ORIGINAL RESEARCH
Molasses Wastewater Treatment by Microbial Fuel Cell with MnO2-Modified Cathode
Li-ping Fan1, Dan-dan Xu2,3, Chong Li1,4, Song Xue2
 
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1Shenyang University of Chemical Technology, College of Information Engineering, Shenyang, China
2Shenyang University of Chemical Technology, College of Environment and Safety Engineering, Shenyang, China
3Liaoning ERay Environmental Technology Engineering Co. Ltd, Fushun, China
4University of Chemical Technology and Metallurgy, Sofia, Bulgaria
Publish date: 2016-11-24
Submission date: 2016-05-10
Final revision date: 2016-07-12
Acceptance date: 2016-07-13
 
Pol. J. Environ. Stud. 2016;25(6):2359–2356
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ABSTRACT
An experimental system consisting of a dual chamber microbial fuel cell was constructed using simulated molasses wastewater as the inoculum and anode substrate, carbon cloth or carbon felt as the cathode base, and MnO2 as the oxygen reduction catalyst for cathode. By testing and analyzing the output voltage, power density, and COD removal rate of the microbial fuel cell, the effects of the MnO2-modified cathode on power generation and wastewater treatment of microbial fuel cells were studied. The steady output power density of the microbial fuel cell with carbon cloth cathode were 6.8 and 10.33 mW/m2, respectively, before and after modification by MnO2, that is, the power density of the microbial fuel cell with MnO2-modified carbon cloth was increased by 51.91% more than that of unmodified carbon cloth. The stable output power density of the microbial fuel cells with carbon felt were 3.6 and 31.37 mW/m2, respectively, before and after modification by MnO2, that is, the power density of the microbial fuel cell with MnO2-modified carbon felt was increased by 771.4% more than that of unmodified carbon felt. The results show that the electricity generation capacity and the wastewater treatment effect of the microbial fuel cell using molasses wastewater as the anode substrate can be improved significantly by using inexpensive MnO2 as the cathode modifier.
eISSN:2083-5906
ISSN:1230-1485