Excel Solver Aided Biogas Kinetics Computation for Varied Ratio Co-digestion of Cassava Peels with Chicken Manure
DOI:
https://doi.org/10.26740/vubeta.v2i3.38630Keywords:
Chicken manure, Biogas kinetics, Cone model, Cassava peels, Co-digestionAbstract
The co-digestion of cassava peels (CP) and chicken manure (CM) offers a sustainable approach to biogas production, but optimizing process conditions and kinetic modeling remains crucial for efficiency. This study employed Excel Solver to estimate kinetic parameters in the modified Gompertz and Cone models for three different CP:CM ratios (1:1, 1:3, and 3:1) under mesophilic conditions (ambient temperature) and a retention time of 40 days. Anaerobic digestion (AD) was conducted in 4 L batch digesters with a 2 L working volume. Results showed that the 1:3 CP:CM ratio produced the highest cumulative biogas yield (0.25 m³) from experiment, outperforming the other ratios (1:1 = 0.2384 m3 & 3:1 = 0.1576 m3). At the optimal ratio, the modified-Gompertz model exhibited a superior fit (R² = 0.9684) compared to the Cone model (R² = 0.7586), with lower SSE values (2.157 vs. 16.503, respectively), confirming its reliability in capturing microbial adaptation and substrate degradation dynamics. The estimated parameters—biogas production potential (BP = 0.2076 m³), maximum production rate (k = 0.0226 m³/day), and lag phase (λ = 3.4 days)—highlighted the significance of nitrogen balance in optimizing biogas yield. The kinetic study is essential for predicting biogas production trends, optimizing digester performance, and designing efficient biogas systems, while Excel Solver provided is a user-friendly tool for nonlinear regression, eliminating the need for specialized statistical software. This study reinforces the potential of kinetic modeling and computational optimization in enhancing AD processes, paving the way for improved waste-to-energy conversion.
Author Biographies
Yusufu Luka, Department of Chemical Engineering, Faculty of Engineering, Modibbo Adama University
Yusufu Luka is a distinguished Nigerian chemical engineer and academic, currently serving as a faculty member in the Department of Chemical Engineering at Modibbo Adama University (MAU), Yola, Adamawa State, Nigeria. Dr. Luka earned his PhD in Chemical Engineering from the University of Maiduguri, Nigeria, completing his studies between October 17, 2016, and April 27, 2021. His research interests encompass environmental engineering, biotechnology, and process engineering. He has contributed to various studies, including the production of NPK biofertilizers from agricultural waste and the analysis of microbial growth models in chicken manure digesters. Dr. Luka's scholarly work is recognized in academic circles, as evidenced by his profile on the AD Scientific Index. Through his dedication to research and education, Dr. Luka continues to make significant contributions to the field of chemical engineering in Nigeria and beyond
Hassan Ahmed Saddiq, Department of Chemical Engineering, Faculty of Engineering, Modibbo Adama University, Nigeria
Hassan Ahmed Saddiq is a Nigerian chemical engineer and academic, currently serving as a Lecturer in the Department of Chemical Engineering at Modibbo Adama University, Yola, Nigeria. His research interests include chemical reactions, chemical looping technology, catalysis, and energy utilization. According to the AD Scientific Index, his research has been referenced in multiple scholarly works. Through his research and teaching, Dr. Saddiq continues to contribute to advancements in chemical engineering, particularly in areas related to energy y and catalysis.
Abdulhalim Musa ABUBAKAR, Department of Chemical Engineering, Faculty of Engineering, Modibbo Adama University, Nigeria
Abdulhalim Musa Abubakar is a Nigerian chemical engineer and academic, currently serving as a faculty member in the Department of Chemical Engineering at Modibbo Adama University (MAU), Yola, Adamawa State, Nigeria. His research interests encompass renewable energy, process engineering, petroleum engineering, and water treatment processes. Engr. Abdulhalim has made significant contributions to these fields, with a particular focus on biogas production, hydrogen recovery, and biodiesel production. Abubakar's scholarly work is well-recognized, with 264 citations to his publications, reflecting the impact of his research within the academic community. He currently holds an h-index of 9 and an i10-index of 8, indicating both the productivity and influence of his work. In addition to his research, Abdulhalim has contributed to the academic community through publications such as "An Elaborate Breakdown of the Essentials of Biogas Production," which provides comprehensive insights into biogas production processes. His dedication to research and education allo him to continue to advance the field of chemical engineering, particularly in areas related to sustainable energy and environmental processes.
Nathan Akucha Naandeti, Department of Chemical Engineering, Faculty of Engineering, Modibbo Adama University, Nigeria
Nathan Akucha Naandeti, also known as Akuchahyelsu Nathan Naandeti is a Bachelors of Engineering Graduate of Chemical Engineering from Modibbo Adama University, Nigeria. The current work was drafted from his Undergraduate Project Work submitted to the department.
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Copyright (c) 2025 Yusufu Luka, Hassan Ahmed Saddiq, Abdulhalim Musa ABUBAKAR, Nathan Akucha Naandeti
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