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Techno-economic impact of air sparging prior to purification of alkaline extracted wheat bran hemicelluloses by membrane filtration

Thuvander, Johan LU and Jönsson, Ann Sofi LU (2020) In Separation and Purification Technology 253.
Abstract

Air sparging of alkaline-extracted wheat bran hemicelluloses prior to ultrafiltration has been shown to increase the flux. The techno-economic impact of air sparging on the cost of concentration and purification of wheat bran hemicelluloses by ultrafiltration and diafiltration was studied in this work. Two alkaline hemicellulose solutions were purified until the conductivity of the diafiltration permeate was <1 mS/cm. Both solutions were pretreated by the removal of suspended matter using dead-end filtration with diatomaceous earth as filter aid. One of the solutions was further pretreated by air sparging for 4 h at 80 °C prior to concentration by ultrafiltration. Air sparging increased the average flux during ultrafiltration from 52... (More)

Air sparging of alkaline-extracted wheat bran hemicelluloses prior to ultrafiltration has been shown to increase the flux. The techno-economic impact of air sparging on the cost of concentration and purification of wheat bran hemicelluloses by ultrafiltration and diafiltration was studied in this work. Two alkaline hemicellulose solutions were purified until the conductivity of the diafiltration permeate was <1 mS/cm. Both solutions were pretreated by the removal of suspended matter using dead-end filtration with diatomaceous earth as filter aid. One of the solutions was further pretreated by air sparging for 4 h at 80 °C prior to concentration by ultrafiltration. Air sparging increased the average flux during ultrafiltration from 52 L/m2 h to 151 L/m2 h, and during diafiltration from 46 L/m2 h to 130 L/m2 h. A higher diafiltration factor was needed for the air-sparged solution, requiring a higher amount of diafiltration water. However, the cost of purifying the hemicelluloses was reduced from 1375 €/ton hemicelluloses to 1122 €/ton by sparging the solution with air prior to membrane filtration.

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publication status
published
subject
keywords
Air sparging, Diafiltration, Hemicelluloses, Ultrafiltration, Wheat bran
in
Separation and Purification Technology
volume
253
article number
117498
publisher
Elsevier
external identifiers
  • scopus:85088943592
ISSN
1383-5866
DOI
10.1016/j.seppur.2020.117498
language
English
LU publication?
yes
id
259cd455-ab3b-4c81-bfcb-77755cb70a04
date added to LUP
2020-08-11 11:16:11
date last changed
2023-12-04 19:25:06
@article{259cd455-ab3b-4c81-bfcb-77755cb70a04,
  abstract     = {{<p>Air sparging of alkaline-extracted wheat bran hemicelluloses prior to ultrafiltration has been shown to increase the flux. The techno-economic impact of air sparging on the cost of concentration and purification of wheat bran hemicelluloses by ultrafiltration and diafiltration was studied in this work. Two alkaline hemicellulose solutions were purified until the conductivity of the diafiltration permeate was &lt;1 mS/cm. Both solutions were pretreated by the removal of suspended matter using dead-end filtration with diatomaceous earth as filter aid. One of the solutions was further pretreated by air sparging for 4 h at 80 °C prior to concentration by ultrafiltration. Air sparging increased the average flux during ultrafiltration from 52 L/m<sup>2</sup> h to 151 L/m<sup>2</sup> h, and during diafiltration from 46 L/m<sup>2</sup> h to 130 L/m<sup>2</sup> h. A higher diafiltration factor was needed for the air-sparged solution, requiring a higher amount of diafiltration water. However, the cost of purifying the hemicelluloses was reduced from 1375 €/ton hemicelluloses to 1122 €/ton by sparging the solution with air prior to membrane filtration.</p>}},
  author       = {{Thuvander, Johan and Jönsson, Ann Sofi}},
  issn         = {{1383-5866}},
  keywords     = {{Air sparging; Diafiltration; Hemicelluloses; Ultrafiltration; Wheat bran}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Separation and Purification Technology}},
  title        = {{Techno-economic impact of air sparging prior to purification of alkaline extracted wheat bran hemicelluloses by membrane filtration}},
  url          = {{http://dx.doi.org/10.1016/j.seppur.2020.117498}},
  doi          = {{10.1016/j.seppur.2020.117498}},
  volume       = {{253}},
  year         = {{2020}},
}