| 摘要: | 本研究藉由文獻蒐集廢軟性印刷電路板(WFPCB)之金元素回收精煉製程的應用與
回收現況，透過相關法令及國際組織和產業提供之統計數據，調查金的回收原料、製
造、廢棄等相關資料，調查回收精煉製程的碳足跡，並將各階段活動量化的數據，借
由改善前後的比較，進一步了解作業排放熱點，及了解在製造、使用、廢棄對環境的
影響，並提出相對應的改善對策建議，也藉由盤查結果提出回收技術提昇的方向。
在碳盤查的過程中了解到廠務系統的作業是以全廠區用量規劃建置，當外在環境
變化時而基礎用量不變下，就會影響到每單位的碳排放量，在提高精煉金的回收率時
所進行的工法及流程變更作業時不僅僅是降低製程損耗，也減少廢水使用的藥劑量，
但在進行自動工程時也增加了用電量，這說明在改善規劃階段，同時也要將上下游作
業站一同規劃，做全面性相關聯的考量，以發揮最佳的成效。
盤查廢軟性印刷電路板(WFPCB)之金元素回收精煉製程碳足跡結果為，2021年總
碳排量89,306.6884公噸 CO2e/年，2022年總碳排量68,253.1933公噸 CO2e/年。2021
年回收每公克黃金碳排放量4.3379公噸 CO2e/年，2022年回收每公克黃金碳排放量
3.7721公噸 CO2e/年。2021年碳排放熱點為製程43,706.8963公噸 CO2e/年，其次為
能源間接42,466.0665公噸 CO2e/年，2022年碳排放熱點為能源間接36,148.2784公
噸CO2e/年，其次製程(P)29,023.5636公噸 CO2e/年。但由於部份數據取得不易，所
以本次盤查的範圍不包含廢棄物處理、廢水處理作業、員工通勤、上下游供應商，有待
以後持續盤查將數據結合，以了解回收廢軟性印刷電路的整個生命週期的碳排放量。
希望藉由本研究的盤查所獲得回收精煉製程的碳足跡數據分佈狀況及特性，提供
未來回收精煉製程及工程規劃時在導入量產可以減少能耗的投入及提高回收產品的利
用率，並降低在回收的過程中的碳排放量和電子廢棄物造成環境的影響的參考依據，
及朝向以循環經濟模式賦予廢棄物新生命。
;This research surveys the application and recovery rate of recycling and refining process of gold element. The research investigated the recovered materials of gold, its production process, its waste, and its carbon footprint of the recycling and refining process. Data collected from each stage were quantified to compare before and after improvement to understand carbon emissions and its influence on our environment in manufacturing, usage, and waste. According
to the result of the inventory, this research also offered some suggestions of a new direction of recycled technique.
The inventory of the recycling and refining process of gold element from the waste flexible printed circuit board(WFPCB) shows that the total amount of carbon emission was 89,306.6884 tonne CO2e per year in 2021 and 68,253.1933 tonne CO2e per year in 2022. Carbon emissions per gram of recycled gold is 4.3379 tonne CO2e per year in 2021, and 3.7721 tonne CO2e per year in 2022. In 2021, projects with the highest carbon emissions was manufacturing of 43,706.8963 tonne CO2e per year, and secondarily comed by energy indirect greenhouse gas emission, which was 42,466.0665 tonne CO2e per year. In 2022, projects with the highest carbon emissions by energy indirect greenhouse gas emission 36,148.2784 tonne CO2e per year and manufacturing (P)29,023.5636 tonne CO2e per year. However, since part of the data was hard to collect, waste disposal, wastewater treatment, employee commuting, the supplier of the upstream and downstream were excluded from this research. Follow-up inventories were needed for further understanding of the carbon emissions of the whole
recycling and refining process.
Based on the data collected from the inventory, this study provides a reference for reducing energy waste in the recycling and refining process, improving the utilization rate of recycled products, reducing carbon emissions in the recycling process, and the environmental impact of e-waste. The aim of the research is to promote a circular economy and give new life
to waste. |
