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研究生:黃泰元
研究生(外文):Tai-Yuan Huang
論文名稱:焚化飛灰再利用情境之特性與生命週期評估
論文名稱(外文):Analysis of MSWI Fly Ash Reuse in Property and Life Cycle Assessment
指導教授:闕蓓德闕蓓德引用關係
指導教授(外文):Pei-Te Chiueh
口試委員:馬鴻文駱尚廉
口試委員(外文):Hwong-Wen MaShang-Lien Lo
口試日期:2015-07-06
學位類別:碩士
校院名稱:國立臺灣大學
系所名稱:環境工程學研究所
學門:工程學門
學類:環境工程學類
論文種類:學術論文
論文出版年:2015
畢業學年度:103
語文別:中文
論文頁數:102
中文關鍵詞:焚化飛灰水洗程序飛灰再利用技術生命週期評估成本效益分析
外文關鍵詞:MSWI fly ashWashing processFly ash reuse treatmentLife cycle assessmentCost benefit analysis
相關次數:
  • 被引用被引用:3
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在現今全球人口增加的狀況下,都市廢棄物的產生隨之漸增,伴隨而來的垃圾處理技術也須進行考量,自從民國80年開始,政府開始推廣以「焚化為主,掩埋為輔」的垃圾處理政策,以減輕垃圾掩埋的負擔,但焚化廠還是會產生殘渣,包含飛灰及底渣,其中飛灰被定義為有害廢棄物,更必須妥善處理飛灰,而我國最常使用技術為固化掩埋,反而更增加掩埋場的負擔,因此近幾年台北市政府開始推動焚化飛灰再利用的方案,鼓勵各焚化廠將飛灰妥善再利用,例如再利用成水泥、紅磚、鹼劑、飛灰熔融處理製成骨材等,不過這些再利用技術十分新穎,飛灰添加後會造成製程環境衝擊增大,在本研究目的主要探討目前國內外常用焚化飛灰處理及再利用技術之環境衝擊與成本,評估最合適的飛灰再利用技術。
本研究探討飛灰處理流程為經飛灰水洗程序後,接著四個情境,1)固化掩埋、2)再利用成水泥、3)再利用成紅磚、4)再利用成鹼劑於華爾滋法,因此本研究分為兩個階段,第一部分為飛灰水洗前後進行實驗分析重金屬成分,來了解水洗前後飛灰性質的差異,第二部分則比較飛灰處理及再利用流程的生命週期評估,盤查程序的資料透過實廠及文獻得到,並使用SimaPro生命週期評估軟體及衝擊評估IMPACT 2002+進行最後環境衝擊結果的闡述。在實驗結果部分,發現雖然水洗後飛灰毒性較為穩定,但水洗後飛灰會有重金屬富集現象;而在生命週期評估比較後結果,以情境四衝擊最低,其次為情境三、情境一,衝擊最高則是情境二,主因為情境四中回收氧化鋅效益過高,而使此情境接近零衝擊。
未來隨著人口增加,土地利用不足等問題,在焚化飛灰再利用的議題越顯重要,更需要其他飛灰再利用的研究進行探討,如其他經濟、社會層面的考量、飛灰重金屬再利用後溶出狀況,從環境衝擊角度來看,本研究可提供政府焚化飛灰再利用於環境衝擊層面的比較與考量,選擇飛灰再利用較佳的方案以作為政策。


As global population has increased, the generation of municipal solid waste has also increased and its treatment is a salient issue for many governments. Fly ash is a byproduct of solid waste incineration and is regarded as hazardous waste. Yet fly ash can be reused in cement, bricks, alkaline, aggregate sand other treatments. However, these fly ash reuse treatments might create higher environmental impacts. Therefore, the study aims to discuss the most common fly ash reuse and treatments and evaluate them by environmental impact and cost benefit analysis, to choose the better fly ash reuse treatment alternatives.
This research discusses four kinds of fly ash treatments scenarios: 1) Landfill after solidification, 2) Reuse as cement, 3) Reuse as bricks, 4) Reuse as alkaline in Waelz process, and evaluates each in two parts. The first part experimental, which analyzed heavy metal composition before and after washing process. The second part is to evaluate fly ash reuse treatment by life cycle assessment. Inventory data were obtained from commercial operation factories and references, and LCA software SimaPro and environmental impact model IMPACT 2002+ were used to evaluate the outcome of LCA.
It was found that although washed fly ash can stabilize toxic substances, it also can increase heavy metal concentration, In LCA portion, the highest impact scenario is scenario 2, second is scenario 1, third is scenario 3, the lowest impact is reusing as alkaline of the low impact of scenario 4 is due to the benefit from recycling zinc.
Fly ash reuse treatment will be increasingly important and will require many considerations. In terms of environmental impact, this research aims to provide a holistic comparison between different fly ash reuse treatments to further recommendation of better fly ash reuse treatment.


中文摘要 I
Abstract II
目錄 III
圖目錄 V
表目錄 VI
第一章 緒論 1
1.1研究動機與目的 1
1.2研究架構與流程 2
第二章 文獻回顧 4
2.1 焚化飛灰性質 4
2.1.1焚化飛灰定義及來源 4
2.1.2焚化飛灰之基本性質 5
2.1.3水洗後焚化飛灰之性質 7
2.2焚化飛灰處理及再利用技術 7
2.2.1分離處理 8
2.2.2熱處理 10
2.2.3固化穩定化 10
2.2.4 焚化飛灰再利用 11
2.2.3國內外處理及再利用現況 20
2.3生命週期評估 21
2.3.1方法介紹 21
2.3.2衝擊評估模式介紹 24
2.3.3生命週期評估之敏感度與不確定性分析 27
2.3.4生命週期評估之在地化 29
2.3.4焚化飛灰再利用之生命週期評估 32
2.4成本效益分析 34
2.4.1方法介紹 34
2.4.2環境成本效益評估 36
第三章 研究方法 37
3.1 焚化飛灰水洗前後之性質分析 37
3.1.1飛灰採樣 37
3.1.2表面質地分析 37
3.1.2重金屬含量分析 38
3.2 生命週期評估方法 40
3.2.1目標與範疇界定 40
3.2.2盤查分析 43
第四章 結果與討論 51
4.1 焚化飛灰水洗前後之基本性質 51
4.1.1 表面分析及半定量分析 51
4.1.2 重金屬分析 55
4.2 飛灰處理技術之生命週期評估 58
4.2.1水洗前處理之環境衝擊 58
4.2.2水洗飛灰處理及再利用方案之環境衝擊 60
4.2.3各方案之環境衝擊比較 65
4.2.4各方案之環境衝擊比較(不考慮效益) 71
4.2.5各方案之溫室效應潛勢 73
4.3 生命週期評估之效益、敏感度分析與不確定性分析 74
4.3.1再利用飛灰於建材之敏感度分析 74
4.3.2各情境之敏感度分析 78
4.3.3各情境生命週期評估之不確定性分析 81
4.4 飛灰處理技術之成本效益分析 84
4.5 綜合效益評估 90
第五章 結論與建議 92
5.1 結論 92
5.2 建議 94
參考文獻 96





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