Investigating hydrothermal pretreatment of food waste for two-stage fermentative hydrogen and methane co-production

Lingkan Ding, Jun Cheng, Dan Qiao, Liangchen Yue, Gyokuyu Ri, Junhu Zhou, Kefa Cen

Research output: Contribution to journalArticlepeer-review

107 Citations (Scopus)


The growing amount of food waste (FW) in China poses great pressure on the environment. Complex solid organics limit the hydrolysis of FW, hence impairing anaerobic digestion. This study employed hydrothermal pretreatment (HTP) to facilitate the solubilization of FW. When HTP temperature increased from 100 to 200 °C, soluble carbohydrate content first increased to a peak at 140 °C and then decreased, whereas total carbohydrate content was negatively correlated with increasing temperature due to the enhanced degradation and Maillard reactions. Protein solubilization was dramatically promoted after HTP, whereas protein degradation was negligibly enhanced. The hydrogen and methane yields from hydrothermally pretreated FW under the optimum condition (140 °C, 20 min) through two-stage fermentation were 43.0 and 511.6 mL/g volatile solids, respectively, resulting in an energy conversion efficiency (ECE) of 78.6%. The ECE of pretreated FW was higher than that of untreated FW by 31.7%.

Original languageEnglish
Pages (from-to)491-499
Number of pages9
JournalBioresource Technology
Publication statusPublished - 2017 Jan 1


  • Food waste
  • Hydrogen
  • Hydrothermal pretreatment
  • Methane
  • Solubilization

ASJC Scopus subject areas

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


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