Document Detail

Inactivation of Escherichia coli by ozone under bench-scale plug flow and full-scale hydraulic conditions.
MedLine Citation:
PMID:  16938335     Owner:  NLM     Status:  MEDLINE    
To determine the disinfection efficacy of ozonation, water companies can apply several disinfection calculation methods. The goal of this study was to evaluate the use of the T10 and continuous stirred tank reactor (CSTR) method to extrapolate inactivation rates of ozone sensitive microorganisms observed in laboratory tests to full-scale ozonation in drinking water treatment. The inactivation efficacy of the ozonation at the Amsterdam water treatment works was assessed by determining Escherichia coli concentrations in large volume samples before and after ozonation over a period of 1 year. The inactivation of dosed E. coli WR1 was tested in a bench-scale dissolved ozone plug flow reactor (DOPFR) on the same feed water as the full-scale ozonation in which a concentrated ozone solution in Milli-Q water was dosed. Applying the T10 method on the inactivation rates observed in the DOPFR strongly overestimated the inactivation capacity of the full-scale ozonation. The expected inactivation based on the CSTR method (LT2ESWTR) approached the observed inactivation at full-scale. Therefore, the CSTR method should be preferred to calculate inactivation of ozone sensitive organisms such as E. coli, viruses, Giardia and Campylobacter by full-scale ozonation.
P W M H Smeets; A W C van der Helm; Y J Dullemont; L C Rietveld; J C van Dijk; G J Medema
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2006-08-30
Journal Detail:
Title:  Water research     Volume:  40     ISSN:  0043-1354     ISO Abbreviation:  Water Res.     Publication Date:  2006 Oct 
Date Detail:
Created Date:  2006-09-12     Completed Date:  2006-12-28     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0105072     Medline TA:  Water Res     Country:  England    
Other Details:
Languages:  eng     Pagination:  3239-48     Citation Subset:  IM    
Faculty of Civil Engineering, Delft University of Technology, 2600 GA Delft, The Netherlands.
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MeSH Terms
Escherichia coli / drug effects*
Ozone / pharmacology*
Water Microbiology*
Reg. No./Substance:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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