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Un-aerated steeping Part 1

Ok, mind blown, and I don’t know how I’ve missed this key piece of information. Sometimes I feel like the world of malting is shrouded in so much mystery that you have to be a detective to figure it out. The data in the Scotch Bigg Report provided the biggest piece of the puzzle that was missing for me: that long germination times are only possible with un-aerated steeps. The report gives us actual recorded steep times, which are shockingly long 40-118 hours. What may be even more important was the observation in the report that some maltsters only changed their steep water once or twice and some not at all. But how is this possible? Most texts I’ve read state that the grain will die if submerged for over 24 hours, I’ve told people this myself (my apologies). In fact, I believe it’s only been in the last 150 years that aeration has been used in the steeping process – but I’ll have to do some further investigating to confirm this. In part one of this project, I do a side by side comparison of malt steeped with air rests and malt steeped for 72 hours without. Results in a nutshell: the un-aerated tastes better, but I haven’t brewed with them yet, that’s part two. One factor that may skew the comparison is that I malted these barley samples at the same temperature, which was lower than I would normally malt aerated barley – this may have affected the flavour of the aerated malt. This will be addressed in part three – how does historically malted barley compare with modern malt (malted at warmer temperatures – 15C, 59F)

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Posted by on February 12, 2017 in History, un-aerated malt

 

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