Modeling the dynamic volatile fatty acids profiles with pH and hydraulic retention time in an anaerobic baffled reactor during the startup period

En Shi, Jianzheng Li, Shao Yuan Leu, Philip Antwi

Research output: Journal article publicationJournal articleAcademic researchpeer-review

13 Citations (Scopus)


The calibration of inhibition parameter for propionate uptake effectively improved the prediction accuracy of VFAs. The developed model could simulate the VFAs profiles very well no matter the observable change of pH or/and HRT. The simulation results indicated that both H2-producing acetogenesis and methanogenesis in the ABR would be inhibited with a pH less than 4.61, and the propionate oxidation could be thermodynamically restricted even with a neutral pH. A decreased HRT would enhanced the acidogenesis and H2-producing acetogenesis in the first 3 compartments, but no observable increase in effluent VFAs could be found due to the synchronously enhanced methanogenesis in the last compartment.
Original languageEnglish
Pages (from-to)49-58
Number of pages10
JournalBioresource Technology
Publication statusPublished - 1 Dec 2016


  • Anaerobic baffled reactors (ABRs)
  • Hydraulic retention time (HRT)
  • Mathematical model
  • pH
  • Volatile fatty acids (VFAs)

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Waste Management and Disposal

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