本研究利用流動式及批次式亞臨界水系統應用於檸檬桉葉內部防蚊成分香茅 醛之提取並與乙酸乙酯萃取法做比較，以流動式亞臨界水系統處理 2 g 檸檬桉葉後 所檢測到之最高訊號強度為 15 pA，代入檢量線中得到其濃度為 31.98 μg/mL，萃 取效率為 0.048%；而以批次式亞臨界水系統處理 20 g 檸檬桉葉後所檢測到之訊號 強度為 20 pA，帶入檢量線中得到其濃度為 41.77 μg/mL，萃取效率為 0.021%；以 乙酸乙酯 15mL 萃取 2 g 檸檬桉葉後所檢測到之訊號強度為 600 pA，代入檢量線中 得到其濃度為 1177 μg/mL，萃取效率為 0.88%。相比下，流動式之萃取效率高於 批次式，但兩者之萃取效率皆未高於有機溶劑萃取，甚至低了許多。以標準品進 行測試後推測其原因為香茅醛在高溫環境下會發生降解反應，因此造成其萃取效 率低落。
未來擬於動態式亞臨界水系統之萃取管前再加一段預熱管，將液體先於預熱 管中加熱至亞臨界狀態後，再將亞臨界水導入後端放有樹葉粉末的萃取管柱中，
期望將樹葉粉末暴露於高溫狀態的時間降低，以避免其降解，進而能達成較好的 萃取效率。未來研究之架構圖如 5-1 所示。
圖 5-1 未來擬使用之亞臨界水架構圖
以批次式亞臨界水系統處理廚餘部分，本研究嘗試以不同溫度進行單次開閥 實驗並比較其結果，發現 160°C 時能源利用效率最佳，但在實際應用上，單次開 閥所排去水分過少。因此以含水率 55%，重量為 65 g 之米飯進行定時多次開閥實 驗，實驗後含水率降至 10%以下，重量為 32 g，而實驗前後具有顯著含水率差異，
證明了多次開閥在實際應用上具有可行性。亦以 5 atm 為標準進行定壓開閥實驗，
將米飯進行定壓開閥實驗，亦成功將含水率由實驗前的 62%降至 10%以下。因此 目前初步實驗結果顯示以批次式亞臨界水系統處理廚餘可能具有可行性，但目前 亦有能源利用效率低落之問題。
未來擬以更多具有代表性之廚餘，例如纖維素類及蛋白質類，重複此實驗；
並必須增加能源利用之效率，才有進一步商品化成為處理社區廚餘系統之可能 性。
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