Journal of Northeastern University Natural Science ›› 2017, Vol. 38 ›› Issue (7): 1012-1016.DOI: 10.12068/j.issn.1005-3026.2017.07.021

• Resources & Civil Engineering • Previous Articles     Next Articles

Effects of Biocathode Construction Methods on Azo Dye Degradation Process

WANG You-zhao, PAN Yuan, XIE Yuan-hua, ZHU Tong   

  1. School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, China.
  • Received:2016-01-25 Revised:2016-01-25 Online:2017-07-15 Published:2017-07-07
  • Contact: ZHU Tong
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Abstract: The biocathode can enhance the azo dye decolorization process in bioelectrochemical system. Three construction methods for biocathode were analyzed. The experimental results indicated that all the biocathodes formed by those methods could accelerate the azo dye decolorization process and those reactions were mostly dynamical processes. Among those methods, the anode polarity-reversal method showed the maximum catalytic current (0.12mA) and azo dye removal efficiency (85.2%). While the other method,in which the biocathode was formed by anaerobic sludge inoculation,had the advantage in electron recovery efficiency(71.8%). By analyzing the microbial biofilm structure of biocathodes, there were large amount of microbes correlated with functions of electrochemical activity or azo dye decolorization, which indicated that the enhancing effect of biocathodes related closely to the biofilm structures.

Key words: biocathode, inoculation, azo dye, microbial community, bioelectrochemical system

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