https://ir.cnu.edu.tw/handle/310902800/21542 觀光系 Search the Channel s https://ir.cnu.edu.tw//simple-search https://ir.cnu.edu.tw/handle/310902800/34962 title: 聚矽酸鐵(PSI)混凝劑水處理應用效能評估及藥劑規範建立研究 abstract: 近年來缺水危機持續不斷，全台水廠常遭遇到異常水質問題，如低濁度難處理原水(含高藻原水)、水庫藻類臭味等問題，加上廢水回收，導致有機物濃縮，使淨水處理與供水操作日益困難。聚矽酸鐵(PSI)為環保署公告核可之飲用水水質處理藥劑，應用為高藻類水源水處理混凝劑。依據國內外相關研究，添加PSI混凝劑對於低濁難處理原水、高藻原水或高有機原水淨化有良好成效，惟水公司並無PSI混凝劑使用相關指引，缺乏不同水源適用藥劑種類規範，導致區處無從實際運用。因此，除現行之傳統混凝劑聚氯化鋁(PACl)與氯化鐵(FeCl3)外，須積極評估PSI混凝劑導入淨水場之應用方式與效能。 本計畫工作內容包括：(1) 蒐集國內外PSI種類、處理技術及使用案例之相關資料、(2) PSI主成分特性與不純物之建議標準與分析方法之參考依據，並建立PSI使用建議規格、(3) 建立本公司五座標的淨水場應用PSI於不同類型原水之最適處理策略、(4) 完成本公司五座標的淨水場使用PSI駐廠輔導及教育訓練、(5) 就國內PSI藥劑取得及使用的性價比，綜合提出應用評估及(6) 辦理「聚矽酸鐵(PSI)混凝劑」特性應用說明會，及主成分檢測技術實作教育訓練。除針對PSI混凝劑特性與各類水質水體處理進行研究，更對淨水場內污泥調理、廢水處理進行評估，旨在增加PSI的多元應用，並協助本公司淨水場改善長年來低濁難處理原水及高有機廢水回流引起之淨水處理問題，以保障供水品質。 <br> Tue, 07 Jan 2025 07:00:25 GMT https://ir.cnu.edu.tw/handle/310902800/34738 title: 去除南化淨水場原水中鐵、錳及氨氮最適操作條件之研究 abstract: 南化淨水場(以下簡稱南化場)水源取自南化水庫，其位於臺南市南化區曾文溪支流後堀溪上，其水源除本身集水區外，另由高屏溪支流旗山溪設甲仙堰於豐水期越域引水，以輸水隧道將旗山溪豐水期多餘之水量引入南化水庫運用，提高南化水庫之供水量。 南化水庫原水進入場內調節池進行水量調整及沉澱降低濁度後，於分水井進行前加氯(次氯酸鈉)去除(氧化)氨氮、鐵及錳等物質，接著進入快混池於原水中加入混凝劑(108年第4季前為半場聚氯化鋁，半場氯化鐵，之後改全場添加氯化鐵)，藉由水躍達成快速混合作用。快混後之原水進入膠羽沉澱池，產生膠羽顆粒，藉由膠羽機緩慢攪拌，經膠凝作用使小膠羽逐漸結合較大且重之膠羽，形成膠羽之原水，在足夠滯留時間下藉由重力之沉降作用、分離原水中較大之膠羽顆粒及懸浮固體。沉澱後原水進入快濾池將細小懸浮物質及微生物等藉由濾料之截留、沉澱、吸附及化學反應等作用加以去除，並藉反沖洗機制維持濾料之清潔。快濾後之清水經後加次氯酸鈉消毒進入清水池，主要功能係維持淨水場穩定出水量之調節能力及確保消毒接觸時間及增加消毒效果。近年來南化水庫於4~6月期間，其原水中還原性物質如鐵、錳與氨氮經檢測後常有升高之趨勢(原水中鐵0.2~0.6 mg/L，錳0.1~1.0 mg/L，氨氮0.2~1.2 mg/L)，導致南化場處理水質不佳。為因應此情形，南化場於調節池消能井添加預氯，增加氧化反應接觸時間，雖能符合飲用水水質標準，惟仍無法有效降低清水中鐵、錳與氨氮，致原水水質不佳時，仍偶有用戶抱怨之情形。為維護飲用水安全及符合飲用水水質標準，於特殊時期針對淨水操作做綜合性診斷及最適操作建置，以使淨水場清水水質符合規定，並達到最佳化操作之目的，爰辦理本計畫。 <br> Sat, 11 May 2024 03:35:59 GMT https://ir.cnu.edu.tw/handle/310902800/34691 title: An Analysis of the Optimal Facility Location of Tourism Industry in Plain Region by Utilizing GIS abstract: In this study, we utilize regional public facilities as the factors of evaluation criteria, apply buffering and weighted overlay analysis in GIS as the multi-criteria spatial information analysis tools, and take the Lanyang Plain, Yilan, Taiwan as the test area for the optimal facility location analysis of tourism industry. We take the optimal service/influence distance of each regional public facility from literature review as the radius of neighborhood for buffering and build the buffer objects in GIS. The process of weighted overlay analysis is conducted by using grid method. After a series of grid size testing, we find that while the grid size decreases to 320m x 320m, the distribution of grids with weighted overlay values is close to the distribution of all the buffer objects mentioned above. The distribution of grids with higher weighted overlap values obviously presents the optimal facility location of tourism industry that is apparently consistent with the distribution of the famous tour sites or facilities of tourism industry and the four to five star hotels. Therefore, we conclude that this optimal facility location model of tourism industry should be quite suitable for land use or site selection planning of tourism and relative industries. <br> Mon, 11 Dec 2023 06:05:22 GMT https://ir.cnu.edu.tw/handle/310902800/34510 title: Natural Organic Matter Removal from Raw Surface Water: Benchmarking Performance of Chemical Coagulants through Excitation-Emission Fluorescence Matrix Spectroscopy Analysis abstract: Chemical disinfection of surface waters has been proven effective in minimizing the risk of contamination by water-borne pathogens. However, surface waters contain natural organic matter (NOM) which, upon chemical disinfection, is readily converted into hazardous disinfection-by-products. Hence, NOM removal from these waters is critical. Chemical coagulation is a readily implementable technology to minimize these undesired side-effects by NOM removal. Herein, capabilities of ferric chloride (FeCl3) and polyaluminum chloride (PACl) as pre-treatment for NOM abatement from natural raw surface water have been benchmarked. Excitation-emission fluorescence matrix (EEM) spectroscopy characterization of NOM fractions demonstrated high removal efficiency. A two-level full factorial design was employed to analyze the effects of coagulant dosage and initial pH on the removal of turbidity, humic acid-like substances and fulvic acid-like substances from the raw water. Higher removal of similar to 77% NOM was attained with PACl than with FeCl3 (similar to 72%). Optimization through response surface methodology showed that the initial pH-coagulant dosage interaction was significant in removing NOM and turbidity for both PACl and FeCl3. These results identify the opportunity for coagulation technologies to prevent and minimize disinfection-by-products formation through NOM removal. <br> Sat, 11 Nov 2023 04:00:00 GMT