CSS�A New Beer Stabilization Process

Axel Jany (1) and M. Katzke (2). 1. Handtmann Filtration, Biberach, Germany. 2. Amersham Biosciences, Freiburg, Germany.

Abstract
The combined stabilization system (CSS) is capable of removing turbidity-forming protein and polyphenols in a single step. The CSS is a compact, skid-mounted, fully automated stabilization system consisting of a stabilization chamber, regeneration unit, and cleaning unit. The CSS stabilization chamber is completely filled with the CSS adsorbent, which is based on a high-grade, cross-linked, insoluble agarose with a particle size of 100-300 �. The adsorbent is permanently retained, making the dosing of precoat and feed suspension prior to each filtration unnecessary. The basic principle of CSS is that haze precursors of a protein and polyphenolic nature are adsorbed within seconds and then removed from the agarose during the regeneration with rock salt solution and caustic soda.
Keywords: adsorber, beer stabilization, combined protein, CSS, polyphenol stabilization  

Sintesis
El sistema de estabilizaci�n combinada (SEC) es capaz de eliminar prote�nas formadores de turbieza y polifenoles en un s�lo paso. El SEC es un sistema de estabilizaci�n autom�tico compacto montado sobre patines; consiste de una c�mara de estabilizaci�n, una unidad de regeneraci�n y una unidad de limpieza. La c�mara de estabilizaci�n del SEC esta completamente lleno con el adsorbente SEC; este se compone de una agarosa insoluble de enlaces cruzados de alta pureza con un tama�o de part�cula de 100-300 �. El adsorbente es retenido de manera permanente, lo que hace innecesario el paso de precapa y de alimentaci�n previo a la corrida de filtraci�n. El principio fundamental del SEC es la adsorci�n casi instant�nea de los precursores de naturaleza proteica y polifen�lica; estos son removidos de la agarosa durante la regeneraci�n con sal piedra y sosa c�ustica.