薄膜技術可有效去除Giardia及Cryptosporidium等致病胞囊(cysts)，且對於細菌(bacteria)的去除率更是低於偵測極限(detectable level)以下。相較於傳統處理程序，薄膜系統佔地較小、操作效能較佳且技術日益更新。緣此，於世界各國之淨水工程應用上皆廣受注目。本文研究方向主要為結合活性碳吸附與超過濾程序，應用於淨水廠之高級處理，比較超過濾(UF)薄膜單元、活性碳吸附單元及結合活性碳吸附與超過濾程序對水中天然有機物之控制能力，以及薄膜阻力對UF單元操作效能之影響，以提供將來UF程序實廠化之評估資料。
實驗結果顯示，水廠傳統程序對原水濁度去除率介於84~98%，而經後續本模廠高級處理其去除效果良好且水質穩定，去除率幾乎皆達99﹪以上，且UF濾液之水質控制於0.1 NTU左右；然而，UF單元對鹼度、導電度及總溶解固體物等水質指標，去除效果有限，與淨水廠採用之傳統混凝-沈澱-過濾程序相較，去除結果相若。
PAC/UF高級處理程序對TOC及UV254等有機物替代指標之去除控制能力最佳，對原水TOC及UV254之去除率分別為63%及50%，結果皆優於單一UF程序及傳統淨水程序。本試驗中相同PAC劑量對TOC的去除效率較UV254明顯，顯示PAC預吸附作用主要為降低清水中之TOC，實驗中粉狀活性碳劑量以20 mg PAC/L處理為佳。
粒徑分析結果顯示，瑪凌坑溪水體有機物種類繁多，且以粒徑尺寸介於0.7μm左右之分子物種比例居多，佔原水濃度93%，然而傳統處理對水體中分子物種之去除有限，對粒徑尺寸大於0.2μm之物種去除率僅為40%。後續高級處理單元則有較完全的去除能力，且以PAC-UF之去除成效最佳，可完全移除。

Both the PAC/UF and single UF process were operated simultaneously. This study which focus on the removal efficiency of natural organic matters (NOMS) and detection membrane resistance during pilot plant treatment via PAC process sequenced by Ultrafiltration process as well as provide an evaluation of the applicability of this PAC/UF process in a full-scale plant.
In the pilot plant study conducted on finished water in Liu-Du water treatment plant, very low turbidity levels were obtained with polyurethane hollow-fiber membrane. The turbidity of the permeate reached levels as low as 0.1NTU. A 99 percent reduction in turbidity was achieved in advanced water treatment process in this study. Nevertheless, UF membrane were slight useful in reducing Alkalinity, Conductivity and TDS in the same water tested.
During this pilot plant study, PAC/UF process has demonstrated a higher efficiency in the reduction of TOC and UV254 as compared to other process such as conventional water treatment and single UF process. The result indicated that PAC/UF process could reduce 63% TOC of raw water and 50% reduction in UV254 was achieved. Meanwhile, the PAC/UF process did enhance species concentrations removal efficiency when PAC dosing was 20mg/L.
On the other hand, this pilot plant practice has shown PAC/UF process is quite capable of eliminating bacterial and viral concentrations in the permeate.

摘要 iv
目次 vi
圖目錄 ix
表目錄 xi
照片目錄 xiii
第一章 前言 1
1.1 研究緣起 1
1.2 研究目的 2
第二章 文獻回顧 3
2.1 水體中天然有機物 4
2.2 活性碳應用於淨水工程之探討 6
2.2.1 吸附現象 6
2.2.2 活性碳之性質 7
2.2.3 影響活性碳吸附之因子 7
2.2.3.1 吸附劑特性 7
2.2.3.2 吸附質特性 8
2.3 薄膜程序應用於淨水工程之探討 9
2.3.1 薄膜技術發展現況 9
2.3.1.1 粉狀活性碳(PAC)結合超過濾(UF)薄膜應用於淨水工程 9
2.3.1.2 MBR結合PAC/UF程序應用於淨水工程 9
2.3.1.3 超過濾作為NF/RO之預處理應用於淨水工程 10
2.3.2 薄膜種類與分離機制 10
2.3.3 薄膜模組 11
2.3.4 薄膜積垢評估 16
2.3.5 薄膜結合活性碳程序對水體中有機物之去除影響 17
2.3.6 UF薄膜程序對水體中無機物之去除影響 18
2.3.7 消毒殺菌 19
2.4 薄膜的質量傳輸 21
2.4.1 薄膜的滲透模式 21
2.4.2 質量傳輸程序 23
2.4.2.1 溶解性物種之傳輸 23
2.4.2.2 粒子物種之傳輸 25
2.4.2.3 濃度極化層中之擴散傳輸作用 26
2.5 薄膜的濾液流通量 27
2.5.1 濾液流通量之衰減 27
2.5.2 濾液流通量衰減成因及薄膜阻塞控制之方法 27
2.5.2.1 薄餅形成 28
2.5.2.2 吸附性阻塞 29
第三章 實驗系統設計與方法 30
3.1 研究方法與流程 32
3.2 實驗設計 34
3.2.1 單一UF薄膜程序設計 34
3.2.2 粉狀活性碳(PAC)搭配UF單元設計 34
3.3 系統設備與藥品 36
3.3.1 UF薄膜設備與操作 36
3.3.2 PAC吸附設備與操作 37
3.3.3 反沖洗設備與操作 39
3.4 水質檢驗方法 40
3.5 品保品管計畫 49
第四章 結果與討論 52
4.1 傳統處理程序與UF單元對影響適飲性物質之去除比較 53
4.1.1 真色度 53
4.1.2 濁度 56
4.1.3 鹼度、導電度及總溶解固體物 59
4.2 UF與PAC單元對有機物之去除比較 62
4.2.1 UF程序之模廠操作 62
4.2.2 UF結合粉狀活性碳(PAC)之模廠操作 72
4.3 薄膜阻塞探討 75
4.3.1薄膜阻塞之種類 75
4.3.1.1 膠體性阻塞 75
4.3.1.2 生物性阻塞 75
4.3.1.3 化學性阻塞 75
4.3.2 薄膜阻力 76
4.4 薄膜積垢評估指標 82
4.4.1薄膜質量傳送係數 82
4.4.2水中粒子計數及粒徑分析 89
第五章 結論與建議 94
5.1 結論 94
5.2 建議 95
參考文獻 96
符號彙編 102

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