Development, identification and validation of a mathematical model of anaerobic digestion of sewage sludge focusing on H2S formation and transfer

F. Carrera-Chapela, A. Donoso-Bravo, DAVID ALEJANDRO JEISON NUÑEZ, I. Díaz, J. A. Gonzalez, G. Ruiz-Filippi

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Nowadays, there are plenty of models of the anaerobic digestion process, however the impact of this odor emission on these models has received very little attention. Hydrogen sulfide (H2S) has been used as odor trace marker for odor dispersion studies which is formed by microbial action of sulfate reducing bacteria under anaerobic conditions. A mathematical model with focus on the H2S generation with a reduce number of parameters of five stages was developed. The model and parameters were calibrated and validated with experimental data from two pilot scale anaerobic reactors treating sewage sludge. The developed model is able to describe properly the dynamic behavior of this system, particularly, its gas phase composition with an accuracy of 90%, for hydrogen sulfide and carbon dioxide, and 60% for methane, within 99% of confidence.

Original languageEnglish
Pages (from-to)13-19
Number of pages7
JournalBiochemical Engineering Journal
Volume112
DOIs
StatePublished - 15 Aug 2016

Keywords

  • Anaerobic processes
  • Biogas
  • Dynamic modelling
  • Dynamic simulation
  • Modelling
  • Waste-water treatment

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