Making ethanol from what's left after fruit juice production

The juice industry leaves a lot of waste. What remains from the extraction process now might have a potential use: it can be fermented to produce ethanol which can be added to gasoline. This week, the Junta de AndalucĂ­a (Spain) has announced a project which aims to improve the fermentation process or this waste to make it cost effective for ethanol production.
This isn't a new thing, actually, a type of wine spirit (called orujo) was traditionally being made by fermenting naturally and distilating afterwards the remaining pellets from the wine-making process. (Note: this procedure is now forbidden because one important byproduct that is present in this process is methanol, which is very toxic for human consumption).

[Source: Junta de AndalucĂ­a]

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