The effects of electrode on the electricity generating capacity of microbial fuel cell in the treatment of organic wastewater and copper-contained heavy metal wastewater

doi:10.16085/j.issn.1000-6613.2015.04.044

Abstract

Abstract: This research usedorganic wastewater as anode substrate,mixed bacteria in activated sludge as anode microbial inoculation,and copper-contained wastewater as catholyte. Double chamber microbial fuel cells(MFCs)were constructed. The effects of electrode on the electricity generation capacity of MFC and treatment of organic wastewater and heavy-metal wastewater containing copper simultaneously were studied. The results show that the removal rate of COD could reach 79.1% and the removal rate of Cu²⁺ of catholyte could reach 95.6%. The electricity production of MFC which using activated carbon/graphite rod as electrode is optimal and its open circuit voltage could up to 800mV,which was 1.25 times that of MFC using graphite rod as electrode,1.3 times that of MFC using activated carbon/carbon paper as electrode,1.5 times that of MFC using carbon paper as electrode. When the electrode distance of MFC was 2cm,the open circuit voltage could up to 580mV and the internal resistance was 181Ω,the power generation is optimal. When electrode surface area was 75cm²,the open circuit voltage of MFC could up to 470mV,which was 1.1 times that of 50cm² electrode surface area MFC,2.1 times that of 30cm² electrode surface area MFC. The capacity of MFC would reach its optimal performance when A_An/A_cat=0.4,the maximum open circuit voltage was 600mV,the maximum power density was 48.2mW/m².

Key words: microbial fuel cell(MFC), electrode materials, electrode distance, electrode surface area, electricity production, wastewater treatment

摘要： 实验以有机废水为阳极底物,以活性污泥中的混合菌为阳极接种微生物,以含铜废水为阴极液,构建双室MFC,探讨电极对MFC同时处理有机废水和含铜重金属废水产电性能的影响.结果表明:MFC对阳极有机废水COD的去除率最高为79.1%,对阴极液中Cu²⁺的去除率最高为95.6%.活性炭/石墨棒电极MFC产电性能最优,开路电压最高为800mV,是石墨棒电极MFC的1.25倍,是活性炭/碳纸电极MFC的1.3倍,是碳纸电极MFC的1.5倍.当电极距离为2cm时,MFC开路电压580mV,内阻为181Ω,产电性能最优.电极表面积为75cm²时,MFC的开路电压470mV,是电极表面积为50cm²的MFC的1.1倍,是电极表面积为30cm²的MFC的2.1倍.当A_An/A_cat=0.4时MFC产能最佳,MFC的开路电压最高为600mV,最大功率密度48.2mW/m².

关键词: 微生物燃料电池, 电极材料, 电极距离, 电极表面积, 产电性能, 废水处理

CLC Number:

X789

YIN Xiafei, LIU Weiping. The effects of electrode on the electricity generating capacity of microbial fuel cell in the treatment of organic wastewater and copper-contained heavy metal wastewater[J]. Chemical Industry and Engineering Progree, 2015, 34(04): 1152-1158,1170.

印霞棐, 刘维平. 电极对微生物燃料电池同时处理有机废水和含铜重金属废水产电性能的影响[J]. 化工进展, 2015, 34(04): 1152-1158,1170.

