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    Title: 都市垃圾焚化飛灰添加於紅磚進料之生命週期評估
    Other Titles: A study on the life cycle assessment of MSWI fly ash recycling as the feedstock of brick manufacturing
    Authors: 蕭錫卜;Siao, Shi-bu
    Contributors: 淡江大學水資源及環境工程學系碩士班
    高思懷
    Keywords: 都市焚化飛灰;生命週期評估;環保紅磚;資源化;生命週期思維;MSWI fly ash;Life cycle assessment;green brick;recovery;Life Cycle Thinking
    Date: 2010
    Issue Date: 2010-09-23 17:58:16 (UTC+8)
    Abstract: 飛灰資源化為目前處理飛灰最佳的可行方案,但是在研發資源化技術過程中,必須同時考慮,資源化對整體環境的負載,以免解決了飛灰的問題,卻帶來更多的環境問題;因此如果能在研發的階段便導入生命週期思維,並模擬評估日後實廠的狀況,如此一來便能更清楚的掌握研發的方向,進而使日後研發出來飛灰資源化的技術對總體環境負載能降到最低。本研究運用生命週期評估技術,來模擬都市焚化飛灰資源化實廠化後對環境的影響,並使用生命週期軟體Simapro來分析;在此資源化的技術是以本研究室研發的焚化飛灰資源化為環保紅磚之技術為模擬分析的方向並提出改進方案;比較一般傳統紅磚、環保紅磚及將經生命週期評估後改進之第二代環保紅磚進行比較,以利日後研發及實廠建設之參考。
    結果發現利用焚化飛灰製作成環保紅磚原料之製程中,磷酸的使用對環境所造成的環境負荷最大、其次是電力的使用。而針對此結果,本實驗提出使用廢磷酸來取代磷酸的使用建議,且經過假設模擬後發現,可以大量的減少環境負荷。最後比較一般紅磚、環保紅磚及第二代環保紅磚的單點得分後可發現,一般紅磚的分數為3.77E-03 Pt、環保紅磚的分數為4.05E-03 Pt,兩者僅相差了2.08E-04 Pt,兩者相差十分接近,本結果完全顛覆了外界對飛灰資源化的觀感,在此之前普遍認為飛灰資源化為高耗能、對環境衝擊大,但整體來看,其實差距不大,而日後若能使用廢磷酸來穩定重金屬,此製成的第二代環保紅磚,其分數便少於紅磚為3.44E-03 Pt,因此對環境相對最友善,因此可作為日後研發的方向。
    The recovery is the best way to the management of municipal solid waste incinerator (MSWI) fly ash. However, we have to consider that the whole environmental load affected by recovery process for fear of causing more environmental problems after solving the problem of fly ash. Thus, if the Life Cycle Thinking could be introduced at the initial stage of research and full-scale simulated assessment, we might have a clear direction and improved skill for fly ash recovery to reduce the whole environmental load. In this study, Life Cycle Assessment was applied to simulate the environmental influence of in-plant recovery of fly ash and the Life Cycle program “Simapro” was adopted to perform this study. The technology assessed here was the recovery of fly ash for green brick manufacture which was developed from our research team. The improvement project was presented after the assessment and comparison of traditional bricks, green bricks and 2nd green bricks.
    The results indicated that the use of phosphoric acid has the biggest environmental load in the process of green brick manufacture and power was the next. Therefore, waste phosphoric acid was suggested for the substitute in the experiment and we found that it can reduce environmental load substantially. Finally, comparing with traditional brick, green brick and 2nd green brick, we found that single score of traditional bricks was 3.77E-03 Pt, the green brick was 4.05E-03 Pt. The difference between these two was only 2.08E-04 Pt. Before the assessment, people usually considered that the recovery of fly ash was high-energy consumption and high impact to environment. However, the results showed that recovery of fly ash didn’t spend much more than the traditional process, and further, if waste phosphoric acid was adopted for substitute in the production process of 2nd green brick, the single score was reduced to 3.44E-03 Pt which was less than the single score of traditional brick. Therefore, the process of 2nd green brick was the friendliest technology to environment that could be the further direction of research in the future.
    Appears in Collections:[水資源及環境工程學系暨研究所] 學位論文

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