Normal view MARC view ISBD view

De-clogging of CFMF membranes : (Record no. 25824)

MARC details
000 -LEADER
fixed length control field	05065nas a2200421 i 4500
005 - DATE AND TIME OF LATEST TRANSACTION
control field	20260818085818.0
008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION
fixed length control field	170699s1991 th u m rtt 0\| a1eng d
035 ## - SYSTEM CONTROL NUMBER
System control number	.b10183322
099 #9 - LOCAL FREE-TEXT CALL NUMBER (OCLC)
Classification number	AIT Diss. no. EV-91-1
100 0# - MAIN ENTRY--PERSONAL NAME
Personal name	Sompol Boonthanon
245 10 - TITLE STATEMENT
Title	De-clogging of CFMF membranes :
Remainder of title	application in water and wastewater treatment
260 ## - PUBLICATION, DISTRIBUTION, ETC.
Place of publication, distribution, etc.	Bangkok :
Name of publisher, distributor, etc.	Asian Institute of Technology,
Date of publication, distribution, etc.	1991
300 ## - PHYSICAL DESCRIPTION
Extent	171 p.
490 1# - SERIES STATEMENT
Series statement	Dissertation ;
Volume/sequential designation	no. EV-91-1
500 ## - GENERAL NOTE
General note	A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Technical Science, School of Environment, Resources and Development
502 ## - DISSERTATION NOTE
Dissertation note	Thesis (Ph.D.) - Asian Institute of Technology, 1991
520 ## - SUMMARY, ETC.
Summary, etc.	Crossflow microfiltration (CFMF), technically being a very effective filtration process for separation of both colloidal and suspended particles from liquid, however, at this stage is found to be commercially viable mainly for obtaining high value products but not yet in water and wastewater application due to the high installation and operation costs. And further, the problems of f lux decline resulting from fouling, deposition and internal clogging of membrane etc., demand more research in an attempt to improve t he effectiveness of the process, especially in terms of flu x improvement techniques. In this present study, different sets of CFMF experiments were carried out to stud y the use of backflush as a de-clogging technique in enhancing the process performance. The membranes used in this study were bought from SCT1, France, but the membrane housing and t he whole experimental set up was designed and fabricated locally. Synthetic and natural suspensions were tried out. Backflush technique was found to improve the efficiency of the filtration process when synthetic suspensions of clay alone and clay together with colloids were used. The effect of backflush frequency, Tf, and backflush duration, Tb , were studied and it was observed that for CFMF with clay suspension Tf = 1 min., Tb= 1 sand with clay and colloids as suspension , Tf = 2 min. , Tb = 1 s were found to be the best operating conditions. The improvement in productivity, Ipv, of the stabilized productivity of the two experiments were 290% and 210%, respectively, compared to CFMF without backflush. In order to study the application of CFMF with backflush technique, natural water and filter backwash wastewater from water treatment plant were used. The best operating condition for these two suspensions were Tf = 5 min ., Tb= 5 sand Tf = 1 min., and Tb= 1 s respectively. The Ipy of the stabilized productivity were 220% and 1,300% respectively, compared to CFMF without backflush. Thus backflush technique can be effectively used as a de-clogging technique in CFMF for treating filter backwash wastewater. Both t he new and used membranes were chemically cleaned and further subjected to filterability test before using in the experiments. These two techniques, i .e ., chemical cleaning and filterability test were developed by the researcher. Other de-c logging technique, i.e., pulsation cleaning technique was also tried; but it was found to be less effective