DMF廢水的回收再利用一直以來皆有許多不同的處理方式，其中有效地分離純化DMF廢水是具有經濟效益且可以達到環境保護的做法。
　　由於目前商業運轉DMF廢水回收系統，均是以雙塔蒸餾方式回收高純度DMF為主。對於國內較小規模代處理業者而言，雙塔建置成本不僅較高且處理小量廢液較不適宜。為提高回收DMF經濟價值，需開發簡易型DMF回收系統強調DMF純度能與新品一致且系統總成本能低於原有雙塔程序設計為原則。本研究提出閃蒸塔與單一蒸餾塔組合成的回流操作DMF回收系統並進行各項分析與評估工作。利用Aspen Plus為主模擬平台綜合評估各項分析指標包括耗能，純度，操作彈性等結果，確認提出的具回流操作型態DMF回收系統有達到環保排放之標準，並且需符合合作廠商預期要求後進行初步的製程動態模擬。

There are many DMF recovery techniques for the DMF-containing wastewater, where the effective separation/purification of DMF can achieve economic benefits as well as meet the criterion of environmental protection. Currently, the commercialized DMF recovery plant adopts the two distillation columns to recover the high-purity DMF. However, the capital cost of two column design is large, so it is not suitable to treat the small amount of DMF wastewater. To address the revenue of DMF recovery technique, a simplistic DMF recovery system is developed to guarantee the high-purity of DMF that even compete the price of the new DMF product. The study develops a combination of a flash drum and a distillation column to carry out the reflux DMF recovery system. The evaluation and analysis of the design include energy consumption, purity and flexibility. Finally, the DMF recovery system can achieve the criterion of wastewater effluent. After its performance meet the request of cooperation company, the dynamic simulation of the process would be performed.

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