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On the optimization of biogas production in anaerobic digestion systems

Mihaela Sbarciog, Mia Loccufier UGent and Alain Vande Wauwer (2011) Preprints of the 18th IFAC World Congress. p.7150-7155
abstract
This paper presents a strategy for the optimization of biogas outflow rate in an anaerobic digestion process described by a two-population model. The methodology relies on the solution of two optimization problems: steady state optimization for determining the optimal operating point and transient optimization. The latter is solved using the maximum principle of Pontryagin. The proposed control law, which drives the process from an initial state to the optimal steady state while maximizing the biogas outflow rate, consists of switching the manipulated variable (dilution rate) from the minimum to the maximum value and then to the optimal value at well defined instants. This control law substantially increases the stability region of the optimal equilibrium point, enlarging it in some cases to almost the entire state space. Aside its efficiency, the strategy is also characterized by simplicity, being thus appropriate for implementation in real-life systems. Another important advantage is its generality: this technique may be applied to any anaerobic digestion process, for which the acidogenesis and methanogenesis are respectively characterized by Monod and Haldane kinetics.
Please use this url to cite or link to this publication:
author
organization
year
type
conference
publication status
published
subject
keyword
biotechnology, nonlinear systems, stability analysis, bang-bang, control, optimal control
in
Preprints of the 18th IFAC World Congress
pages
7150 - 7155
publisher
International Federation of Automatic Control (IFAC)
conference name
18th IFAC World Congress (IFAC 2011)
conference location
Milano, Italy
conference start
2011-08-28
conference end
2011-09-02
language
English
UGent publication?
yes
classification
C1
copyright statement
I have transferred the copyright for this publication to the publisher
id
2053336
handle
http://hdl.handle.net/1854/LU-2053336
date created
2012-02-29 22:35:29
date last changed
2012-03-29 13:08:55
@inproceedings{2053336,
  abstract     = {This paper presents a strategy for the optimization of biogas outflow rate in an anaerobic digestion process described by a two-population model. The methodology relies on the solution of two optimization problems: steady state optimization for determining the optimal operating point and transient optimization. The latter is solved using the maximum principle of Pontryagin. The proposed control law, which drives the process from an initial state to the optimal steady state while maximizing the biogas outflow rate, consists of switching the manipulated variable (dilution rate) from the minimum to the maximum value and then to the optimal value at well defined instants. This control law substantially increases the stability region of the optimal equilibrium point, enlarging it in some cases to almost the entire state space. Aside its efficiency, the strategy is also characterized by simplicity, being thus appropriate for implementation in real-life systems. Another important advantage is its generality: this technique may be applied to any anaerobic digestion process, for which the acidogenesis and methanogenesis are respectively characterized by Monod and Haldane kinetics.},
  author       = {Sbarciog, Mihaela  and Loccufier, Mia and Vande Wauwer, Alain},
  booktitle    = {Preprints of the 18th IFAC World Congress},
  keyword      = {biotechnology,nonlinear systems,stability analysis,bang-bang,control,optimal control},
  language     = {eng},
  location     = {Milano, Italy},
  pages        = {7150--7155},
  publisher    = {International Federation of Automatic Control (IFAC)},
  title        = {On the optimization of biogas production in anaerobic digestion systems},
  year         = {2011},
}

Chicago
Sbarciog, Mihaela , Mia Loccufier, and Alain Vande Wauwer. 2011. “On the Optimization of Biogas Production in Anaerobic Digestion Systems.” In Preprints of the 18th IFAC World Congress, 7150–7155. International Federation of Automatic Control (IFAC).
APA
Sbarciog, M., Loccufier, M., & Vande Wauwer, A. (2011). On the optimization of biogas production in anaerobic digestion systems. Preprints of the 18th IFAC World Congress (pp. 7150–7155). Presented at the 18th IFAC World Congress (IFAC 2011), International Federation of Automatic Control (IFAC).
Vancouver
1.
Sbarciog M, Loccufier M, Vande Wauwer A. On the optimization of biogas production in anaerobic digestion systems. Preprints of the 18th IFAC World Congress. International Federation of Automatic Control (IFAC); 2011. p. 7150–5.
MLA
Sbarciog, Mihaela , Mia Loccufier, and Alain Vande Wauwer. “On the Optimization of Biogas Production in Anaerobic Digestion Systems.” Preprints of the 18th IFAC World Congress. International Federation of Automatic Control (IFAC), 2011. 7150–7155. Print.