Modeling and optimization of biogas production in a batch bioreactor

Authors

  • Tina Kegl Faculty of Chemistry and Chemical Engineering University of Maribor Smetanova 17, SI-2000 Maribor (Slovenia) Phone/Fax number: +386 2 2294 454 Author
  • Eloisa Torres-Jimenez Departamento de Ingeniería Mecánica y Minera Universidad de Jaén Edificio A3, despacho 013, Campus las Lagunillas, s/n - 23071 – Jaén (Spain) Phone/Fax number: +34 953 21 28 67 Author

DOI:

https://doi.org/10.24084/repqj21.319

Keywords:

BioModel,, model parameters calibration, activity set optimization procedure, gradient-based optimization algorithm, variable process conditions

Abstract

Ever  increasing  demands  for  renewable  energy sources  are  the  driving  force  for  the  development  of  waste management  technologies  such  as  anaerobic  digestion  (AD) technology. For AD process understanding and optimization the numerical  simulations  provide  a  useful  tool.  Therefore,  in  this work,  the  main  attention  is  focused  on  the  development  of  an efficient  and  stable  optimization  approach.  The  optimization procedure is coupled with a suitable mechanistically inspired self-developed   BioModel.   For   BioModel   calibration,   a   special procedure was developed which incorporates the used BioModel, a    sensitivity    analysis,    and    a    gradient-based    optimization algorithm.  The  results  of  numerical  simulation,  obtained  by  the AD  of  various  animal  manures  in  a  batch  lab-scale  bioreactor, confirm  the  reliability  of  BioModel  and  the  efficiency  of  the presented  calibration  procedure.  Furthermore,  the  results  of  AD process optimization show that the biogas quantity and quality as well  as  energy  used  up  for  bioreactor  heating  can  be  improved essentially  when  amount  of  added  bacteria,  temperature  and  pH values are optimized properly. 

Downloads

Published

2024-01-08

Issue

Vol. 21 No. 3 (2023)

Section

Articles