Comparison of slow sand filtration and microfiltration as pretreatments for inland desalination via reverse osmosis

Andrea F. Corral; Umur Yenal; Roy Strickle; Dongxu Yan; Eric Holler; Chris Hill; Wendell P. Ela; Robert G. Arnold

doi:10.1016/j.desal.2013.11.034

Comparison of slow sand filtration and microfiltration as pretreatments for inland desalination via reverse osmosis

Andrea F. Corral
, Umur Yenal
, Roy Strickle
, Dongxu Yan
, Eric Holler
, Chris Hill
, Wendell P. Ela
, Robert G. Arnold

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

39 Scopus citations

Abstract

A pilot study was conducted from October 2007 to November 2010 to establish the long-term feasibility of using reverse osmosis (RO) treatment to manage salt levels in Central Arizona Project water. Pretreatments consisting of microfiltration (MF) and slow sand filtration (SSF) were compared based on performance-turbidity removal, silt density index (SDI), volume treated between cleaning events and protection of downstream RO-during side-by-side operation over a yearlong period. SSF always produced feed water that was suitable for RO treatment (SDI. <. 5). However, MF consistently provided filtrate with SDI. <. 3, and long-term RO performance improved significantly with MF as pretreatment. Although the economic costs of MF and SSF pretreatments are similar; MF is preferred based on the quality of treated water and stability of downstream RO operation.

Original language	English (US)
Pages (from-to)	1-9
Number of pages	9
Journal	Desalination
Volume	334
Issue number	1
DOIs	https://doi.org/10.1016/j.desal.2013.11.034
State	Published - Feb 3 2014
Externally published	Yes

Keywords

Desalination
Economic analysis
Microfiltration
Silt density index
Slow sand filtration

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
General Materials Science
Water Science and Technology
Mechanical Engineering

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10.1016/j.desal.2013.11.034

Cite this

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title = "Comparison of slow sand filtration and microfiltration as pretreatments for inland desalination via reverse osmosis",

abstract = "A pilot study was conducted from October 2007 to November 2010 to establish the long-term feasibility of using reverse osmosis (RO) treatment to manage salt levels in Central Arizona Project water. Pretreatments consisting of microfiltration (MF) and slow sand filtration (SSF) were compared based on performance-turbidity removal, silt density index (SDI), volume treated between cleaning events and protection of downstream RO-during side-by-side operation over a yearlong period. SSF always produced feed water that was suitable for RO treatment (SDI. <. 5). However, MF consistently provided filtrate with SDI. <. 3, and long-term RO performance improved significantly with MF as pretreatment. Although the economic costs of MF and SSF pretreatments are similar; MF is preferred based on the quality of treated water and stability of downstream RO operation.",

keywords = "Desalination, Economic analysis, Microfiltration, Silt density index, Slow sand filtration",

author = "Corral, \{Andrea F.\} and Umur Yenal and Roy Strickle and Dongxu Yan and Eric Holler and Chris Hill and Ela, \{Wendell P.\} and Arnold, \{Robert G.\}",

note = "Funding Information: The authors appreciate the critical financial and in-kind support from the US Bureau of Reclamation , the Metropolitan Domestic Water Improvement District , Town of Marana , Oro Valley Water Utility , Flowing Wells Irrigation District , and City of Tucson . Robert Seaman, Jason Decker, Patrick Mette and Justin Nixon of the University of Arizona assisted with the sampling and maintenance at the pilot plant. Thanks in particular to Dr. Charles Moody for the valuable comments and other contributions rendered during the revision of this paper. Appendix A ",

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doi = "10.1016/j.desal.2013.11.034",

language = "English (US)",

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pages = "1--9",

journal = "Desalination",

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AU - Corral, Andrea F.

AU - Yenal, Umur

AU - Strickle, Roy

AU - Yan, Dongxu

AU - Holler, Eric

AU - Hill, Chris

AU - Ela, Wendell P.

AU - Arnold, Robert G.

N1 - Funding Information: The authors appreciate the critical financial and in-kind support from the US Bureau of Reclamation , the Metropolitan Domestic Water Improvement District , Town of Marana , Oro Valley Water Utility , Flowing Wells Irrigation District , and City of Tucson . Robert Seaman, Jason Decker, Patrick Mette and Justin Nixon of the University of Arizona assisted with the sampling and maintenance at the pilot plant. Thanks in particular to Dr. Charles Moody for the valuable comments and other contributions rendered during the revision of this paper. Appendix A

PY - 2014/2/3

Y1 - 2014/2/3

N2 - A pilot study was conducted from October 2007 to November 2010 to establish the long-term feasibility of using reverse osmosis (RO) treatment to manage salt levels in Central Arizona Project water. Pretreatments consisting of microfiltration (MF) and slow sand filtration (SSF) were compared based on performance-turbidity removal, silt density index (SDI), volume treated between cleaning events and protection of downstream RO-during side-by-side operation over a yearlong period. SSF always produced feed water that was suitable for RO treatment (SDI. <. 5). However, MF consistently provided filtrate with SDI. <. 3, and long-term RO performance improved significantly with MF as pretreatment. Although the economic costs of MF and SSF pretreatments are similar; MF is preferred based on the quality of treated water and stability of downstream RO operation.

AB - A pilot study was conducted from October 2007 to November 2010 to establish the long-term feasibility of using reverse osmosis (RO) treatment to manage salt levels in Central Arizona Project water. Pretreatments consisting of microfiltration (MF) and slow sand filtration (SSF) were compared based on performance-turbidity removal, silt density index (SDI), volume treated between cleaning events and protection of downstream RO-during side-by-side operation over a yearlong period. SSF always produced feed water that was suitable for RO treatment (SDI. <. 5). However, MF consistently provided filtrate with SDI. <. 3, and long-term RO performance improved significantly with MF as pretreatment. Although the economic costs of MF and SSF pretreatments are similar; MF is preferred based on the quality of treated water and stability of downstream RO operation.

KW - Desalination

KW - Economic analysis

KW - Microfiltration

KW - Silt density index

KW - Slow sand filtration

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Comparison of slow sand filtration and microfiltration as pretreatments for inland desalination via reverse osmosis

Abstract

Keywords

ASJC Scopus subject areas

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