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研究生： 林以萱
Lin, Yi-Syuan
論文名稱： 咖啡渣再利用之研究
Reuse of Spent Coffee Grounds
指導教授： 周榮華
Chou, Jung-Hua
學位類別： 碩士
Master
系所名稱： 工學院 - 工程科學系
Department of Engineering Science
論文出版年： 2014
畢業學年度： 102
語文別： 中文
論文頁數： 68
中文關鍵詞： 咖啡渣 、太陽能真空管 、索氏萃取 、GC-MS 、疏水角 、重金屬吸附
外文關鍵詞： Spent coffee grounds, Solar vacuum tube, Soxhlet extraction, GC-MS, Contact angle
相關次數： 點閱：225  下載：51 
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    • 台灣咖啡渣一天就可以達30噸的丟棄量，然而咖啡渣是非常具有經濟價值的廢棄物，故本研究的目的為咖啡渣回收再利用。以三種不同處理過程的咖啡渣進行比較，分別為未處理、發霉、經太陽能真空管前處理咖啡渣。將這三種咖啡渣進行油脂量、重金屬吸附、疏水角量測並比較其結果。經由索氏萃取器將咖啡渣油脂抽出，萃取有機溶劑為正己烷，而以有經太陽能真空管前處理之咖啡渣油脂量最高。使用GC-MS分析得知咖啡渣油脂中脂肪酸比例，其中飽和脂肪酸以肉豆蔻酸、棕櫚酸最多；分析顯示太陽能真空管能將部分肉豆蔻酸、棕櫚酸抽出。另外將抽取油脂完的咖啡渣用來做重金屬鉛吸附實驗，實驗顯示有經太陽能真空管前處理之咖啡渣最多可以達到鉛去除率99%的效果。咖啡渣具有親油疏水的特性，可用來做為環保疏水原料，針對咖啡渣疏水角度進行測試，結過顯示疏水角測試發霉的咖啡渣角度最大，疏水角度可到143度。

    This study reused spent coffee grounds for heavy metal adsorption. Three types of spent coffee grounds, including untreated, mildewed, solar vacuum tube processed are investigated for their merits. The experiments contained spent coffee grounds grease extraction, heavy metals adsorption, and hydrophobic angle measurements. The Soxhlet extractor for coffee grounds grease extraction used n-hexane as the organic solvent; the solar pre-processed spent coffee grounds yielded the highest amount of oil content. Also, GC-MS analysis showed that the proportion of coffee oil being the fatty acid residue, in which the saturated fatty acids were myristic acid and palmitic acid. The solar treated spent coffee grounds contained myristic acid and palmitic acid. Pb adsorption experiments showed that solar treated spent coffee grounds could remove up to 99% of Pb. The results of contact angle measurements showed that the mildewed spent coffee grounds had the largest contact angle of the three and was about 143 degrees.

    摘要 I Abstract II 誌謝 V 目錄 VI 表目錄 IX 圖目錄 X 符號說明 XIII 第一章緒論 1 1-1前言與研究動機 1 1-2文獻回顧 3 第二章基礎理論 20 2-1太陽能真空管 20 2-1-1太陽能真空管製作原理 20 2-1-2熱傳輻射基本理論 22 2-2索氏萃取器 25 2-2-1原理 25 2-2-2索氏萃取油脂比重 26 2-3脂肪酸分類 27 2-4重金屬吸附 28 2-4-1吸附理論 28 2-4-2吸附法 29 2-4-3離子交換法 31 2-4-4萃取法 31 2-4-5薄膜分離法 32 2-4-6重金屬介紹 33 2-5潤濕現象 34 2-5-1潤濕現象的定義 34 2-5-2方程式介紹 35 2-5-3表面張力原理 38 2-5-4表面張力的測定方法 39 第三章 實驗流程與設備 40 3-1實驗流程 40 3-2實驗設備 41 3-2-1太陽能真空管蒸餾實驗 41 3-2-2索氏萃取器實驗架設 45 3-2-3重金屬鉛吸附實驗 47 3-2-4接觸角測試 49 3-3 GC設定條件 51 第四章結果與討論 52 4-1 前言 52 4-2索氏萃取實驗結果 52 4-3重金屬吸附實驗結果 54 4-4接觸角實驗結果 55 4-5 氣相層析分析結果 56 4-6 咖啡渣SEM結果 59 第五章結論與建議 61 5-1 前言 61 5-2 結論 61 5-3 未來建議 62 參考文獻 63 附錄一GCMS分析圖 66

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