Process performance and modelling of anaerobic digestion using source-sorted organic household waste

Benyamin Khoshnevisan, Panagiotis Tsapekos, Merlin Alvarado-Morales, Irini Angelidaki*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Three distinctive start-up strategies of biogas reactors fed with source-sorted organic fraction of municipal solid waste were investigated to reveal the most reliable procedure for rapid process stabilization. Moreover, the experimental results were compared with mathematical modeling outputs. The initial inoculations to start-up the reactors were 10, 50 and 100% of the final working volume. While a constant feeding rate of 7.8gVS/d was considered for the control reactor, the organic loading rate for fed-batch reactors with 10 and 50% inoculation was progressively increased during a period of 60 and 13days, respectively. The results clearly demonstrated that an exponentially feeding strategy, considering 50% inoculation relative to final volume, can significantly decrease the alternatively prolonged period to reach steady conditions, as observed by high biogas and methane production rates. The combination of both experimental and modelling/simulation succeeded in optimizing the start-up process for anaerobic digestion of biopulp under mesophilic conditions.
Original languageEnglish
JournalBioresource Technology
Volume247
Pages (from-to)486-495
Number of pages10
ISSN0960-8524
DOIs
Publication statusPublished - 2018

Keywords

  • Anaerobic digestion
  • Biogas
  • Mathematical modeling
  • Source-sorted organic household waste
  • Start-up period

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