“…Therefore, a simplified and laboratory scale method known as biochemical methane potential (BMP) was developed by Owen et al (1979) to determine the biodegradability of organic substrates. Since then, there have been numerous studies conducted on the diversity of organic materials to determine its capability in yielding biogas, such as woody biomass (Turick et al, 1991), organic solid wastes (Hansen et al, 2004;Shanmugam and Horan, 2009), grease trap sludge (Luostarinen et al, 2009), and many more. The BMP reports can be divided into three categories, including: (1) the potential of an individual substrate (Chynoweth et al, 1993;Gunaseelan, 2004;Cavaleiro et al, 2013;Li et al, 2011); (2) the optimum ratio of combined or co-digestion substrate (Davidsson et al, 2008;Li et al, 2011;Lisboa and Lansing, 2013); and (3) focusing on specific aspects, such as effects on temperature range (Veeken & Hamelers, 1999;Linke et al, 2013), micro and macro pollutants elements (Angelidaki and Sanders, 2004;Demirel and Scherer, 2011;Wan et al, 2011), substrate to inoculum ratio (Chynoweth et al, 1993;Elbeshbishy et al, 2012;Li et al, 2011), and others.…”