期刊
SEPARATION AND PURIFICATION TECHNOLOGY
卷 41, 期 2, 页码 147-154出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.seppur.2004.05.005
关键词
inorganic membranes; enzymatic cleaning; whey protein solutions; hydraulic cleanliness; chemical cleanliness
In this work inorganic membranes used for whey protein fractionation were cleaned with enzymatic detergents. The inorganic membrane Carbosep(R) M1 (Orelis S.A., France), of 150 kg/mol molecular weight cut-off and ZrO2 filtering layer, was used and the commercial detergent P3-Ultrasil(R) 62 (Henkel lberica S.A., Spain) was selected for the cleaning. Hydraulic and chemical methods were considered to characterize the membrane cleanliness. Cleaning efficiency was observed to be a function of the operating conditions: recycling versus non-recycling of permeate, cleaning solution pH. enzymatic agent concentration and cleaning time. The optimum conditions to perform the cleaning were related to the optimum conditions to hydrolyze whey proteins in a batch reactor. Very high cleaning efficiencies (similar to100%) were reached in short operating times (20 min). However, residual matter was detected on the membrane surface after the cleaning. (C) 2004 Elsevier B.V. All rights reserved.
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