李篤中臺灣大學:化學工程學研究所邱荏超Chiou, Ren-ChaoRen-ChaoChiou2007-11-262018-06-282007-11-262018-06-282006http://ntur.lib.ntu.edu.tw//handle/246246/52045本論文中,藉由微電極儀器去量測好氧顆粒DO反應數據,並利用適合的質傳方程式去求解擴散係數。因實驗樣品不同,分為兩部分討論。第一部分,量測反應活性較小的兩種好氧顆粒,分別為貯存於4oC冰箱數個月的醋酸及酚好氧顆粒。生物外觀上觀察,可明顯看出醋酸好氧顆粒的粒徑大於酚好氧顆粒。在較高的水流流速通過好氧顆粒,減少表面質傳阻力至忽略。一維無反應質傳方程式,進行估算可發現,直徑對擴散係分為兩區:較大顆粒的醋酸好氧微顆粒,1.28-2.50 mm,具有較大的擴散係數1.24-2.28 x10-9 m2 s-1 ;較小顆粒的酚生顆粒,0.42-0.78 mm,具有較小的擴散係數2.50-7.65 x10-10 m2 s-1。 藉由微電極及雷射共軛焦顯微鏡量測,可發現好氧顆粒內部為層狀結構。穏態酚生顆粒內溶氧濃度數據說明好氧顆粒之表層具有高反應活性。考慮內部平均氧氣濃度做為邊界可求出擴散係數為1.34-1.82x10-9 m2 s-1。同時處慮非穏態及態態的溶氧數據可知,醋酸好氧顆粒表層之擴散係數為0.6-1.3x10-9 m2s-1;而酚好氧顆粒則為2.5-4.6x10-10m2s-1。由實驗結果顯示,反應及擴散圴為好氧顆粒內部氧氣傳輸的限制因素。The dissolved oxygen (DO) concentration in aerobic granules were measured using microelectrodes, based on which the diffusivity of oxygen was thereby estimated. Considering granules of low bioactivity, the acetate-fed granules of size 1.28-2.50 mm exhibited diffusivity of 1.24-2.28 x10-9 m2 s-1; while phenol-fed granules of size 0.42-0.78 mm had diffusivities of 2.50-7.65 x10-10 m2 s-1. Based on confocal laser scanning microscope testing the interior of granules exhibited layered structure. The steady-state DO concentrations of phenol-fed granule were recorded, showing that oxygen had been depleted in the surface reacting layer of granule. The oxygen diffusivity inside this reacting layer was estimated 1.34-1.82x10-9 m2 s-1 by assuming an mean oxygen concentration. Considering both steady-state and transient DO responses, the acetate-fed granule had diffusivity of oxygen of 0.6-1.3x10-9 m2s-1, while the phenol-fed granules had diffusivity of 2.5-4.6x10-10m2s-1. Both reaction and diffusion limits the oxygen transport in aerobic granules.目錄 頁次 中文摘要 ……………………………………………………………………Ⅰ 英文摘要 ……………………………………………………………………Ⅱ 目錄 ……………………………………………………………………Ⅲ 表目錄 ……………………………………………………………………Ⅴ 圖目錄 ……………………………………………………………………Ⅵ 第一章 文獻回顧 1-1 好氧生物顆粒 ……………………………………………1 1-1-1 好氧生物顆粒的機制及形成…………………1 1-1-2 影響好氧生物微之變因………………………4 1-1-3 生物顆粒結構組成……………………………6 1-2 好氧生物顆粒特及應用…………………………………6 1-3 染色法於ECP上的應用……………………………………7 1-4 微電極的應用……………………………………………8 第二章 實驗方法 2-1 實驗樣品…………………………………………………12 2-2 實驗儀器…………………………………………………14 2-3 實驗方法…………………………………………………16 2-3-1 微電極樣品測試………………………………………16 2-3-2 樣品螢光染色…………………………………………17 第三章 結果與討論 3-1 無反應之好氧顆粒及汙泥膠羽氧氣擴散………………19 3-1-1 外界水流流速的選擇…………………………………19 3-1-2 好氧顆粒DO反應………………………………………20 3-1-3 氧氣擴散係數…………………………………………25 3-1-4 好氧顆粒大小與擴散係之關係………………………26 3-2 穏態反應系統之好氧顆粒氧氣擴散……………………42 3-2-1 穏態生物顆粒DO反應…………………………………42 3-2-2 擴散係數與反應常數…………………………………46 3-3 非穏態反應系統之好氧顆粒氧氣擴散…………………46 3-4 非穏態分析比較…………………………………………53 第四章 結論…………………………………………………54 參考文獻………………………………………………………55en-US生物顆粒granule好氧生物顆粒之氧氣擴散係數Diffusivity of oxygen in aerobic granulesthesis