提升淨水場用水效能策略之先期研究

Abstract

傳統淨水場處理程序中，原水經淨水場各處理單元時，各單元之操作效能除影響出水水質、供水穩定性及能源耗損外，淨水程序中之廢水回收方式亦與水場用水效率息息相關，然而，國內自來水事業單位現階段仍尚未針對淨水場運作建立健全之水質、水量及能源管理指標；因此，如何建立適宜之操作管理指標以有效提升水資源利用效率、加強淨水場用水管理及提供質優量足之自來水，成為淨水場管理之首要目標。
為提升國內水資源管理效率及淨水場供水水量、水質之穩定性，本計畫蒐集了國內淨水場既有之基本資料、管理制度與管理指標，於104年7月17日所舉辦之第一次專家學者會議及104年7月21日所舉辦之淨水場操作管理指標研商會議中，針對淨水場用水、水質處理及能源等操作管理相關之指標進行評估，並訂定水量(全場造水率、產能負荷率及水迴流率)、水質(水質合格率及內控標準達標率)及能耗指標(單位出水用電量年平均變化率及逾年限主要機電設備率)，探討各指標於實務面、管理面執行之適宜性與可行性，並研擬制定評鑑報表等制度及文件；試行階段篩選了國內北、中、南各區日出水量大於十萬CMD，且具原水及出水計量設施之六座目標淨水場(東興、鯉魚潭、板新、大湳、潭頂及坪頂)進行淨水操作管理指標評估之試行，最後並提出「自來水事業淨水場操作管理指標評估實施要點」草案。


High quality and stable water supply depends on the operational performance of conventional water treatment plants (WTPs), which is related to the energy consumption in water supply. The water recycling process also highly affects water use efficiency in WTPs. However, the management indicators on water quantity, water quality as well as energy consumption in WTPs are still not well-established in Taiwan. Therefore, it is necessary to establish the appropriate management indicators to improve water use efficiency in WTPs. 
In order to establish proper management indicators of WTPs, the information and data associated with the management systems or management indicators have been collected for this project. The relevant indicators of water quantity (i.e., water productivity, load of water production and water recycling ratio), water quality (i.e., acceptability of drinking water quality standard and internal standard) and energy consumption (i.e., year variation in the values of electricity consumption per unit of water production and the percentage of overdue electromechanical appliances) have been defined after two consulting meetings with in-depth discussion on those indicators. After that, six waterworks equipped with accurate water flow meters (the capacity of water production is more than 100,000 CMD), including Dong-Shing, Carp-Lake, Ban-Xin, Da-Nan, Tan-Din and Pin-Din, have been chosen as demonstration sites for running a trial program. Finally, the draft of “Operation Directions for Establishment of Management Index in Water Treatment Plants” is expected to appear in the final report.