电化学法改性阳极对MFC性能的影响

采用不同质量分数的NH_4NO_3和(NH_4)_2S_2O_8溶液作为电解液,对双室微生物燃料电池的阳极炭布进行改性。以餐厨废水作为阳极底物,以K_3Fe(CN)_6]和NaCl混合溶液为阴极液,考察不同电解液改性阳极条件下微生物燃料电池的产电性能及污水处理效果。结果表明,采用NH_4NO_3或(NH_4)_2S_2O_8改性炭布作为阳极的微生物燃料电池的发电性能和水处理效果均有改善。其中,采用质量分数为4%的(NH_4)_2S_2O_8溶液作为阳极改性电解液时,微生物燃料电池系统的产电性能达到最佳,其稳态电流密度约为60 m A/m~2,COD去除率约为42.5%。

Effect of electrochemically modified anode on the performance of MFC

NH₄NO₃ and (NH₄)₂S₂O₈ with different mass fractions were used as electrolyte to modify the anodic carbon cloth used in a double chamber microbial fuel cell. Using some restaurant wastewater as the anode substrate and the mixed solution of K₃Fe(CN)₆] and NaCl as catholyte, the power generation performance and wastewater treatment effect of a microbial fuel cell with modified anode by different electrolytes were studied. The experimental results show that the microbial fuel cell with modified anode by NH₄NO₃ and (NH₄)₂S₂O₈ has a better power generation performance and sewage treatment effect. The power generating ability and the purifying effect of the microbial fuel cell achieve the optimal state with the steady current density of about 60 mA/m² and the removal rate of COD of about 42.5% when the (NH₄)₂S₂O₈ of 4% mass fraction is used as the modified electrolyte of anode.