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Biopolymers Production by Mixed Culture and Their Applications in Water and Wastewater Treatment.

More, Tanaji, Yan, Song, Tyagi, Rajeshwar Dayal et Surampalli, Rao Y. (2015). Biopolymers Production by Mixed Culture and Their Applications in Water and Wastewater Treatment. Water Environment Research , vol. 87 , nº 6. p. 533-546. DOI: 10.2175/106143015X14212658614676.

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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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