Recently, the way to treat food wastes and general garbage together has been requested to be more reasonable. Also, in order to improve the operation efficiency of municipal waste incinerator, and reduce the burden of sanitary landfill operation, recycling of food wastes from garbage and reusing after proper treatment will be a very important issue of environmental protection. Therefore, this project will develop and design a two-stage fermentation system of food waste treatment for Taiwan metropolis. It is hopeful that the system can provide the best way for food waste treatment, and implement the government’s environmental protection concept of resources recycling as well as reusing. Moreover, this system can be also a reference for converting food wastes to organic fertilizers. The testing result of first stage high-efficiency fermentation machine has shown that 700C operation temperature, 0.2 Nm3/min air flow, 15 min /cycle stirring speed, and 3.3% wooden waste as an additive are the best condition for food waste treatment. In addition, the mixtures of 0%, 20%, and 33% of first stage products with fresh food wastes were composted to become thoroughly decomposed fertilizers for 45 days. The germination test of these organic fertilizers has shown that the percentages increase from 20.1-26.6% to 65.3-74.2% but not over 80% yet. Therefore, more composting time is necessary.

Food Wastes, Two-Stage Fermentation Treatment, Resources Recycling and Reusing