alexa Characterization of Extracellular Polymeric Substances
ISSN: 2165-784X

Journal of Civil & Environmental Engineering
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Research Article

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

Klai Nouha1, Hoang NV2, Yan Song1, Tyagi RD1* and Surampalli RY3
1University of Quebec, Institut National de la Recherche Scientifique, Centre Eau, Terre & Environnement, 490 de la Couronne, Québec, G1K 9A9, Canada
2IET-VAST, 18 Hoang Quoc Viet, Hanoi, Vietnam
3Department of Civil Engineering, University of Nebraska-Lincoln, N104 SEC PO Box 886105 Lincoln, NE 68588-6105, USA
Corresponding Author : Tyagi RD
University of Quebec
Institut National de la Recherche Scientifique
Centre Eau, Terre and Environnement
490 de la Couronne, Québec, G1K 9A9, Canada
Tel: +1 418 654 2617
E-mail: [email protected]
Received October 02, 2015; Accepted October 13, 2015; Published October 23, 2015
Citation: Nouha K, Hoang NV, Song Y, Tagi RD, Surampalli RY (2015) Characterization of Extracellular Polymeric Substances (Eps) Produced by Cloacibacterium normanense Isolated from Wastewater Sludge for Sludge Settling and Dewatering. J Civil Environ Eng 5:191. doi:10.4172/2165-784X.1000191
Copyright: © 2015 Nouha K, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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Abstract

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.

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