Normally malt crushing can be used by dry method or wet method, but it have certain apply range.
Malt crushing by dry method is one traditional way, which have simple configuration and easy operating. It is widely use malt crushing method in middle or small microbrewery.
In this condition, we also sprinkling some water on the surface of malt for preimpregnation to reach good crushing effect.
However in most industrial brewery, malt crushing by wet method is normally used, and wet crushing miller cost also is relatively high. In this situaton, the malt need soak in the hot water about 15-20 minutes, which can make malt water content reach to 30% and malt tenacity also increase, thus malt husk can keep complete. Also the spent grain in loosen situation and speeding lauter process, as well as reduce harmful components leach, no dust.
However , there have some limitations or cons for example crushing time need to control within 30 minutes, higher electric consumption with bigger power, cleaning every time after use with higher labor intensity, further the crushed malt can not storage etc.
Besides dry crushing method have higher saccharify yield than wet crushing method about 2%. Also wet crushing method will leave 2%-3% sugar in the spent grain.
Edited by Derrick
Sales Manager in Tiantai Company
Email:brewery@cnbrewery.com
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