Microbial fuel cell (MFC) has emerged as a promising technology
for energy recovery by microorganisms, and has been a subject
of intensive research over the past decade (Logan, 2009; Lovley,
2008; Rittmann, 2008). Although exciting progress has been
achieved recently in the MFC power density, significant barriers
are still remaining and they limit its practical applications, such
as low electron recovery rate, unstable system performance and
high costs (Kim et al., 2007). Tremendous efforts have been made
to improve the MFC performance with technical and engineering
approaches, among which optimization of separator is of a great
importance and has attracted considerable interests in recent years