博碩士論文 973206020 詳細資訊




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姓名 賴虹任(Hung-jen Lai)  查詢紙本館藏   畢業系所 環境工程研究所
論文名稱 以膠羽影像光訊號分析(FICA)技術監測高嶺土之化學混凝
(Monitoring the coagulation of kaolin with Floc Image Color Analysis (FICA) technology)
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摘要(中) 混凝是水處理中固液分離的重要程序之一,而在混凝過程中存在著許多因子影響混凝的好壞,其中混凝劑的加藥量是最難控制的一個,目前是由瓶杯實驗及操作經驗來決定加藥量,常有過量加藥的問題,造成藥劑量及後續污泥處理成本的提高。本研究團隊已發展化學混凝之非接觸式監測系統,以期能夠快速得知混凝加藥之成效,唯系統對不同處理條件之適用性並未詳盡調查,也缺乏實廠原水之驗證。
本研究以高嶺土水樣為模擬原水,調整溶液在不同濁度、不同酸鹼值及不同混凝劑劑量下,探討快混階段之RGB變化與RGB值之標準偏差值與顆粒之關聯性。在小型模場中監測不同操作情況,其光訊號變化之情形,並且搭配粒徑分析儀來觀察膠羽顆粒長成的效果,以建立此系統更加完善的可行性。
在混凝過程中膠羽顆粒的變化確實反應在RGB值上,快混過程中之RGB值下降趨勢愈明顯時,混凝效果愈好,慢混過程中RGB跳動幅度愈大,其膠羽顆粒亦較大。透過斜率值之計算可以得到RGB值之變化大小,以分辨混凝效果好壞,藉由斜率-加藥量關係圖可以判定混凝有效藥劑範圍,避免藥劑之浪費。另外,由實驗得知從RGB值之標準偏差值可看出顆粒是否有大小落差,以作為顆粒是否有長成之判斷依據。
摘要(英) Coagulation is an important solid-liquid separation process in potable water/wastewater treatment. Among all the control factors for coagulation, the dosage of coagulant is the most difficult to control. The dosage of coagulant is usually determined by jar test or the experience of operators, which usually leads to an overdose of coagulant. Overdose of coagulant causes high cost for chemicals and for on sludge treatment. So far, in our laboratory, a monitoring system for coagulation process, floc image colorimetric analysis (FICA), to resolve the problems mentioned above has been developed; however, the responses of the monitoring system for various coagulation conditions are not clear and the applications of the system in the control of coagulant dosage have not been clarified yet.
In this research, modeled turbid water is made by kaolin particles. The responses of the FICA to various coagulation conditions, such as initial turbidity, solution pH, and coagulant dosage were investigated. The evolution of RGB values of the suspension images were analyzed.
During coagulation, the solution images varied as the particles grew; as the consequence, the RGB values of the images changed correspondingly.. When the coagulation was effective, the RGB values decreased significantly within rapid-mixing. Then, as the flocs became bigger, the RGB values jumped up as the flocs passing through the observation window and dropped down due to the clear solution during the slow-mixing process. It was found that the slope of the RGB values during rapid-mixing could be used to monitor the coagulation efficiency. As the coagulation efficiency increased, the solution becomes clearer and, thus, the RGB dropped significantly and the slope of RGB values increased. .It is also found that the optimal dosage of coagulant occurred when the slopes of RGB values first hit the bottom. In other words, the optimal coagulation condition could be determined right after the rapid-mixing from jar test, which is much faster than the traditional method. In addition, the standard deviation of the RGB values increased with increasing particle size due to brighter images of flocs.
關鍵字(中) ★ 混凝
★ 光學監測
★ 硫酸鋁
★ 高嶺土
關鍵字(英) ★ image analysis
★ kaolin
★ coagulation
★ alum
論文目次 圖目錄 III
表目錄 VI
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 4
2-1混凝與膠凝理論 4
2-1-1膠體粒子 4
2-1-2混凝 6
2-2鋁鹽混凝之影響因子 10
2-2-1 pH值 10
2-2-2混凝劑種類及濃度 11
2-3監測設備 15
2-3-1流導電流偵測技術 16
2-3-2光纖膠羽偵測技術 17
2-3-3膠羽影像色彩分析技術 19
2-4光學原理與色彩特性 21
2-4-1彩色光譜 21
2-4-2 RGB色彩模式 22
2-4-3光散射理論 23
2-4-4光影像訊號之應用 25
第三章 研究方法 28
3-1研究內容 28
3-2實驗藥品 30
3-3實驗設備 31
3-4模場架設 32
3-5實驗方法 34
3-5-1高嶺土水樣配置 34
3-5-2實驗流程 34
3-5-3影像處理系統 36
第四章 結果與討論 39
4-1原水濁度對影像RGB值變化之影響 39
4-1-1濁度與影像RGB值之關係 39
4-1-2高嶺土水樣光散射訊號變化 43
4-2不同初始濁度混凝對影像RGB值之影響 48
4-3 pH值改變之影像RGB值結果 61
4-4不同快混rpm之影像RGB值變化 66
4-5混凝劑劑量改變之影像RGB值結果 70
4-6快混期間RGB下降斜率與加藥量之關係 76
4-7顆粒大小分析 83
4-7-1不同pH值下之SD分析 83
4-7-2加藥量對S.D值之影響 87
4-8原水水樣之影像RGB值變化 92
第五章 結論與建議 98
5-1結論 98
5-2建議 100
參考文獻 101
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指導教授 秦靜如(Ching-Ju Monica Chin) 審核日期 2010-12-22
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