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231224s2016 xx |||||o 00| ||eng c |
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|a 10.2166/wst.2015.447
|2 doi
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|a eng
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|a Gibson, J
|e verfasserin
|4 aut
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|a Chemical pretreatment of combined sewer overflows for improved UV disinfection
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|c 2016
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Completed 05.05.2016
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|a Date Revised 07.12.2022
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|a published: Print
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|a Citation Status MEDLINE
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|a The aim of this research was to better understand chemical pre-treatment of combined sewer overflows (CSOs) for subsequent ultraviolet (UV) disinfection. Approximately 200 jar tests were completed. Alum (Al2(S04)3·12H2O) resulted in a higher UV light transmission (UVT), and equivalent total suspended solids (TSS) removal, than ferric chloride (FeCl3). An alum dose of 20 mg/L increased the UVT of the raw CSO from 30 to 60% after settling. The addition of 100 mg/L of alum maximized UVT reaching approximately 85%. Flocculation did not increase UVT. However, it did improve the removal of TSS. Cationic polymers worked quickly compared with metal coagulants, but only reached a UVT of 60%. A high positive charge density on the polymer improved the removal of turbidity when compared with low charge, but did not affect UVT. If the goal is to maximise UVT, a very high alum dose may be preferred. If the goal is to minimize coagulant dose with moderate UV performance, cationic polymer at approximately 3 mg/L is recommended
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|a Evaluation Study
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Alum Compounds
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|a Cations
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|a Chlorides
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|a Ferric Compounds
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|a Polymers
|2 NLM
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|a Waste Water
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|a aluminum sulfate
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|a ferric chloride
|2 NLM
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|a Farnood, R
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|a Seto, P
|e verfasserin
|4 aut
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|i Enthalten in
|t Water science and technology : a journal of the International Association on Water Pollution Research
|d 1986
|g 73(2016), 2 vom: 23., Seite 375-81
|w (DE-627)NLM098149431
|x 0273-1223
|7 nnas
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| 773 |
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|g volume:73
|g year:2016
|g number:2
|g day:23
|g pages:375-81
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|u http://dx.doi.org/10.2166/wst.2015.447
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