Anaerobic digestion of food waste through the operation of a mesophilic two-phase pilot scale digester - Assessment of variable loadings on system performance

S. J. Grimberg, D. Hilderbrandt, Marta Kinnunen, S. Rogers

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Single and two-phase operations were compared at mesophilic operating conditions using a digester system consisting of three 5-m3 reactors treating food waste generated daily within the university campus kitchens. When normalizing the methane production to the daily feedstock characteristics, significantly greater methane was produced during two-phase mesophilic digestion compared to the single-stage operation (methane yield of 380 vs 446-LCH4kgVS-1; 359 vs 481-LCH4kgCOD-1 removed for single vs two stage operation). The fermentation reactor could be maintained reliably even under very low loading rates (0.79±0.16kgCODm-3d-1) maintaining a steady state pH of 5.2.
Original languageEnglish
JournalBioresource Technology
Volume178
Pages (from-to)226-229
Number of pages4
ISSN0960-8524
DOIs
Publication statusPublished - 2015
Externally publishedYes

Keywords

  • Food waste
  • Two-stage anaerobic digestion
  • Loading
  • Methane
  • Digester systems
  • Methane production
  • Operating condition
  • Two phase operation
  • Two-stage anaerobic digestions
  • University campus
  • Variable loadings
  • Anaerobic digestion

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