电极面积对老龄垃圾渗滤液为底物的微生物燃料电池性能影响

Effects of electrode surface area on the performance of microbial fuel cells with the aging landfill leachate as substrate

    摘要
  • 摘要: 构建生物阴极型双室微生物燃料电池,处理老龄垃圾渗滤液。研究了阳极与阴极面积比值对微生物燃料电池产电能力和对老龄垃圾渗滤液处理效果的影响。结果表明,阳极与阴极面积比为1:2、2:2、2:1的3组生物阴极型微生物燃料电池输出电压分别为408、452、396mV,最大电功率密度分别为145.73、237.65、136.50mW/m3,内阻分别为350、200、400Ω,COD的去除率分别为21.18%、20.20%、22.31%。3组微生物燃料电池运行30d后,垃圾渗滤液中氨氮、硝酸盐氮、亚硝酸盐氮浓度均下降,其中,氨氮去除率分别为80.88%、73.61%和66.17%,其去除效果与产电性能相关。

     

    Abstract: Bio-cathode microbial fuel cells (MFCs) were built to treat the aging landfill leachate; the effect of electrode surface area on the aging landfill leachate treatment and electrical performance of MFCs was investigated. The results show that for three sets of bio-cathode MFCs with the ratios of anode area to cathode area being 1:2, 2:2 and 2:1, the stable maximum output voltages are 408, 452 and 396mV, respectively, with the maximum electric power density of 145.73, 237.65 and 136.50mW/m3, the resistance of 350, 200 and 400Ω, and COD removal rate of 21.18%, 20.20% and 22.31%, respectively. After running for 30 days, the concentration of ammonia, nitrate and nitrite nitrogen in landfill leachate is decreased; the ammonia removal rates for the three sets of MFCs are 80.88%, 73.61% and 66.17%, respectively, which is related to the electricity generation of MFCs.

     

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