Impact of enhanced and optimized coagulation on removal of organic matter and its biodegradable fraction in drinking water

Völk, Christian; Bell, Kimberly; Ibrahim, E.; Verges, Debbie; Amy, Gary L.; LeChevallier, Mark W.

doi:10.1016/s0043-1354(00)00033-6

Cited by 236 publications

(117 citation statements)

References 21 publications

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“…15 Enhanced coagulation doses range from 5 to 150 mg/L FeCl3, 14 but more commonly range from 20 to 60 mg/L FeCl3. 4 In this study, coagulant doses ranging from 20 to 120 mg/L FeCl3 were tested in increments of 20 mg/L in an effort to optimize coagulant dose. Variations in polymer dose have not demonstrated a significant effect on DOC removal during enhanced coagulation; 1 therefore, polymer was applied at a constant dose of 0.4 mg/L.…”

Section: Jar Testingmentioning

confidence: 99%

Treatability of U.S. Environmental Protection Agency Contaminant Candidate List Viruses: Removal of Coxsackievirus and Echovirus using Enhanced Coagulation

Mayer

Ryu

Abbaszadegan

2008

Environ. Sci. Technol.

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Enhanced coagulation was evaluated for removal efficacy of coxsackievirus and echovirus (Contaminant Candidate List [CCL] enteroviruses), poliovirus, four potential surrogate bacteriophages, and dissolved organic carbon (DOC). Viruses and DOC were effectively removed using enhanced coagulation, with removals generally improving as dose increased and pH decreased. Optimal enhanced coagulation conditions of 40 mg/L FeCl3 and pH between 5 and 6.5 resulted in a maximum removal of 3.0 logs of coxsackievirus B6, 1.75 logs of echovirus 12, 2.5 logs of poliovirus 1, 1.8 logs of fr, 1.3 logs of phi-X174, 0.36 logs of MS2, 0.29 logs of PRD1, and 41% DOC. Bacteriophages fr and phi-X174 appear to be the most representative surrogates for the physical removal of coxsackievirus, while MS2 and PRD1 are more conservative. For echovirus, MS2 and PRD1 appear to be the most appropriate surrogates. The relative removal profiles of the enteroviruses (greatest removal of coxsackievirus followed by poliovirus and then echovirus) suggest that studies of the physical removal of poliovirus may be extended to the CCL enteroviruses. These results contribute to evaluations of the CCL and regulatory status of coxsackievirus and echovirus and aid in building a database of the treatment efficiencies of enteroviruses and their surrogates.

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Section: Jar Testingmentioning

confidence: 99%

Treatability of U.S. Environmental Protection Agency Contaminant Candidate List Viruses: Removal of Coxsackievirus and Echovirus using Enhanced Coagulation

Mayer

Ryu

Abbaszadegan

2008

Environ. Sci. Technol.

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“…20 Enhanced coagulation doses range from 5 to 150 mg/L FeCl3, 7 but are commonly in the range of 20−60 mg/L FeCl3. 5 Coagulant doses ranging from 0 to 120 mg/L FeCl3 were tested in increments of 20 mg/L in this study. Polymer was added at a constant dose of 0.4 mg/L.…”

Section: Jar Testingmentioning

confidence: 99%

“…The jar-testing protocol used throughout this study was based on the protocol described by Volk et al 5 Immediately following chemical addition, rapid mixing was initiated at 100 rpm for 1 min. Mixing was slowed for the flocculation stage, which consisted of two 10-min mixing periods at 40 and 20 rpm.…”

Section: Environmentalmentioning

confidence: 99%

Efficacy of Removal of CCL Viruses under Enhanced Coagulation Conditions

Abbaszadegan

Mayer

Ryu

et al. 2007

Environ. Sci. Technol.

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“…In general, the DOM in drinking water sources usually consists of a large range of different compounds, from largely aliphatic compounds to highly colored aromatics. Among these compounds, hydrophobic organic pollutants and high molecular weight (MW) fractions can be efficiently removed through a conventional treatment process (CTP), which consists of multi-step unit processes of coagulation, sedimentation and sand filtration [5,6]. However, the hydrophilic organic pollutants and low MW fractions are removed less efficiently than the hydrophobic and high MW fractions [4].…”

Section: Introductionmentioning

confidence: 99%

Characteristics of DOM and Removal of DBPs Precursors across O3-BAC Integrated Treatment for the Micro-Polluted Raw Water of the Huangpu River

Zhu

Lü

2013

Water

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Abstract:The aim of this study is to determine the impact upon dissolved organic matter (DOM) and removal of disinfection by-product (DBP) precursors of adding an ozone-biological activated carbon (O 3 -BAC) process after the conventional treatment process (CTP) using water from the Huangpu River in Shanghai, east China. Several metrics, including size fractionation, dissolved organic carbon (DOC) and trihalomethane formation potential (THMFP), were employed to accomplish this goal. In the raw water collected from the Huangpu River, the low molecular weight (MW) molecules (MW <3 kDa) were absolutely dominant in DOM, accounting for more than 55% of total DOC, and the DOM resulted in a high THMFP level of 472.91 ± 4.63 µg/L after an excessive chlorination. The CTP reduced high MW molecules (MW >10 kDa) by 61% and the low MW molecules (MW <3 kDa) by only 8%. The O 3 -BAC presented an accumulated DOC removal efficiency of approximately 50%, in particular, showing a high degree of the removal effectiveness of low MW molecules. Samplings from the CTP, ozone and BAC were subjected to excessive chlorination to determine the THMFP, and the measured concentrations were 211.89 ± 4.58 µg/L, 169.52 ± 4.55 µg/L, and 124.42 ± 4.27 µg/L, respectively. Therefore, coupled with the THMFP removal rate of 74%, the addition of the O 3 -BAC process after an existing CTP improved the water quality of the effluent, particularly, in terms of the improved reduction in the precursors of DBPs.

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Impact of enhanced and optimized coagulation on removal of organic matter and its biodegradable fraction in drinking water

Cited by 236 publications

References 21 publications

Treatability of U.S. Environmental Protection Agency Contaminant Candidate List Viruses: Removal of Coxsackievirus and Echovirus using Enhanced Coagulation

Treatability of U.S. Environmental Protection Agency Contaminant Candidate List Viruses: Removal of Coxsackievirus and Echovirus using Enhanced Coagulation

Efficacy of Removal of CCL Viruses under Enhanced Coagulation Conditions

Characteristics of DOM and Removal of DBPs Precursors across O3-BAC Integrated Treatment for the Micro-Polluted Raw Water of the Huangpu River

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