Application of Thermostable Xylanases at Mashing and During Germination

For the evaluation of the intrinsic lautering performance of malt an in-house test, predictive for both lauter tun and mash filter operations, has been used. Commercial thermostable endoxylanases added during mashing differ in their ability to increase the filtration rate. Especially the addition of a family 10 endoxylanase at mashing-in can be very efficient in view of wort filtration. Family 10 endoxylanases degrade barley arabinoxylans in an effective way and are not inhibited by the Hordeum vulgare L. xylanase inhibitor (HVXI) purified from barley. Moreover, the addition of this family 10 endoxylanase during germination has a positive effect on the filtration capacity of the kilned malt because the added endoxylanase activity is only partly destroyed during kilning..

Furthermore, addition of endoxylanases during germination appears to have no effect on standard malt quality characteristics.

BrewingScience - Monatsschrift für Brauwissenschaft, 63 (November/December 2010), pp. 133-141