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Galactoglucomannan Recovery with Hydrophilic and Hydrophobic Membranes: Process Performance and Cost Estimations

Al-Rudainy, Basel LU ; Galbe, Mats LU ; Lipnizki, Frank LU and Wallberg, Ola LU (2019) In Membranes 9(8). p.99-99
Abstract
In this study, we compared the GR51PP (hydrophobic/polysulfone) membrane with a series of hydrophilic (regenerated cellulose) membranes with the aim of increasing the retention of products and decreasing membrane fouling. The raw material used was a sodium-based spent sulfite liquor from the sulfite pulping process of spruce and pine. The results show that the hydrophilic membranes were superior to the hydrophobic membranes in terms of higher fluxes (up to twice the magnitude), higher product retentions and less fouling (up to five times lower fouling). The fouling was probably caused by pore blocking as observed in earlier studies. However, the hydrophilic membranes had a lower affinity for lignin, which was indicated by the lower... (More)
In this study, we compared the GR51PP (hydrophobic/polysulfone) membrane with a series of hydrophilic (regenerated cellulose) membranes with the aim of increasing the retention of products and decreasing membrane fouling. The raw material used was a sodium-based spent sulfite liquor from the sulfite pulping process of spruce and pine. The results show that the hydrophilic membranes were superior to the hydrophobic membranes in terms of higher fluxes (up to twice the magnitude), higher product retentions and less fouling (up to five times lower fouling). The fouling was probably caused by pore blocking as observed in earlier studies. However, the hydrophilic membranes had a lower affinity for lignin, which was indicated by the lower retention and fouling. This also resulted in a separation degree, which was higher compared with the hydrophobic membrane, thus yielding a higher galactoglucomannan (GGM) purity. 2D HSQC NMR results show that no major structural differences were present in the hydrophilic and hydrophobic retentates. A techno-economical evaluation resulted in the RC70PP being chosen as the most cost-efficient membrane in terms of flux and product recovery. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
galactoglucomannan, lignin, lignin-carbohydrate-complex, lignosulfonates, ultrafiltration, fouling, Cost estimations
in
Membranes
volume
9
issue
8
pages
16 pages
publisher
MDPI AG
ISSN
2077-0375
DOI
10.3390/membranes9080099
language
English
LU publication?
yes
id
ca91a25d-ebf3-4129-8986-d04c20842ce6
date added to LUP
2019-08-13 09:57:09
date last changed
2019-08-15 02:15:28
@article{ca91a25d-ebf3-4129-8986-d04c20842ce6,
  abstract     = {In this study, we compared the GR51PP (hydrophobic/polysulfone) membrane with a series of hydrophilic (regenerated cellulose) membranes with the aim of increasing the retention of products and decreasing membrane fouling. The raw material used was a sodium-based spent sulfite liquor from the sulfite pulping process of spruce and pine. The results show that the hydrophilic membranes were superior to the hydrophobic membranes in terms of higher fluxes (up to twice the magnitude), higher product retentions and less fouling (up to five times lower fouling). The fouling was probably caused by pore blocking as observed in earlier studies. However, the hydrophilic membranes had a lower affinity for lignin, which was indicated by the lower retention and fouling. This also resulted in a separation degree, which was higher compared with the hydrophobic membrane, thus yielding a higher galactoglucomannan (GGM) purity. 2D HSQC NMR results show that no major structural differences were present in the hydrophilic and hydrophobic retentates. A techno-economical evaluation resulted in the RC70PP being chosen as the most cost-efficient membrane in terms of flux and product recovery.},
  author       = {Al-Rudainy, Basel and Galbe, Mats and Lipnizki, Frank and Wallberg, Ola},
  issn         = {2077-0375},
  keyword      = {galactoglucomannan,lignin,lignin-carbohydrate-complex,lignosulfonates,ultrafiltration,fouling,Cost estimations},
  language     = {eng},
  month        = {08},
  number       = {8},
  pages        = {99--99},
  publisher    = {MDPI AG},
  series       = {Membranes},
  title        = {Galactoglucomannan Recovery with Hydrophilic and Hydrophobic Membranes: Process Performance and Cost Estimations},
  url          = {http://dx.doi.org/10.3390/membranes9080099},
  volume       = {9},
  year         = {2019},
}