compared to backflush technique. Further, when other f lux improvement techniques like flocculation of suspension was investigated, it was observed that though this technique has promising effect in increasing t he performance , the effect of using flocculation coup led with backflush technique is even more significant, evidenced by t he I of t he stabilized productivity which is 1,010% compared to that with CFM~ without backflush and without flocculation. This tremendous improvement in CFMF performance can thus be said as a breakthrough in membrane technology.
650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element	Sewage
General subdivision	Purification
--	Filtration
700 1# - ADDED ENTRY--PERSONAL NAME
Personal name	Harada, Hideki,
Relator term	Chairperson
700 1# - ADDED ENTRY--PERSONAL NAME
Personal name	Vigneswaran, Saravanamuthu,
Relator term	Examination Committee
700 1# - ADDED ENTRY--PERSONAL NAME
Personal name	Aim, Roger Ben,
Relator term	Examination Committee
700 1# - ADDED ENTRY--PERSONAL NAME
Personal name	Mora, Jean-Claude,
Relator term	Examination Committee
700 0# - ADDED ENTRY--PERSONAL NAME
Personal name	Samorn Muttamara,
Relator term	Examination Committee
810 2# - SERIES ADDED ENTRY--CORPORATE NAME
Corporate name or jurisdiction name as entry element	Asian Institute of Technology.
Title of a work	Dissertation ;
Volume/sequential designation	no. EV-91-1
856 ## - ELECTRONIC LOCATION AND ACCESS
Materials specified	Full-Text
Uniform Resource Identifier	<a href="http://203.159.5.9/ait-thesis/detail.php?q=B17424">http://203.159.5.9/ait-thesis/detail.php?q=B17424</a>
907 ## - LOCAL DATA ELEMENT G, LDG (RLIN)
a	.b10183322
b	mnait
c	y
902 ## - LOCAL DATA ELEMENT B, LDB (RLIN)
a	240411
998 ## - LOCAL CONTROL INFORMATION (RLIN)
Operator's initials, OID (RLIN)	2
Cataloger's initials, CIN (RLIN)	951012
First date, FD (RLIN)	m
--	a
--	y
--	0
945 ## - LOCAL PROCESSING INFORMATION (OCLC)
l	mnait
945 ## - LOCAL PROCESSING INFORMATION (OCLC)
l	mnait
945 ## - LOCAL PROCESSING INFORMATION (OCLC)
l	mnarc
942 ## - ADDED ENTRY ELEMENTS (KOHA)
Koha item type	20-AIT Publication
942 ## - ADDED ENTRY ELEMENTS (KOHA)
Koha item type	40-Archives
909 ## - LOCAL ITEMS USED
Barcode	Barcode : 30050120726244
CREATED	CREATED : 1995-10-13
RECORD Id	RECORD # : i10218567
LPATRON	LPATRON : 1019383
LCHKIN	LCHKIN : 2008-05-23
RENEWALS	# RENEWALS : 0
--	# OVERDUE : 0
--	IUSE3 : 0
--	TOT CHKOUT : 3
--	TOT RENEW : 1
909 ## - LOCAL ITEMS USED
Barcode	Barcode : 30050160036439
CREATED	CREATED : 2016-01-02
RECORD Id	RECORD # : i12876057
LPATRON	LPATRON : 0
LCHKIN	LCHKIN : -
RENEWALS	# RENEWALS : 0
--	# OVERDUE : 0
--	IUSE3 : 0
--	TOT CHKOUT : 0
--	TOT RENEW : 0
909 ## - LOCAL ITEMS USED
Barcode	Barcode : 30050121074057
CREATED	CREATED : 2023-05-04
RECORD Id	RECORD # : i1344217x
LPATRON	LPATRON : 0
LCHKIN	LCHKIN : -
RENEWALS	# RENEWALS : 0
--	# OVERDUE : 0
--	IUSE3 : 0
--	TOT CHKOUT : 0
--	TOT RENEW : 0

Holdings
Not for loan	Home library	Current library	Shelving location	Date acquired	Full call number	Barcode	Date last seen	Copy number	Price effective from	Koha item type
Available for Loans	Asian Institute of Technology Library	Asian Institute of Technology Library	AIT Publications	18/08/2026	AIT Diss. no. EV-91-1	30050120726244	18/08/2026	1	18/08/2026	20-AIT Publication
Available for Loans	Asian Institute of Technology Library	Asian Institute of Technology Library	Archives	18/08/2026	AIT Diss. no. EV-91-1	30050160036439	18/08/2026		18/08/2026	40-Archives
Available for Loans	Asian Institute of Technology Library	Asian Institute of Technology Library	AIT Publications	18/08/2026	AIT Diss. no. EV-91-1	30050121074057	18/08/2026	2	18/08/2026	20-AIT Publication

De-clogging of CFMF membranes : (Record no. 25824)

AIT

Asian Institute of Technology Library