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Cleaning efficiency and impact on production fluxes of oxidising disinfectants on a pes ultrafiltration membrane fouled with proteins

Paper ID Volume ID Publish Year Pages File Format Full-Text
19156 43046 2010 5 PDF Available
Title
Cleaning efficiency and impact on production fluxes of oxidising disinfectants on a pes ultrafiltration membrane fouled with proteins
Abstract

The cleaning step in the ultrafiltration of skim milk is not always complete before the following disinfection start, raising concerns about the effect of disinfectants on any protein remaining. For a Koch polyethersulfone (PES) UF membrane [model HFK131], the fouling in skim milk UF is exclusively due to proteins. Used in right quantity, hypochlorite well finishes the cleaning and can also be used alone as a cleaner [removing 95% of the proteinaceous fouling]. However, if the amount of hypochlorite is not sufficient to end the cleaning, this can lead to large reductions production flux [a 13% decrease on skim milk flux was observed]. Other oxidants such as PVP-iodine, hydrogen peroxide, peracetic acid and sodium perborate do not achieve hydraulic cleanliness [90% of flux recovery]. Oxidants based on hydrogen peroxide and PVP-iodine, when used on a membrane which was still fouled by protein, yielded flux recovery worse than for a single rinsing.

Research highlights▶ The nature of the disinfectant can have a strong incidence on production fluxes if the previous cleaning is not properly done. ▶ The hypochlorite is also a good cleaner as it removes 95% of proteinaceous fouling. ▶ The hypochlorite used as disinfectant on a PES UF membrane where proteins remain finishes first the cleaning. ▶ The hypochlorite used in too lower quantity to well finish the cleaning, lead to large reductions production flux. ▶ Usually efficient cleaner formulated with surfactant becomes inefficient after an incomplete cleaning with hypochlorite of the membrane fouled with proteins. ▶ Oxidants based on hydrogen peroxyde used on a PES UF membrane still fouled with proteins yielded flux recovery worse than for a single rinsing.

Keywords
Membrane; Ultrafiltration; Proteins; Cleaning; Disinfection; Oxidant; Skim milk; Polyethersulfone
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Cleaning efficiency and impact on production fluxes of oxidising disinfectants on a pes ultrafiltration membrane fouled with proteins
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Publisher
Database: Elsevier - ScienceDirect
Journal: Food and Bioproducts Processing - Volume 88, Issue 4, December 2010, Pages 425–429
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us