Left: non-squeezed | Right: squeezed | RESULTS |Ĭheers to The Brew Hut for hosting an awesome Big Brew Day where most of the data for this xBmt was collected!Ī total of 27 people of varying levels of experience participated in this xBmt. In keeping with my commitment to develop my ideal English Bitter this year, I made some minor adjustments to a prior recipe I enjoyed, tweaking the absorption rates for each batch in BeerSmith to ensure both achieved the same pre-boil volume. To evaluate the differences between two beers made using the BIAB method where one was squeezed post-mash while the other was allowed to drain. With numerous successful BIAB batches under my belt where the bag was left untouched, most achieving adequate efficiency, it was time to see for myself what the impact of squeezing really is! | PURPOSE | On the other side of aisle, opponents of the practice claim squeezing the bag increases the risk for extracting tannins that could lead to undesirable astringency in the finished beer.
#Grain absorption beersmith full
Initially, the thought of squeezing a full bag of sopping grains suspended over my kettle wasn’t very appealing to me, largely because I prefer cleanliness and precision when brewing, and bag squeezing seemed like a good way to make a mess while simultaneously being less than predictable.Īs I dug deeper into the methods, I learned one of the more common reasons advocated for squeezing the bag is that it improves efficiency by extracting more sweet wort from the grains. In fact, BeerSmith’s standard sparge and BIAB methods have grain absorption rates set to 0.96 and 0.586 fluid ounces per ounce of grain, respectively, as it assumes some squeezing when utilizing the BIAB method. I recently switched from the batch sparge brewing method where I used a converted cooler MLT with a stainless braided hose to an electric Brew In A Bag (eBIAB) setup, which caused me for the first time to consider a curiously oft debated issue– whether or not squeezing the grain bag following the mash impacted the quality of the finished beer. Mosaic Of Change IPA by House Of Pendragon.
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