MBAA Home

Pilot Scale Investigation of the Importance of the Barley Husk for Mash filtration

Peer Reviewed Submission

MBAA TQ vol. 36, Number 4, 1999, Pages 375-382 VIEW ARTICLE

Evan Evans, A.Vilpola' D.C. Stewart, K. Stenholm S. Phyri J.M. Washington A.R. Barr S. Home. Dept of Plant Science, Waite Campus, University of Adelaide, Australia; (2) VTT Biotechnology and Food Research, Finland.

Abstract
The importance of the barley husk for mash filter performance (MFP) was investigated with pilot scale Meura 2001 mash filter using grist formulations containing 0, 20, 50 and 100 % of natural malt husk content. The malt material for the grist formulations were obtained by stone dehusking high quality well modified malt into "husk" and "endosperm" fractions. These trials demonstrated that husk particles in the hammer milled grist used for mash filtration act as filter aids to improve MFP. Husk removal increased brewhouse yield by 6.7%. While no difficulties were encountered in pilot mash filter operation, a decrease was observed in MFP with reducing grist husk content. This was in contrast to a previous trial where poorly modified hulless barley malt was observed to have very poor MFP (Evans et al., MBAA Tech. Quart. 35:189-195, 1998). In addition, we previously observed that a positive correlation between filtration time and sparge Pt number was uncoupled at low grist husk contents, suggesting that husk particles may have more than one role in influencing MFP. We suggest that well modified hulless malt will have adequate MFP and would have some distinct advantages in commercial scale brewing.
Keywords: silica gel  

Sintesis
La importancia de la cascara de cevada para el rendimiento del filtro de mosto (MFP) fue investigado en pruebas de escala en un filtro de mosto Meura 2001 utilizando formulaciones de grano que contenian 0, 20, 50 y 100% de contenido natural de cascara en la malta. El material de malta para las formulaciones se obtuvo al descascarar malta de alta calidad, bien modificada, en fracciones de "cascara" y "eridosperma". Estas prubas demonstraron que las particulas de cascara en los granos molidos en piedra usados para la filtracion del mosto actuan como filtro ayudas para mejorar el MFP. A pesar de que la remocion de cascara redujo el MFP, no se encontraron dificultades con la operacion en escala piloto del filtro de mosto y el rendimiento del brewhouse se increment� por hasta 6.7 puntos porcentuales. Esto fue en contraste a unas pruebas previas en las cuales una malta de cebada pobremente modificada y sin cascara fue observada de tener un rendimiento muy malo de MFP (Evans et al., MBAA Quart. 35: 189-195, 1998). Nosotros sugerimos que una malta bien modificada sin cascara tendra un rendimiento en el filtro de mosto adecuado y puede tener algunas ventajas distintivas en el proceso cervecero.

HOME | CONTACT | JOIN/RENEW | ADVERTISE | STORE

© Copyright Master Brewers Association of Americas