I have a collection of microorganisms and I would like to know if there is any fast, easy and cheap to identify if there are any ethanol producers within those.
Well, I could imagine if you have a plate with several different colonies on it, you could spray a mix of any alcohol dehydrogenase and NAD+ on the plate, incubate it for a few minutes and look at the NADH fluorescence under UV-A. Quite experimental but may work.