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Some of my other vintner buddies have been telling me that for my next press, I should go with a membrane press because they're fully enclosed and so allow for anaerobic pressing of the grapes, improving the quality. Any truth to this?


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Kinnek Knowledge Team

Your friends are correct that a fully enclosed press allows for anaerobic pressing of the grapes.  With this reduced risk of oxidation, quality is improved.  Keep in mind, however, that there are several alternatives to a membrane press, which itself may not be fully enclosed (and thus may not allow for anaerobic pressing).  

Examples of presses that satisfy the anaerobic pressing requirement are:
     - Closed bladder presses
     - Closed membrane presses
     - Continuous tank presses

So while your friends are correct about anaerobic pressing in a fully enclosed system, you do not necessarily need to choose a membrane press to benefit.  Consider all your options before your next purchase.  Good luck!

Apr 9, 2014

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