Kamlenga, Mwigine, David Olukanni, and Theresa Mkandawire. “Prospect of Recovering Bio-Fertilizer by Anaerobic Co- Digesting Cow Manure, Palm Oil Sludge, and Cassava Peels”. COVENANT JOURNAL OF ENGINEERING TECHNOLOGY 8, no. 1 (May 20, 2024). Accessed July 17, 2024. https://journals.covenantuniversity.edu.ng/index.php/cjet/article/view/4173.