
  • Hydrothermal pretreatment
  • Kinetic model

ASJC Scopus subject areas

  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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