INACTIVATION OF INDIGENOUS BACTERIA IN WATER BY OZONE AND CHLORINE.
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| Title: | INACTIVATION OF INDIGENOUS BACTERIA IN WATER BY OZONE AND CHLORINE. |
|---|---|
| Authors: | Joret, J. C.1, Mennecart, V.2, Robert, C.2, Compagnon, B.2, Cervantes, P.2 |
| Source: | Water Science & Technology. 1997, Vol. 35 Issue 11/12, p81-86. 6p. |
| Subjects: | Chlorine, Ozone, Water purification, Water quality management, Escherichia coli, Disinfection & disinfectants, Biological treatment of water, Sand filtration (Water purification), Flocculation in water purification |
| Abstract: | The aim of this study was to compare the level of removal and inactivation of indigenous bacteria during drinking water production as evaluated by culture techniques and epifluorescent microscopic counts of metabolically active bacteria (in situ respiring bacteria i.e. able to metabolise CTC: cyano 2,3-ditolyl tetrazolium chloride). Two sets of experiments were designed: a) bacterial counts through a full scale drinking water treatment plant (multibarrier treatment including coagulation-flocculation-settling, sand filtration, ozonation, biological GAC filtration, post-chlorination) and distribution system; b) benchscale disinfection studies in order to re-evaluate the C.t values necessary to inactivate laboratory grown E. coli or indigenous bacteria from water by ozone and chlorine. Main conclusions of this study are: a) significant amounts of in situ respiring bacteria (undetected by the classical culture techniques) are detected in finished water; b) the efficiency of ozone and chlorine recorded by microscopic counts of active bacteria is much less than supposed by classical enumerations of culturable bacteria; c) previous results reported in the literature may have largely overestimated the bactericidal efficiency of disinfectants used for producing drinking water. [ABSTRACT FROM AUTHOR] |
| Copyright of Water Science & Technology is the property of IWA Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 26926942 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: INACTIVATION OF INDIGENOUS BACTERIA IN WATER BY OZONE AND CHLORINE. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Joret%2C+J%2E+C%2E%22">Joret, J. C.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Mennecart%2C+V%2E%22">Mennecart, V.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Robert%2C+C%2E%22">Robert, C.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Compagnon%2C+B%2E%22">Compagnon, B.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Cervantes%2C+P%2E%22">Cervantes, P.</searchLink><relatesTo>2</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Water+Science+%26+Technology%22">Water Science & Technology</searchLink>. 1997, Vol. 35 Issue 11/12, p81-86. 6p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Chlorine%22">Chlorine</searchLink><br /><searchLink fieldCode="DE" term="%22Ozone%22">Ozone</searchLink><br /><searchLink fieldCode="DE" term="%22Water+purification%22">Water purification</searchLink><br /><searchLink fieldCode="DE" term="%22Water+quality+management%22">Water quality management</searchLink><br /><searchLink fieldCode="DE" term="%22Escherichia+coli%22">Escherichia coli</searchLink><br /><searchLink fieldCode="DE" term="%22Disinfection+%26+disinfectants%22">Disinfection & disinfectants</searchLink><br /><searchLink fieldCode="DE" term="%22Biological+treatment+of+water%22">Biological treatment of water</searchLink><br /><searchLink fieldCode="DE" term="%22Sand+filtration+%28Water+purification%29%22">Sand filtration (Water purification)</searchLink><br /><searchLink fieldCode="DE" term="%22Flocculation+in+water+purification%22">Flocculation in water purification</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The aim of this study was to compare the level of removal and inactivation of indigenous bacteria during drinking water production as evaluated by culture techniques and epifluorescent microscopic counts of metabolically active bacteria (in situ respiring bacteria i.e. able to metabolise CTC: cyano 2,3-ditolyl tetrazolium chloride). Two sets of experiments were designed: a) bacterial counts through a full scale drinking water treatment plant (multibarrier treatment including coagulation-flocculation-settling, sand filtration, ozonation, biological GAC filtration, post-chlorination) and distribution system; b) benchscale disinfection studies in order to re-evaluate the C.t values necessary to inactivate laboratory grown E. coli or indigenous bacteria from water by ozone and chlorine. Main conclusions of this study are: a) significant amounts of in situ respiring bacteria (undetected by the classical culture techniques) are detected in finished water; b) the efficiency of ozone and chlorine recorded by microscopic counts of active bacteria is much less than supposed by classical enumerations of culturable bacteria; c) previous results reported in the literature may have largely overestimated the bactericidal efficiency of disinfectants used for producing drinking water. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Water Science & Technology is the property of IWA Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.2166/wst.1997.0714 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 6 StartPage: 81 Subjects: – SubjectFull: Chlorine Type: general – SubjectFull: Ozone Type: general – SubjectFull: Water purification Type: general – SubjectFull: Water quality management Type: general – SubjectFull: Escherichia coli Type: general – SubjectFull: Disinfection & disinfectants Type: general – SubjectFull: Biological treatment of water Type: general – SubjectFull: Sand filtration (Water purification) Type: general – SubjectFull: Flocculation in water purification Type: general Titles: – TitleFull: INACTIVATION OF INDIGENOUS BACTERIA IN WATER BY OZONE AND CHLORINE. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Joret, J. C. – PersonEntity: Name: NameFull: Mennecart, V. – PersonEntity: Name: NameFull: Robert, C. – PersonEntity: Name: NameFull: Compagnon, B. – PersonEntity: Name: NameFull: Cervantes, P. IsPartOfRelationships: – BibEntity: Dates: – D: 02 M: 05 Text: 1997 Type: published Y: 1997 Identifiers: – Type: issn-print Value: 02731223 Numbering: – Type: volume Value: 35 – Type: issue Value: 11/12 Titles: – TitleFull: Water Science & Technology Type: main |
| ResultId | 1 |
