Vibeke Bredvold Karlsen
Department of Process, Energy and Environmental Technology, University of South-Eastern Norway
Nirmal Ghimire
Department of Process, Energy and Environmental Technology, University of South-Eastern Norway
Rune Bakke
Department of Process, Energy and Environmental Technology, University of South-Eastern Norway
Wenche Hennie Bergland
Department of Process, Energy and Environmental Technology, University of South-Eastern Norway
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https://doi.org/10.3384/ecp20176287Published in: Proceedings of The 61st SIMS Conference on Simulation and Modelling SIMS 2020, September 22-24, Virtual Conference, Finland
Linköping Electronic Conference Proceedings 176:40, p. 287-292
Published: 2021-03-03
ISBN: 978-91-7929-731-2
ISSN: 1650-3686 (print), 1650-3740 (online)
Lignocellulosic biomass is a sustainable and renewable source for both solids like biochar and biomethane by anaerobic digestion (AD). Hot water extraction (HWE) improves the total utilization of the biomass and produces a hydrolysate rich in hemicellulosic sugars with characteristics that needs to be understood. A study of the AD process in batch reactors with synthetic substrates composed of hemicellulosic sugars was performed and modelled using the standard IWA Anaerobic Digestion Model No. 1 (ADM1). Simulations were also performed using three strategies: 1) varying the stoichiometry for monosaccharide degradation, 2) varying the maximum uptake rate of the monosaccharide degrading organisms and 3) including a first order rate limiting step. The ADM1 model is a good tool but gave initially moderate agreement with the experimental results. The first two strategies did not improve the simulations but it improved significantly upon incorporating a rate limiting step, thereby simulating possible effects based on types of microorganisms present and diffusion limitations.
anaerobic digestion, lignocellulosic hydrolysate, hemicellulosic sugars, ADM1, first order step
