Effects of EBCT and water temperature on HAA removal using BAC

Hongwei Wu, Yuefeng F. Xie

Research output: Contribution to journalReview article

30 Citations (Scopus)

Abstract

This article discusses the removal of a major group of disinfection by-products (DBFs) - haloacetic acids (HAAs) - in biologically active carbon (BAC) or acclimated granular activated carbon (GAC). Precursor removal has been the main control strategy for DBPs. Using BAC to remove preformed HAAs is a new concept. Although it is known that water temperature and empty bed contact time (EBCT) affect the removal of HAAs in BAC, this study was undertaken to gain a better understanding of how these parameters affect removal. The results suggest that a 10-min EBCT should be used for 4°C waters and a 5-min EBCT should be used for waters at 10°C or higher. The results of this study could help utility managers better control HAAs by improving the general understanding of the effects of water temperature and EBCT. Information on HAA removal could be used to provide an alternative technique for HAA control. Water suppliers could use the information to improve the design and operation of GAC filters to achieve an effective reduction of HAAs. Enhanced HAA removal could help the water industry better comply with DBP regulations, improve water quality, and protect public health.

Original languageEnglish (US)
JournalJournal / American Water Works Association
Volume97
Issue number11
StatePublished - Nov 1 2005

Fingerprint

water temperature
Carbon
Acids
Water
acid
carbon
Temperature
Activated carbon
activated carbon
effect
removal
water industry
Disinfection
Public health
disinfection
water
Water quality
Byproducts
public health
Managers

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Water Science and Technology

Cite this

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Effects of EBCT and water temperature on HAA removal using BAC. / Wu, Hongwei; Xie, Yuefeng F.

In: Journal / American Water Works Association, Vol. 97, No. 11, 01.11.2005.

Research output: Contribution to journalReview article

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AU - Xie, Yuefeng F.

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AB - This article discusses the removal of a major group of disinfection by-products (DBFs) - haloacetic acids (HAAs) - in biologically active carbon (BAC) or acclimated granular activated carbon (GAC). Precursor removal has been the main control strategy for DBPs. Using BAC to remove preformed HAAs is a new concept. Although it is known that water temperature and empty bed contact time (EBCT) affect the removal of HAAs in BAC, this study was undertaken to gain a better understanding of how these parameters affect removal. The results suggest that a 10-min EBCT should be used for 4°C waters and a 5-min EBCT should be used for waters at 10°C or higher. The results of this study could help utility managers better control HAAs by improving the general understanding of the effects of water temperature and EBCT. Information on HAA removal could be used to provide an alternative technique for HAA control. Water suppliers could use the information to improve the design and operation of GAC filters to achieve an effective reduction of HAAs. Enhanced HAA removal could help the water industry better comply with DBP regulations, improve water quality, and protect public health.

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