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Back-pulsing as an energy-saving method in the microfiltration of milk

Arkell, Anders LU ; Vrgoc, Filip LU and Jönsson, Ann-Sofi LU (2014) In International Dairy Journal 35(1). p.1-5
Abstract
Extended shelf-life milk can be produced by a combination of microfiltration and pasteurisation. However, due to the need for high cross-flow velocity during microfiltration, the energy consumption is high. One way of decreasing the energy demand during microfiltration is to use back-pulsing for fouling control. Microfiltration was performed in constant flux mode on skim milk to measure the fouling rate. Different frequencies and durations of back-pulsing were investigated to determine the optimal conditions. The most promising conditions were used to evaluate the degree to which the cross-flow velocity could be decreased without significantly affecting the performance of the membrane. It was found that short pulses (0.2 s) at a frequency... (More)
Extended shelf-life milk can be produced by a combination of microfiltration and pasteurisation. However, due to the need for high cross-flow velocity during microfiltration, the energy consumption is high. One way of decreasing the energy demand during microfiltration is to use back-pulsing for fouling control. Microfiltration was performed in constant flux mode on skim milk to measure the fouling rate. Different frequencies and durations of back-pulsing were investigated to determine the optimal conditions. The most promising conditions were used to evaluate the degree to which the cross-flow velocity could be decreased without significantly affecting the performance of the membrane. It was found that short pulses (0.2 s) at a frequency of 1 min-1 were most efficient, and the membrane performance was only slightly affected by reducing the cross-flow velocity from 5.8 m s-1 to 4.5 m s-1 with back-pulsing. This corresponds to a reduction in the energy requirement of 50%. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
International Dairy Journal
volume
35
issue
1
pages
1 - 5
publisher
Elsevier
external identifiers
  • wos:000329106800001
  • scopus:84887392953
ISSN
0958-6946
DOI
10.1016/j.idairyj.2013.10.006
language
English
LU publication?
yes
id
7c4ba2a1-4788-409f-ada2-de9da39188cc (old id 4139822)
alternative location
http://www.sciencedirect.com/science/article/pii/S0958694613002550#
date added to LUP
2013-11-14 10:43:37
date last changed
2017-11-05 04:08:02
@article{7c4ba2a1-4788-409f-ada2-de9da39188cc,
  abstract     = {Extended shelf-life milk can be produced by a combination of microfiltration and pasteurisation. However, due to the need for high cross-flow velocity during microfiltration, the energy consumption is high. One way of decreasing the energy demand during microfiltration is to use back-pulsing for fouling control. Microfiltration was performed in constant flux mode on skim milk to measure the fouling rate. Different frequencies and durations of back-pulsing were investigated to determine the optimal conditions. The most promising conditions were used to evaluate the degree to which the cross-flow velocity could be decreased without significantly affecting the performance of the membrane. It was found that short pulses (0.2 s) at a frequency of 1 min-1 were most efficient, and the membrane performance was only slightly affected by reducing the cross-flow velocity from 5.8 m s-1 to 4.5 m s-1 with back-pulsing. This corresponds to a reduction in the energy requirement of 50%.},
  author       = {Arkell, Anders and Vrgoc, Filip and Jönsson, Ann-Sofi},
  issn         = {0958-6946},
  language     = {eng},
  number       = {1},
  pages        = {1--5},
  publisher    = {Elsevier},
  series       = {International Dairy Journal},
  title        = {Back-pulsing as an energy-saving method in the microfiltration of milk},
  url          = {http://dx.doi.org/10.1016/j.idairyj.2013.10.006},
  volume       = {35},
  year         = {2014},
}