Generation of Electricity and Analysis of Microbial Communities in Wheat Straw Biomass-Powered Microbial Fuel Cells

Yifeng Zhang, Booki Min, L. Huang, Irini Angelidaki

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Electricity generation from wheat straw hydrolysate and the microbial ecology of electricity producing microbial communities developed in two chamber microbial fuel cells (MFCs) were investigated. Power density reached 123 mW/m2 with an initial hydrolysate concentration of 1000 mg-COD/L while Coulombic efficiencies (CEs) ranged from 37.1 to 15.5% corresponding to the initial hydrolysate concentrations from 250 to 2000 mg-COD/L. The suspended bacteria found were different from the bacteria immobilized in the biofilm, and they played different roles in electricity generation from hydrolysate. Bacteria in the biofilm were consortia with sequences similar to Bacteroidetes (40% of sequences), Alphaproteobacteria (20%), Bacilli (20%), Deltaproteobacteria (10%), and Gammaproteobacteria (10%), while suspended consortia were predominated by Bacilli (22.2%). Results from this study can contribute to improve understanding and optimizing the electricity generation in microbial fuel cells.
Original languageEnglish
JournalApplied and Environmental Microbiology
Volume75
Issue number11
Pages (from-to)3389-3395
ISSN0099-2240
DOIs
Publication statusPublished - 2009

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