Hydrogen production from acidogenic food waste fermentation using untreated inoculum: Effect of substrate concentrations

Yunhui Pu, Jialing Tang, Xiaochang C. Wang, Yisong Hu, Jin Huang, Yonggang Zeng, Huu Hao Ngo, Yuyou Li

研究成果: Article査読

13 被引用数 (Scopus)

抄録

The effect of substrate concentrations (0, 7.5, 15, 22.5, 30, and 37.5 g-VS/L) on hydrogen production from heat-treated and fresh food waste (FW) using untreated inoculums was investigated in this work. The highest hydrogen yield (75.3 mL/g-VS) was obtained with heat-treated FW at 15 g-VS/L. Lower substrate content could not provide enough organic matter for hydrogen fermentation, while higher substrate concentrations shifted the metabolic pathways from hydrogen fermentation to lactic acid fermentation by enriching the lactic acid bacteria (LAB), which lowered the slurry pH and decreased enzyme activity, resulting in a lower chemical oxygen demand (COD), volatile solid (VS), carbohydrate removal rate, and hydrogen yield. Compared with fresh FW, heat-treated FW is preferred for biohydrogen process with acetate as the main organic product. Additionally, at the optimal concentration (15 g-VS/L) using fresh FW, lactic acid is first accumulated and then degraded to produce hydrogen with butyrate as the main metabolite.

本文言語English
ページ(範囲)27272-27284
ページ数13
ジャーナルInternational Journal of Hydrogen Energy
44
50
DOI
出版ステータスPublished - 2019 10 18

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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