Degradation of paper mill water components in laboratory tests with pure cultures of bacteria

Citation
Le. Lindberg et al., Degradation of paper mill water components in laboratory tests with pure cultures of bacteria, BIODEGRADAT, 12(3), 2001, pp. 141-148
Citations number
9
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Biotecnology & Applied Microbiology
Journal title
BIODEGRADATION
ISSN journal
0923-9820 → ACNP
Volume
12
Issue
3
Year of publication
2001
Pages
141 - 148
Database
ISI
SICI code
0923-9820(2001)12:3<141:DOPMWC>2.0.ZU;2-B
Abstract
The degradation of dissolved and colloidal substances from thermomechanical pulp (TMP) by bacteria isolated from a paper mill was studied in a laborat ory slide culture system. Burkholderia cepacia strains hydrolysed triglycer ides to free fatty acids, and the liberated unsaturated fatty acids were th en degraded to some extent. Saturated fatty acids were not notably degraded . However, the branched anteiso-heptadecanoic fatty acid was degraded almos t like the unsaturated fatty acids. About 30% of the steryl esters were deg raded during 11 days, increasing the concentrations of free sterols. Approx imately 25% of the dehydroabietic, and 45% of the abietic and isopimaric re sin acids were degraded during 11 days. The degree of unsaturation seemed t o be of greater importance for the degradation of fatty acids than the mola r mass. No degradation of dissolved hemicelluloses could be observed with a ny of the nine bacterial strains studied. Burkholderia cepacia strains and one Bacillus coagulans strain degraded monomeric fructose and glucose in wi nter TMP water, but in summer TMP water, with much lower sugar concentratio ns, also other Bacillus strains degraded monomeric sugars.