Temperature-phased anaerobic digestion of food waste: A comparison with single-stage digestions based on performance and energy balance

Benyi Xiao, Yu Qin, Wenzhe Zhang, Jing Wu, Hong Qiang, Junxin Liu, Yu You Li

Research output: Contribution to journalArticlepeer-review

49 Citations (Scopus)

Abstract

The temperature-phased anaerobic digestion (TPAD) of food waste was studied for the purpose of comparing with single-stage mesophilic and thermophilic anaerobic digestion. The biogas and methane yields in the TPAD during the steady period were 0.759 ± 0.115 L/g added VS and 0.454 ± 0.201 L/g added VS, which were lower than those in the two single-stage anaerobic digestion. The improper sludge retention time may be the reason for the lower biogas and methane production in TPAD. The removal of volatile solids in the TPAD was 78.55 ± 4.59% and the lowest among the three anaerobic digestion processes. The reaction ratios of the four anaerobic digestion steps in the TPAD were all lower than those in the two single-stage anaerobic digestion. The energy conversion efficiency of the degraded substrate in the TPAD was similar with those in single-stage mesophilic and thermophilic anaerobic digestion systems.

Original languageEnglish
Pages (from-to)826-834
Number of pages9
JournalBioresource Technology
Volume249
DOIs
Publication statusPublished - 2018 Feb

Keywords

  • Energy balance
  • Food waste
  • Performance
  • Single-stage anaerobic digestion
  • Temperature-phased anaerobic digestion

ASJC Scopus subject areas

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

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