Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/47366
Citations | ||
Scopus | Web of Science® | Altmetric |
---|---|---|
?
|
?
|
Type: | Journal article |
Title: | Impacts of morphological, physical and chemical properties of sludge flocs on dewaterability of activated sludge |
Author: | Jin, B. Wilen, B. Lant, P. |
Citation: | Chemical Engineering Journal, 2004; 98(1-2):115-126 |
Publisher: | Elsevier Science Sa |
Issue Date: | 2004 |
ISSN: | 1385-8947 |
Statement of Responsibility: | Bo Jin, Britt-Marie Wilén and Paul Lant |
Abstract: | This study examined how the floc characteristics affect dewaterability of activated sludge. The floc properties were characterized by morphological parameters (floc size distribution, fractal dimension and filament index), physical properties (flocculating ability, surface charge, relative hydrophobicity and viscosity), and chemical constituents in sludge and extracted extracellular polymeric substances (EPS), including the polymeric compounds protein, humic substances, carbohydrates and the ions Ca²⁺, Mg²⁺, Fe³⁺ and Al³⁺. The dewaterability was defined in terms of the bound water content and capillary suction time (CST). The bound water and CST corresponded to a similar indication with respect to dewaterability of activated sludge. The floc physical parameters were the most important factors which effect significantly on the water binding ability of the sludge flocs. The morphological characteristics had relatively weak impact on the dewaterability. The polymeric components protein and carbohydrate had a significant contribution to enhance the water binding ability of the sludge flocs. The effect of humic substances in the sludge on the dewaterability was, however, insignificant. The CST had good statistical correlations with the polymeric constituents measured in both sludge and the extracted EPS, and the bound water was only correlated well with the individual polymers measured in the sludge. High concentration of Ca²⁺, Mg²⁺, Fe³⁺ and Al³⁺ had significant improvement for dewaterability. |
Keywords: | Correlation analysis Correlation Capillary suction Water content Extract Viscosity Hydrophobicity Surface charge Physical properties Fractal dimension Particle size distribution Activated sludge Chemical properties |
Description: | Copyright © 2003 Elsevier B.V. All rights reserved. |
DOI: | 10.1016/j.cej.2003.05.002 |
Description (link): | http://www.elsevier.com/wps/find/journaldescription.cws_home/601273/description#description |
Published version: | http://dx.doi.org/10.1016/j.cej.2003.05.002 |
Appears in Collections: | Aurora harvest Earth and Environmental Sciences publications Environment Institute publications |
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.