Printer Friendly

Biodegradation of spent pulping liquor lignins under mesophilic and thermophilic anaerobic conditions.

Application: This study may help mills improve the efficiency of their anaerobic digesters.


We conducted a laboratory scale feasibility study on the anaerobic treatment of spent pulping liquor effluent in upflow anaerobic sludge bed reactors. We tested thermophilic and mesophilic conditions and found that, in spite of high levels of sodium and lignin in the liquor, up to 80% of CODs can be successfully removed at a specific removal rate of 0.22 g COD [g.sup.-1] VSS [d.sup.-1] for mesophilic conditions and 0.57 g COD [g.sup.-1] VSS [d.sup.-1] for thermophilic conditions. Throughout the experiment, we observed lignin accumulation in the mesophilic reactor, but not in the thermophilic reactor. Lignin measurements confirmed that up to 59% of lignin was degraded under thermophilic conditions. It appeared that higher activity of thermophilic biomass coupled with higher solubility and hence bioavailability of lignin under thermophilic conditions contributed to the observed lignin removal. S!

Tartakovsky, Cimpoia, and Guiot are with the Biotechnology Research Institute, NRCC, 6100 Royalmount Ave., Montreal, Quebec, Canada H4P 2R2; Lo is with Domtar Inc., Cornwall, Ontario; Petti is with MDS Nordion, Ottawa, Ontario; and Liard is a consultant. Email Guiot at
COPYRIGHT 2003 Paper Industry Management Association
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2003, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

Article Details
Printer friendly Cite/link Email Feedback
Title Annotation:Environmental
Author:Guiot, Serge R.
Publication:Solutions - for People, Processes and Paper
Date:Apr 1, 2003
Previous Article:Selective removal of chloride and potassium in kraft pulp mills.
Next Article:New or revised TIPS and Test Methods.

Related Articles
Eating TRASH.
Impact of metals on the biodegradation of organic pollutants.
On-site aerobic treatment at high and varying process water temperatures.
Application of pulping models to investigate the performance of commercial continuous digesters.
Effect of cooking temperature on kraft pulping of hardwood.
Pulp/wood products.
The role of syntrophic associations in sustaining anaerobic mineralization of chlorinated organic compounds.
Metabolic biomarkers for monitoring in situ anaerobic hydrocarbon degradation.
Ambitious EEC Energy finalizing R & D agreements.
Occupational hygiene in two combined-drum-and-tunnel composting plants managing source separated biowaste and sludge.

Terms of use | Privacy policy | Copyright © 2021 Farlex, Inc. | Feedback | For webmasters