Evaluation of biogas yield and kinetics from the anaerobic co-digestion of cow dung and horse dung: a strategy for susta
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ORIGINAL ARTICLE
Evaluation of biogas yield and kinetics from the anaerobic codigestion of cow dung and horse dung: a strategy for sustainable management of livestock manure Meshach Ileanwa Alfa1 • Hilary Ijeoma Owamah2 • Anthony Ogochukwu Onokwai3 Sudalaimuthu Gopikumar4 • Solomon Olakunle Oyebisi5 • Smita Subodh Kumar6 • Somvir Bajar6 • Olusegun David Samuel7 • Samuel Chukwujindu Ilabor8 1 2 3 4 5 6 7 8
Department Department Department Department Department Department Department Department
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Civil Engineering, University of Jos, Jos, Nigeria Civil and Environmental Engineering, Delta State University, Oleh Campus, Abraka, Delta State, Nigeria Mechanical and Biomedical Engineering, Bells University, Ota, Ogun State, Nigeria Civil Engineering, SCAD College of Engineering and Technology, Tirunelveli, India Civil Engineering, Covenant University, Ota, Nigeria Environmental Sciences, J.C. Bose University of Science and Technology, YMCA, Faridabad, Haryana 121006, India Mechanical Engineering, Federal University of Petroleum Resources, Effurun, Delta State P.M.B 1221, Nigeria Chemistry, Federal College of Education (Technical), Asaba, Delta State, Nigeria
Received: 25 June 2020 / Revised: 29 October 2020 / Accepted: 9 November 2020 The Joint Center on Global Change and Earth System Science of the University of Maryland and Beijing Normal University 2020
Abstract In this study, investigation was done to determine the optimum combination of cow dung (CD) and horse dung (HD) for enhanced biogas production and plant stability. Anaerobic co-digestion of CD and HD at varying percentage combination was carried out in five (5) identical 25 L cylindrical digesters (A–E) for a retention period of 37 days, at an average ambient temperature of 33 C. Using the Microsoft excel solver function, 2010 version, & Hilary Ijeoma Owamah [email protected]; [email protected] Meshach Ileanwa Alfa [email protected]; [email protected] Anthony Ogochukwu Onokwai [email protected]; [email protected] Sudalaimuthu Gopikumar [email protected] Solomon Olakunle Oyebisi [email protected]
the modified Gompertz model was applied to predict the relevant kinetic variables of the digestion process. Result obtained shows that digester D with 25% CD and 75% HD produced the highest daily biogas, followed by C (50% CD and 50% HD), B (75% CD–25% HD), A (100% CD) and E (100% HD). Digester D also had maximum biogas production potential (A) of 13.8 L/gVS, maximum biogas production rate (l) of 0.69 L/gVS/day and shortest lag phase (k) of 5.20 days. Digester E with 100% HD, though had a short lag phase of 5.72 days, had the least total biogas yield of 5.1 L/gVS. The closeness of the coefficients of determination (R2) to 1 reflects a good fit, between experimental and simulated data. The study found that increase in the amount of cow dung beyond 25% led to decrease in biogas yield. It has also shown that biogas production from CD and HD is feasible and can serve as wa
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