SA-PQ-11/CF阳极提高MFC废水处理效果与发电性能

SA-PQ-11/CF anodes for improvement on MFC wastewater treatment efficiency and power generation performance

为提高微生物燃料电池(MFC)的废水处理效果和发电性能,制备了一种海藻酸钠(SA)-聚季铵盐-11(PQ-11)/碳毡(CF)阳极(SA-PQ-11/CF),分别以制药废水和糖蜜废水为阳极液,以CF为阴极,构建了MFC系统,采用SEM对阳极表面形貌进行了表征,通过循环伏安(CV)特性和电化学阻抗(EIS)特性、化学需氧量(COD)去除率对其性能进行了考察。结果表明,SA-PQ-11/CF阳极具有较大的比表面积,MFC的溶液电阻和电荷转移电阻得到明显降低。阳极液为制药废水时,采用SA-PQ-11/CF阳极的MFC的稳态输出电压和COD去除率分别约为0.22 V和62%,较常规CF阳极的MFC分别提高了100%和130%;阳极液为糖蜜废水时,采用SA-PQ-11/CF阳极的MFC的稳态输出电压和COD去除率分别为0.15 V和43%,分别较采用常规CF阳极的MFC提高了275%和95%。

In order to improve the wastewater treatment efficiency and power generation performance of microbial fuel cell(MFC),a sodium alginate(SA)-polyquaternium 11(PQ-11)/carbon felt(CF)anode(SA-PQ-11/CF)was prepared,and a MFC system was constructed using pharmaceutical wastewater and molasses wastewater as anolytes and CF as cathode,respectively.The anode was characterized by SEM for surface morphology analysis,and its performance was evaluated by cyclic voltammetry(CV),electrochemical impedance spectroscopy(EIS)and chemical oxygen demand(COD)calculation.The results showed that the SA-PQ-11/CF anode exhibited a large specific surface area,the solution resistance and charge transfer resistance of MFC significantly reduced.With the anolyte as pharmaceutical wastewater,the steady-state output voltage and the COD removal rate of MFC using SA-PQ-11/CF anode were about 0.22 V and 62%,respectively,100%and 130%higher than those using CF anode.When molasses wastewater was used as anolyte,the steady-state voltage and COD of MFC using SA-PQ-11/CF anode were 0.15 V and 43%,respectively,which were 275%and 95%higher than those using CF anode.