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論文名稱 Title |
應用現地生物復育技術整治受三氯乙烯污染之地下水 Application of in-situ bioremediation technology to remediate trichloroethylene-contaminated groundwater |
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系所名稱 Department |
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畢業學年期 Year, semester |
語文別 Language |
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學位類別 Degree |
頁數 Number of pages |
104 |
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研究生 Author |
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指導教授 Advisor |
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召集委員 Convenor |
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口試委員 Advisory Committee |
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口試日期 Date of Exam |
2009-07-29 |
繳交日期 Date of Submission |
2009-09-02 |
關鍵字 Keywords |
自然衰減模式、重質非水相液體、含氯有機溶劑、三氯乙烯、現地生物復育 trichloroethylene, Chlorinated organic compounds, dense, In-situ bioremediation |
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統計 Statistics |
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中文摘要 |
含氯有機溶劑常被廣泛的應用於不同形式的工業製程中,其主要被應用於乾洗過程及半 導體製程的清洗溶劑,由於其特性為比重較水重且溶解度低,當其洩漏至地下水後,無法完 全溶解並形成重質非水相液體,其中又以三氯乙烯最具代表性。現地生物復育法為處理受三 氯乙烯污染之地下水的整治技術之一,相較於其他整治方式較為簡單、低成本且具良好處理 的成效。以生物復育法整治三氯乙烯,需確保污染場址中有適當的污染物及微生物、電子接 受者及營養鹽之存在。 本研究場址位於高雄市,場址之工業製程別含有電子製品業、半導體工業及精密光學工 業等,場址內地下含水層受到四氯乙烯、三氯乙烯及1.1-二氯乙烯等含氯有機溶劑污染,其 中部份區域三氯乙烯濃度超過管制標準之0.05 mg/L 及1.1-二氯乙烯管制標準之0.07 mg/L。 本研究採用好氧及厭氧生物復育技術做為整治本場址之方式,進行整治之可行性評估。 根據地下水流向順序、污染物分佈等因素,於場址中規劃好氧及厭氧生物復育整治區。好氧 整治區內設置(含既有井C029)四口整治井,由上游至下游依序為BW1-1、C029、BW1-2 及 BW1-3,四口井之平均三氯乙烯初始濃度分別為0.0853 mg/L、0.1340 mg/L、0.0668 mg/L 及 0.0323 mg/L,其中又以C029 濃度為最高。本研究中添加適當之糖蜜及營養鹽做為好氧微生 物降解三氯乙烯之營養基質,並利用空壓機將氧氣打入於好氧區之地下水中,保持最上游之 監測井BW1-1 維持溶氧值在7-8 mg/L-O2 之間。經213 天整治後,濃度皆降至管制標準值以 下,其濃度分別為N.D、0.0038 mg/L、0.0211 mg/L 及0.0161 mg/L;在厭氧整治區內(含既有 井SW-4)四口整治井,由上游至下游依序為BW2-1、SW-4、BW2-2 及BW2-3,四口井之平 均三氯乙烯初始濃度分別為0.0399 mg/L、0.1460 mg/L、0.1030 mg/L 及0.0492 mg/L,厭氧區 中四口整治井有三口超過管制標準,藉由添加糖蜜及營養鹽做為厭氧微生物共代謝三氯乙烯 之營養基質,經193 天整治後,濃度皆降到接近或低於管制標準值,分別為0.0043 mg/L、0.0687 mg/L、0.0365 mg/L 及0.0289 mg/L。 本場址利用好氧及厭氧生物復育整治受三氯乙烯污染之地下水,經由美國環保署之 BIOCHLOR 自然衰減模式模擬、降解副產物分析、污染分布範圍大小及相關水質參數之分 析,顯示本場址復育具有一定之成果,可以作為提供類似場址整治之參考依據。 |
Abstract |
Chlorinated organic compounds are widely used in various industrial processes. Due to their high density and low water solubility, they are mainly utilized as cleaning solvents in dry cleaning operations, as well as semiconductor manufacturers. Many chlorinated organic compounds spilled sites contain residuals, which present in a pure liquid phase (dense non-aqueous phase liquids, DNAPLs). Trichloroethylene (TCE) is the most typical compound as a result. In situ bioremediation has been successfully used for the removal of TCE. This process has several advantages, such as relative simplicity, low cost, and potentially remarkable efficiency in contamination removal than others. By using the in situ bioremediation to remediate TCE contaminated groundwater, it must ensure (1) biodegradability of contaminants, and the presence of a competent biodegrading population of microorganisms, (2) presence of electron acceptors, and (3) environment condition and, nutrient sources. A field study for biodegradation TCE through molasses injection was conducted at the industrial trading estate in Kaohsiung City. The study included electronic products, semiconductor, nicety optical industry and so on. Molasses, nitrate and phosphate were introduced from injection well (BW1-1 and BW2-1) into aerobic and anaerobic groundwater contaminated site. In the aerobic zone, there were four wells being monitored: BW1-1, C029, BW1-2 and BW1-3. After 213 days of biostimulation treatment, TCE concentration detection results showed TCE concentrations in all wells monitored. BW1-1 and C029, there was a sharp decrease from 0.0853 mg/L to below the detection limit and from 0.1340 mg/L to 0.0038 mg/L. BW1-2 and BW1-3 showed a slight decrease from 0.0668 mg/L to 0.0211 mg/L and from 0.0323 mg/L to 0.0161 mg/L. After treatments, TCE concentrations in all wells monitored were dropped to 0.05 mg/L. In anaerobic zone, there were four wells being monitored: BW2-1, SW-4, BW2-2 and BW2-3. After 193 days of biostimulation treatment, TCE concentration detection results showed TCE concentrations in all wells monitored. BW2-1, SW-4, BW2-2 and BW2-3 all had a slight decrease from 0.0399 mg/L to 0.0043 mg/L, from 0.14603 mg/L to 0.0687 mg/L, from 0.1030 mg/L to 0.0365 mg/L and from 0.0492 mg/L to 0.0289 mg/L. According to the results from BIOCHLOR modeling, elevated aqueous concentration of chloroethenes with a classical reduction pathway for TCE leading to an accumulation of vinyl chloride and ethane. All the results revealed that bioremediation technology is one of the more feasible approaches to clean up TCE contaminated groundwater in this field. |
目次 Table of Contents |
