Journal of Microbial & Biochemical Technology

Decomposition of azo dyes in waste water and its power generation using air cathode microbial fuel cell

International Conference and Expo on Water Microbiology & Novel Technologies

July 18-19, 2016 Chicago, USA

Chi-Wen Lin

National Yunlin University of Science and Technology, Taiwan

Posters & Accepted Abstracts: J Microb Biochem Technol

Abstract:

The objective of this research is to develop an air biocathode microbial fuel cell (AB-MFC), with cultures of laccase producing white rot fungi Ganoderma lucidum (BCRC 36123) planted at the cathode. The developed AB-MFC was then applied to investigate the enhancement of the decomposition of azo dyes in waste water as well as its power generation. Results of the study showed: Ganoderma lucidum could utilize AO7 as a source of carbon to release laccase. AO7 concentration being 50 mg/L could be decolorized by 77% in 19 days and the laccase activity reached a maximum of 20.3±0.2 U/L. The system of planting Ganoderma lucidum at the cathode to release active laccase by repeatedly adding 180 mg/L AO7 as the sole source of carbon was capable of achieving a maximum opencircuit voltage of 821 mV, maximum closed-circuit voltage of 394 mV (external resistance of 1000 Ω), maximum power density of 13.38 mW/m2, maximum current density of 33 mA/m2 and highest decolorization of 82%, all of which were superior to the air cathode system or the white-rot fungi system with inactive laccase. Changes to voltage potential at the cathode of the AB-MFC system monitored using cyclic voltammetry scanning by a potentiostat revealed that planting laccase releasing Ganoderma lucidum at the cathode allowed the anode to receive electrons generated through microbial decomposition.

Biography :

Email: linwen@yuntech.edu.tw