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

Yifeng Zhang | Zendy; Booki Min | Zendy; Liping Huang | Zendy; Irini Angelidaki | Zendy

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

Author(s) -

Yifeng Zhang,

Booki Min,

Liping Huang,

Irini Angelidaki

Publication year - 2009

Publication title -

applied and environmental microbiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.552

H-Index - 324

eISSN - 1070-6291

pISSN - 0099-2240

DOI - 10.1128/aem.02240-08

Subject(s) - microbial fuel cell , hydrolysate , chemical oxygen demand , microbial consortium , straw , biomass (ecology) , microbial population biology , deltaproteobacteria , food science , alphaproteobacteria , gammaproteobacteria , pulp and paper industry , bioenergy , electricity generation , bacteria , biology , chemistry , wastewater , biofuel , environmental science , microbiology and biotechnology , environmental engineering , microorganism , ecology , agronomy , biochemistry , hydrolysis , engineering , 16s ribosomal rna , genetics , power (physics) , quantum mechanics , physics

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. The power density reached 123 mW/m(2) with an initial hydrolysate concentration of 1,000 mg chemical oxygen demand (COD)/liter, while coulombic efficiencies ranged from 37.1 to 15.5%, corresponding to the initial hydrolysate concentrations of 250 to 2,000 mg COD/liter. The suspended bacteria found were different from the bacteria immobilized in the biofilm, and they played different roles in electricity generation from the hydrolysate. The bacteria in the biofilm were consortia with sequences similar to those of Bacteroidetes (40% of sequences), Alphaproteobacteria (20%), Bacillus (20%), Deltaproteobacteria (10%), and Gammaproteobacteria (10%), while the suspended consortia were predominately Bacillus (22.2%). The results of this study can contribute to improving understanding of and optimizing electricity generation in microbial fuel cells.

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