References

[1] Rinaldi A,Mecheri B,Garavaglia V,et al. Engineering materials and biology to boost performance of microbial fuel cells:A critical review[J]. Energy & Environmental Science,2008,1(4):417-429.
[2] Zeng L Z,Li W S. Research progress on the electrode materials for microbial fuel cell[J]. Chinese Battery Industry,2009,14(4):280-284.
[3] 次素琴,吴娜,温珍海,等. 微生物燃料电池电极材料研究进展[J]. 电化学,2012,18(3):243-251.
[4] An J,Kim B,Nam J,et al. Comparison in performance of sediment microbial fuel cells according to depth of embedded anode[J]. Bioresource Technology,2013,127:138-142.
[5] 刘志华,李小明,杨慧,等. 不同处理方式污泥为燃料的微生物燃料电池特性研究[J]. 中国环境科学,2012,32(3):523-528.
[6] Santoro C,Guilizzoni M,Correa Baena J P,et al. The effects of carbon electrode surface properties on bacteria attachment and start up time of microbial fuel cells[J]. Carbon,2014,67:128-139.
[7] Cai H,Wang J,Bu Y,et al. Treatment of carbon cloth anodes for improving power generation in a dual-chamber microbial fuel cell[J]. Journal of Chemical Technology & Biotechnology,2013,88(4):623-628.
[8] 罗勇,骆海萍,覃邦余,等. 盐度对MFC产电及其微生物群落的影响[J]. 中国环境科学,2013,33(5):832-837.
[9] Peng L,You S J,Wang J Y. Carbon nanotubes as electrode modifier promoting direct electron transfer from Shewanella oneidensis[J]. Biosensors and Bioelectronics,2010,25(5):1248-1251.
[10] 尹航,胡翔. 不同阳极微生物燃料电池产电性能的比较[J]. 环境工程学报,2013,7(2):608-612.
[11] 侯俊先,刘中良,张培远. 石墨烯修饰微生物燃料电池阳极的研究[J]. 工程热物理学报,2013,34(7):1319-1322
[12] Zhang Y Z,Mo G Q,Li X W. A graphene modified anode to improve the performance of microbial fuel cells[J]. Power Sources,2011,196(13):5402-5407.
[13] Xiao L,Damiena J,Luo J Y. Crumpled graphene particles for microbial fuel cell[J]. Power Sources,2012,208(196):5402-5407.
[14] 张廷涛,张礼霞,高平,等. 混合菌群生物燃料电池的产电机理与特性[J]. 应用与环境生物学报,2012,18(3):465-470.
[15] 冯雅丽,毕耜超,李浩然,等. 单室无膜空气阴极微生物燃料电池处理沼液的研究[J]. 高等化学工程学报,2013,27(5):889-895.
[16] 黄健盛,杨平,郭勇,等. 阴极液及底物浓度对AFB-MFC同步废水处理及产电性能影响[J]. 环境工程学报,2012,6(2):462-466.
[17] 赵世辉,李友明,万小芳,等. 木质素磺酸盐在微生物燃料电池中的降解及产电性能研究[J].环境工程学报,2011,5(7):1647-1650.
[18] 邢东,张永娟,李永峰. 糖蜜废水与电镀废水对微生物燃料电池产电性能的影响[J]. 中国甜菜糖业,2012,4:9-11.
[19] Rittmann B E,Hausner M,Loffler F,et al. A vista for microbial ecology and environmental biotechnology[J]. Environmental Science & Technology,2006,40(4):1096-1103.
[20] Wu C,Zhang J Q,Wang,X L,et al. Power generation of microbial fuel cell from aniline and glucose[J]. Acta Scientiae Circumstantiae,2011,31(6):1227-1232.
[21] Kalathil S,Lee J,Cho M H. Granular activated carbon based microbial fuel cell for simultaneous decolorization of real dye wastewater and electricity generation[J]. New Biotechnology,2011,29(1):32-37.
[22] Zhao F,Rahunen N,Varcoe J R,et al. Activated carboncloth as anode for sulfate removal in a microbial fuel cell[J]. Environmental Science & Technology,2008,42(13):4971-4976.
[23] Fricke K,Hamisch F,Schroder U. On the use of cyclic voltammetry for the study of anodic electron transfer in microbial fuel cell[J]. Energy & Environmental Science,2008,1:144-147.
[24] 孔晓英,孙永明,李连华,等. 阳极材料对微生物燃料电池性能影响的研究[J]. 太阳能学报,2011,32(5):746-749.
[25] 刘智敏. 微生物燃料电池电化学性能研究[D]. 哈尔滨:哈尔滨工程大学,2008.
[26] 刘莹,徐惠忠,韩京龙,等. 基质浓度·电极距离·离子强度对MFC影响的研究[J]. 环境科学与技术,2011,34(9):157-161.
[27] 王艳芳,刘百仓,郑哲,等. 电极面积和电极间距对立方体型MFCs产电能力的影响[J]. 可再生能源,2013,31(8):68-74.
[28] Cheng S,Liu H,Logan B E. Increased power generation in a continuous flow MFC with advective flow through the porous anode and reduced electrode spacing[J]. Environmental Science Technology,2006,40(7):2426-2432.