The amount of alcohol produced by the anaerobic digestion of
food waste was low (1.5%) compared to previous reports on similar
substrates such as (Watanabe et al. (2009) but could probably
be improved by selecting a better strain of yeast (brewer’s yeast
instead of a baker’s yeast strain) and taking advantage of the extensive
molecular biological knowledge of yeast. A two stage digestion
process taking advantage of the ability of yeast to substantially
breakdown food waste before final breakdown by methanogens
appears feasible and might be a more energy efficient method than
thermochemical digestion used by (Sawayama et al. (1997) to prepare
garbage for digestion by methanogens.