Evaluation of alkali resistant nanofiltration membranes for the separation of hemicellulose from concentrated alkaline process liquors

  • Posted on: 12 June 2018
  • By: mmiltner
TitleEvaluation of alkali resistant nanofiltration membranes for the separation of hemicellulose from concentrated alkaline process liquors
Publication TypeJournal Article
Year of Publication2006
AuthorsSchlesinger R, G├Âtzinger G, Sixta H, Friedl A, Harasek M
JournalDesalination
Volume192
Pagination303-314
KeywordsAlkali resistant membranes, Hemicellulose, Membrane screening, Molar mass dependent retentio, n Size exclusion chromatography, Nanofiltration, Sodium hydroxide
Abstract

The performance of five polymeric nanofiltration and tight ultrafiltration membranes was investigated during separation of hemicellulose from process liquors containing 200 g/l sodium hydroxide. The effect of pressure and temperature on flux and retention was determined to enable optimization of operating conditions. Retention behavior was further elucidated by calculating retention as a function of molar mass obtained from size exclusion chromatography (SEC) between 100 and 50,000 g/mol. The experimental data show that hemicellulose is almost quantitatively retained at molar masses above 1,000 g/mol. Two of the membranes exhibiting excellent overall hemicellulose retention (around 90%) are most suitable for efficient removal of hemicellulose from the process. The results emphasize the need for accurate retention data from industrial effluents and process conditions.

URLhttps://www.sciencedirect.com/science/article/pii/S0011916406002542
DOI10.1016/j.desal.2005.05.031