Basic Electricity-producing Characteristics of Microbial Fuel Cell Using Supernatant Fluid of Heat Pretreated Sludge
SONG Tian-shun WU Xia-yuan FAN Ping ZHOU Chu-xin
National Engineering Research Centre for Biochemistry, Nanjing University of Technology Biotechnology and Pharmaceutical Engineering, Institute of Joint Bioenergy, Nanjing University of Technology Biotechnology and Pharmaceutical Engineering, Institute of Joint Bioenergy, Nanjing University of Technology Biotechnology and Pharmaceutical Engineering, Institute of Joint Bioenergy, Nanjing University of Technology
Abstract： Using a single-chamber air cathode microbial fuel cell (MFC) as experimental reactor, its electricity generation using sludge supernatant fluid with heat pretreatment was studied. The results showed that its maximum power density (Pmax) of MFC was highest (44.4 mW/m2), when it was heated for 3 h at 90℃, which was 105 times that of MFC without heat pretreatment. Absorbance of UV254 and A250/A365 manifested that the substrate composition of supernatant fluid was most conducive to anodic microbial metabolism in electricity. Pmax of MFC was only 5.8 mW/m2, when MFC used the sludge heat pretreated again as substrate. These results evidently demonstrated the advantages of heating pretreatment to sludge for enhancing MFC power and combing with existing process easily, it was close to actual application.
2012, Vol. 12 
