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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472
EISSN: 1735-2630
Vol. 8, No. 4, 2011, pp. 781-792
Bioline Code: st11071
Full paper language: English
Document type: Research Article
Document available free of charge

International Journal of Environment Science and Technology, Vol. 8, No. 4, 2011, pp. 781-792

 en Electrogenic capabilities of gram negative and gram positive bacteria in microbial fuel cell combined with biological wastewater treatment
Juang, D.F.; Yang, P.C.; Lee, C.H.; Hsueh, S.C & Kuo, T.H.

Abstract

The voltage and the power production of two gram negative and two gram positive bacteria in four identical continuous flow microbial fuel cells combined with biological wastewater treatment units were evaluated and compared in the present study. Each microbial fuel cell and biological treatment unit was operated at four different flow rates and four different external load resistances. The results show that overall removal efficiency of chemical oxygen demand for all four systems can reach more than 85.5%. Each pure culture has different power generation performance that can be affected by some factors, such as wastewater characteristics, influent flow rate and hydraulic retention time of reactor. Good linear relationships between the flow rate and the potential and between the flow rate and the power density on four pure cultures at different external load resistances were found. Comamonas testosteroni check for this species in other resources has better power generation performance than Arthrobacter polychromogenes check for this species in other resources , especially at higher flow rate. Although Pseudomonas putida check for this species in other resources also showed higher power generation than Corynebacterium glutamicum check for this species in other resources , the difference was not statistically significant. It seems that gram negative bacteria could display higher power generation than gram positive bacteria at higher flow rate. However, more evidence is required to provide stronger proof for the difference of power generation between gram negative and gram positive bacteria.

Keywords
Anode; Cathode; Electron; Power generation; Proton

 
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