The Potential of Recycling Used Engine Oil for Biogas Generation by Co-Digestion with Animals’ Manure: Experimental and Kinetic Study. jcoeng [Internet]. 2023 Jul. 1 [cited 2024 May 19];29(07):34-47. Available from: https://joe.uobaghdad.edu.iq/index.php/main/article/view/1742