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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 李慧梅 | |
dc.contributor.author | Chia-Ling Lou | en |
dc.contributor.author | 婁嘉玲 | zh_TW |
dc.date.accessioned | 2021-06-13T16:28:46Z | - |
dc.date.available | 2005-07-22 | |
dc.date.copyright | 2005-07-22 | |
dc.date.issued | 2005 | |
dc.date.submitted | 2005-07-13 | |
dc.identifier.citation | Alan M. Jones, Roy M. Harrison, (2004) The effects of meteorological factors on atmospheric bioaerosol concentrations—a review. Science of the Total Environment, 326, 151–180.
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/38249 | - |
dc.description.abstract | 本研究探討HVAC系統中光觸媒濾材控制生物氣膠之效能與可行性評估。本研究設計一測試箱模擬室內HVAC系統,並利用氣膠產生器將液相中之微生物霧化產生生物氣膠,與稀釋空氣一同注入HVAC模擬系統。實驗之微生物物種包含大腸桿菌(E. coli)、枯草桿菌(B. subtilis)、酵母菌(Yeast)與青黴菌(Pen. citrinum),實驗變因包含UV光波長(365 nm、254 nm)、相對濕度(30%、60%)與濾材種類(Degussa P25、 D-type)等。實驗條件在固定通風換氣率與不同操作條件下,探討下四種生物氣膠之衰減情形,以瞭解紫外光與光觸媒濾材對生物氣膠之殺菌效能。實驗結果顯示,四種不同生物氣膠(E. coli, Yeast, B. subtilis, P. citrinum)於總換氣率1 h-1,乾淨空氣換氣率0.18 h-1之自然衰減常數(kn)分別為2.14、1.31、1.00與1.22 h-1。Degussa P25光觸媒濾材在未照光及照射UV光(365 nm)之生物氣膠衰減常數分別為2.45、1.49、1.38、1.37 h-1(未照光)及2.88、1.60、1.51、1.52 h-1(照射UV光)。結果顯示,當HVAC系統增加光觸媒濾材與照射UV光之後,生物氣膠之衰減常數明顯增加。比較有無光照之結果顯示,其衰減常數差異不大,表示光催化反應對生物氣膠之去除效果並不顯著,主要去除機制來自於濾材本身之機械過濾作用所致。綜合不同實驗變因之影響,相對濕度對生物氣膠衰減常數之影響並不明顯。比較照射光觸媒濾材之紫外光波長之結果顯示,短波長之紫外光對生物氣膠之衰減有明顯增進效果。兩種不同光觸媒濾材之去除效果,其結果差異性不大。單就不同紫外光波長對生物氣膠殺菌效力之探討,365 nm之UV光幾乎沒有任何殺菌效果,而使用254 nm之UV光,對生物氣膠之衰減量則有明顯增加。研究結果顯示,利用254 nm紫外光之光觸媒濾材去除非產孢細菌性生物氣膠之去除效能最為顯著。 | zh_TW |
dc.description.abstract | The study evaluates germicidal effects of titanium dioxide photocatalytic filter and ultraviolet on bioaerosols. The experiment used a testing chamber to simulate an indoor HVAC system and four bioaerosols. The influences of microorganism species, UV length (365 nm, 254 nm), relative humidity (30%, 60%), and filters (uncoating and Degussa P25 TiO2 -coated filter, D-type TiO2 filter) on the germicidal effects with ACH are 1 h-1 and fresh ACH are 0.18 h-1. A Collison nebulizer generated Escherichia coli (E. coli), Bacillus. subtilis (B. subtilis), endospores, yeast cells of Candida famata (C. famata) var. flareri, and spores of Penicillum citrinum (P. citrinum). The viable bioaerosol concentration collected by Anderson one-stage sampler passed through TiO2-coated filters with and without ultraviolet irradiation.
