Abstract：Based on the mass balance method introduced by IPCC, this article analyzed reduction potential of carbon reduction on landfilling, aerobic composting, anaerobic digestion and “pressure extrusion pretreatment and dry fraction burning and wet fraction anaerobic digestion”. The study found that “pressure extrusion pretreatment and dry fraction burning and wet fraction anaerobic digestion” has the great potential of carbon reduction, which is 947.6kg CO2/t, compared to the landfilling. Taking Shenzhen City for example, if processing of food waste adopt the mode of “pressure extrusion pretreatment and dry fraction burning and wet fraction anaerobic digestion” in 2011, it would generate electricity for 450million degrees and reduce carbon emissions by 2.014million tons throughout the year.
