Issues in Biological Sciences and Pharmaceutical Research

Original Research Article

Predicting the rate of biogas production from the anaerobic digestion of blends of cassava (Manihot esculenta) peels with poultry manure

Christian C. Opurum*1, Ikenna N. Nwachukwu1, Christopher E. Nwanyanwu1 and Chioma B. Nwaneri1

1Department of Microbiology, Federal University of Technology, P.M.B.1526 Owerri, Imo State, Nigeria.

*Corresponding Author: Email: christian.opurum(at); chrisopurum(at)


Christian C. Opurum

Ikenna N. Nwachukwu

Christopher E. Nwanyanwu

Chioma B. Nwaneri

Article Number: ibspr.21.005  |   Pages: 38-47  |   Vol. 9 (2), March 2021   |   DOI:

 Received: December 10, 2020  Accepted: February 26, 2021  Published: March 14, 2021


In this study, blends of cassava peels (CP) with poultry manure (PM) were co-fermented to evaluate the performance and predict the rate of biogas production. The physicochemical characteristics of the bioreactor feeds were estimated by standard methods. Four bioreactors (BR) of 12 L capacity labeled BR1 – BR4 were charged with 65 g/L of the feeds in different ratios, giving a final weight of 520 g in 8 L. The fermentation was operated in a batch mode under ambient temperature conditions (25 – 35 °C) for 28 days. The substrates showed good physicochemical characteristics, indicative of their prospects in bioenergy production. The means of cumulative biogas yield (dm3) were BR1 2.93 (0.008 dm3/gVS), BR2 13.65 (0.04 dm3/gVS), BR3 21.44 (0.05 dm3/gVS) and BR4 1.10 (0.003 dm3/gVS). Analysis of variance (ANOVA) indicated a significant difference (P ≤ 0.05) in biogas yield in all the treatments. Modified Gompertz model gave a suitable description of the kinetics of the anaerobic digestion process, predicting biogas production rate (U), biogas production potential (Ym), and the lag period (λ). The experimental and predicted data of biogas production were properly fitted, with correlation coefficients (R2) > 099, which indicates good process performance.


Cassava peels, poultry manure, co-fermentation, biogas yield, kinetics

How to Cite this Article

Opurum CC, Nwachukwu IN, Nwanyanwu CE, Nwaneri CB(2021). Predicting the rate of biogas production from the anaerobic digestion of blends of cassava (Manihot esculenta) peels with poultry manure. Issues Biol. Sci. Pharma. Res. 9(2):38-47.

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