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Effect of mixing of waste biomass in anaerobic digesters for production of biogas

  • Biogas technology is an important renewable bioenergy producer. The biogas generating process needs to be optimized to minimise the energy consumption due to the stirring of biomass slurry. Numerical simulations and laboratory experiments are economically and practically preferred over investigations of industrial scale biogas plants. Additionally, a strategic approach to model the reality in scientific laboratories is to use a rheological valid artificial chemical substrate to replace real biomass. The proposes of this study were (i) to investigate the mixing process in a 1:12 scaled-down home-made laboratory digester filled with a 0.3 wt% water-cellulose solution, (ii) to simulate the mixing process in the laboratory-scale digester using a computational fluid dynamics model, (iii) to validate the model by comparison of the simulation with laboratory experiments results obtained on the laboratory digester. Optical and acoustic measurements on the flow velocity inside the digester during the mixing process of the water-celluloseBiogas technology is an important renewable bioenergy producer. The biogas generating process needs to be optimized to minimise the energy consumption due to the stirring of biomass slurry. Numerical simulations and laboratory experiments are economically and practically preferred over investigations of industrial scale biogas plants. Additionally, a strategic approach to model the reality in scientific laboratories is to use a rheological valid artificial chemical substrate to replace real biomass. The proposes of this study were (i) to investigate the mixing process in a 1:12 scaled-down home-made laboratory digester filled with a 0.3 wt% water-cellulose solution, (ii) to simulate the mixing process in the laboratory-scale digester using a computational fluid dynamics model, (iii) to validate the model by comparison of the simulation with laboratory experiments results obtained on the laboratory digester. Optical and acoustic measurements on the flow velocity inside the digester during the mixing process of the water-cellulose solutions indicate that the model based on computational fluid dynamics is valid. The data are presented and discussed in the paper.show moreshow less

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Metadaten
Author:Fosca ContiORCiD, Leonhard Wiedemann, Abdessamad Saidi, Markus Goldbrunner
Language:English
Document Type:Article
Conference:2018 3rd International Conference on Energy Materials and Applications, Salamanca (Spain), 09.-11.05.2018
Year of first Publication:2018
published in (English):IOP Conference Series: Materials Science and Engineering
Publisher:IOP Publishing
Place of publication:London
ISSN:1757-899X
Volume:2018
Issue:446
Pages:6
Article Number:012011
Review:peer-review
Open Access:ja
Version:published
URN:urn:nbn:de:bvb:573-28021
Related Identifier:https://doi.org/10.1088/1757-899X/446/1/012011
Faculties / Institutes / Organizations:Fakultät Maschinenbau
Institut für neue Energie-Systeme (InES)
Licence (German):License Logo Creative Commons BY 3.0
Release Date:2022/09/01