The effect of pressure on the specific resistance of yeast filter cakes during dead-end filtration in the range 30–500kPa

Author: McCarthy A.A.   Conroy H.   Walsh P.K.   Foley G.  

Publisher: Springer Publishing Company

ISSN: 0951-208X

Source: Biotechnology Techniques, Vol.12, Iss.12, 1998-12, pp. : 909-912

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

Previous Menu Next

Abstract

Suspensions of Kluveromyces marxianus var. marxianus NRRLy2415 and active dry bakers' yeast were dead-end filtered in the range 30–500kPa. In all cases, the specific cake resistance, α, could be related to pressure, ▵P, through the expression α = α0 (1 kc▵P) where α0 and kc are empirical constants. For K. marxianus, the values of kc were 1.67 × 10-5 Pa-1 and 2.39 × 10×5 Pa-1 for suspensions with mean cell aspect ratios of 2.98 and 7.33 respectively. Values of kcfor active dry yeast were 10.56 × 10-5 Pa-1 in the case of unwashed cells with a mean aspect ratio of 1.21 and 7.94 × 10-5 Pa-1 for washed cells with a mean aspect ratio of 1.20. ©Rapid Science Ltd. 1998