Novel methodologies for determining a suitable polymer for effective sludge dewatering

To, VHP; Nguyen, TV; Vigneswaran, S; Bustamante, H; Higgins, M; Van Rys, D

Novel methodologies for determining a suitable polymer for effective sludge dewatering

To, VHP Nguyen, TV

Vigneswaran, S

Bustamante, H Higgins, M Van Rys, D

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Publication Type:: Journal Article
Citation:: Journal of Environmental Chemical Engineering, 2018, 6 (4), pp. 4206 - 4214
Issue Date:: 2018-08-01

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Field	Value	Language
dc.contributor.author	To, VHP	en_US
dc.contributor.author	Nguyen, TV https://orcid.org/0000-0003-3893-1217	en_US
dc.contributor.author	Vigneswaran, S https://orcid.org/0000-0002-8117-4322	en_US
dc.contributor.author	Bustamante, H	en_US
dc.contributor.author	Higgins, M	en_US
dc.contributor.author	Van Rys, D	en_US
dc.date.available	2020-08-01T19:05:48Z
dc.date.issued	2018-08-01	en_US
dc.identifier.citation	Journal of Environmental Chemical Engineering, 2018, 6 (4), pp. 4206 - 4214	en_US
dc.identifier.uri	http://hdl.handle.net/10453/127563
dc.description.abstract	© 2018 Elsevier Ltd. All rights reserved. Understanding the interactions between sludge particles and polymers during sludge dewatering is necessary to: firstly, maximize dewatered cake solids content; and secondly, minimize polymer demand. In this study, two scientific methodologies, namely the 'y-intercept' concept and Higgins modified centrifugal technique (Higgins MCT) were used to identify the optimum polymer demand and type for effective conditioning and dewatering. Results from the 'y-intercept' concept show that a large amount of polymer required during conditioning of anaerobically digested sludge (ADS) is mainly due to neutralization of soluble biopolymers. In contrast, conditioning of aerobically digested sludge (AEDS) and waste activated sludge (WAS) is mostly controlled by a polymer bridging mechanism. The results indicated that, in order to achieve maximum dewatering performance with minimum conditioning polymer requirement, high charge density polymers are suitable for ADS while branched (or cross-linked) polymers can be used for AEDS and WAS. The new lab-scale technique, Higgins MCT, was successfully implemented for measuring cake solids content achievable by centrifuge and determining the optimum polymer demand (OPD). The Higgins MCT also helped to understand the relationship between digestion, conditioning and dewatering.	en_US
dc.relation.ispartof	Journal of Environmental Chemical Engineering	en_US
dc.relation.isbasedon	10.1016/j.jece.2018.06.012	en_US
dc.rights	info:eu-repo/semantics/openAccess
dc.title	Novel methodologies for determining a suitable polymer for effective sludge dewatering	en_US
dc.type	Journal Article
utslib.citation.volume	4	en_US
utslib.citation.volume	6	en_US
utslib.for	0904 Chemical Engineering	en_US
utslib.for	0306 Physical Chemistry (incl. Structural)	en_US
utslib.for	0907 Environmental Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	open_access	*
pubs.issue	4	en_US
pubs.publication-status	Published	en_US
pubs.volume	6	en_US

Abstract:

© 2018 Elsevier Ltd. All rights reserved. Understanding the interactions between sludge particles and polymers during sludge dewatering is necessary to: firstly, maximize dewatered cake solids content; and secondly, minimize polymer demand. In this study, two scientific methodologies, namely the 'y-intercept' concept and Higgins modified centrifugal technique (Higgins MCT) were used to identify the optimum polymer demand and type for effective conditioning and dewatering. Results from the 'y-intercept' concept show that a large amount of polymer required during conditioning of anaerobically digested sludge (ADS) is mainly due to neutralization of soluble biopolymers. In contrast, conditioning of aerobically digested sludge (AEDS) and waste activated sludge (WAS) is mostly controlled by a polymer bridging mechanism. The results indicated that, in order to achieve maximum dewatering performance with minimum conditioning polymer requirement, high charge density polymers are suitable for ADS while branched (or cross-linked) polymers can be used for AEDS and WAS. The new lab-scale technique, Higgins MCT, was successfully implemented for measuring cake solids content achievable by centrifuge and determining the optimum polymer demand (OPD). The Higgins MCT also helped to understand the relationship between digestion, conditioning and dewatering.

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http://hdl.handle.net/10453/127563