https://scholars.lib.ntu.edu.tw/handle/123456789/63792
標題: | 施加陽極電位對硫酸鹽還原菌微生物燃料電池性能的影響 Effects of Applied Anode Potential on SRB-MFC Performances |
作者: | 周子揚 Chou, Tzu-Yang |
關鍵字: | 微生物燃料電池;硫酸鹽還原菌;陽極電位;Microbial FUel Cell;Sulfate Reducing Bacteria;Anode Potential | 公開日期: | 2012 | 摘要: | 在本實驗中,接種硫酸還原混合菌的雙室微生物燃料電池 (SRB-MFC),分別餵以含有乳酸和硫酸之人工廢水,以研究陽極電位對MFC電化學性能 以及陽極上的微生物群落(ARB)的影響。 此實驗針對三種不同陽極電位(-0.3V,+0.3 V和無)來對微生物燃料電池的影響進行分析。結果顯示,使用負的陽極電位可有效提高SRB-MFC的性能。在SRB-MFC的啟動實驗中,負的陽極電位加速啟動時間至4天,並導致MFC功率密度的增加,從第一天到第7天增至600%。此外,它更進一步獲得改善,COD去除率為93.75%,並保持低硫化物濃度的積累 (7 ppm)。在SRB-MFC的成熟生物膜實驗中,負陽極電位可使較高的電流從SRB-MFC中產生 (0.2 V),以及獲得更高的功率密度(80 mW/m2),從極化電阻的改變證明了微生物的活性增加 (30kΩ增加到 90kΩ)。最後,在雙陽極MFC實驗於陽極電位的影響中進行之研究,結果發現,外加陽極電位不但影響了目標陽極上的微生物菌群,也同時影響陽極周遭的微生物菌群。 In this experiment, dual chamber MFCs inoculated with SRB mixed culture were fed with artificial wastewater containing lactate and sulfate. Different anode potentials were applied on each MFC reactor to investigate the effect of anode potential on MFC electrochemical properties as well as the microbial community of Anode respiring bacteria (ARB). Three different anode potential (-0.3V, +0.3V and none) were applied on MFC reactors. The results indicated that the use of a negative anode potential was far superior to a positive one for enhancing SRB-MFC performance. In the SRB-MFC start up experiments, negative anode potential accelerated the start-up time to 4 days leading to an increase of 600% in MFC power density from Day 1 to Day 7. Also, it had improved COD removal efficiency to 93.75% and maintained a low sulfide accumulation, 7 ppm, over the operating period. In the SRB-MFC mature biofilm experiments, negative anode potential led to the higher current production from SRB-MFC, 0.2 V, higher power density, 80 mW/m2 and higher microbial activity in the form of increased polarization resistance, from 30 kΩ to 90 kΩ over the operating period. Finally, the effect of applied anode potential on dual anode MFC design was studied. It was found that the applied anode potential not only exert its influence on its target but also on its targets’ proximity, suggested by the DGGE results. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/252108 |
顯示於: | 化學工程學系 |
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ntu-101-R99524094-1.pdf | 23.54 kB | Adobe PDF | 檢視/開啟 |
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