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Method to assess the drying performance of water vapour-permeable membrane pouches for fruit juice preservation

Phinney, Randi LU ; Sjöholm, Ingegerd LU ; Östbring, Karolina LU and Rayner, Marilyn LU (2019) In Chemical Engineering Research and Design 152. p.433-446
Abstract

The aim of this work was to develop a method for assessing the drying performance of a hygienic, small-scale fruit juice preservation process called Solar Assisted Pervaporation (SAP). SAP is a batch process that allows for fruit juices or purées to be solar dried in water vapour-permeable membrane pouches in rural and remote areas. Traditional methods for measuring water vapour flux through membrane materials are not directly applicable for assessing the performance of SAP pouches, and so a new method was developed, considering a constant boundary condition on the inside of the pouch (i.e. water activity of 1.0). This paper presents a statistical validation of the method and then illustrates how it can be used to characterise membrane... (More)

The aim of this work was to develop a method for assessing the drying performance of a hygienic, small-scale fruit juice preservation process called Solar Assisted Pervaporation (SAP). SAP is a batch process that allows for fruit juices or purées to be solar dried in water vapour-permeable membrane pouches in rural and remote areas. Traditional methods for measuring water vapour flux through membrane materials are not directly applicable for assessing the performance of SAP pouches, and so a new method was developed, considering a constant boundary condition on the inside of the pouch (i.e. water activity of 1.0). This paper presents a statistical validation of the method and then illustrates how it can be used to characterise membrane performance, identify a two-level factorial regression model for drying flux as a function of temperature, relative humidity and air velocity and their interaction effects, and estimate an operational window for drying juices in SAP pouches in an indirect solar dryer. The repeatability of the method is high with a precision of 95% or more. The regression model and operational window can be used to optimise the design of an indirect solar dryer specifically suited for SAP pouches filled with fruit juices.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Fruit preservation, Membrane performance, Pervaporation, Solar drying, Two-level factorial analysis, Water vapour flux
in
Chemical Engineering Research and Design
volume
152
pages
14 pages
publisher
IChemE
external identifiers
  • scopus:85074225037
ISSN
0263-8762
DOI
10.1016/j.cherd.2019.09.045
language
English
LU publication?
yes
id
244ca628-986e-4fbf-bee6-ddf4f3252b87
date added to LUP
2019-11-13 13:16:13
date last changed
2020-01-13 02:31:27
@article{244ca628-986e-4fbf-bee6-ddf4f3252b87,
  abstract     = {<p>The aim of this work was to develop a method for assessing the drying performance of a hygienic, small-scale fruit juice preservation process called Solar Assisted Pervaporation (SAP). SAP is a batch process that allows for fruit juices or purées to be solar dried in water vapour-permeable membrane pouches in rural and remote areas. Traditional methods for measuring water vapour flux through membrane materials are not directly applicable for assessing the performance of SAP pouches, and so a new method was developed, considering a constant boundary condition on the inside of the pouch (i.e. water activity of 1.0). This paper presents a statistical validation of the method and then illustrates how it can be used to characterise membrane performance, identify a two-level factorial regression model for drying flux as a function of temperature, relative humidity and air velocity and their interaction effects, and estimate an operational window for drying juices in SAP pouches in an indirect solar dryer. The repeatability of the method is high with a precision of 95% or more. The regression model and operational window can be used to optimise the design of an indirect solar dryer specifically suited for SAP pouches filled with fruit juices.</p>},
  author       = {Phinney, Randi and Sjöholm, Ingegerd and Östbring, Karolina and Rayner, Marilyn},
  issn         = {0263-8762},
  language     = {eng},
  pages        = {433--446},
  publisher    = {IChemE},
  series       = {Chemical Engineering Research and Design},
  title        = {Method to assess the drying performance of water vapour-permeable membrane pouches for fruit juice preservation},
  url          = {http://dx.doi.org/10.1016/j.cherd.2019.09.045},
  doi          = {10.1016/j.cherd.2019.09.045},
  volume       = {152},
  year         = {2019},
}