Filtration behaviors in constant-rate microfiltration of flocculated sewage secondary effluent accompanied with combined operation of physical and chemically enhanced backwashing

Filtration behaviors of sewage secondary effluent pretreated with flocculant were studied under constant filtration rate condition using ceramic microfiltration membranes. The process consisted of the periodic operations of the filtration (fouling) and backwashing (cleaning) cycles. The system was c...

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Main Authors:	Jami, Mohammed Saedi, Ohn, Than, Iritani, Eiji, Mukai, Yasuhito, Katagiri, Nobuyuki
Format:	Article
Language:	English
Published:	The Society of Powder Technology, Japan 2004
Subjects:	TP155 Chemical engineering
Online Access:	http://irep.iium.edu.my/42354/ http://irep.iium.edu.my/42354/ http://irep.iium.edu.my/42354/1/41_798.pdf

id	iium-42354
recordtype	eprints
spelling	iium-423542015-03-24T03:41:30Z http://irep.iium.edu.my/42354/ Filtration behaviors in constant-rate microfiltration of flocculated sewage secondary effluent accompanied with combined operation of physical and chemically enhanced backwashing Jami, Mohammed Saedi Ohn, Than Iritani, Eiji Mukai, Yasuhito Katagiri, Nobuyuki TP155 Chemical engineering Filtration behaviors of sewage secondary effluent pretreated with flocculant were studied under constant filtration rate condition using ceramic microfiltration membranes. The process consisted of the periodic operations of the filtration (fouling) and backwashing (cleaning) cycles. The system was capable of selecting two modes of membrane backwashing, i. e., physical backwashing or chemically enhanced backwashing. The time dependency of pressure drop across the filter cake in an operating cycle mainly due to the cake build-up was well described by the constant rate filtration equation for the compressible filter cake, and the increase with the cycle number in pressure drop across the membrane mainly due to the pore blocking was adequately correlated by the intermediate blocking law. Our experimental data clearly showed that the combined operation of physical and chemically enhanced backwashing was highly effective for the filtration of sewage secondary effluent when accompanied by the flocculation operation. The increased dosage of flocculant substantially reduced the cake resistance and irreversible pore plugging. Particularly, less frequent physical backwashing by addition of flocculant led to an increase in the average filtration rate. The Society of Powder Technology, Japan 2004-07-23 Article PeerReviewed application/pdf en http://irep.iium.edu.my/42354/1/41_798.pdf Jami, Mohammed Saedi and Ohn, Than and Iritani, Eiji and Mukai, Yasuhito and Katagiri, Nobuyuki (2004) Filtration behaviors in constant-rate microfiltration of flocculated sewage secondary effluent accompanied with combined operation of physical and chemically enhanced backwashing. Journal of the Society of Powder Technology, Japan , 41 (11). pp. 798-805. ISSN 0386-6157 https://www.jstage.jst.go.jp/article/sptj1978/41/11/41_11_798/_article
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 Jami, Mohammed Saedi Ohn, Than Iritani, Eiji Mukai, Yasuhito Katagiri, Nobuyuki Filtration behaviors in constant-rate microfiltration of flocculated sewage secondary effluent accompanied with combined operation of physical and chemically enhanced backwashing
description	Filtration behaviors of sewage secondary effluent pretreated with flocculant were studied under constant filtration rate condition using ceramic microfiltration membranes. The process consisted of the periodic operations of the filtration (fouling) and backwashing (cleaning) cycles. The system was capable of selecting two modes of membrane backwashing, i. e., physical backwashing or chemically enhanced backwashing. The time dependency of pressure drop across the filter cake in an operating cycle mainly due to the cake build-up was well described by the constant rate filtration equation for the compressible filter cake, and the increase with the cycle number in pressure drop across the membrane mainly due to the pore blocking was adequately correlated by the intermediate blocking law. Our experimental data clearly showed that the combined operation of physical and chemically enhanced backwashing was highly effective for the filtration of sewage secondary effluent when accompanied by the flocculation operation. The increased dosage of flocculant substantially reduced the cake resistance and irreversible pore plugging. Particularly, less frequent physical backwashing by addition of flocculant led to an increase in the average filtration rate.
format	Article
author	Jami, Mohammed Saedi Ohn, Than Iritani, Eiji Mukai, Yasuhito Katagiri, Nobuyuki
author_facet	Jami, Mohammed Saedi Ohn, Than Iritani, Eiji Mukai, Yasuhito Katagiri, Nobuyuki
author_sort	Jami, Mohammed Saedi
title	Filtration behaviors in constant-rate microfiltration of flocculated sewage secondary effluent accompanied with combined operation of physical and chemically enhanced backwashing
title_short	Filtration behaviors in constant-rate microfiltration of flocculated sewage secondary effluent accompanied with combined operation of physical and chemically enhanced backwashing
title_full	Filtration behaviors in constant-rate microfiltration of flocculated sewage secondary effluent accompanied with combined operation of physical and chemically enhanced backwashing
title_fullStr	Filtration behaviors in constant-rate microfiltration of flocculated sewage secondary effluent accompanied with combined operation of physical and chemically enhanced backwashing
title_full_unstemmed	Filtration behaviors in constant-rate microfiltration of flocculated sewage secondary effluent accompanied with combined operation of physical and chemically enhanced backwashing
title_sort	filtration behaviors in constant-rate microfiltration of flocculated sewage secondary effluent accompanied with combined operation of physical and chemically enhanced backwashing
publisher	The Society of Powder Technology, Japan
publishDate	2004
url	http://irep.iium.edu.my/42354/ http://irep.iium.edu.my/42354/ http://irep.iium.edu.my/42354/1/41_798.pdf
first_indexed	2023-09-18T21:00:23Z
last_indexed	2023-09-18T21:00:23Z
_version_	1777410583509860352

Filtration behaviors in constant-rate microfiltration of flocculated sewage secondary effluent accompanied with combined operation of physical and chemically enhanced backwashing

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