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

More, Tanaji; Yan, Song; Tyagi, Rajeshwar Dayal; 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: http://espace.inrs.ca/id/eprint/3887

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