Biogas Production Potential and Kinetics of Microwave and Conventional Thermal Pretreatment of Grass |
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Authors: | Lianhua Li Xiaoying Kong Fuyu Yang Dong Li Zhenhong Yuan Yongming Sun |
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Institution: | (1) Guangzhou Institute of Energy Conversion, Key Laboratory of Renewable Energy and Gas Hydrate, Chinese Academy of Sciences, No.2, Nengyuan Rd, Wushan, Tianhe District, Guanzhou, 510640, People’s Republic of China;(2) Grassland Institute, China Agricultural University, Beijing, 100094, People’s Republic of China; |
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Abstract: | Pretreatment methods play an important role in the improvement of biogas production from the anaerobic digestion of energy
grass. In this study, conventional thermal and microwave methods were performed on raw material, namely, Pennisetum hybrid, to analyze the effect of pretreatment on anaerobic digestion by the calculation of performance parameters using Logistic
function, modified Gompertz equation, and transference function. Results indicated that thermal pretreatment improved the
biogas production of Pennisetum hybrid, whereas microwave method had an adverse effect on the performance. All the models fit the experimental data with
R
2 > 0.980, and the Reaction Curve presented the best agreement in the fitting process. Conventional thermal pretreatment showed
an increasing effect on maximum production rate and total methane produced, with an improvement of around 7% and 8%, respectively.
With regard to microwave pretreatment, maximum production rate and total methane produced decreased by 18% and 12%, respectively. |
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Keywords: | |
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