Separation of lignin in kraft cooking liquor from a continuous digester by ultrafiltration at temperatures above 100 degrees C
Wallberg, Ola LU
and Jönsson, Ann-Sofi
LU
(2006)
In Desalination
195(1-3).
p.187-200
- Abstract
- Lignin was extracted by ultrafiltration from kraft cooking liquors taken directly from a continuous digester. The temperature of the liquors was 145 degrees C (softwood) or 135 degrees C (hardwood), the total dry solids content was 18% and the pH 13-14. Methods for start-up, shut-down and cleaning of conventional UF equipment modified for this demanding application, were developed. The influence of transmembrane pressure, cross-flow velocity and temperature on the performance of two ceramic membranes with cut-offs of 5,000 and 15,000 Da was studied. The flux of softwood liquor at 145 degrees C and a TMP of 400 kPa was 100 l/m(2) h for the membrane with the 15,000 Da cutoff and 50 l/m(2) h for the membrane with the 5,000 Da cut-off. The... (More)
- Lignin was extracted by ultrafiltration from kraft cooking liquors taken directly from a continuous digester. The temperature of the liquors was 145 degrees C (softwood) or 135 degrees C (hardwood), the total dry solids content was 18% and the pH 13-14. Methods for start-up, shut-down and cleaning of conventional UF equipment modified for this demanding application, were developed. The influence of transmembrane pressure, cross-flow velocity and temperature on the performance of two ceramic membranes with cut-offs of 5,000 and 15,000 Da was studied. The flux of softwood liquor at 145 degrees C and a TMP of 400 kPa was 100 l/m(2) h for the membrane with the 15,000 Da cutoff and 50 l/m(2) h for the membrane with the 5,000 Da cut-off. The retention of lignin was 20% and 30% for the 15,000 Da and 5,000 Da membranes, respectively. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/397510
- author
- Wallberg, Ola
LU
and Jönsson, Ann-Sofi
LU
- organization
- publishing date
- 2006
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- high, temperature, ceramic membranes, ultrafiltration, Kraft cooking liquor, lignin
- in
- Desalination
- volume
- 195
- issue
- 1-3
- pages
- 187 - 200
- publisher
- Elsevier
- external identifiers
-
- wos:000239850200017
- scopus:33746278904
- ISSN
- 1873-4464
- DOI
- 10.1016/j.desal.2005.11.011
- language
- English
- LU publication?
- yes
- id
- 61d83340-e671-431d-9f3f-bd3f43595bd0 (old id 397510)
- date added to LUP
- 2016-04-01 12:16:41
- date last changed
- 2023-11-11 18:56:53
@article{61d83340-e671-431d-9f3f-bd3f43595bd0,
abstract = {{Lignin was extracted by ultrafiltration from kraft cooking liquors taken directly from a continuous digester. The temperature of the liquors was 145 degrees C (softwood) or 135 degrees C (hardwood), the total dry solids content was 18% and the pH 13-14. Methods for start-up, shut-down and cleaning of conventional UF equipment modified for this demanding application, were developed. The influence of transmembrane pressure, cross-flow velocity and temperature on the performance of two ceramic membranes with cut-offs of 5,000 and 15,000 Da was studied. The flux of softwood liquor at 145 degrees C and a TMP of 400 kPa was 100 l/m(2) h for the membrane with the 15,000 Da cutoff and 50 l/m(2) h for the membrane with the 5,000 Da cut-off. The retention of lignin was 20% and 30% for the 15,000 Da and 5,000 Da membranes, respectively.}},
author = {{Wallberg, Ola and Jönsson, Ann-Sofi}},
issn = {{1873-4464}},
keywords = {{high; temperature; ceramic membranes; ultrafiltration; Kraft cooking liquor; lignin}},
language = {{eng}},
number = {{1-3}},
pages = {{187--200}},
publisher = {{Elsevier}},
series = {{Desalination}},
title = {{Separation of lignin in kraft cooking liquor from a continuous digester by ultrafiltration at temperatures above 100 degrees C}},
url = {{http://dx.doi.org/10.1016/j.desal.2005.11.011}},
doi = {{10.1016/j.desal.2005.11.011}},
volume = {{195}},
year = {{2006}},
}