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Removal of UHT dairy fouling — An efficient cleaning process by optimizing the rate controlling alkaline cleaning step

Hagsten, Carin LU ; Innings, Fredrik LU ; Trägårdh, Christian LU ; Hamberg, Lars ; Paulsson, Marie LU and Nylander, Tommy LU (2019) In Food and Bioproducts Processing 113. p.101-107
Abstract

A rigid mineral-based deposit, termed ultra-high temperature (UHT) fouling, is formed on heat exchanger surfaces during milk processing at 140 °C. The removal of this type of fouling is for the first time assessed using a laser triangulation sensor and a camera, to measure changes in the thickness and to visualize structural changes in the fouling in situ. The process was monitored during both the alkali and acid cleaning steps. There was no global swelling of the fouling layer during alkali cleaning under the investigated conditions. However, significant degradation of the protein network was observed, which affected the acid cleaning step and the efficiency of the cleaning process. We conclude that treatment with alkali is required to... (More)

A rigid mineral-based deposit, termed ultra-high temperature (UHT) fouling, is formed on heat exchanger surfaces during milk processing at 140 °C. The removal of this type of fouling is for the first time assessed using a laser triangulation sensor and a camera, to measure changes in the thickness and to visualize structural changes in the fouling in situ. The process was monitored during both the alkali and acid cleaning steps. There was no global swelling of the fouling layer during alkali cleaning under the investigated conditions. However, significant degradation of the protein network was observed, which affected the acid cleaning step and the efficiency of the cleaning process. We conclude that treatment with alkali is required to facilitate the removal of deposits with high mineral content during the acid cleaning step. The results have implications for optimizing the cleaning process so as to minimize energy expenditure, while ensuring efficient heat transfer and maintaining product quality.

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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Cleaning, Cleaning agent concentration, Dairy fouling, Mineral deposit, Protein degradation, UHT
in
Food and Bioproducts Processing
volume
113
pages
101 - 107
publisher
Elsevier
external identifiers
  • scopus:85057977224
ISSN
0960-3085
DOI
10.1016/j.fbp.2018.11.010
language
English
LU publication?
yes
id
7970cc99-74f1-46e3-8bbe-41e9bf40bd87
date added to LUP
2019-01-02 09:46:27
date last changed
2023-11-18 09:37:16
@article{7970cc99-74f1-46e3-8bbe-41e9bf40bd87,
  abstract     = {{<p>A rigid mineral-based deposit, termed ultra-high temperature (UHT) fouling, is formed on heat exchanger surfaces during milk processing at 140 °C. The removal of this type of fouling is for the first time assessed using a laser triangulation sensor and a camera, to measure changes in the thickness and to visualize structural changes in the fouling in situ. The process was monitored during both the alkali and acid cleaning steps. There was no global swelling of the fouling layer during alkali cleaning under the investigated conditions. However, significant degradation of the protein network was observed, which affected the acid cleaning step and the efficiency of the cleaning process. We conclude that treatment with alkali is required to facilitate the removal of deposits with high mineral content during the acid cleaning step. The results have implications for optimizing the cleaning process so as to minimize energy expenditure, while ensuring efficient heat transfer and maintaining product quality.</p>}},
  author       = {{Hagsten, Carin and Innings, Fredrik and Trägårdh, Christian and Hamberg, Lars and Paulsson, Marie and Nylander, Tommy}},
  issn         = {{0960-3085}},
  keywords     = {{Cleaning; Cleaning agent concentration; Dairy fouling; Mineral deposit; Protein degradation; UHT}},
  language     = {{eng}},
  pages        = {{101--107}},
  publisher    = {{Elsevier}},
  series       = {{Food and Bioproducts Processing}},
  title        = {{Removal of UHT dairy fouling — An efficient cleaning process by optimizing the rate controlling alkaline cleaning step}},
  url          = {{http://dx.doi.org/10.1016/j.fbp.2018.11.010}},
  doi          = {{10.1016/j.fbp.2018.11.010}},
  volume       = {{113}},
  year         = {{2019}},
}