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Formulation of the CBC-Model for Modelling the Contaminants and Footprints in Natural Attenuation of BTEX

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Abstract

This paper provides the details of the Coupled Biological and Chemical (CBC)model for representing in situ bioremediation of BTEX. The CBC modelcontains novel features that allow it to comprehensively track the footprints ofBTEX bioremediation, even when the fate of those footprints is confounded byabiotic reactions and complex interactions among different kinds of microorganisms.To achieve this comprehensive tracking of all the footprints, the CBC modelcontains important new biological features and key abiotic reactions. The biologicalmodule of the CBC-model includes these important new aspects: (1) it separatesBTEX fermentation from methanogenesis, (2) it explicitly includes biomass as asink for electrons and carbon, (3) it has different growth rates for each biomasstype, and (4) it includes inhibition of the different reactions by other electronacceptors and by sulfide toxicants. The chemical module of the CBC-modelincludes abiotic reactions that affect the footprints of the biological reactions.In particular, the chemical module describes the precipitation/dissolution ofCaCO3, Fe2O3, FeS, FeS2, and S°. The kinetics for the precipitation/dissolution reactions follow the critical review in Maurer and Rittmann (2003a).

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Authors
  1. Max Maurer
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  2. Bruce E. Rittmann
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Maurer, M., Rittmann, B.E. Formulation of the CBC-Model for Modelling the Contaminants and Footprints in Natural Attenuation of BTEX. Biodegradation 15, 475–485 (2004). https://doi.org/10.1023/B:BIOD.0000044588.86054.05

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