Optimisation of dual coagulation process for the removal of turbidity in source water using streaming potential

Dayarathne, HNP; Angove, MJ; Paudel, SR; Ngo, HH; Guo, W; Mainali, B

Optimisation of dual coagulation process for the removal of turbidity in source water using streaming potential

Dayarathne, HNP Angove, MJ Paudel, SR Ngo, HH Guo, W

Mainali, B

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Groundwater for Sustainable Development, 2022, 16, pp. 100714
Issue Date:: 2022-02-01

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Field	Value	Language
dc.contributor.author	Dayarathne, HNP
dc.contributor.author	Angove, MJ
dc.contributor.author	Paudel, SR
dc.contributor.author	Ngo, HH
dc.contributor.author	Guo, W https://orcid.org/0000-0001-5542-2858
dc.contributor.author	Mainali, B
dc.date.accessioned	2023-01-26T05:53:09Z
dc.date.available	2023-01-26T05:53:09Z
dc.date.issued	2022-02-01
dc.identifier.citation	Groundwater for Sustainable Development, 2022, 16, pp. 100714
dc.identifier.issn	2352-801X
dc.identifier.issn	2352-801X
dc.identifier.uri	http://hdl.handle.net/10453/165471
dc.description.abstract	The charge at the surface of suspended particles and the degree of its neutralisation play an important role for achieving better turbidity removal efficiency in the coagulation process. Therefore, optimisation of the process critically requires continuous measurement or monitoring of surface charge. Streaming potential for this purpose can be considered as a good potential option in dual coagulation system. This study investigated factors that alter the streaming potential of source water, including pH, turbidity, humic acid concentration, inorganic coagulants, ionic strength, and polyelectrolyte concentrations. A range of dual coagulation systems were tested using the streaming potential to optimise coagulant doses., And jar test experiments were performed to estimate the extent of floc formation and turbidity reduction. Several inorganic and organic coagulants were combined in dual coagulation systems; Ferric chloride (FeCl3), Titanium chloride (TiCl4), and Aluminium chloride (AlCl3), Non-ionic polyacrylamide (PAM) and anionic polyacrylamide (aPAM). Turbidity removal efficiencies ranged from 83% to 99%. Ti (IV) systems gave the most efficient removal, which was not improved by the addition of polymer. PAM and aPAM added to Al (III) and Fe (III) flocculant systems, did improve the total removal efficiency and the rate of removal, with the effect more pronounced for Fe (III). Overall, PAM yielded the best results, particularly in combination with Fe (III). The streaming potential proved to be an excellent measure of optimum coagulant dosing.
dc.language	en
dc.publisher	Elsevier
dc.relation.ispartof	Groundwater for Sustainable Development
dc.relation.isbasedon	10.1016/j.gsd.2021.100714
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.title	Optimisation of dual coagulation process for the removal of turbidity in source water using streaming potential
dc.type	Journal Article
utslib.citation.volume	16
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	*
utslib.copyright.embargo	2024-02-01T00:00:00+1000Z
dc.date.updated	2023-01-26T05:53:08Z
pubs.publication-status	Published
pubs.volume	16

Abstract:

The charge at the surface of suspended particles and the degree of its neutralisation play an important role for achieving better turbidity removal efficiency in the coagulation process. Therefore, optimisation of the process critically requires continuous measurement or monitoring of surface charge. Streaming potential for this purpose can be considered as a good potential option in dual coagulation system. This study investigated factors that alter the streaming potential of source water, including pH, turbidity, humic acid concentration, inorganic coagulants, ionic strength, and polyelectrolyte concentrations. A range of dual coagulation systems were tested using the streaming potential to optimise coagulant doses., And jar test experiments were performed to estimate the extent of floc formation and turbidity reduction. Several inorganic and organic coagulants were combined in dual coagulation systems; Ferric chloride (FeCl3), Titanium chloride (TiCl4), and Aluminium chloride (AlCl3), Non-ionic polyacrylamide (PAM) and anionic polyacrylamide (aPAM). Turbidity removal efficiencies ranged from 83% to 99%. Ti (IV) systems gave the most efficient removal, which was not improved by the addition of polymer. PAM and aPAM added to Al (III) and Fe (III) flocculant systems, did improve the total removal efficiency and the rate of removal, with the effect more pronounced for Fe (III). Overall, PAM yielded the best results, particularly in combination with Fe (III). The streaming potential proved to be an excellent measure of optimum coagulant dosing.

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http://hdl.handle.net/10453/165471