T90 as a tool for engineers: Interest and limits
Coastal management and water protection must provide acceptable water quality for shellfishing and tourist activities. To determine the impact of sewage on microbial water quality, engineers need to know the laws of bacterial reduction. In this study, experiments were performed with Escherichia coli...
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| Veröffentlicht in: | Water science and technology 1997, Vol.35 (11-12), p.277-281 |
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| creator | Guillaud, J.F. Derrien, A. Gourmelon, M. Pommepuy, M. |
| description | Coastal management and water protection must provide acceptable water quality for shellfishing and tourist activities. To determine the impact of sewage on microbial water quality, engineers need to know the laws of bacterial reduction. In this study, experiments were performed with Escherichia coli in the laboratory and in situ (Atlantic and Mediterranean coast) using diffusion chambers at several depths. T90 was calculated from culturable bacterial counts over time. Establishing an abacus integrating the depth of water impacted by sewage and turbidity enabled us to calculate T90 from daily sunlight illuminations. Results obtained by cultures minimise health risks and yet viability and cellular integrity of E. coli remain, even under intense sunlight stress. When direct viable count is used to calculate a VT90, the results are dramatically higher and show how necessary — and difficult — it is to develop a concept which takes account of better understanding of sanitary risks in impact studies. |
| doi_str_mv | 10.1016/S0273-1223(97)00272-2 |
| format | Article |
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To determine the impact of sewage on microbial water quality, engineers need to know the laws of bacterial reduction. In this study, experiments were performed with Escherichia coli in the laboratory and in situ (Atlantic and Mediterranean coast) using diffusion chambers at several depths. T90 was calculated from culturable bacterial counts over time. Establishing an abacus integrating the depth of water impacted by sewage and turbidity enabled us to calculate T90 from daily sunlight illuminations. Results obtained by cultures minimise health risks and yet viability and cellular integrity of E. coli remain, even under intense sunlight stress. When direct viable count is used to calculate a VT90, the results are dramatically higher and show how necessary — and difficult — it is to develop a concept which takes account of better understanding of sanitary risks in impact studies.</description><identifier>ISSN: 0273-1223</identifier><identifier>ISBN: 9780080433004</identifier><identifier>ISBN: 0080433006</identifier><identifier>EISSN: 1996-9732</identifier><identifier>DOI: 10.1016/S0273-1223(97)00272-2</identifier><identifier>CODEN: WSTED4</identifier><language>eng</language><publisher>New York NY: Elsevier Ltd</publisher><subject>Applied sciences ; Bacteria ; Bacteriological methods and techniques used in bacteriology ; Bacteriology ; Biological and medical sciences ; Coastal engineering ; Coastal management ; Coastal waters ; coastal zone ; Coastal zone management ; Diffusion chambers ; direct viable count ; Dye dispersion ; E coli ; Engineers ; Escherichia coil ; Exact sciences and technology ; faecal coliforms ; Fundamental and applied biological sciences. Psychology ; Health risks ; Mathematical analysis ; Microbiology ; Microorganisms ; Natural water pollution ; Pollution ; Seawaters, estuaries ; Sewage ; Sunlight ; T90 ; Tourist activities ; Turbidity ; Viability ; Water depth ; Water protection ; Water quality ; Water treatment and pollution</subject><ispartof>Water science and technology, 1997, Vol.35 (11-12), p.277-281</ispartof><rights>1997 International Association on Water Quality</rights><rights>1997 INIST-CNRS</rights><rights>Copyright IWA Publishing Jun 1997</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c310t-a9ba89ebbdff03800b6229abcefee313ed66f028dae6ce5c636bd5a2e69ed1063</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>309,310,314,780,784,789,790,4023,4049,4050,27922,27923,27924</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=2734646$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><contributor>Grabow, WOK</contributor><contributor>Morris, R</contributor><contributor>Jofre, J (eds)</contributor><creatorcontrib>Guillaud, J.F.</creatorcontrib><creatorcontrib>Derrien, A.</creatorcontrib><creatorcontrib>Gourmelon, M.</creatorcontrib><creatorcontrib>Pommepuy, M.</creatorcontrib><title>T90 as a tool for engineers: Interest and limits</title><title>Water science and technology</title><description>Coastal management and water protection must provide acceptable water quality for shellfishing and tourist activities. To determine the impact of sewage on microbial water quality, engineers need to know the laws of bacterial reduction. In this study, experiments were performed with Escherichia coli in the laboratory and in situ (Atlantic and Mediterranean coast) using diffusion chambers at several depths. T90 was calculated from culturable bacterial counts over time. Establishing an abacus integrating the depth of water impacted by sewage and turbidity enabled us to calculate T90 from daily sunlight illuminations. Results obtained by cultures minimise health risks and yet viability and cellular integrity of E. coli remain, even under intense sunlight stress. When direct viable count is used to calculate a VT90, the results are dramatically higher and show how necessary — and difficult — it is to develop a concept which takes account of better understanding of sanitary risks in impact studies.