Influence of prefiltration on membrane performance during isolation of lignin-carbohydrate complexes from spent sulfite liquor
Al-Rudainy, Basel LU ; Galbe, Mats LU and Wallberg, Ola LU
(2017)
In Separation and Purification Technology
187.
p.380-388
- Abstract
In this study, we examined the isolation of lignin-carbohydrate complexes (LCCs) from sodium-based spent sulfite liquor, in conjunction with minimization of membrane fouling. We screened 3 polysulfone (PS) membranes with cutoffs of 100, 50, and 25 kDa, respectively. Flux and retention for the 100- and 50-kDa membranes had the same order of magnitude, indicating that these properties were determined by fouling that formed on the membrane—not pore size. The PS membrane with the 50-kDa cutoff performed best in terms of flux and retention of lignin-carbohydrate complexes and experienced the least membrane fouling. Two prefiltration methods were used to decrease the fouling of the 50-kDa membrane: a 0.2-μm PS microfiltration membrane and... (More)
In this study, we examined the isolation of lignin-carbohydrate complexes (LCCs) from sodium-based spent sulfite liquor, in conjunction with minimization of membrane fouling. We screened 3 polysulfone (PS) membranes with cutoffs of 100, 50, and 25 kDa, respectively. Flux and retention for the 100- and 50-kDa membranes had the same order of magnitude, indicating that these properties were determined by fouling that formed on the membrane—not pore size. The PS membrane with the 50-kDa cutoff performed best in terms of flux and retention of lignin-carbohydrate complexes and experienced the least membrane fouling. Two prefiltration methods were used to decrease the fouling of the 50-kDa membrane: a 0.2-μm PS microfiltration membrane and dead-end filtration with 10-um filter cloth and a 4 wt% mixture of kieselguhr (diatomite) and spent sulfite liquor prior to filtration. Prefiltration of the SSL with microfiltration increased the flux 3-fold and decreased the fouling grade from 49% to 7.2%. Dead-end filtration effected a 16% increase in flux and a fouling grade of 17%. The retention of LCC during microfiltration was high, which resulted in a loss of high-molecular-weight products, whereas the loss of LCC during dead-end filtration was negligible. A 50-kDa PS membrane performed best with regard to the recovery of lignin-carbohydrate complexes from spent sulfite liquor. Also, dead-end filtration is a promising method for eliminating membrane fouling.
(Less)
- author
- Al-Rudainy, Basel
LU
; Galbe, Mats
LU
and Wallberg, Ola
LU
- organization
- publishing date
- 2017-10-31
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Dead-end filtration, Fouling, Galactoglucomannan, Lignin, Lignin-carbohydrate-complex, Microfiltration, Prefiltration, Spent sulfite liquor, Ultrafiltration
- in
- Separation and Purification Technology
- volume
- 187
- pages
- 9 pages
- publisher
- Elsevier
- external identifiers
-
- scopus:85021749900
- wos:000409150700040
- ISSN
- 1383-5866
- DOI
- 10.1016/j.seppur.2017.06.031
- project
- Isolation of hemicelluloses from spent-sulfite-liquor
- language
- English
- LU publication?
- yes
- id
- db8cf127-c15b-4253-ace2-eff13ad00e28
- date added to LUP
- 2017-07-18 12:21:30
- date last changed
- 2024-03-17 17:40:29
@article{db8cf127-c15b-4253-ace2-eff13ad00e28,
abstract = {{<p>In this study, we examined the isolation of lignin-carbohydrate complexes (LCCs) from sodium-based spent sulfite liquor, in conjunction with minimization of membrane fouling. We screened 3 polysulfone (PS) membranes with cutoffs of 100, 50, and 25 kDa, respectively. Flux and retention for the 100- and 50-kDa membranes had the same order of magnitude, indicating that these properties were determined by fouling that formed on the membrane—not pore size. The PS membrane with the 50-kDa cutoff performed best in terms of flux and retention of lignin-carbohydrate complexes and experienced the least membrane fouling. Two prefiltration methods were used to decrease the fouling of the 50-kDa membrane: a 0.2-μm PS microfiltration membrane and dead-end filtration with 10-um filter cloth and a 4 wt% mixture of kieselguhr (diatomite) and spent sulfite liquor prior to filtration. Prefiltration of the SSL with microfiltration increased the flux 3-fold and decreased the fouling grade from 49% to 7.2%. Dead-end filtration effected a 16% increase in flux and a fouling grade of 17%. The retention of LCC during microfiltration was high, which resulted in a loss of high-molecular-weight products, whereas the loss of LCC during dead-end filtration was negligible. A 50-kDa PS membrane performed best with regard to the recovery of lignin-carbohydrate complexes from spent sulfite liquor. Also, dead-end filtration is a promising method for eliminating membrane fouling.</p>}},
author = {{Al-Rudainy, Basel and Galbe, Mats and Wallberg, Ola}},
issn = {{1383-5866}},
keywords = {{Dead-end filtration; Fouling; Galactoglucomannan; Lignin; Lignin-carbohydrate-complex; Microfiltration; Prefiltration; Spent sulfite liquor; Ultrafiltration}},
language = {{eng}},
month = {{10}},
pages = {{380--388}},
publisher = {{Elsevier}},
series = {{Separation and Purification Technology}},
title = {{Influence of prefiltration on membrane performance during isolation of lignin-carbohydrate complexes from spent sulfite liquor}},
url = {{http://dx.doi.org/10.1016/j.seppur.2017.06.031}},
doi = {{10.1016/j.seppur.2017.06.031}},
volume = {{187}},
year = {{2017}},
}