The filtration mechanism, PCO process and germicidal effects was determined as the parameters, decay constant (kn, ka-d, and ka-l), CADR(Qi), and removal efficiencies(η). Besides the parameters, we also investigated the proportion of filtration, ultraviolet irradiation, and PCO process. The experiment results demonstrated that PCO process wasn’t significant in HVAC system. In a word, with the 254 nm ultraviolet and photocatalytic filter, the removal efficiency would be increasing obviously. Raising the relative humidity in the control mechanism didn’t effects apparently. In a comparison of TiO2 filters, the difference of the results were also unobvious. It showed that the removal efficiency of E. coli are the best with the 254 nm ultraviolet and photocatalytic filter in HVAC system. | en |
dc.description.provenance | Made available in DSpace on 2021-06-13T16:28:46Z (GMT). No. of bitstreams: 1 ntu-94-R92541129-1.pdf: 1206796 bytes, checksum: 68b53d8dcfcea08590178c3f02ad5105 (MD5) Previous issue date: 2005 | en |
dc.description.tableofcontents | 目 錄
第一章 緒論 1 1-1 研究緣起 1 1-2研究目的 3 1-3研究方法 3 第二章 文獻回顧 4 2-1 室內通風空調系統HVAC 4 2-2生物氣膠 5 2-2-1生物氣膠之來源及種類 5 2-2-2室內生物氣膠之調查研究 6 2-2-3生物氣膠特性 7 2-2-4 生物氣膠對環境及人體健康之影響 10 2-2-5 生物氣膠量測技術 13 2-2-6 生物氣膠採樣技術 14 2-3 空氣清淨技術 15 2-3-1 紫外光殺菌技術 16 2-3-2 臭氧殺菌技術 16 2-3-3 光觸媒殺菌 17 2-3-4 負離子殺菌技術 18 2-3-5 靜電濾材殺菌技術 19 2-4 光催化反應殺菌機制 20 2-4-1 光觸媒作用原理 20 2-4-2光觸媒空氣清淨技術 22 第三章 實驗設備與方法 24 3-1 實驗系統 24 3-1-1 室內環境HVAC模擬系統 25 3-1-2實驗設備 30 3-1-3生物氣膠培養單元 31 3-1-3-1 實驗物種 31 3-1-2 紫外光與光觸媒濾材控制單元 35 3-1-2-1 光催化反應部分 35 3-1-2-2 光觸媒濾材之製備 36 3-1-2-3 UV光源波長之選擇 36 3-1-4 生物氣膠產生及採樣單元 37 3-1-5 前置實驗 38 3-2 HVAC模擬系統混合率測試 40 3-3 實驗計算方法與指標參數 41 第四章 結果與討論 44 4-1 HVAC模擬系統混合率測試 44 4-2 實驗結果與分析 45 4-2-1 生物氣膠於HVAC系統中之自然衰減常數 46 4-2-2 HVAC系統中UV光與光觸媒濾材對於去除生物氣 膠之影響 49 4-2-2-1 HVAC系統中UV光與光觸媒濾材對生物氣膠 衰減常數之影響 49 4-2-2-2 