CIESC Journal ›› 2018, Vol. 69 ›› Issue (5): 2242-2249.doi: 10.11949/j.issn.0438-1157.20171073

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Analysis of synergistic effects of process factors on energy distribution in MFCs

CHENG Ben'ai1,2, JIA Hui1,2, YANG Guang3, LIU Wenbin1,2, ZHANG Hongwei1,2,3, WANG Jie1,2   

  1. 1. State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, China;
    2. School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China;
    3. School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
  • Received:2017-08-09 Revised:2017-09-19 Online:2018-05-05 Published:2017-10-16
  • Supported by:

    supported by the National Natural Science Foundation General Projects of China (51578375, 51378349).

Abstract:

Microbial fuel cell (MFC) is a novel energy conversion device which is able to convert chemical energy into electrical energy. In MFCs, organic matter was degraded in ways of microbial metabolism and bioelectricity conversion. According to the different allocation requirements of energy in the process of operation, the energy flow could be controlled by changing the operation parameters. In this study, MFCs factors, such as pH, organic load, dissolved oxygen, electrical conductance and external resistance, were applied by orthogonal design experiments to optimize parameters for regulation of energy flow. The results showed that the highest efficiency of electric energy conversion was 8.74% and the loads and resistances were significant factors. On the other hand, the highest efficiency of biological metabolism was 66.03% and the load and pH were significant factors. Therefore, when the system was under the same load condition, if the MFC were used as an electrical conversion units, the external resistances should be controlled, while if organic matter conversion capacity was required to be improved, the pH should be controlled.

Key words: microbial fuel cell, organic compounds, process control, degradation, energy distribution, process factors

CLC Number: 

  • X703.1

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