- 學位論文
利用糖類發酵過程製作微生物燃料電池之研究
Study microbial fuel cell in carbohydrate fermentation process
摘要
新能源開發是各國致力發展的重點，其中微生物燃料電池更是近年來科學家努力開發的研究方向。微生物燃料電池係利用微生物在其新陳代謝成長過程，分解有機物質產生電子，並透過導線將電子傳送到電子接受者，形成一個完整的通路。在其陽極、陰極介面間，藉由將生物催化之氧化反應和某一氧化劑之還原反應結合在一起，將化學能轉化為電能。本研究利用糖類發酵過程製作微生物燃料電池，並設計一套裝置，以碳布為陽極、白金片為陰極，並在陽極添加不同百分比之糖類來測量微生物燃料電池之效能，探討糖類發酵酒精過程製作微生物燃料電池之可行性。研究亦探討菌種的培養溫度、培養的時間、及其他影響微生物燃料電池產電效能之因素。實驗結果顯示其最佳化條件為，使用BCRC-21686葡萄酒酵母菌在37℃經過搖瓶培養24小時為微生物的來源，陰極槽電解液為以磷酸緩衝溶液控制於pH 7.5並通入空氣，陽極表面積選擇2㎝2，整個系統外接10000Ω電阻。在此最佳化條件，不同糖度培養基添加不同百分比酵母菌液發酵，測得電壓為0.31V，換算能量密度為49.73mW/m2，酒精產量可達到11.06%。基於永續發展的理念，再生利用是很重要的一環，此微生物燃料電池不但可以產生電能又提高酒精的產量，是值得開發的能源。
關鍵字
微生物燃料電池並列摘要
Microbial fuel cells (MFCs) are kinds of clean energy sources which using microorganisms to catalyze the conversion of organic matter to electrical energy directly. In this study, direct generation of electricity from carbohydrates under the ethanol fermentation process was investigated in a newly designed dual-chamber MFC using a carbon cloth as anode and platinum (Pt) as the cathode. Factors influencing the performance of the MFC were studied under the addition of various percentages of carbohydrates in the anode chamber and other factors which facilitates the production of carbohydrates in the ethanol fermentation process in the MFC such as bacteria culture temperature, the incubation time, and other implications of MFC were also investigated for power efficiency factors. Experimental results show that the optimal conditions were achieved using BCRC-21686 wine yeast in conical flask at 37 ºC for 24 hours as the microbial source in the anode chamber, phosphate buffer (pH 7.5) as the electrolyte in the cathode chamber with constant air purging, Pt (2 cm2 surface area) as the anode and the whole system external resistance was 10000Ω. Under the optimal conditions, the measured voltage was 0.31V and the maximum power density was 49.73mW/m2. Under the addition of different media at different percentages of yeast into the ethanol fermentation liquid, ethanol output was reached to 11.06%. These results suggest that it is feasible to link the alcohol fermentation process and electricity production using MFCs in order to achieve both bio-energy production and facilitate the alcohol production.
並列關鍵字
Microbial fuel cells參考文獻
延伸閱讀
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