“…Anaerobic digestion (AD) is a natural process, in which organic matter is converted by microbes into gases which present energetic potential, such as methane (CH 4 ) and hydrogen (H 2 ), under oxygen-free conditions (Baêta et al 2016). AD is currently explored to produce biogas using various lignocellulosic feedstock sources, such as fruit and vegetable waste, grape pomace, rice straw, wheat straw, yard waste, tree trimming and yard trimming (Brown et al 2012, Liew et al 2012, Zhao et al 2014, Sheets et al 2015, Baêta et al 2016, El Achkar et al 2017, Pezzolla et al 2017, Edwiges et al 2018.…”