Removal of Cryptosporidium parvum oocysts by rapid sand filtration with ballasted flocculation-filtration and intermediate downwashes

Vitaly Gitis; Viatcheslav Freger; Roy C. Haugth; Robert M. Clark

doi:10.1002/aheh.200200584

Removal of Cryptosporidium parvum oocysts by rapid sand filtration with ballasted flocculation-filtration and intermediate downwashes

Vitaly Gitis
, Viatcheslav Freger
, Roy C. Haugth
, Robert M. Clark

Zuckerberg Institute for Water Research

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

A novel and efficient protocol optimising deep-bed filtration of surface water was developed. The innovation lies in ballasted-flocculation filtration and an intermediate downwash. The approach is based on the assumption that kaolin particles with a partial positive charge may adsorb onto the surface of C. parvum oocysts and neutralize their negative charge. Application of this technology enhanced removal of inorganic particles and Cryptosporidium parvum oocysts by approximately 30% and shortened the ripening stage of the filtration process from 1 h to about 10 min.

Original language	English
Pages (from-to)	355-364
Number of pages	10
Journal	Acta Hydrochimica et Hydrobiologica
Volume	33
Issue number	4
DOIs	https://doi.org/10.1002/aheh.200200584
State	Published - 1 Sep 2005

Keywords

Deep-bed filtration
Hydrodynamic forces
Kaolin
Particle addition
Ripening

ASJC Scopus subject areas

Environmental Chemistry
Aquatic Science
Water Science and Technology
General Environmental Science

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10.1002/aheh.200200584

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title = "Removal of Cryptosporidium parvum oocysts by rapid sand filtration with ballasted flocculation-filtration and intermediate downwashes",

abstract = "A novel and efficient protocol optimising deep-bed filtration of surface water was developed. The innovation lies in ballasted-flocculation filtration and an intermediate downwash. The approach is based on the assumption that kaolin particles with a partial positive charge may adsorb onto the surface of C. parvum oocysts and neutralize their negative charge. Application of this technology enhanced removal of inorganic particles and Cryptosporidium parvum oocysts by approximately 30\% and shortened the ripening stage of the filtration process from 1 h to about 10 min.",

keywords = "Deep-bed filtration, Hydrodynamic forces, Kaolin, Particle addition, Ripening",

author = "Vitaly Gitis and Viatcheslav Freger and Haugth, \{Roy C.\} and Clark, \{Robert M.\}",

year = "2005",

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T1 - Removal of Cryptosporidium parvum oocysts by rapid sand filtration with ballasted flocculation-filtration and intermediate downwashes

AU - Gitis, Vitaly

AU - Freger, Viatcheslav

AU - Haugth, Roy C.

AU - Clark, Robert M.

PY - 2005/9/1

Y1 - 2005/9/1

N2 - A novel and efficient protocol optimising deep-bed filtration of surface water was developed. The innovation lies in ballasted-flocculation filtration and an intermediate downwash. The approach is based on the assumption that kaolin particles with a partial positive charge may adsorb onto the surface of C. parvum oocysts and neutralize their negative charge. Application of this technology enhanced removal of inorganic particles and Cryptosporidium parvum oocysts by approximately 30% and shortened the ripening stage of the filtration process from 1 h to about 10 min.

AB - A novel and efficient protocol optimising deep-bed filtration of surface water was developed. The innovation lies in ballasted-flocculation filtration and an intermediate downwash. The approach is based on the assumption that kaolin particles with a partial positive charge may adsorb onto the surface of C. parvum oocysts and neutralize their negative charge. Application of this technology enhanced removal of inorganic particles and Cryptosporidium parvum oocysts by approximately 30% and shortened the ripening stage of the filtration process from 1 h to about 10 min.

KW - Deep-bed filtration

KW - Hydrodynamic forces

KW - Kaolin

KW - Particle addition

KW - Ripening

UR - https://www.scopus.com/pages/publications/26944497239

U2 - 10.1002/aheh.200200584

DO - 10.1002/aheh.200200584

M3 - Article

AN - SCOPUS:26944497239

SN - 0323-4320

VL - 33

SP - 355

EP - 364

JO - Acta Hydrochimica et Hydrobiologica

JF - Acta Hydrochimica et Hydrobiologica

IS - 4

ER -

Removal of Cryptosporidium parvum oocysts by rapid sand filtration with ballasted flocculation-filtration and intermediate downwashes

Abstract

Keywords

ASJC Scopus subject areas

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