A Novel Stabilization of Beer with Polyclar® Brewbrite™

Mustafa Rehmanji, Chandra Gopal, and Andrew Mola. International Specialty Products, Wayne, NJ. Based on a poster selected for presentation at the MBAA Guadalahara Convention, November 2001.

Abstract
A procedure for stabilizing beer in the brewhouse using a proprietary composite of micronized polyvinylpolypyrrolidone and a selected carrageenan is described. The product, Polyclar( Brewbrite(, was added 10 min before the end of the kettle boil and significantly reduced the level of the haze-active tannoid (polyphenol) fraction. Additionally, its use allowed for increased precipitation of trub (spent hops, precipitated protein, and other insoluble material) and a brighter wort ex-paraflow. Wort yield showed an improvement of up to 3% compared to the yield of an untreated control. Beer treated with Polyclar Brewbrite also gave about a 10% reduction in the fermentation time as compared to the untreated wort. Both multiplication and fermentation rates of yeast were improved in the Brewbrite-treated wort. Pilot-scale and commercial trials confirmed that Polyclar Brewbrite provided enhanced beer stability, coupled with improved productivity.
Keywords: beer stabilization, brewhouse treatment of wort, fermentation time, shelf life, wort clarity, wort yield  

Sintesis
Se describe un procedimiento para estabilizar la cerveza utilizando un compuesto propietario de polivinilpolipirrolidona micronizada y una carraginina; estos compuestos son agregados en la sala de cocimiento. El producto (Polyclar( Brewbrite() se agreg� 10 min. antes del final del hervor, con una reducci�n significativa en el nivel de la fracci�n del tanoido (polifenol) activamente responsable de la turbieza en fr�o. Su uso tambi�n permiti� una mayor precipitaci�n del trub (residuos de l�pulo, prote�na precipitada, y otro material insoluble) y un mosto m�s brillante a la salida del enfriador. El rendimiento del mosto present� una mejora de hasta 3% comparado con el rendimiento de un mosto de control. Cerveza tratada con Polyclar Brewbrite dio una reducci�n de 10% en el tiempo de fermentaci�n comparado con un mosto de control. Se mejor� tanto la tasa de reproducci�n como la velocidad de fermentaci�n de la levadura en el mosto tratado con Brewbrite. Los ensayos, tanto en planta piloto como en escala industrial, confirmaron que el Polyclar Brewbrite proporcion� una mejor�a significativa en la estabilidad de la cerveza, a la vez de mejorar la productividad.