Title :

Removal of Bacillus spores from stainless steel pipes by flow foam: Effect of the foam quality and velocity

Author(s) :

Al Saabi, Ahmad [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Dallagi, Heni [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Aloui, Fehti [Auteur]
Laboratoire d'Automatique, de Mécanique et d'Informatique industrielles et Humaines - UMR 8201 [LAMIH]
Faille, Christine [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Rauwel, Gaétan [Auteur]
Wauquier, Laurent [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Bouvier, Laurent [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Benezech, Thierry [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]

Journal title :

Journal of Food Engineering

Abbreviated title :

Journal of Food Engineering

Volume number :

289

Pages :

110273

Publisher :

Elsevier BV

Publication date :

2021-01

ISSN :

0260-8774

English keyword(s) :

Foam flow
Wall shear stress
Cleaning
Bacillus spores
Hygiene

HAL domain(s) :

Sciences du Vivant [q-bio]/Ingénierie des aliments

English abstract : [en]

Food industry cleaning operations must efficiently mitigate any risk of remaining unwanted contamination without consuming large amounts of water, chemicals and energy. This study's originality was in analysing the capacity ...
Show more >Food industry cleaning operations must efficiently mitigate any risk of remaining unwanted contamination without consuming large amounts of water, chemicals and energy. This study's originality was in analysing the capacity of flowing foams to remove Bacillus spores from stainless steel surfaces. A set-up was designed to allow the formation of wet foams to flow under three differing regimes: bubble-size rearrangement was observed at the wall with increased velocity, thus reducing cleaning efficiency. Foam at 50% air/water and low velocities permitted a 2 log removal of B. amyloliquefaciens spores, which is comparable to similar CIP conditions. Removal kinetics were modelled showing potentially very high constant rates at the start of cleaning. Such efficient cleaning was related to the local high wall shear stress fluctuations and to the capillary forces (low velocities, favorable bubble-size repartition and to the hydrophilicity of bacteria spores).Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
CNRS
INRA
ENSCL

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Research team(s) :

Processus aux Interfaces et Hygiène des Matériaux (PIHM)

Submission date :

2020-12-10T13:36:49Z