紫外光與光觸媒濾材之淨處理能力 54 4-2-1-3紫外光與光觸媒濾材於HVAC系統中對生物氣 膠之殺菌效率 56 4-2-3 不同UV光與光觸媒濾材對生物氣膠之影響 58 4-2-3-1 UV光對生物氣膠衰減常數之影響 58 4-2-3-2 UV光對生物氣膠淨處理能力之影響 63 4-2-3-3 UV光波長對生物氣膠之殺菌效率 64 4-2-4 HVAC系統中不同UV光與光觸媒濾材對於去除生物 氣膠之影響 66 4-2-4-1 HVAC系統中不同UV光對生物氣膠衰減常數之影響 66 4-2-4-2 UV光與光觸媒濾材對生物氣膠之淨處理能力 73 4-2-4-3 UV光與光觸媒濾材對生物氣膠之殺菌效率 75 4-2-5 HVAC系統中相對濕度對於去除生物氣膠之影響 78 4-2-5-1 相對濕度對生物氣膠衰減常數之影響 78 4-2-5-2相對濕度對生物氣膠淨處理能力之影響 84 4-2-5-3 相對濕度對生物氣膠之殺菌效率 86 4-2-6 HVAC系統中濾材對於去除生物氣膠之影響 89 4-2-6-1 光觸媒濾材對生物氣膠衰減常數之影響 89 4-2-6-2 未塗佈與塗佈光觸媒之濾材對生物氣膠衰減常 數之影響 95 4-2-6-3光觸媒濾材對生物氣膠淨處理能力之影響 97 4-3-6-4一般濾材與光觸媒濾材對生物氣膠淨處理能力之影響 99 4-2-6-5 光觸媒濾材對生物氣膠之殺菌效率 100 4-2-6-6 一般濾材與光觸媒濾材對生物氣膠之殺菌效率 103 4-3 綜合評估 104 第五章 結論與建議 106 5-1 結論 106 5-2 建議 108 參考文獻 109 表目錄 表2.1生物氣膠粒徑大小 9 表3.1 菌種特性 32 表3.2 實驗參數與實驗條件 35 表4.1 HVAC模擬系統之混合率 45 表4.2 生物氣膠之自然衰減常數 46 表4.3 UV光與光觸媒濾材去除生物氣膠之衰減常數 49 表4.4 光觸媒濾材照射波長365 nmUV光對生物氣膠之淨處理能力 55 表4.5 生物氣膠於HVAC系統中於30 min後之去除效率 56 表4.6 不同UV光波長對生物氣膠衰減常數之影響 58 表4.7 照射不同波長UV光對生物氣膠之淨處理能力 63 表4.8 波長365 nm之UV光照射生物氣膠於30min後之去除效率 65 表4.9 波長254 nm之UV光照射生物氣膠於30min後之去除效率 65 表4.10 不同UV光波長之光催化反應對生物氣膠衰減常數 67 表4.11 光觸媒濾材照射波長365 nmUV光對生物氣膠之淨處理能力 74 表4.12 光觸媒濾材照射波長254 nmUV光對生物氣膠之淨處理能力 74 表4.13 波長365 nm之UV光照射生物氣膠於30 min後之去除效率 76 表4.14 波長254 nm之UV光照射生物氣膠於30 min後之去除效率 76 表4.15不同相對濕度對生物氣膠衰減常數之影響 79 表4.16紫外光與光觸媒濾材於RH為30%對生物氣膠之淨處理能力 84 表4.17紫外光與光觸媒濾材於RH為60%對生物氣膠之淨處理能力 85 表4.18 RH=30%時以UV光照射生物氣膠於30 min後之去除效率 86 表4.19 RH=60%時以UV光照射生物氣膠於30 min後之去除效率 87 表4.20 不同光觸媒濾材對生物氣膠衰減常數之影響 90 表4.21 不帶電不織布濾材對生物氣膠衰減常數之影響 95 表4.22 Degussa P25光觸媒濾材對生物氣膠之淨處理能力 98 表4.23 D-type光觸媒濾材生物氣膠之淨處理能力 98 表4.24 照射不同波長UV光對生物氣膠之淨處理能力 100 表4.25 照射Degussa P25光觸媒對生物氣膠於30 min後之 去除效率 101 表4.26 照射D-type光觸媒對生物氣膠於30 min後之去除效率 101 表4.27有無塗佈光觸媒濾材對生物氣膠於30min後之去除效率 103 表4.28 淨處理能力之綜合評估 105 圖目錄 圖2.1典型 HVAC系統配置圖…………………………………………...4 圖2.2 不同粒徑之氣膠於肺泡區沈積情形 8 圖2.3 生物氣膠粒徑大小分布情形 10 圖2.4 光觸媒氧化還原反應機制 21 圖3.1 HVAC模擬系統圖 