Effects of Applied Anode Potential on SRB-MFC Performances
Date Issued
2012
Date
2012
Author(s)
Chou, Tzu-Yang
Abstract
In this experiment, dual chamber MFCs inoculated with SRB mixed culture were fed with artificial wastewater containing lactate and sulfate. Different anode potentials were applied on each MFC reactor to investigate the effect of anode potential on MFC electrochemical properties as well as the microbial community of Anode respiring bacteria (ARB).
Three different anode potential (-0.3V, +0.3V and none) were applied on MFC reactors. The results indicated that the use of a negative anode potential was far superior to a positive one for enhancing SRB-MFC performance. In the SRB-MFC start up experiments, negative anode potential accelerated the start-up time to 4 days leading to an increase of 600% in MFC power density from Day 1 to Day 7. Also, it had improved COD removal efficiency to 93.75% and maintained a low sulfide accumulation, 7 ppm, over the operating period. In the SRB-MFC mature biofilm experiments, negative anode potential led to the higher current production from SRB-MFC, 0.2 V, higher power density, 80 mW/m2 and higher microbial activity in the form of increased polarization resistance, from 30 kΩ to 90 kΩ over the operating period. Finally, the effect of applied anode potential on dual anode MFC design was studied. It was found that the applied anode potential not only exert its influence on its target but also on its targets’ proximity, suggested by the DGGE results.
Subjects
Microbial FUel Cell
Sulfate Reducing Bacteria
Anode Potential
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-101-R99524094-1.pdf
Size
23.54 KB
Format
Adobe PDF
Checksum
(MD5):6855de6f7e8eefbfaefc1dad3b69d565