Tuesday, 3 October 2017: 10:20
National Harbor 10 (Gaylord National Resort and Convention Center)
In this study, a microbial fuel cell was used to treat acid mine drainage (AMD) from anabandoned coal mine in the cathode chamber under aerobic condition. Activated sludge from a local wastewater treatment plant was used in the anode chamber of the BES to supply electrons to the treatment. After 7 days, the pH of the cathode solution enhanced from 2.5 to 7.3. More than 99% of Al, Feand Pb were removed, and removal rates of 93%, 91%, 89% and 69% were achieved for Cd, Zn, Mn and Corespectively with biocathode. Energy-dispersive X-ray spectroscopy (EDS) study revealed the depositionof the various types of metals on the cathode surface, and some metals were detected in the precipitatesof the cathode chamber. The bacteria for AMD treatment was identified to be Serratia spp. using 16s rRNAgene amplification and sequencing. Scanning electron microscopy showed attached growth of the bacteria on the cathode. The bioelectrochemical treatment of the AMD was also compared with the biological treatment in a continuously stirred batch reactor (CSBR). Around 30~50 mV of the closed circuit voltage was obtained for different cases in this study.