Kitchen waste is the certain man-made trash in our daily life. It is mainly the water and oil, which is easy to decompose. In Taiwan, there is about 20,000 metric tons of family rubbish everyday, and approximately 20% to 30% of the rubbish is organic substance. Moreover, kitchen waste has a significant contribution on the total amount of rubbish. Thus, reduction and recycling of kitchen waste becomes an important issue, and it needs to be solved immediately. According to the article of Water Pollutant Prevention Act revised by Environmental Protection Bureau on 26 April 2000, wastewater discharges from apartment buildings need to be treated to meet the discharge standards. Furthermore, the discharge standards will be even more stringent in the near future. Kitchen wastewater includes liquids of kitchen rubbish, liquid of waste oil, and wastewater from grinding machines for food waste crushing. If all of the above polluting wastewater is discharged directly to the sewer system, the cost for sewer system maintenance would be huge. To protect the ecosystem and to minimize the cost of sewer system maintenance, kitchen waste and its wastewater need to be effectively treated. In this study, a kitchen waste treatment system is designed and constructed. This system is able to treat kitchen wastewater efficiently and effectively. Moreover, this system is easy to operate and maintain with less maintenance cost. The treated wastewater could meet the discharge standards with 91.4% of suspended solid removal, 91% of chemical oxygen demand (COD) removal, 96.7% of biochemical oxygen demand (BOD) removal, and 100% of grease removal.

Food waste is one of an organic waste and contains the value of recycling and reusing. EPA shows that there are almost the amount of 4500 tons food wastes which is about 36~64% in households in Taiwan everyday. Therefore, if food wastes could be reused again, not only greatly reducing the amount of waste, decreasing the problem of odor from progressing food wastes, but also increasing the using year of landfills and incinerators. Furthermore, it can develop fully the value of multiple reusing in recycling. The study is forced on questionnaires for the residents of the city of Kaohsiung and Taichung, to know the present of recycling of food waste and its difficulty in executing a strategy. Conferring the willingness to pay and the willingness to accept of food waste recovery and if the price is different or not by Contingent Valuation Method (CVM), and moreover evaluating the potential benefit. The results of the study are as following: there are conspicuous difference in ¡§if doing something about recovery¡¨ ¡§the way of recovery¡¨ and ¡§if see any inspectors examine the classification of refuse¡¨. The most difficulties of recovery food waste in both cities are ¡§its odor and breed mosquito and fly easily¡¨ and ¡§not knowing clearly what materials should be recovered or not¡¨. About the price of the willingness to pay and the willingness to accept, the major answer shows ¡§No, I would not.¡¨ from this questionnaires. On the other hand, answers of ¡§Yes, I would like.¡¨ all hope that the pay less is better and the compensation more is better. The price of the willingness to pay of Kaohsiung residents is NT$ 41.8 dollars, and Taichung residents is NT$ 45.3 dollars. Otherwise, the higher environmental conscious the Kaohsiung residents have, the higher willing to pay. At the same time, the difficulty of recovery food waste is low comparatively. In addition, ¡§occupation¡¨ ¡§family revenue per month¡¨ ¡§cooking per week¡¨ have effect on the price of the willingness to pay and the willingness to accept. In the result of regression, some of variable parameters could affect the price of the willingness to pay. It maybe provides society for reference according the benefit in the estimating of regression. Therefore, the study hopes to provide the decision-maker more clear environmental and economical information through evaluate and analyze the willingness of pay of food waste. Furthermore, it maybe help the government to make a future policy in order to practice the food waste recovery indeed and carry out the target of reducing the amount of waste and resources recovering for a sustainable resources of food waste.