Reduction of energy demand by use of air sparging during ultrafiltration of alkali-extracted wheat bran hemicelluloses
(2018) In Chemical Engineering Research and Design 138. p.43-50- Abstract
- The flux during membrane filtration can be enhanced by the use of a two-phase gas–liquid flow. This has been shown to be an energy-efficient alternative to increasing the cross-flow velocity. In this work, air sparging was used to increase the flux during ultrafiltration of alkali-extracted wheat bran hemicelluloses. Batch filtration was performed in a pilot unit with a ceramic ultrafiltration membrane with a nominal cut-off of 10 kDa. Parametric studies with and without air sparging were performed at temperatures of 30 °C, 50 °C and 80 °C and cross-flow velocities of 1, 3, 5 and 7 m/s. The limiting flux was not affected by air sparging at 30 °C, while a slight increase was observed at 50 °C and a considerable increase was obtained at 80... (More)
- The flux during membrane filtration can be enhanced by the use of a two-phase gas–liquid flow. This has been shown to be an energy-efficient alternative to increasing the cross-flow velocity. In this work, air sparging was used to increase the flux during ultrafiltration of alkali-extracted wheat bran hemicelluloses. Batch filtration was performed in a pilot unit with a ceramic ultrafiltration membrane with a nominal cut-off of 10 kDa. Parametric studies with and without air sparging were performed at temperatures of 30 °C, 50 °C and 80 °C and cross-flow velocities of 1, 3, 5 and 7 m/s. The limiting flux was not affected by air sparging at 30 °C, while a slight increase was observed at 50 °C and a considerable increase was obtained at 80 °C. Air sparging reduced the energy demand per m3 permeate produced during dead-end batch ultrafiltration at 80 °C and 1 m/s from 0.96 kWh/m3 to 0.51 kWh/m3. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/660d64ce-13b9-4360-a786-5b1ffd7c810b
- author
- Thuvander, Johan LU ; Arkell, Anders LU and Jönsson, Ann-Sofi LU
- organization
- publishing date
- 2018-08-08
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Two-phase gas–liquid flow, Ultrafiltration, Hemicelluloses, Wheat bran, Flux enhancement
- in
- Chemical Engineering Research and Design
- volume
- 138
- pages
- 43 - 50
- publisher
- Institution of Chemical Engineers
- external identifiers
-
- scopus:85052222781
- ISSN
- 0263-8762
- DOI
- 10.1016/j.cherd.2018.08.001
- language
- English
- LU publication?
- yes
- id
- 660d64ce-13b9-4360-a786-5b1ffd7c810b
- date added to LUP
- 2018-09-17 15:53:47
- date last changed
- 2023-10-20 10:17:00
@article{660d64ce-13b9-4360-a786-5b1ffd7c810b, abstract = {{The flux during membrane filtration can be enhanced by the use of a two-phase gas–liquid flow. This has been shown to be an energy-efficient alternative to increasing the cross-flow velocity. In this work, air sparging was used to increase the flux during ultrafiltration of alkali-extracted wheat bran hemicelluloses. Batch filtration was performed in a pilot unit with a ceramic ultrafiltration membrane with a nominal cut-off of 10 kDa. Parametric studies with and without air sparging were performed at temperatures of 30 °C, 50 °C and 80 °C and cross-flow velocities of 1, 3, 5 and 7 m/s. The limiting flux was not affected by air sparging at 30 °C, while a slight increase was observed at 50 °C and a considerable increase was obtained at 80 °C. Air sparging reduced the energy demand per m3 permeate produced during dead-end batch ultrafiltration at 80 °C and 1 m/s from 0.96 kWh/m3 to 0.51 kWh/m3.}}, author = {{Thuvander, Johan and Arkell, Anders and Jönsson, Ann-Sofi}}, issn = {{0263-8762}}, keywords = {{Two-phase gas–liquid flow; Ultrafiltration; Hemicelluloses; Wheat bran; Flux enhancement}}, language = {{eng}}, month = {{08}}, pages = {{43--50}}, publisher = {{Institution of Chemical Engineers}}, series = {{Chemical Engineering Research and Design}}, title = {{Reduction of energy demand by use of air sparging during ultrafiltration of alkali-extracted wheat bran hemicelluloses}}, url = {{http://dx.doi.org/10.1016/j.cherd.2018.08.001}}, doi = {{10.1016/j.cherd.2018.08.001}}, volume = {{138}}, year = {{2018}}, }