This project has completed the survey on the amounts of generation for domestic kitchen waste to be recycled, agriculture waste from fruit and vegetable markets, pig feces, and sludge from sewage treatment plants throughout the country. Besides conducting analysis for the potential of anaerobic co-digestion of the abovementioned biomass, experiments were conducted by this project to assess the biological methane potential (BMP) of the biomass, and evaluate the amounts of biogas generation under different compositions of various organic wastes. This project also analyzed the composition of the digestate generated through the kitchen waste anaerobic digestion process, and compared the results with the domestic and overseas requirements on utilization of digestate as fertilizers for land applications, in terms of limitations on heavy metal contents for fertilizers and seed germination rates, in order to determine the feasibility of utilizing digestate from anaerobic digestion. For the four major types of co-digestion processes for various organic wastes and planning for their respective equipment needs, this project has also completed the analyses on the optimal mixing ratios of waste for greatest biogas generation, their potential impact factors and relevant economical and environmental benefits. In addition, this project conducted 20 site visits to existing composting facilities and offered recommendations on efficiency improvement, provided concrete efficiency improvement recommendations, and assessed the funding required in order for the composting facilities to conduct performance and infrastructure improvement projects. Moreover, a review meeting on the current status of domestic kitchen waste recycling operations was held to seek further process improvement. In line with Taiwan EPA’s policy guidance, this project has developed the proposal on Six-Year Plan for Development of Green Energy through Circular Economy - Generation and Utilization of Biomass Energy. In this proposal, comprehensive kitchen waste treatment and disposal options, including enhanced collection and recycling of kitchen waste, as well as diversified means for utilization of kitchen waste, and establishment of biomass energy plants using anaerobic digestion of kitchen waste were proposed.

kitchen waste、anaerobic digestion、biomass energy