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This article examines the separation of lysozyme from chicken egg white by ultrafiltration with 25 kDa and 50 kDa MWCO polysulfone membranes. The effects of pH, system hydrodynamics, feed concentration, and transmembrane pressure on permeate flux, lysozyme transmission, purification factor, and productivity have been discussed. With both types of membranes, higher permeate flux and lysozyme transmission were observed at higher pH. Higher lysozyme purity was generally obtained with the 25 kDa MWCO membrane. Purity of lysozyme decreased when the feed concentration was increased. With the 50 kDa MWCO membrane permeate flux, productivity and the purity of lysozyme were found to increase with increase in transmembrane pressure. The possibility of using a two-step ultrafiltration process for achieving high productivity along with high purity of lysozyme was also investigated.

Original publication

DOI

10.1002/(sici)1097-0290(20000420)68:2<191::aid-bit8>3.0.co;2-a

Type

Journal article

Journal

Biotechnol Bioeng

Publication Date

20/04/2000

Volume

68

Pages

191 - 203

Keywords

Animals, Biocompatible Materials, Chickens, Conalbumin, Egg Proteins, Egg White, Membranes, Artificial, Molecular Weight, Muramidase, Ovalbumin, Polymers, Sulfones, Ultrafiltration