Indexed by:期刊论文

Date of Publication:2010-10-01

Journal:BIOPROCESS AND BIOSYSTEMS ENGINEERING

Included Journals:SCIE、EI、PubMed、Scopus

Volume:33

Issue:8

Page Number:937-945

ISSN No.:1615-7591

Key Words:Microbial fuel cells; Biocathode; Cr (VI) reduction rate; Power production

Abstract:Enhancement of Cr (VI) reduction rate and power production from biocathode microbial fuel cells (MFCs) was achieved using indigenous bacteria from Cr (VI)-contaminated site as inoculum and MFC architecture with a relatively large cathode-specific surface area of 340-900 m(2) m(-3). A specific Cr (VI) reduction rate of 2.4 +/- A 0.2 mg g(-1)VSS h(-1) and a power production of 2.4 +/- A 0.1 W m(-3) at a current density of 6.9 A m(-3) were simultaneously achieved at an initial Cr (VI) concentration of 39.2 mg L(-1). Initial Cr (VI) concentration and solution conductivity affected Cr (VI) reduction rate, power production and coulombic efficiency. These findings demonstrate the importance of inoculation and MFC architecture in the enhancement of Cr (VI) reduction rate and power production. This study is a beneficial attempt to improve the efficiency of biocathode MFCs and provide a good candidate of bioremediation process for Cr (VI)-contaminated sites.