Mechanism of clarification of colloidal suspension using composite dry powdered flocculant

Flocculation is a widely used process for particle removal in water/wastewater treatment. Clarification method by using composite flocculants in powder form has been proposed in the literature. Such composite flocculants are conveniently used in the flocculation process of small volume suspensions...

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Main Authors:	Kadooka, Hiroto, Jami, Mohammed Saedi, Tanaka, Takanori, Iwata, Masashi
Format:	Article
Language:	English
Published:	Elsevier Inc. 2016
Subjects:	TP155 Chemical engineering
Online Access:	http://irep.iium.edu.my/50153/ http://irep.iium.edu.my/50153/ http://irep.iium.edu.my/50153/ http://irep.iium.edu.my/50153/1/Published.pdf

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recordtype	eprints
spelling	iium-501532017-01-09T07:06:20Z http://irep.iium.edu.my/50153/ Mechanism of clarification of colloidal suspension using composite dry powdered flocculant Kadooka, Hiroto Jami, Mohammed Saedi Tanaka, Takanori Iwata, Masashi TP155 Chemical engineering Flocculation is a widely used process for particle removal in water/wastewater treatment. Clarification method by using composite flocculants in powder form has been proposed in the literature. Such composite flocculants are conveniently used in the flocculation process of small volume suspensions. In this study, fundamental aspects of the clarification mechanism of the composite dry powdered flocculant are investigated. 1.00 mg/mL suspension of polymethyl methacrylate particle (PMMA, 0.15 m in diameter) is used as a colloidal material. A model composite flocculant comprising an inorganic flocculant (aluminum sulfate), anionic polymer flocculant (copolymer of acrylic acid and acrylic amide), and a flocculation aid (calcium carbonate) is studied. The effects of each component on turbidity removal are examined. It is clarified that the order of addition, the state of polymer flocculant (powdered form or liquid form), and combination of components (polymer flocculant with/without aid particles) are critical for turbidity removal with combined use of flocculation aid, inorganic flocculant and polymer flocculant. When the composite dry powdered flocculant is added to a colloidal suspension, the inorganic flocculant dissolves immediately. The polymer flocculant particles disperse well in the suspension with the help of flocculation aid particles and dissolve moderately. The ions from inorganic flocculant result in formation of microflocs composed of both PMMA and flocculation aid particles. Flocculation aid particles play an important role;i.e.they accelerate flocculation of PMMA particles and attenuate the ability ofthe polymer flocculant particles to produce undissolved lumps. Elsevier Inc. 2016-06 Article PeerReviewed application/pdf en http://irep.iium.edu.my/50153/1/Published.pdf Kadooka, Hiroto and Jami, Mohammed Saedi and Tanaka, Takanori and Iwata, Masashi (2016) Mechanism of clarification of colloidal suspension using composite dry powdered flocculant. Journal of Water Process Engineering, 11. pp. 32-38. ISSN 2214-7144 http://www.sciencedirect.com/science/article/pii/S2214714416300976 10.1080/23311916.2016.1162384
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	TP155 Chemical engineering
spellingShingle	TP155 Chemical engineering Kadooka, Hiroto Jami, Mohammed Saedi Tanaka, Takanori Iwata, Masashi Mechanism of clarification of colloidal suspension using composite dry powdered flocculant
description	Flocculation is a widely used process for particle removal in water/wastewater treatment. Clarification method by using composite flocculants in powder form has been proposed in the literature. Such composite flocculants are conveniently used in the flocculation process of small volume suspensions. In this study, fundamental aspects of the clarification mechanism of the composite dry powdered flocculant are investigated. 1.00 mg/mL suspension of polymethyl methacrylate particle (PMMA, 0.15 m in diameter) is used as a colloidal material. A model composite flocculant comprising an inorganic flocculant (aluminum sulfate), anionic polymer flocculant (copolymer of acrylic acid and acrylic amide), and a flocculation aid (calcium carbonate) is studied. The effects of each component on turbidity removal are examined. It is clarified that the order of addition, the state of polymer flocculant (powdered form or liquid form), and combination of components (polymer flocculant with/without aid particles) are critical for turbidity removal with combined use of flocculation aid, inorganic flocculant and polymer flocculant. When the composite dry powdered flocculant is added to a colloidal suspension, the inorganic flocculant dissolves immediately. The polymer flocculant particles disperse well in the suspension with the help of flocculation aid particles and dissolve moderately. The ions from inorganic flocculant result in formation of microflocs composed of both PMMA and flocculation aid particles. Flocculation aid particles play an important role;i.e.they accelerate flocculation of PMMA particles and attenuate the ability ofthe polymer flocculant particles to produce undissolved lumps.
format	Article
author	Kadooka, Hiroto Jami, Mohammed Saedi Tanaka, Takanori Iwata, Masashi
author_facet	Kadooka, Hiroto Jami, Mohammed Saedi Tanaka, Takanori Iwata, Masashi
author_sort	Kadooka, Hiroto
title	Mechanism of clarification of colloidal suspension using composite dry powdered flocculant
title_short	Mechanism of clarification of colloidal suspension using composite dry powdered flocculant
title_full	Mechanism of clarification of colloidal suspension using composite dry powdered flocculant
title_fullStr	Mechanism of clarification of colloidal suspension using composite dry powdered flocculant
title_full_unstemmed	Mechanism of clarification of colloidal suspension using composite dry powdered flocculant
title_sort	mechanism of clarification of colloidal suspension using composite dry powdered flocculant
publisher	Elsevier Inc.
publishDate	2016
url	http://irep.iium.edu.my/50153/ http://irep.iium.edu.my/50153/ http://irep.iium.edu.my/50153/ http://irep.iium.edu.my/50153/1/Published.pdf
first_indexed	2023-09-18T21:10:52Z
last_indexed	2023-09-18T21:10:52Z
_version_	1777411243059970048

Mechanism of clarification of colloidal suspension using composite dry powdered flocculant

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