Effects of flocculation on direct filtration performance

Paul K. Westerhoff; John E. Tobiason

Effects of flocculation on direct filtration performance

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The Surface Water Treatment Rule (SWTR) will require filtration of most surface waters, as the EPA recognizes filtration and disinfection as methods to meet specified goals for the removal and/or inactivation of a variety of microorganisms of health concern, including viruses and Giardia cysts. These biological 'particles' vary greatly in size (i.e., 0.05 μm versus 10 μm), as well as other characteristics. This, and the fact that many previously unfiltered supplies of high quality may be treated by direct (coagulation, flocculation, filtration) or contact (coagulation, filtration) filtration, suggests the need for an improved understanding of the role of suspended particle size and flocculation in filtration performance. The objective of this study was to investigate the effects of chemical addition and flocculation duration on filtration performance as measured by particle removal and head loss development.

Original language	English (US)
Title of host publication	Water Research for the New Decade
Publisher	Publ by American Water Works Assoc
Pages	683-696
Number of pages	14
ISBN (Print)	0898675901
State	Published - Dec 1 1991
Externally published	Yes
Event	Proceedings of the 1991 AWWA Annual Conference - Philadelphia, PA, USA Duration: Jun 23 1991 → Jun 27 1991

Publication series

Name	Proceedings - AWWA Annual Conference
ISSN (Print)	0360-814X

Other

Other	Proceedings of the 1991 AWWA Annual Conference
City	Philadelphia, PA, USA
Period	6/23/91 → 6/27/91

ASJC Scopus subject areas

Engineering(all)

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Cite this

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title = "Effects of flocculation on direct filtration performance",

abstract = "The Surface Water Treatment Rule (SWTR) will require filtration of most surface waters, as the EPA recognizes filtration and disinfection as methods to meet specified goals for the removal and/or inactivation of a variety of microorganisms of health concern, including viruses and Giardia cysts. These biological 'particles' vary greatly in size (i.e., 0.05 μm versus 10 μm), as well as other characteristics. This, and the fact that many previously unfiltered supplies of high quality may be treated by direct (coagulation, flocculation, filtration) or contact (coagulation, filtration) filtration, suggests the need for an improved understanding of the role of suspended particle size and flocculation in filtration performance. The objective of this study was to investigate the effects of chemical addition and flocculation duration on filtration performance as measured by particle removal and head loss development.",

author = "Westerhoff, {Paul K.} and Tobiason, {John E.}",

year = "1991",

month = dec,

day = "1",

language = "English (US)",

isbn = "0898675901",

series = "Proceedings - AWWA Annual Conference",

publisher = "Publ by American Water Works Assoc",

pages = "683--696",

booktitle = "Water Research for the New Decade",

note = "Proceedings of the 1991 AWWA Annual Conference ; Conference date: 23-06-1991 Through 27-06-1991",

}

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T1 - Effects of flocculation on direct filtration performance

AU - Westerhoff, Paul K.

AU - Tobiason, John E.

PY - 1991/12/1

Y1 - 1991/12/1

N2 - The Surface Water Treatment Rule (SWTR) will require filtration of most surface waters, as the EPA recognizes filtration and disinfection as methods to meet specified goals for the removal and/or inactivation of a variety of microorganisms of health concern, including viruses and Giardia cysts. These biological 'particles' vary greatly in size (i.e., 0.05 μm versus 10 μm), as well as other characteristics. This, and the fact that many previously unfiltered supplies of high quality may be treated by direct (coagulation, flocculation, filtration) or contact (coagulation, filtration) filtration, suggests the need for an improved understanding of the role of suspended particle size and flocculation in filtration performance. The objective of this study was to investigate the effects of chemical addition and flocculation duration on filtration performance as measured by particle removal and head loss development.

AB - The Surface Water Treatment Rule (SWTR) will require filtration of most surface waters, as the EPA recognizes filtration and disinfection as methods to meet specified goals for the removal and/or inactivation of a variety of microorganisms of health concern, including viruses and Giardia cysts. These biological 'particles' vary greatly in size (i.e., 0.05 μm versus 10 μm), as well as other characteristics. This, and the fact that many previously unfiltered supplies of high quality may be treated by direct (coagulation, flocculation, filtration) or contact (coagulation, filtration) filtration, suggests the need for an improved understanding of the role of suspended particle size and flocculation in filtration performance. The objective of this study was to investigate the effects of chemical addition and flocculation duration on filtration performance as measured by particle removal and head loss development.

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M3 - Conference contribution

AN - SCOPUS:0026375092

SN - 0898675901

T3 - Proceedings - AWWA Annual Conference

SP - 683

EP - 696

BT - Water Research for the New Decade

PB - Publ by American Water Works Assoc

T2 - Proceedings of the 1991 AWWA Annual Conference

Y2 - 23 June 1991 through 27 June 1991

ER -