Abstract：
:Exoelectrogenic microorganisms in microbial fuel cells (MFCs) compete with other microorganisms for substrate. In order to understand how this affects removal rates, current generation, and coulombic efficiencies (CEs), substrate removal rates were compared in MFCs fed a single, readily biodegradable compound (acetate) or domestic wastewater (WW). Removal rates based on initial test conditions fit first-order kinetics, but rate constants varied with circuit resistance. With filtered WW (100Ω), the rate constant was 0.18h(-)(1), which was higher than acetate or filtered WW with an open circuit (0.10h(-)(1)), but CEs were much lower (15-24%) than acetate. With raw WW (100Ω), COD removal proceeded in two stages: a fast removal stage with high current production, followed by a slower removal with little current. While using MFCs increased COD removal rate due to current generation, secondary processes will be needed to reduce COD to levels suitable for discharge.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Zhang X,He W,Ren L,Stager J,Evans PJ,Logan BEdoi
10.1016/j.biortech.2014.11.001subject
Has Abstractpub_date
2015-01-01 00:00:00pages
23-31eissn
0960-8524issn
1873-2976pii
S0960-8524(14)01602-2journal_volume
176pub_type
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