Disinfection by-products management in high quality recycled water

Farre, Maria Jose, Doederer, Katrin, Gernjak, Wolfgang, Poussade, Yvan and Weinberg, Howard S. (2012) Disinfection by-products management in high quality recycled water. Water Science & Technology: Water Supply, 12 5: 573-579. doi:10.2166/ws.2012.031

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Author Farre, Maria Jose
Doederer, Katrin
Gernjak, Wolfgang
Poussade, Yvan
Weinberg, Howard S.
Title Disinfection by-products management in high quality recycled water
Journal name Water Science & Technology: Water Supply   Check publisher's open access policy
ISSN 1606-9749
1607-0798
Publication date 2012
Sub-type Article (original research)
DOI 10.2166/ws.2012.031
Volume 12
Issue 5
Start page 573
End page 579
Total pages 7
Place of publication London, United Kingdom
Publisher I W A Publishing
Collection year 2013
Language eng
Abstract During the production of high quality recycled water (HQRW) by means of reverse osmosis (RO) membrane filtration, chloramines (used to avoid biofouling) can generate disinfection by-products (DBPs) which could ultimately end up in the product water. This paper compares the fate of DBPs and organic halogen content generated during the production of HQRW under two different disinfection strategies employed prior to RO filtration: (i) in line-formed chloramines with a short contact time between secondary effluent and disinfectant versus (ii) pre-formed chloramines with a long contact time between secondary effluent and disinfectant. In general, pre-formed chloramines formed less trihalomethanes (THMs) in comparison to in line-formed chloramines even after a longer contact time. However, pre-formed chloramines still generated iodo-THMs (I-THMs) which are of concern since they are suspected to be more toxic than their chlorinated and brominated analogues. I-THMs were very effectively reduced by the advanced oxidation process placed after the membrane process. Chloramines also form other halogenated by-products whose identity is unknown. In this study, more than 95% of total organic halogen formed by chloramines was rejected by the RO membranes although the reduction of targeted low molecular weight DBPs was only around 50%. Specific rejections for individual DBPs vary, ranging from low for haloacetonitriles and high for haloketones.
Keyword Advanced water treatment plants
Chloramines
Disinfection by-products
Reuse
Reverse osmosis
Total organic halogen
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2013 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 7 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 6 times in Scopus Article | Citations
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Created: Thu, 13 Dec 2012, 15:25:48 EST by Dr Maria Farre Olalla on behalf of School of Chemical Engineering