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Characterization of Extracellular Polymeric Substances (Eps) Produced by Cloacibacterium normanense Isolated from Wastewater Sludge for Sludge Settling and Dewatering

Klai, Nouha; Hoang, N. V.; Yan, Song; Tyagi, Rajeshwar Dayal; Surampalli, Rao Y. (2015). Characterization of Extracellular Polymeric Substances (Eps) Produced by Cloacibacterium normanense Isolated from Wastewater Sludge for Sludge Settling and Dewatering Journal of Civil & Environmental Engineering , vol. 5 . p. 191. DOI: 10.4172/2165-784X.1000191.

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Résumé

In this study, extracellular polymeric substances (EPSs) producing strain was isolated from municipal wastewater sludge (MWWS). Growth profile and the EPS production by Cloacibacterium normanense using wastewater sludge as raw material in shake flask fermentation for 96 h were investigated. The highest concentration of S-EPS (13.0 ± 0.8 g/L) and C-EPS (0.3 ± 0.1 g/L) were attained at 48 h of fermentation. S-EPS revealed higher flocculation activity (94.2%) and dewaterability (59.9%) than other types of EPS in kaolin suspension. The dewaterability of MWWS with 2 g suspended solids (SS)/L was improved by 37.6% using 0.02 ± 0.01 g/L of S-EPS and 600 mg/L of Al2(SO4)3. The study showed a promising approach of new isolated strain to produce high concentration EPS in sludge with high flocculation activity as well as good settling.

Type de document: Article
Mots-clés libres: bacterial polymers; extracellular polymeric substances; pollution control; sludge; wastewater
Centre: Centre Eau Terre Environnement
Date de dépôt: 25 avr. 2018 15:42
Dernière modification: 25 avr. 2018 15:42
URI: http://espace.inrs.ca/id/eprint/3961

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