Michal Sposob
Department of Process, Energy and Environmental Technology, University College of Southeast Norway, Norway
Rune Bakke
Department of Process, Energy and Environmental Technology, University College of Southeast Norway, Norway
Carlos Dinamarca
Department of Process, Energy and Environmental Technology, University College of Southeast Norway, Norway
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http://dx.doi.org/10.3384/ecp1713841Published in: Proceedings of the 58th Conference on Simulation and Modelling (SIMS 58) Reykjavik, Iceland, September 25th – 27th, 2017
Linköping Electronic Conference Proceedings 138:5, p. 41-47
Published: 2017-09-27
ISBN: 978-91-7685-417-4
ISSN: 1650-3686 (print), 1650-3740 (online)
A model describing the simultaneous removal of
NO3- and HS- by microorganisms is presented here. The
oxidation of HS- (electron donor) can be controlled by
the appropriate dosage of NO3-. The developed model,
which includes variable process stoichiometry, attempts
to predict the distribution of sulfur oxidation products.
Stoichiometric coefficients are based on a 150 days
experimental study of temperature (25-10 ?C) and N/S
ratio (0.35-1.30) effects. The model can be used as a
prediction tool for autotrophic denitrification with HS-.
Elemental sulfur production is included in the
mathematical model, however, its accumulation and
release (as SO42-) with increasing feed N/S ratio (e.g.
leading to higher effluent than feed total sulfur mass at
N/S = 1.30) is not simulated. A conceptual model to
account for biological accumulation and release of
elemental sulfur is proposed here.
autotrophic denitrification, elemental sulfur
production, mathematical modeling, sulfate production
