http://www.google.com/search?sourceid=chrome&ie=UTF-8&q=electron+generated+from+BOD+in+an+MFC+and+convert+them+into+electric+current

https://www.sciencedirect.com/search?qs=electron%20generated%20from%20BOD%20in%20an%20MFC%20and%20convert%20them%20into%20electric%20current&show=25&sortBy=relevance

you just need to introduce a load(resistance) in the circuit and measure the current across it by a multimeter.

https://www.sciencedirect.com/search?qs=electron%20generated%20from%20BOD%20in%20an%20MFC%20and%20convert%20them%20into%20electric%20current&show=25&sortBy=relevance

Dear Akram, Talekar, and Irani,

Thank you for your valuable answers.

VH Cong

Some practical advices.

1) If you know BOD you can calculate how many electrons were transferred to O2, then.

2) Then, you can consider that the same amount electrons would be released in MFC ...