謝誌.................................................................................................................................................... II 摘要...................................................................................................................................................III Abstract .............................................................................................................................................IV 目錄.................................................................................................................................................... V 圖目錄............................................................................................................................................. VII 表目錄............................................................................................................................................ VIII 第一章 前言.......................................................................................................................................1 1.1 研究緣起........................................................................................................................1 1.2 研究目的........................................................................................................................3 第二章 文獻回顧...............................................................................................................................4 2.1 地下水含氯有機化合物之污染來源.............................................................................4 2.1.1 含氯有機化合物之特性及危害..........................................................................6 2.1.2 DNAPL 傳輸概念................................................................................................9 2.2 污染整治技術種類.......................................................................................................13 2.2.1 生物復育技術之定義.......................................................................................14 2.2.2 含氯有機化合物之反應...................................................................................15 2.2.3 共代謝機制.......................................................................................................17 2.2.4 好氧生物復育機制...........................................................................................18 2.2.5 厭氧生物復育機制...........................................................................................20 2.3 類似場址回顧...............................................................................................................24 第三章 實驗與方法..........................................................................................................................25 3.1 現地場址背景介紹......................................................................................................25 3.1.1 場址介紹...........................................................................................................25 3.1.2 氣象條件...........................................................................................................26 3.1.3 地質條件...........................................................................................................29 3.1.4 地形條件...........................................................................................................32 3.1.5 地下水位及流向...............................................................................................33 3.1.6 目標污染物分布範圍.......................................................................................37 3.2 實驗架構......................................................................................................................39 3.2.1 實驗架構流程圖...............................................................................................39 3.2.2 前置作業...........................................................................................................40 3.2.3 現場作業及採樣方式........................................................................................47 3.2.4 水質分析分法....................................................................................................49 3.3 BIOCHLOR 模式.........................................................................................................52 3.3.1 BIOCHLOR 模式使用限制...............................................................................52 3.3.2 BIOCHLOR 模式原理......................................................................................53 3.3.3 BIOCHLOR 模式之輸入參數..........................................................................54 第五章結果與討論............................................................................................................................58 4.1 目標污染物濃度趨勢分析..........................................................................................58 4.2 降解副產物趨勢分析..................................................................................................62 4.3 電子接受者與生物復育指標參數變化分析..............................................................65 4.4 BIOCHLOR 模式之模擬結果....................................................................................78 4.5 復育後目標污染物模擬比較......................................................................................81 4.6 整治費用評估...............................................................................................................83 第五章 結論與建議..........................................................................................................................86 5.1 結論..............................................................................................................................86 5.2 建議..............................................................................................................................87 |
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