TY - JOUR
T1 - Electricity generation from fermented primary sludge using single-chamber air-cathode microbial fuel cells
AU - Yang, Fei
AU - Ren, Lijiao
AU - Pu, Yuepu
AU - Logan, Bruce E.
N1 - Funding Information:
We thank Fang Zhang and Yong Luo for advice on MFC configurations, and David Jones and Xiuping Zhu for their help on VFAs measurements. This work was supported by Award KUS-I1-003-13 from the King Abdullah University of Science and Technology (KAUST) , and Jiangsu Province Graduate Innovation Project ( CX10B-087Z ).
PY - 2013/1
Y1 - 2013/1
N2 - Single-chamber air-cathode microbial fuel cells (MFCs) were used to generate electricity from fermented primary sludge. Fermentation (30°C, 9days) decreased total suspended solids (26.1-16.5g/L), volatile suspended solids (24.1-15.3g/L) and pH (5.7-4.5), and increased conductivity (2.4-4.7mS/cm), soluble COD (2.66-15.5g/L), and volatile fatty acids (1.9-10.1g/L). To lower the COD and increase pH, fermentation supernatant was diluted with primary effluent before being used in the MFCs. The maximum power density was 0.32±0.01W/m2, compared to 0.24±0.03W/m2 with only primary effluent. Power densities were higher with phosphate buffer added to the supernatant (1.03±0.06W/m2) or the solution (0.87±0.05W/m2). Coulombic efficiencies ranged from 18% to 57%, and sCOD removals from 84% to 94%. These results demonstrated that sludge can effectively be used for power generation when fermented and then diluted with only primary effluent.
AB - Single-chamber air-cathode microbial fuel cells (MFCs) were used to generate electricity from fermented primary sludge. Fermentation (30°C, 9days) decreased total suspended solids (26.1-16.5g/L), volatile suspended solids (24.1-15.3g/L) and pH (5.7-4.5), and increased conductivity (2.4-4.7mS/cm), soluble COD (2.66-15.5g/L), and volatile fatty acids (1.9-10.1g/L). To lower the COD and increase pH, fermentation supernatant was diluted with primary effluent before being used in the MFCs. The maximum power density was 0.32±0.01W/m2, compared to 0.24±0.03W/m2 with only primary effluent. Power densities were higher with phosphate buffer added to the supernatant (1.03±0.06W/m2) or the solution (0.87±0.05W/m2). Coulombic efficiencies ranged from 18% to 57%, and sCOD removals from 84% to 94%. These results demonstrated that sludge can effectively be used for power generation when fermented and then diluted with only primary effluent.
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U2 - 10.1016/j.biortech.2012.10.021
DO - 10.1016/j.biortech.2012.10.021
M3 - Article
C2 - 23186679
AN - SCOPUS:84873198467
SN - 0960-8524
VL - 128
SP - 784
EP - 787
JO - Bioresource technology
JF - Bioresource technology
ER -
