Electricity generation in a microbial fuel cell from dairy industrial wastewater using Shewanella ME-۱

Microbial fuel cell (MFC) is a new method for simultaneous wastewater treatment and electricity generation. In a microbial fuel cell, bacteria used a wide range of organic substrates to convert chemical energy into electrical energy. The aim of this study was to investigate the production of electricity by Shewanella ME-۱from whey in a two-chamber MFC with aeration and non-aeration conditions at the cathode chamber. Shewanella was inoculated into LB broth and incubated for ۲۴ hours at ۳۰ °C. Then ۱% of the fresh culture of Shewanella was inoculated into the anode chamber containing whey. The cathode chamber containing the phosphate buffer was continuously aerated ۱۰۰ mL.min-۱ but the anode chamber was kept under anaerobic condition. The MFC was incubated at ۳۰ °C for ۴۸ hours and the maximum open circuit voltage was measured. The results of electricity measurement was showed a maximum voltage,maximum power densitie , current densitie in MFC containing whey with aeration at the cathode chamber were۵۱۱.۲ mV, ۴۸.۹ mW.m-۲ ,۲۱۸.۹۹ mA.m-۲. The COD of initial and final in MFC were measured ۳۳۱۸۸ and ۲۶۸۰۸ mg.L-۱, respectively. In addition, the maximum voltage,maximum power densitie ،current densitie in anaerobic MFC containing whey were measured ۴۷۳ mV, ۱۸.۰۹ mW.m-۲ ,۱۳۳.۱۹mA.m-۲, respectively. The COD in MFC was measured ۳۳۱۸۸ and ۲۹۰۳۶ mg.L-۱, respectively. Also, the electricity generation in artificial wastewater containing ۱% glucose was investigated and the maximum voltage, maximum power densitie ,current densitie were ۴۶۱.۶mV, ۱۵.۱ mW.m-۲, ۷۳mA.m-۲. The COD in MFC was measured at ۱۷۱۸۸and ۱۴۳۷۶ mg.L-۱, respectively. The results of the current study showed that the highest electricity was generated in the aerated MFC containing whey. In addition, the lowest electricity was generated in the aerated MFC containing glucose artificial wastewater

کلیدواژه ها:

microbial fuel cell ، electricity generation ، dairy industrial wastewater ، Shewanella