26 圖3.2 HVAC模擬系統配置 27 圖3.3 紫外光與光觸媒濾材控制單元細部圖 27 圖3.4 實驗流程圖 28 圖3.5 Degussa P25 TiO2粉末於之吸收光譜 37 圖4.1 大腸桿菌於HVAC系統中之自然衰減率 47 圖4.2 酵母菌於HVAC系統中之自然衰減率 47 圖4.3 枯草桿菌於HVAC系統中之自然衰減率 48 圖4.4 青黴菌於HVAC系統中之自然衰減率 48 圖4.5 大腸桿菌在使用Degussa P25光觸媒濾材之衰減常數………….52 圖4.6 酵母菌在使用Degussa P25光觸媒濾材之衰減常數 52 圖4.7 枯草桿菌在使用Degussa P25光觸媒濾材之衰減常數 53 圖4.8 青黴菌在使用Degussa P25光觸媒濾材之衰減常數 53 圖4.9 UV光為365nm照射光觸媒濾材對生物氣膠之去除效率…….....57 圖4.10 照射UV光波長為254 nm對大腸桿菌衰減常數之影響 60 圖4.11 照射UV光波長為254 nm對酵母菌衰減常數之影響 61 圖4.12 照射UV光波長為254 nm對枯草桿菌衰減常數之影響 62 圖4.13 照射UV光波長為254 nm對青黴菌衰減常數之影響 62 圖4.14 照射365 nm之UV光對生物氣膠之去除效率 65 圖4.15 照射254 nm之UV光對生物氣膠之去除效率 66 圖4.16 UV光照射光觸媒濾材對大腸桿菌衰減常數之影響 69 圖4.17 UV光照射光觸媒濾材對酵母菌衰減常數之影響 70 圖4.18 UV光波長照射光觸媒濾材對枯草桿菌衰減常數之影響 71 圖4.19 UV光波長照射光觸媒濾材對青黴菌衰減常數之影響 72 圖4.20 UV光照射光觸媒濾材對生物氣膠之去除效率…………………77 圖4.21 相對濕度對大腸桿菌衰減常數之影響 80 圖4.22 相對濕度對酵母菌衰減常數之影響 81 圖4.23 相對濕度對枯草桿菌衰減常數之影響 82 圖4.24 相對濕度對青黴菌衰減常數之影響 83 圖4.25 不同相對濕度對生物氣膠之去除效率 88 圖4.26 不同光觸媒濾材對大腸桿菌衰減常數之影響 91 圖4.27 不同光觸媒濾材對酵母菌衰減常數之影響 92 圖4.28 不同光觸媒濾材對枯草桿菌衰減常數之影響 93 圖4.29 不同光觸媒濾材對青黴菌衰減常數之影響 94 圖4.30 未塗佈與塗佈光觸媒濾材對大腸桿菌衰減常數之影響 96 圖4.31 未塗佈與塗佈光觸媒濾材對酵母菌衰減常數之影響 96 圖4.32 不同光觸媒濾材對生物氣膠之去除效率 102 圖4.33 不帶電不織布濾材與光觸媒濾材對生物氣膠 之去除效率 104 | |
dc.language.iso | zh-TW | |
dc.title | 紫外光與光觸媒濾材對生物氣膠殺菌效率之研究 | zh_TW |
dc.title | Germicidal Effects of Titanium Dioxide Photocatalytic Filters and Ultraviolet on Bioaerosols | en |
dc.type | Thesis | |
dc.date.schoolyear | 93-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 李崇德,李芝珊,羅金翔 | |
dc.subject.keyword | 生物氣膠,光觸媒濾材,紫外光,空調通風系統,光催化, | zh_TW |
dc.subject.keyword | bioaerosol,photocatalytic filter,ultraviolet,HVAC,PCO process, | en |
dc.relation.page | 116 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2005-07-13 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 環境工程學研究所 | zh_TW |
顯示於系所單位: | 環境工程學研究所 |
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