Corresponding Author

HUANG Xia(xhuang@tsinghua.edu.cn)


Hydrolyzed sludge liquor was used as the substrate of microbial fuel cell. When the thermal treatment time increased from 2 h to 96 h, pH varied little between 7.4 and 8.0. When the treatment time increased, the conductivity, COD and alkaline condition increased to 2.53 mS·cm-1, 2520 mg·L-1 and 800 mg·L-1, respectively. Meanwhile, the power density increased to 25 W·m-3. The COD removal increased firstly, then decreased, and finally reached the maximum of 47% at the hydrolyzed time of 6 h. The maximal coulombic efficiency was 71% when the treatment time was 4 h. The transports of cations, including ammonium, sodium, calcium and magnesium ions, from anode chamber to cathode chamber would cause the decreases of pH in anode chamber, among which the ammonium mobility affected the most.

Graphical Abstract


wastewater treatment, microbial fuel cell, sewage sludge

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