Working Paper Article Version 1 This version is not peer-reviewed

Development of a Modified Kinetic Method for Modelling of Biogas Produced from Biomass

Version 1 : Received: 31 October 2019 / Approved: 1 November 2019 / Online: 1 November 2019 (11:18:40 CET)

How to cite: Najafi, B.; Faizollahzadeh Ardabili, S.; Shamshirband, S.; Chau, K. Development of a Modified Kinetic Method for Modelling of Biogas Produced from Biomass. Preprints 2019, 2019110007 Najafi, B.; Faizollahzadeh Ardabili, S.; Shamshirband, S.; Chau, K. Development of a Modified Kinetic Method for Modelling of Biogas Produced from Biomass. Preprints 2019, 2019110007

Abstract

The kinetics of biogas production from biomass depends on several factors such as: carbon to nitrogen ratio (C/N), reactor temperature (T), and retention time (RT). The purpose of this study was to obtain a new model for predicting biogas production. Spent Mushroom Compost (SMC) was used to produce biogas in a batch type reactor. The experiments were carried out with different C/N ratios (12.1, 20, 30 and 40) and in both mesophilic (35°C) and thermophilic (55°C) temperatures. The results showed that the Maximum biogas production at 35°C, C/N=20 was equal to 41.9 mL/gVS and 55°C, C/N=30 was equal to 51.6 mL/gVS. By using experimental data, a new kinetic model was proposed to predict biogas production. Comparing the values of the results indicate that the total values of RMSE for Logistics, Gampartz and new kinetic models was 0.1906, 0.1830 and 0.1617, respectively. Therefore, the process of anaerobic digestion of biomass can be assumed to be just a chemical reaction, and the new kinetic model is an appropriate alternative to microbial growth models.

Subject Areas

biogas; chemical kinetics; anaerobic digestion; modelling

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