A comment from Simon on my Easy Vinegar post sent me to Rancho Gordo a terrific blog by bean maven Steven Sando.
Steven is attempting to make pineapple vinegar by fermenting a pineapple in a jar of water.
Steven's pineapple vinegar experiment should work. But first the pineapple is going to have to ferment into wine before the acetic acid producing bacteria can do it's work. I'm also wondering if there is going to be enough bacteria already present in his set up to get the job done. The air is pretty dry where he lives and one cannot presume there is going to be a lot of microorganisms floating around...
Rancho Gordo: Experiments from my mostly New World kitchen and gardens: Pineapple Vinegar