“…For example, landfills in the United States of America emit about onethird of all of the CH 4 emitted in that country (U.S. EPA, 2012). Studies on the potential use of renewable energy to generate biogas for electricity generation have been carried out (Abbas, Ali, Adil, Bashir, & Kamran, 2017;Aliyu, Dada, & Adam, 2015;Al-Hamamre et al, 2017;Fazeli, Bakhtvar, Jahanshaloo, Sidik, & Bayat, 2016;Herbert & Krishnan, 2016;Ouda et al, 2016;Mavrotas, Gakis, Skoulaxinou, Katsouros, & Georgopoulou, 2015;Mengistu, Simane, Eshete, & Workneh, 2015;Raheem, Hassan, & Shakoor, 2016;Scarlat, Motola, Dallemand, Monforti-Ferrario, & Mofor, 2015;Shakeel, Takala, & Shakeel, 2016;Toklu, 2017;Tripathi et al, 2016;Tozlu, Özahi, & Abuşoglu, 2016;Uddin et al, 2016;Wesseh, & Lin, 2016;Yasar et al, 2017). Abbas et al (2017) used cost-benefit analysis to determine biogas plant economics determined that a biogas plant of 10 cubic meters (m 3 ) in size will provide the optimum yield of electricity.…”