5-1 結論
本研究以稻殼作為生產纖維酒精之原料，又以完全利用稻殼為目的，
因此利用氫氟酸搭配鹼性過氧化氫前處理方法使稻殼結構鬆散化，以 提升葡萄糖產率且可將灰分回收再利用。綜合對於稻殼進行前處理的 各個條件，以及其所造成之成分變化分析和葡萄糖產率的探討比較後，
本研究獲致下列結論：
1. 本研究水解反應根據處理之目標物判斷無需加入纖維雙醣酵 素也可將稻殼水解為單醣。
2. 對稻殼做氫氟酸前處理之結果，在氫氟酸與二氧化矽莫耳比為 14 時，灰分去除達 90%以上，其葡萄糖產率僅約 6%，後續便 將莫耳比14 處理過的稻殼再以鹼性過氧化氫處理，以達去除 木質素使葡萄糖產率提升之目的。
3. 以處理後葡萄糖產率為前提使用鹼性過氧化氫添加量為 4 時，
木質素去除率高達80%，木質素對稻殼造成之束縛降為最低，
又其產率為99%，酵素幾乎能將此處理過之稻殼的纖維素及半 纖維素完全水解為醣類以供酵母醱酵；若以原始葡萄糖產率為 考慮時，其鹼性過氧化氫最佳添加量為3，約為 83%，過多添 加則為浪費。
4. 使用鹼性過氧化氫處理的稻殼其酵素水解醣產量明顯高於單 獨使用氫氧化鈉或過氧化氫，因過氧化氫在鹼性情況下行氧化 作用較為劇烈，推論能溶解較多的木質素與半纖維素，使纖維 素百分比與酵素水解醣產量提升。
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5. 由酵素水解不同過氧化氫與氫氧化鈉添加比例處理稻殼之醣 產量和葡萄糖產率結果得知，總醣產量於添加比例為4 時達到 最高，而葡萄糖產量卻隨比例增加而增加，木糖產量則趨於減 少，推論越多氫氧化鈉處理稻殼，越易去除半纖維素；然而葡 萄糖產率於添加比例為4 時達到最高，增加劑量添加比並不會 使產率提升，更造成纖維素流失及藥劑浪費。
6. 以氫氟酸萃取出的灰分經本實驗室回收後便能製成不同中孔 洞材料，以達完全回收再利用之目的。
7. 在探討氫氟酸搭配鹼性氫氧化鈉完全前處理中氫氟酸的貢獻 程度的研究中，若使用氫氟酸搭配鹼性過氧化氫處理稻殼後，
木質素及其他成分有更多的去除，使纖維素之單位百分比上升，
尤其木質素的去除率更是較無氫氟酸處理之從60%提升至 80%，而處理葡萄糖產率也從 86%提升至 99%。有氫氟酸先處 理過，能將灰分幾乎萃取出來進行回收，又使木質素有些許破 壞，鬆散了稻殼結構，令後續的鹼性氫氧化鈉前處理更易發揮 作用，溶解出更多的木質素。
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5-2 建議
1. 本研究使用鹼性過氧化氫處理過後之廢液為一鹼性溶液，為達 充分回收利用，可將此鹼性溶液重覆對稻殼作前處理。
2. 本研究使用鹼性過氧化氫處理過後之廢液富含木質素，而目前 已有一些研究能將木質素回收為許多用途(黃修志，2001；
Joiner 2005)，如作為橡膠的補強劑、水泥的增塑劑、印染工業 的分散劑和染料助劑、油墨分散劑、礦石浮選劑、工業洗滌劑、
鍋爐清潔劑等，建議能將木質素回收以達到零排放之目的。
3. 本研究並未完成纖維酒精之完整程序，只著重於前處理改善酵 素水解之階段，惟因目前醱酵研究已趨於完整並已實廠化，且 其轉化效率也可達95%以上，並不是纖維酒精研究之重點，但 建議仍可參考實廠數據建立醱酵系統，完成纖維酒精生產。
4. 本研究只對農業廢棄物中之稻殼作探討，若要全面針對農業棄 物做完全回收再利用，需進一步探討其他農業廢棄物，例如稻 桿、蔗渣、玉米葉等，其因成分與形態不同，前處理之方法與 條件也需做調整。
5. 本研究所使用之氫氟酸可以台灣科技園區所使用之廢氫氟酸 來替代，可令處理成本大輻減少又達成廢棄物資源化之目的。
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中文文獻
全球農業統計資料庫，(2010) http://faostat3.fao.org/home/index.html。
行政院農委會，(2010) 「99年農業統計年報」，
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