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Linking CFD and kinetic models in anaerobic digestion using a compartmental model approach

(2020) PROCESSES. 8(6).
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Abstract
Understanding mixing behavior and its impact on conversion processes is essential for the operational stability and conversion efficiency of anaerobic digestion (AD). Mathematical modelling is a powerful tool to achieve this. Direct linkage of Computational Fluid Dynamics (CFD) and the kinetic model is, however, computationally expensive, given the stiffness of the kinetic model. Therefore, this paper proposes a compartmental model (CM) approach, which is derived from a converged CFD solution to understand the performance of AD under non-ideal mixing conditions and with spatial variation of substrates, biomass, pH, and specific biogas and methane production. To quantify the effect of non-uniformity on the reactor performance, the CM implements the Anaerobic Digestion Model 1 (ADM1) in each compartment. It is demonstrated that the performance and spatial variation of the biochemical process in a CM are significantly different from a continuously stirred tank reactor (CSTR) assumption. Hence, the assumption of complete mixed conditions needs attention concerning the AD performance prediction and biochemical process non-uniformities.
Keywords
BIOMATH, ADM1, CFD, CM, kinetics, non-Newtonian fluid, spatial variation, RHEOLOGICAL CHARACTERIZATION, FLOW, SIMULATION, SLUDGE, WASTE, INTEGRATION, SUBSTRATE

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MLA
Tobo, Yohannis, et al. “Linking CFD and Kinetic Models in Anaerobic Digestion Using a Compartmental Model Approach.” PROCESSES, vol. 8, no. 6, 2020, doi:10.3390/pr8060703.
APA
Tobo, Y., Bartacek, J., & Nopens, I. (2020). Linking CFD and kinetic models in anaerobic digestion using a compartmental model approach. PROCESSES, 8(6). https://doi.org/10.3390/pr8060703
Chicago author-date
Tobo, Yohannis, Jan Bartacek, and Ingmar Nopens. 2020. “Linking CFD and Kinetic Models in Anaerobic Digestion Using a Compartmental Model Approach.” PROCESSES 8 (6). https://doi.org/10.3390/pr8060703.
Chicago author-date (all authors)
Tobo, Yohannis, Jan Bartacek, and Ingmar Nopens. 2020. “Linking CFD and Kinetic Models in Anaerobic Digestion Using a Compartmental Model Approach.” PROCESSES 8 (6). doi:10.3390/pr8060703.
Vancouver
1.
Tobo Y, Bartacek J, Nopens I. Linking CFD and kinetic models in anaerobic digestion using a compartmental model approach. PROCESSES. 2020;8(6).
IEEE
[1]
Y. Tobo, J. Bartacek, and I. Nopens, “Linking CFD and kinetic models in anaerobic digestion using a compartmental model approach,” PROCESSES, vol. 8, no. 6, 2020.
@article{8666040,
  abstract     = {{Understanding mixing behavior and its impact on conversion processes is essential for the operational stability and conversion efficiency of anaerobic digestion (AD). Mathematical modelling is a powerful tool to achieve this. Direct linkage of Computational Fluid Dynamics (CFD) and the kinetic model is, however, computationally expensive, given the stiffness of the kinetic model. Therefore, this paper proposes a compartmental model (CM) approach, which is derived from a converged CFD solution to understand the performance of AD under non-ideal mixing conditions and with spatial variation of substrates, biomass, pH, and specific biogas and methane production. To quantify the effect of non-uniformity on the reactor performance, the CM implements the Anaerobic Digestion Model 1 (ADM1) in each compartment. It is demonstrated that the performance and spatial variation of the biochemical process in a CM are significantly different from a continuously stirred tank reactor (CSTR) assumption. Hence, the assumption of complete mixed conditions needs attention concerning the AD performance prediction and biochemical process non-uniformities.}},
  articleno    = {{703}},
  author       = {{Tobo, Yohannis and Bartacek, Jan and Nopens, Ingmar}},
  issn         = {{2227-9717}},
  journal      = {{PROCESSES}},
  keywords     = {{BIOMATH,ADM1,CFD,CM,kinetics,non-Newtonian fluid,spatial variation,RHEOLOGICAL CHARACTERIZATION,FLOW,SIMULATION,SLUDGE,WASTE,INTEGRATION,SUBSTRATE}},
  language     = {{eng}},
  number       = {{6}},
  pages        = {{12}},
  title        = {{Linking CFD and kinetic models in anaerobic digestion using a compartmental model approach}},
  url          = {{http://dx.doi.org/10.3390/pr8060703}},
  volume       = {{8}},
  year         = {{2020}},
}

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