Pre-Treatment of natural organic matters containing raw water using coagulation

Ya Ling Cheng; Ruei Jyun Wong; Justin Chun Te Lin; Ch-Hpin Huang; Duu Jong Lee; Juin Yih Lai

doi:10.1080/01496391003666890

Pre-Treatment of natural organic matters containing raw water using coagulation

Ya Ling Cheng, Ruei Jyun Wong, Justin Chun Te Lin, Ch-Hpin Huang, Duu Jong Lee^*, Juin Yih Lai

^*Corresponding author for this work

Institute of Environmental Engineering

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

7 Scopus citations

Abstract

Coagulation is a commonly adopted process as a pretreatment step for minimizing membrane fouling. Three coagulants, polyaluminum chloride (PACl), alum, and FeCl₃ were tested under four mixing-settling schemes for turbidity and natural organic matters (NOM) removal. The organic matters in the raw waters were fractionated by high performance size exclusion chromatography (HP-SEC) system and were characterized using the excitation-emission matrix (EEM) fluorescence spectra. Sufficient rapid mixing and slow mixing or applying two-stage coagulation benefit turbidity removal using PACl or FeCl₃ under "electrostatic patch coagulation" (EPC) mechanism. The EPC mechanism is not efficient for alum coagulation. At higher coagulant doses, the NOM removal is not affected by mixing condition. Intensive rapid mixing alone benefits NOM removal using PACl or FeCl₃. Alum is a poor coagulant for NOM removal under EPC mechanism.

Original language	English
Pages (from-to)	911-919
Number of pages	9
Journal	Separation Science and Technology
Volume	45
Issue number	7
DOIs	https://doi.org/10.1080/01496391003666890
State	Published - 1 Apr 2010

Keywords

Charge neutralization
Coagulant
Mechanism
Organic matters

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title = "Pre-Treatment of natural organic matters containing raw water using coagulation",

abstract = "Coagulation is a commonly adopted process as a pretreatment step for minimizing membrane fouling. Three coagulants, polyaluminum chloride (PACl), alum, and FeCl3 were tested under four mixing-settling schemes for turbidity and natural organic matters (NOM) removal. The organic matters in the raw waters were fractionated by high performance size exclusion chromatography (HP-SEC) system and were characterized using the excitation-emission matrix (EEM) fluorescence spectra. Sufficient rapid mixing and slow mixing or applying two-stage coagulation benefit turbidity removal using PACl or FeCl3 under {"}electrostatic patch coagulation{"} (EPC) mechanism. The EPC mechanism is not efficient for alum coagulation. At higher coagulant doses, the NOM removal is not affected by mixing condition. Intensive rapid mixing alone benefits NOM removal using PACl or FeCl3. Alum is a poor coagulant for NOM removal under EPC mechanism.",

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T1 - Pre-Treatment of natural organic matters containing raw water using coagulation

AU - Cheng, Ya Ling

AU - Wong, Ruei Jyun

AU - Lin, Justin Chun Te

AU - Huang, Ch-Hpin

AU - Lee, Duu Jong

AU - Lai, Juin Yih

PY - 2010/4/1

Y1 - 2010/4/1

N2 - Coagulation is a commonly adopted process as a pretreatment step for minimizing membrane fouling. Three coagulants, polyaluminum chloride (PACl), alum, and FeCl3 were tested under four mixing-settling schemes for turbidity and natural organic matters (NOM) removal. The organic matters in the raw waters were fractionated by high performance size exclusion chromatography (HP-SEC) system and were characterized using the excitation-emission matrix (EEM) fluorescence spectra. Sufficient rapid mixing and slow mixing or applying two-stage coagulation benefit turbidity removal using PACl or FeCl3 under "electrostatic patch coagulation" (EPC) mechanism. The EPC mechanism is not efficient for alum coagulation. At higher coagulant doses, the NOM removal is not affected by mixing condition. Intensive rapid mixing alone benefits NOM removal using PACl or FeCl3. Alum is a poor coagulant for NOM removal under EPC mechanism.

AB - Coagulation is a commonly adopted process as a pretreatment step for minimizing membrane fouling. Three coagulants, polyaluminum chloride (PACl), alum, and FeCl3 were tested under four mixing-settling schemes for turbidity and natural organic matters (NOM) removal. The organic matters in the raw waters were fractionated by high performance size exclusion chromatography (HP-SEC) system and were characterized using the excitation-emission matrix (EEM) fluorescence spectra. Sufficient rapid mixing and slow mixing or applying two-stage coagulation benefit turbidity removal using PACl or FeCl3 under "electrostatic patch coagulation" (EPC) mechanism. The EPC mechanism is not efficient for alum coagulation. At higher coagulant doses, the NOM removal is not affected by mixing condition. Intensive rapid mixing alone benefits NOM removal using PACl or FeCl3. Alum is a poor coagulant for NOM removal under EPC mechanism.

KW - Charge neutralization

KW - Coagulant

KW - Mechanism

KW - Organic matters

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ER -

Pre-Treatment of natural organic matters containing raw water using coagulation

Abstract

Keywords

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