阳极添加三价铁离子对沉积型微生物燃料电池运行特性的影响

发布时间：2019-01-23 09:23

【摘要】：以剩余污泥为底物和接种物,借助电化学交流阻抗等电化学分析方法,研究了阳极投加三价铁离子对沉积型微生物燃料电池(sediment microbial fuel cell,SMFC)电能输出及内阻分布的影响。结果表明,500 mg/L铁离子可有效改善SMFC的运行特性,功率密度峰值、底物降解速率和阳极污泥絮体大小分别上升到103.09 m W/m~2、35.68 mg VSS/(m~3/h)和190.33μm。电化学阻抗谱分析表明,阴极欧姆内阻及极化内阻随铁离子浓度增加而降低,阳极内阻则随铁离子浓度增加先降低后增加,当三价铁离子添加浓度为500 mg/L时,阳极欧姆内阻和活化内阻与对照组相比分别下降了45.28%和47.97%。
[Abstract]:The effects of anodic addition of ferric ion on the electric energy output and the distribution of internal resistance of (sediment microbial fuel cell,SMFC were studied by electrochemical impedance spectroscopy (EIS) with the residual sludge as substrate and inoculum. The results show that 500 mg/L iron ions can effectively improve the operation characteristics of SMFC. The peak power density, the degradation rate of substrate and the size of anodic sludge floc increase to 103.09 MW / m ~ (2 +) ~ 35.68 mg VSS/ (m ~ (3 / h) and 190.33 渭 m 路m ~ (-1), respectively. Electrochemical impedance spectroscopy (EIS) analysis showed that the internal resistance of cathode ohm and polarization decreased with the increase of iron ion concentration, and the anode internal resistance decreased first and then increased with the increase of iron ion concentration. When the concentration of trivalent iron ion was 500 mg/L, the internal resistance of cathode and polarization decreased with the increase of iron ion concentration. Anodic ohmic resistance and activation resistance decreased by 45.28% and 47.97%, respectively.
【作者单位】：江南大学环境与土木工程学院环境生物技术研究室;江苏省厌氧生物技术重点实验室;江苏省水处理技术与材料协同创新中心;
【基金】：国家自然科学基金资助项目(21076097,21206058) 国家水体污染控制与治理科技重大专项(2012ZX07101-013-04) 中央高校基本科研业务费专项资金资助项目(JUSRP111A09)
【分类号】：X703;TM911.45

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