Advanced

Purification of process water in a thermomechanical pulp mill by nanofiltration

Persson, Tobias LU ; Ren, Jun-Li and Jönsson, Ann-Sofi LU (2009) LUTKDH/(TKKA-7001)/1-7/(2009).
Abstract
Process water from a Swedish thermomechanical pulp mill was purified by consecutive treatment by microfiltration, ultrafiltration and nanofiltration. In the present study the nanofiltration step was studied. The flux and retention of four nanofiltration membranes were compared. The NF99HF membrane (Alfa Laval, Lund, Sweden), had significantly higher flux and higher retention of lignin and charged compounds (measured as conductivity) compared to the others. The flux was 220 l/m2 h and the retention of calcium ions was 99% at 20 bar transmembrane pressure and a temperature of 50°C. At the same conditions, the conductivity (measured at 20°C) was decreased from 1 500 µS/cm in the feed solution to 150 µS/cm in the nanofiltration permeate.
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Book/Report
publication status
unpublished
subject
volume
LUTKDH/(TKKA-7001)/1-7/(2009)
publisher
[Publisher information missing]
language
English
LU publication?
yes
id
b6dd6c38-f7cb-4a63-8967-e1a8d1d2e887 (old id 1492518)
date added to LUP
2009-10-23 12:45:04
date last changed
2016-04-16 11:33:38
@misc{b6dd6c38-f7cb-4a63-8967-e1a8d1d2e887,
  abstract     = {Process water from a Swedish thermomechanical pulp mill was purified by consecutive treatment by microfiltration, ultrafiltration and nanofiltration. In the present study the nanofiltration step was studied. The flux and retention of four nanofiltration membranes were compared. The NF99HF membrane (Alfa Laval, Lund, Sweden), had significantly higher flux and higher retention of lignin and charged compounds (measured as conductivity) compared to the others. The flux was 220 l/m2 h and the retention of calcium ions was 99% at 20 bar transmembrane pressure and a temperature of 50°C. At the same conditions, the conductivity (measured at 20°C) was decreased from 1 500 µS/cm in the feed solution to 150 µS/cm in the nanofiltration permeate.},
  author       = {Persson, Tobias and Ren, Jun-Li and Jönsson, Ann-Sofi},
  language     = {eng},
  publisher    = {ARRAY(0x537f3b0)},
  title        = {Purification of process water in a thermomechanical pulp mill by nanofiltration},
  volume       = {LUTKDH/(TKKA-7001)/1-7/(2009)},
  year         = {2009},
}