Journal
BIORESOURCE TECHNOLOGY
Volume 368, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2022.128322
Keywords
Biodegradability; Digester stability; Biomass value
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Thermal analysis can predict biogas/methane yields and the biodegradability of biomass affects these yields. This study developed a bioconversion model based on thermogravimetry and used a regression model to predict biogas and methane yields for different substrates. The results showed that this prediction technique has good accuracy and can be an alternative to other models.
Biodegradability of biomass constituents is the reason for the gap between theoretical biogas/methane yield and the maximum yield obtainable in bioconversion. The prediction of biogas/methane yields by applying thermal analysis is a relatively new development in this field. The aim of this study was to develop a bioconversion model based on thermogravimetry. Eleven substrates with a specific biogas yield within the range 104 to 572 mLN per gram of volatile solids were subjected to thermogravimetry and a multi linear regression model was developed to predict biogas and methane yields. The optimum parameters describe biogas and methane yields with a root mean square error of 58.8 and 34.3 mLN per gram of volatile solids respectively. The coefficient of determination for these two datasets was 0.81 and 0.84. A prediction technique based on thermogravimetric analysis appears to be a good alternative to other prediction models.
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