With the biogas potential per animal-day determined, it is a simple matter of tabulating the biogas potential and energy
potential on a per farm basis for the various farm sizes based on the average number of animals per farm. The average number of animals per farm size was determined from the Statistics Canada data [21] by dividing the total number of animals per farm size by the number of farms of that size. The methane content of biogas can vary due to numerous factors such as the diet of the animal [27]. For this study it is assumed that biogas is 60% methane, with an energy content of 23.4 MJ/Nm3. The results are presented in Table 2 for Ontario. The values are similar but slightly higher for Canada due to the slightly
larger average number of animals per farm for Canada as a whole.