Do two-phase biogas plants separate anaerobic digestion phases? - A mathematical model for the distribution of anaerobic digestion phases among reactor stages

Ivo Muha, Simon Zielonka, Andreas Lemmer, Mandy Schönberg, Bernd Linke, Alfio Grillo, Gabriel Wittum*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

In this article a mathematical model is introduced, which estimates the distribution of the four anaerobic digestion phases (hydrolysis, acidogenesis, acetogenesis and methanogenesis) that occur among the leach bed reactor and the anaerobic filter of a biogas plant. It is shown that only the hydrolysis takes place in the first stage (leach bed reactor), while all other anaerobic digestion phases take place in both reactor stages. It turns out that, besides the usually measured raw materials of the acetogenesis and the methanogenesis phases (organic acids), it is also necessary to analyze the process liquid for raw materials of the acidogenesis phase, i.e., sugars, fatty acids, amino acids, etc. The introduced model can be used to monitor the inhibition of the anaerobic digestion phases in reactor stages and can, thus, help to improve the control system of biogas plants.

Original languageEnglish (US)
Pages (from-to)414-418
Number of pages5
JournalBioresource Technology
Volume132
DOIs
StatePublished - Jan 1 2013

Keywords

  • ADM1
  • Anaerobic digestion
  • Leach-bed process
  • Mathematical modeling
  • Two-phase

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Waste Management and Disposal

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