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

► A model for the distribution of anaerobic digestion phases is introduced. ► About 40% of acidogenesis takes place in the second stage of a leach bed process. ► There is no separation of anaerobic digestion phases in a leach bed biogas plant. ► The presented model can be used to improve the control system of biogas plants.