Issues in Biological Sciences and Pharmaceutical Research

Original Research Article

Ni(II) and Co(II) effects on the anaerobic digestion of livestock manure and bi-logistic function model-prediction of biogas production

Christian C. Opurum*1, Victor M. Onwukwe1, Christian O.Nweke1, and Ikenna N. Nwachukwu1.


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

*Corresponding Author Email: christian.opurum(at)futo.edu.ng; chrisopurum(at)gmail.com

Tel. +234-8037406002

Christian C. Opurum

Victor M. Onwukwe

Christian O.Nweke

Ikenna N. Nwachukwu


Article Number: ibspr.21.004  |   Pages: 27-37  |   Vol. 9 (2), March 2021   |   DOI: https://doi.org/10.15739/ibspr.21.004

 Received: December 9, 2020  Accepted: February 27, 2021  Published: March 14, 2021

Abstract

This study evaluated the effects of Ni(II) and Co(II) on the anaerobic digestion of livestock manure, and bi-logistic function model-prediction of biogas production. The characteristics of the cow dung (CD) and poultry manure (PM) were estimated by standard methods. Batch system anaerobic digesters were operated for 50 days under mesophilic conditions, both with and without Co(II) and Ni(II) supplementation at concentration ranges of 0.02-0.1 mM. The CD and PM possess characteristics suitable for biogas production. Co(II) was found to exhibit a stimulatory effect at all the concentrations tested, the highest biogas yield being at 0.5mM (19.91%). Ni(II) was stimulatory at 0.02 and 0.05mM, with 5.60 and 13.51% increase in gas production respectively, whereas 0.1mM inhibited biogas yield. The result indicates that Co(II) is more effective in improving biogas yield than Ni(II). The Kinetic study also revealed that the bi-logistic function equation suitably fitted the experimental data, with a correlation coefficient > 0.999, indicative of a proper description of AD and biogas production process. The stimulatory effect of Ni(II) and Co(II) and some other trace elements is an advantage that could be exploited in the improvement of anaerobic digestion and biogas production from agro-wastes.

Keywords:

Animal manure, biogas yield, kinetic study, stimulatory effect, trace elements.

How to Cite this Article

Opurum CC, Onwukwe VM, Nweke CO, Nwachukwu IN(2021). Ni(II) and Co(II) effects on the anaerobic digestion of livestock manure and bi-logistic function model-prediction of biogas production.Issues Biol. Sci. Pharma. Res. 9(2):27-37.

Author(s) retain the copyright of this article. Author(s) agree that this article remain permanently open access under the terms of the Creative Commons Attribution License 4.0 International License.


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