Ask Mr. Wizard Blueberry Additions and Fruit Haze Q I recently made a blueberry Weizen. After a bit of research, we decided to add the blueberries to the secondary fermenter. We defrosted them, ran them through a blender, then poured the crushed berries into the secondary. The resulting brew is nicely bluish-purple, tastes nicely of the blueberries, and is a very refreshing beer. I like it a lot. The issue is that the beer is very cloudy, millions of tiny particles of blueberries in the liquid, in spite of draining the berries through a muslin bag to get out the solids. I suspect the particles I see are too tiny to be caught in the bag. We added Irish moss during the boil, but wonder if there's something we should do next time for a clearer result. A I think the problem with this beer is that you placed your blueberries into a blender. By doing this you broke down insoluble compounds in the blueberry skins into millions of tiny bits that have a density not much greater than beer. The result is fairly stable, hazy emulsion that is difficult to filter and not effectively removed by straining or fining (Irish moss helps with wort clarity in the kettle, but has no effect on ingredients added after the boil). Read More |
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