Journal
FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
Volume 8, Issue 5, Pages 784-791Publisher
HIGHER EDUCATION PRESS
DOI: 10.1007/s11783-013-0590-4
Keywords
microbial fuel cell (MFC); algae; bioelectricity; substrate; volatile fatty acid; biomass; COD removal efficiency
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Funding
- Korea foundation for advancement of science and creativity (KOFAC-Under graduate program)
- National research foundation of Korea [2010-0003940, 2012R1A1A 2042031]
- National Research Foundation of Korea [2010-0003940] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Renewable algae biomass, Scenedesmus obliquus, was used as substrate for generating electricity in two chamber microbial fuel cells (MFCs). From polarization test, maximum power density with pretreated algal biomass was 102 mW.m(-2) (951 mW.m(-3)) at current generation of 276 mA.m(-2). The individual electrode potential as a function of current generation suggested that anodic oxidation process of algae substrate had limitation for high current generation in MFC. Total chemical oxygen demand (TCOD) reduction of 74% was obtained when initial TCOD concentration was 534 mg .L-1 for 150 h of operation. The main organic compounds of algae oriented biomass were lactate and acetate, which were mainly used for electricity generation. Other by-products such as propionate and butyrate were formed at a negligible amount. Electrochemical Impedance Spectroscopy (EIS) analysis pinpointed the charge transfer resistance (112 Omega) of anode electrode, and the exchange current density of anode electrode was 1214 nA.cm(-2).
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