Ultrafiltración de caldos de fermentación

Abstract

Tangential microfiltration and ultrafiltration were studied to concentrate Phaffia rhodozym yeast broths, yeast that is used in production of astaxantine colorant. Microfiltration and ultrafiltration cartridges were used to study the effect of the operating variables on the permeated flux. The values used were: transmembranal pressures from 35 to 210 kPa, feeding flows from 7 a 30 ×10-6 m3/s, pH from 4 to 8; and temperature from 303 to 323 K. The highest flux for microfiltration was 13 × 10-6 m/s, observing that concentration decreases when the pH increases. For ultrafiltration the maximum flux was 17 × 10-6 m/s. In both cases the maximum yeast concentration was 250 kg/m3. The results show that concentration of Phaffia rhodozym yeast broths can be done using tangential microfiltration or ultrafiltration.