Sauerkraut juice powers plant in France
7 February 2013 Last updated at 17:26 GMT
Producers of sauerkraut, or choucroute as it is known in French, have turned to utilizing the fermented cabbage juice to produce bio-gas.
The acidic juice formerly treated as waste due for disposal, now powers a local water treatment plant, with the excess energy sold back into the grid.
Elise Wicker reports.