双室微生物燃料电池利用乙酸钠和淀粉产电研究

研究了厌氧活性污泥接种的双室微生物燃料电池(Microbial Fuel Cells，MFCs) 分别供给以乙酸钠和淀粉为底物的人工配水的产电情况和有机物去除效果. 结果表明，MFCs中能量的输出与底物的种类有关，使用乙酸钠和淀粉达到的最大输出电压分别为0.43和0.39 V，最大功率密度分别为36.03和 6.32 mW/m2，简单底物的输出电压和功率密度高于复杂底物. MFCs在产电同时还可有效去除水中的有机物，288 h时以乙酸钠和淀粉为底物的MFCs中TOC的去除率分别为91.15%和83.20%，NH₃-N的去除率分别为90.31%和86.20%. 扫描电镜发现，2种底物下MFCs阳极表面的微生物形态差异显著，以乙酸钠为底物的MFCs阳极表面生物相主要为杆菌和弧菌；以淀粉为底物的阳极表面主要是球菌，表明不同底物条件下MFCs中所形成的微生物优势种群也不同. 

Electricity Generation from Sodium Acetate and Starch by Two Chambers Microbial Fuel Cells

The electricity generation and organic substances removal performance were investigated with sodium acetate and starch as carbon sources respectively in two chambers microbial fuel cells (MFCs), which were inoculated with anaerobic activated sludge. The results show that power output of MFCs was related to substrates. The maximum output voltage and power density of an MFC with sodium acetate were 0.43 V and 36.03 mW/m², and those of an MFC with starch were0.39 V and 6.32 mW/m². It was indicated that the values of maximum output voltage and power density of MFCs with simple substrates were higher than those of MFCs with complex substrates. Run time 288 h, TOC removal rate of 91.15% and NH₃-N removal rate of 90.31% were obtained with sodium acetate, and 83.20% and 86.20% with starch respectively. It was shown that MFCs were capable of disposing organic substances in wastewater effectively, and generating electricity simultaneously. Obvious differences of bacterial morphology in two anode chambers were observed by SEM, bacilli and vibiro were predominance using sodium acetate, but cocci was superiority using starch. It was explored that different substrates in MFCs resultedin different predominant microbial population formed.