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secondary fermentation

secondary fermentationA second stage of fermenting an ale in a different vessel after it has undergone primary fermentation in a main fermentor. One result of secondary fermentation is a clearer beer (by removing beer from its primary fermentor, a brewer removes the yeast sediment that settles at the bottom; even more sediment collects in the secondary fermentor, further clarifying the beer.) Also, a second stage of fermenting beer already in bottles or casks, done by adding additional yeast or priming.

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