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Ce document n'est pas hébergé sur EspaceINRS.Résumé
Thirteen extracellular polymeric substances (EPS) producing bacterial strains were cultivated (as pure/mixed culture) in sterilized sludge (suspended solids: 25 g/L). The mixed culture produced higher concentrations of EPS (4.9 g/L) as compared to that of the pure culture (2.7-3.7 g/L). The harvested EPS were examined for their flocculation performance (turbidity removal and dewatering) in jar tests using kaolin suspensions with Ca²⁺. Broth (B-EPS) revealed high kaolin flocculating activity (91.2%) at very low concentrations (0.8 mg B-EPS/g kaolin) and it was comparable to the chemical polymer, Magnafloc-155 (90.4% at 0.2 mg/g kaolin). B-EPS also exhibited very good flocculation performance (turbidity removal %) in river water (93.5%), municipal wastewater (91.7%) and brewery wastewater (81.8%). The study revealed that the mixed culture consortium could be used for the production of highly efficient flocculants.
| Type de document: | Article |
|---|---|
| Mots-clés libres: | EPS; bioflocculants; biopolymers; flocculation; mixed culture; wastewater sludge; wastewater treatment; water treatment |
| Centre: | Centre Eau Terre Environnement |
| Date de dépôt: | 23 avr. 2018 15:17 |
| Dernière modification: | 23 avr. 2018 15:17 |
| URI: | https://espace.inrs.ca/id/eprint/3887 |
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