Evaluation of Reduction Efficiency and Energy Recovery through Methane Fermentation of Food Wastes

Abstract

 Methane Fermentation of food wastes generated from food wholesale section and retail trade section was conducted in this study. The characteristics of treatment performance, energy recovery and greenhouse gases emission through methane fermentation process were investigated. The results showed that stable operation were achiveved in both two phase with recirculation and single stage methane fermentation, with the COD and degradation rate of 81.7%〜86.3%, 72.6%〜79.1%, respectively. Amount of energy such as electricity and heat recovered from methane fermentation was likely to be used. In addition, the usableness of perfoming methane fermentation of food wastes also lies in the aspect that along with the reduction of auxiliary fuel and food waste capacity, it is also possible to reduce greenhouse gases emission by about 78%.