Passos, V. F., S. Aquino Neto, A. R. de Andrade, and V. Reginatto. “ Energy Generation in a Microbial Fuel Cell Using Anaerobic Sludge from a Wastewater Treatment Plant ”. Scientia Agricola, vol. 73, no. 5, Oct. 2016, pp. 424-8, doi:10.1590/0103-9016-2015-0194.