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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/10789完整後設資料紀錄
| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 童心欣 | |
| dc.contributor.author | Bor-Jyh Chen | en |
| dc.contributor.author | 陳柏志 | zh_TW |
| dc.date.accessioned | 2021-05-20T21:58:57Z | - |
| dc.date.available | 2012-07-30 | |
| dc.date.available | 2021-05-20T21:58:57Z | - |
| dc.date.copyright | 2010-07-30 | |
| dc.date.issued | 2010 | |
| dc.date.submitted | 2010-07-19 | |
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/10789 | - |
| dc.description.abstract | 自由餘氯具有良好的氧化力與殺菌能力，被廣泛應用在淨水處理廠中前氧化與消毒處理。而自由餘氯與水中的天然有機物(Natural Oraganic Matter, NOM)反應時會產生消毒副產物(Disinfection by products, DBPs)，其中以三鹵甲烷(Trihalomethane, THM)濃度最高，鹵乙酸(Haloacetic acid, HAA)次之。消毒副產物對人體健康具有危害性，需控制消毒副產物在飲用水中的濃度以維護飲用水安全。淨水處理廠中濾床的生物降解作用有助於控制鹵乙酸及消毒副產物前趨物質，而水中所含有的餘氯量可能會抑制濾床的生物活性。因此，了解前加氯劑量對濾床生物活性、消毒副產物及天然有機物降解的影響，有助於改善消毒副產物所產生的問題。
本研究於小型自來水淨水模廠中進行，設有兩組由不同濾料所組成之快濾床，分別為顆粒狀活性碳(GAC)/石英砂、無煙煤/石英砂，另設陶瓷珠濾床連接於無煙煤/石英砂快濾床之後，討論不同前加氯劑量對於濾床的影響。由三磷酸腺苷(ATP)之單位體積濃度代表生物活性，以鹵乙酸的變化做為生物降解能力的指標，並由非揮發溶解性有機碳(NPDOC)、比紫外光吸收度(SUVA)，分析濾床對於有機物質的利用。 結果顯示前加氯劑量會影響濾床之生物活性以及HAA的生成。當前加氯劑量由8 mg-Cl2/L降至4 mg-Cl2/L、2 mg-Cl2/L時，GAC與無煙煤的ATP濃度提升了15倍與10倍。而生物活性之提高可提升NPDOC與消毒副產物生成潛勢(DBPFP)於快濾床中的去除效率約15%，也可使快濾床對於二氯乙酸之降解效率提升10%。而本研究之陶瓷珠濾床僅對於前加氯所生成之二氯乙酸、三氯乙酸之降解性有所提升。因此，降低前加氯劑量可提升快濾床中的生物活性並提升消毒副產物與其前趨物質之生物降解程度，對於水處理系統中消毒副產物之控制有所幫助。 | zh_TW |
| dc.description.provenance | Made available in DSpace on 2021-05-20T21:58:57Z (GMT). No. of bitstreams: 1 ntu-99-R97541132-1.pdf: 3475853 bytes, checksum: b5c45f8dfe2cbbcf084e0feeaed04515 (MD5) Previous issue date: 2010 | en |
| dc.description.tableofcontents | 口試委員會審定書 I
誌謝 II 摘要 III Abstract IV 圖目錄 VII 表目錄 VIII 附錄 IX 第一章 前言 1 1.1研究背景 1 1.2研究目的 2 第二章 文獻回顧 3 2.1前氧化應用於自來水處理 3 2.2消毒副產物生成及種類 3 2.3三鹵甲烷與鹵乙酸基本介紹 5 2.4消毒副產物生成影響因子 6 2.4.1天然有機質 6 2.4.2 pH值 7 2.4.3溫度 7 2.4.4劑量與反應時間 8 2.4.5溴離子 8 2.5消毒副產物之控制 9 2.6天然有機質與消毒副產物之生物降解 9 2.6.1天然有機質之生物降解 9 2.6.2 微生物降解消毒副產物 10 2.7生物濾床 11 2.7.1生物濾床與天然有機質 11 2.7.2 生物濾床與消毒副產物 12 第三章 實驗材料與方法 14 3.1模廠架構與維護 15 3.1.1模廠配置 15 3.1.2單元設計 17 3.1.3操作與維護 18 3.1.3.1沉澱槽排泥 18 3.1.3.2濾床反沖洗: 18 3.1.4採樣 19 3.2水質與濾料分析 19 3.2.1溫度、pH 20 3.2.2濁度 20 3.2.3總餘氯與自由餘氯 20 3.2.4非揮發性溶解有機碳 20 3.2.5 UV254吸光度 21 3.2.6鹵乙酸萃取及衍生 21 3.2.7三鹵甲烷萃取 23 3.2.8消毒副產物生成潛勢分析 24 3.2.9三磷酸腺苷濃度檢測 25 第四章 結果與討論 28 4.1環境背景與模廠功能 29 4.2 需氯量及自由餘氯之變化 30 4.3生物活性 34 4.4天然有機質降解性 38 4.5消毒副產物降解性 43 第五章 結論與建議 51 5.1 結論 51 5.2 建議 51 參考文獻 53 附錄 56 | |
| dc.language.iso | zh-TW | |
| dc.title | 前加氯劑量對快濾床中生物活性的影響 | zh_TW |
| dc.title | THE IMPACTS OF PRECHLORINATION DOSAGE TO MICROBIAL ACTIVITIES IN RAPID SAND FILTRATION | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 98-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 王根樹,吳先琪 | |
| dc.subject.keyword | 前加氯劑量,生物降解,生物活性,濾床, | zh_TW |
| dc.subject.keyword | Prechlorination dosage,Bioactivity,Biodegradation,Filtration, | en |
| dc.relation.page | 67 | |
| dc.rights.note | 同意授權(全球公開) | |
| dc.date.accepted | 2010-07-20 | |
| 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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