| Summary: | 碩士 === 國立交通大學 === 環境工程系所 === 97 === Food waste and green waste are the most organic sources in municipal solid wastes, which can be reused as soil amendments or fertilizer for land application. However, incinerating food waste is problematic due to its high moisture and salt contents; if treated by landfilling, the unpleasant odors and copious leachate generated by kitchen waste is another area of concern. Therefore, composting is often presented as a low-technology and low-investment process to convert organic solid wastes to a soil amendment known as compost. In this study the effect of co-composting of green waste and food waste with bulking agent at various climatic conditions controlled watering and seeding. Condition were investigated i.e. Run 1 is 5% initial sewage sludge and no watering；Run 2 is initial 0% sewage sludge and addition of 1% SS every period/no watering；Run 3 is initial 0% sewage sludge and addition of 1% SS every period/watering；Run 4-1 to 4-3 were performing Run 1, Run 2, and Run 3 at the same time and properties, respectively
Each windrow composting reached 55oC within 2 days and maintained above 55oC over 8 days. The end pH of every windrow was about 8. The compost obtained in all the runs as Class B biosolid. Turning of windrow increased the temperature increased in most instance. The germination indices of Runs 4-1 to 4-3 were 171%, 183%, and 154%, respectively. According to the heavy metal and germination tests, the composting end product showed no phytotoxicity to plant growth. The windrow composting with controlled seeding and watering (Run 4-3) showed the best result.
|
|---|
