圖書典藏及影音數位平台

都市污水廠放流水再生利用係以電能換取水資源，近年來因溫室效應及全球對二氧化碳排放的關注，先進國家日漸重視污水處理與再生水廠能源的消耗，再生水之開發必須面臨如何節省能耗之課題，尋找新興、潔淨之再生能源已成為各國所致力的目標。 因此本計畫對於國內未來發展再生水廠可應用能源提出整體規劃，包含利用廢熱或太陽能之薄膜蒸餾水再生技術、放流渠道的小水力發電技術、以及低耗能的正滲透技術等技術，以達降低能源使用及友善環境之目標，同時可促進各界對再生能源之重視。

Global climate change which led to water shortage all over the world made feasible reclaimed water resources a hot issue. In Taiwan, reclaimed water is a key factor in the overall management of resources in the future. However, most urban sewage treatment plants consume too much electricity to produce the reclaimed water. How to combine the renewable energy into the energy management system and promote the energy self-sufficiency rate is the goal for these urban sewage treatment plants. This research examined six water reclamation centers or water treatment plants. The cost-effectiveness of renewable energy introduced into these water reclamation centers was evaluated based on the information of environmental characteristics, electricity consumption data, the potential waste heat supplied by nearby industries. This analysis would provide a reference for the future design of renewable energy installed in water reclamation centers in Taiwan. The results of the electricity consumption in the six water reclamation centers: (1) Dihua sewage treatment plant : 0.1475 kWh/m3, (2) Guishan water reclamation center : 0.4073 kWh/m3, (3) Taoyuan north water reclamation center : 3.3756 kWh/m3, (4) Keya water reclamation center : 0.2705kWh/m3, (5) Futien water reclamation center : 0.2197 kWh/m3, and (6) Anping sewage treatment plant : 0.1535 kWh/m3. The feasibility of applying renewable energy in these water reclamation center or sewage treatment plant was analyzed, which included biomass energy, solar energy, wind power, and hydraulic energy. The renewable energy self-sufficiency rate based on the present operations was 57% for the Dihua sewage treatment plant, 14% for the Guishan water reclamation center, 71% for the Taoyuan north water reclamation center, 130% for the Keya water reclamation center, 38% for the Futien water reclamation center, and 38% for the Anping sewage treatment plant. Further considering the scenario: annual served rate of the public sanitary sewage system would increase by 2% from 2021, and the reclaimed water plants would be built in 2021. The renewable energy self-sufficiency rate after 30 years was estimated as follows: 28% for the Dihua sewage treatment plant, 13% for the Guishan water reclamation center, 51% for the Taoyuan north water reclamation center, 42% for the Keya water recycling center, 25% for the Futien water reclamation center, and 15% for the Anping sewage treatment plant. The self-sufficiency rate of the biomass and solar power among these renewable energy were the largest (> 90%), however, the estimated daily solar power generation was extremely unstable. Additionally, taking the potential industrial waste heat into analysis and found the available potential power generation for the regional sewage treatment plant was in the following order: 1.Guishan water reclamation center 2.Anping sewage treatment plant 3.Taoyuan north water reclamation center 4.Futien water reclamation center. Two energy-saving strategies for the water reclamation center in the future were recommended: (1) Optimize the energy and oil consumption (2) Promoting the process operation efficiency. The electricity consumption database of every device should be established, and the energy storage system has to be developed. All kinds of renewable energy and power management should be integrated systematically. A model water reclamation center and a new carbon neutral hydraulic industry are to be expected with energy-saving, energy-creating and self-sufficiency of the circular economy module. The project also visited Singapore and Japan for experiences in the development of water reclaimation business and water-energy integration. Singapore focuses on develop water-reuse modules and the implementation of ICT, while Japan develops localized water reclaimation business to further boost local economy. Combining foreign experiences and characteristics of the the six water reclamation centers, three suggestions for further research are made. First, Taoyuan north and Keya water reclamation center are recommended to be pilot plants for carbon neutral, due to their high potential in renewable energy. Second, Guishan water reclamation center has potential to apply waste heat into the water reclaimation process. Finally, Keya and Anping water reclamation center have potential in combining local aquaculture business.