- 學位論文
都市垃圾焚化飛灰添加於陶瓷濾膜進料之生命週期評估
A Study on the Life Cycle Assessment of MSWI Fly Ash Recycling as the Feedstock of Ceramic Membrane Manufacturing
摘要
垃圾焚化飛灰為焚化爐燃燒垃圾之廢棄物內含重金屬與戴奧辛，目前處理方法為使用水泥固化掩埋，但在掩埋場容積日漸減少的情況下，面臨無路可去的命運，將其資源化循環再利用為綠色陶瓷濾膜進料，成為焚化飛灰處理之最佳解決方案之一。但焚化飛灰資源化過程中，重金屬穩定及破壞戴奧辛等一連串的製程，造成整體環境的衝擊是值得討論的，以免解決了焚化飛灰的問題，卻帶來更多的環境問題，故利用生命週期評估方法來評估其對環境之衝擊。 然而大部分之生命週期評估都是站在生產者的角度進行，垃圾焚化飛灰再利用於綠色陶瓷濾膜進料卻是站在回收者的角度，故運用文獻計量法分析各國的分析方法及研究方向，其中運用Bibliometrix、VOSviewer及CiteSpace軟體進行可視化研究，了解該議題之研究趨勢與成果；之後再利用情境分析，配合生命週期評估ISO14040:2020及ISO14044:2020之規範進行模擬，其中情境A為現今之焚化飛灰處理流程，包含水泥固化、掩埋，加上陶瓷濾膜製作，係以實場進行生命週期評估；情境B為焚化飛灰再利用為綠色陶瓷濾膜原料，加上綠色陶瓷濾膜廠之模廠數據放大模擬進行生命週期評估。 經由文獻計量分析發現，飛灰及生命週期評估在WoS資料庫中之研究快速成長，研究方向則偏向再利用於水泥製品，以及做為混凝土之摻料減少水泥的用量。另外在生命週期評估的部分，焚化飛灰再利用於綠色陶瓷濾膜之情境B，在Eco-indicator 99中之各項指標中都優於情境A，特別在致癌性、溫室氣體方面有顯著的優勢，為節能減碳、循環經濟不可或缺之一環。
並列摘要
Waste incineration fly ash is the residue from the incinerator, it contains heavy metals and dioxins. Using cement to solidify it, followed by landfilling, is the current process. However, the volume of landfill sites is decreasing, turning it into a resource and recovering as part of the feedstock for green ceramic filter membranes, becoming one of the best solutions in the future. However, in the process of recycling, heavy metals will be stabilized and dioxins will be destroyed, but the impact on the overall environment is worth studying. Most of the life cycle assessments are carried out from the perspective of producers, while the reuse of incineration fly ash as feed material for green ceramic membranes is from the perspective of recyclers. Therefore, bibliometric methods were applied, to analyze the research in various countries. Bibliometrix, VOSviewer, and CiteSpace software were applied to conduct the visual research, and to understand the research trend and results in this field. Furthermore, the scenario analysis was conducted to simulate the life cycle assessment following ISO14040:2020 and ISO14044:2020 specifications. In this study, scenario A is the current situation, including the incineration fly ash treated by cement solidification followed by landfill, combined with ceramic membrane production; scenario B is incineration fly ash was stabilized by washing and wet milling, then reused as a part of the feedstock of green ceramic membranes production, in which, a pilot plant study data were applied in the simulation for life cycle assessment. The results of the bibliometric analysis showed that the research on fly ash and life cycle assessment in the WoS database is growing rapidly, and the research direction is tending to reuse cement products, and an admixture of concrete to reduce cement usage. In the results of the life cycle assessment, the process of recovering the incineration fly in the green ceramic filter membrane production, was superior to scenario A at all indicators, especially in the items of carcinogenicity and greenhouse gas emission, which has significant advantages on energy saving and carbon reduction and satisfied the principle of the circular economy.
參考文獻
延伸閱讀
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