Abstract
Se aplicó el campo magnético estático a la cerveza de alta gravedad en tres etapas distintas del proceso, a partir de un diseño multifactorial D-óptimo de tres factores (intensidad de corriente, tiempo de residencia y tipo de cerveza). Se determinó la turbidez variable de respuesta por la diferencia de absorbancia por espectrofotometría a 580 nm. Se obtuvo un modelo lineal en los rangos evaluados que relaciona dicha variable con el régimen de tratamiento magnético con efecto significativo sobre la aglutinación de las partículas coloidales en suspensión lo cual favorece la clarificación. La mejor combinación de factores estuvo en el rango de 0,40-0,55 A (100-120 mT) y tiempo de residencia 10 s en la cerveza no diluida y en la diluida, sin afectación de las características sensoriales.
Highlights
La turbidez constituye un defecto de calidad de la cerveza cuando es filtrada y puede deberse a la presencia de partículas en suspensión como sustancias coloidales
Static magnetic field was applied to high gravity beer in three different stages
Linear model was obtained in the ranges tested relating the absorbance to the pattern
Summary
Static magnetic field was applied to high gravity beer in three different stages of the process, from a multivariate D-optimal design for three factors (current, residence time and type of beer). The response variable turbidity, was determined by difference of absorbance at 580 nm. Linear model was obtained in the ranges tested relating the absorbance to the pattern of magnetic treatment, with significant effect on the binding of colloidal particles in suspension which favors clarification. The best combination of factors ranged from 0.40 to 0.55 A (100-120 mT) and time 10 s in non-diluted and diluted beer, without affecting the physical-chemical and sensory properties
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