| 内容提要: |
Microbial
electrolysis cells (MECs) had a potential to improve antibiotics removal from
wastewater. However, research on antibiotics removal from concentrated sludge
using MECs was still very limited. In this study, antibiotics removal and
microbial responses in MECs treating concentrated sludge under different applied
voltages (0.3 V-1.5 V) were investigated. Results showed that antibiotics removal
efficiencies at 0.6 V and 1.0 V were 16.7%-26.6% higher than other applied
voltages. The applied voltages had no obvious effects on the viability,
activity and composition of microorganisms in the suspended sludge even up to
1.5 V. Bioelectrodes exhibited higher bioelectrocatalytic activity and denser
microbial aggregation at 0.6 V and 1.0 V, under which higher antibiotics
removal was also achieved. The enhanced removal of antibiotics at the optimal
applied voltages was mainly contributed by the bioaugmentation of electrodes,
but was irrelative with the electrochemical reaction and the microbial
responses in suspended sludge. |