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

[摘要] 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-cellulose solutions indicate that the model based on computational fluid dynamics is valid. The data are presented and discussed in the paper.

[发布机构] Institute of New Energy Systems, Technische Hochschule Ingolstadt (THI), Esplanade 10, Ingolstadt; 85049, Germany^1;Department of Chemical Sciences, University of Padova, via Marzolo 1, Padova; 35141, Italy^2

[效力级别] 材料科学 [学科分类] 材料科学（综合）

[关键词] Acoustic measurements;Anaerobic digester;Biogas technologies;Cellulose solutions;Computational fluid dynamics modeling;Laboratory experiments;Laboratory scale digesters;Strategic approaches