</description><subject>Applied sciences</subject><subject>Bacteria</subject><subject>Bacteriological methods and techniques used in bacteriology</subject><subject>Bacteriology</subject><subject>Biological and medical sciences</subject><subject>Coastal engineering</subject><subject>Coastal management</subject><subject>Coastal waters</subject><subject>coastal zone</subject><subject>Coastal zone management</subject><subject>Diffusion chambers</subject><subject>direct viable count</subject><subject>Dye dispersion</subject><subject>E coli</subject><subject>Engineers</subject><subject>Escherichia coil</subject><subject>Exact sciences and technology</subject><subject>faecal coliforms</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Health risks</subject><subject>Mathematical analysis</subject><subject>Microbiology</subject><subject>Microorganisms</subject><subject>Natural water pollution</subject><subject>Pollution</subject><subject>Seawaters, estuaries</subject><subject>Sewage</subject><subject>Sunlight</subject><subject>T90</subject><subject>Tourist activities</subject><subject>Turbidity</subject><subject>Viability</subject><subject>Water depth</subject><subject>Water protection</subject><subject>Water quality</subject><subject>Water treatment and pollution</subject><issn>0273-1223</issn><issn>1996-9732</issn><isbn>9780080433004</isbn><isbn>0080433006</isbn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1997</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNqFkMtKAzEUhoMXsNY-gjCgiC5GT5KZzMSNSPFSKLiwrkMmc0ZSppmaTAXf3vRCF25cHQLff86fj5BzCrcUqLh7B1bwlDLGr2VxA_HFUnZABlRKkcqCs0MykkUJUELGOUB2RAb7yAk5DWEOAAXPYEBgJiHRIdFJ33Vt0nQ-QfdpHaIP98nE9egx9Il2ddLahe3DGTludBtwtJtD8vH8NBu_ptO3l8n4cZoaTqFPtax0KbGq6qYBHrtUgjGpK4MNIqccayEaYGWtURjMjeCiqnPNUEisKQg-JFfbvUvffa1iB7WwwWDbaofdKigqsrzMyiKCF3_AebfyLnZTVMb_FyzP11S-pYzvQvDYqKW3C-1_FAW1tqo2VtVakZKF2lhVLOYud9t1MLptvHbGhn04RjKRrds-bDGMSr4tehWMRWewth5Nr-rO_nPoF5tRhws</recordid><startdate>1997</startdate><enddate>1997</enddate><creator>Guillaud, J.F.</creator><creator>Derrien, A.</creator><creator>Gourmelon, M.</creator><creator>Pommepuy, M.</creator><general>Elsevier Ltd</general><general>Pergamon Press</general><general>IWA Publishing</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7QH</scope><scope>7UA</scope><scope>7X7</scope><scope>7XB</scope><scope>88E</scope><scope>8FE</scope><scope>8FG</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>BKSAR</scope><scope>C1K</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>F1W</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>H96</scope><scope>H97</scope><scope>HCIFZ</scope><scope>K9.</scope><scope>L.G</scope><scope>L6V</scope><scope>M0S</scope><scope>M1P</scope><scope>M7S</scope><scope>PCBAR</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PTHSS</scope><scope>7TV</scope></search><sort><creationdate>1997</creationdate><title>T90 as a tool for engineers: Interest and limits</title><author>Guillaud, J.F. ; Derrien, A. ; Gourmelon, M. ; Pommepuy, M.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c310t-a9ba89ebbdff03800b6229abcefee313ed66f028dae6ce5c636bd5a2e69ed1063</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1997</creationdate><topic>Applied sciences</topic><topic>Bacteria</topic><topic>Bacteriological methods and techniques used in bacteriology</topic><topic>Bacteriology</topic><topic>Biological and medical sciences</topic><topic>Coastal engineering</topic><topic>Coastal management</topic><topic>Coastal waters</topic><topic>coastal zone</topic><topic>Coastal zone management</topic><topic>Diffusion chambers</topic><topic>direct viable count</topic><topic>Dye dispersion</topic><topic>E coli</topic><topic>Engineers</topic><topic>Escherichia coil</topic><topic>Exact sciences and technology</topic><topic>faecal coliforms</topic><topic>Fundamental and applied biological sciences. 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To determine the impact of sewage on microbial water quality, engineers need to know the laws of bacterial reduction. In this study, experiments were performed with Escherichia coli in the laboratory and in situ (Atlantic and Mediterranean coast) using diffusion chambers at several depths. T90 was calculated from culturable bacterial counts over time. Establishing an abacus integrating the depth of water impacted by sewage and turbidity enabled us to calculate T90 from daily sunlight illuminations. Results obtained by cultures minimise health risks and yet viability and cellular integrity of E. coli remain, even under intense sunlight stress. When direct viable count is used to calculate a VT90, the results are dramatically higher and show how necessary — and difficult — it is to develop a concept which takes account of better understanding of sanitary risks in impact studies.</abstract><cop>New York NY</cop><cop>Oxford</cop><pub>Elsevier Ltd</pub><doi>10.1016/S0273-1223(97)00272-2</doi><tpages>5</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0273-1223 |
| ispartof | Water science and technology, 1997, Vol.35 (11-12), p.277-281 |
| issn | 0273-1223 1996-9732 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_16458487 |
| source | EZB-FREE-00999 freely available EZB journals |
| subjects | Applied sciences Bacteria Bacteriological methods and techniques used in bacteriology Bacteriology Biological and medical sciences Coastal engineering Coastal management Coastal waters coastal zone Coastal zone management Diffusion chambers direct viable count Dye dispersion E coli Engineers Escherichia coil Exact sciences and technology faecal coliforms Fundamental and applied biological sciences. Psychology Health risks Mathematical analysis Microbiology Microorganisms Natural water pollution Pollution Seawaters, estuaries Sewage Sunlight T90 Tourist activities Turbidity Viability Water depth Water protection Water quality Water treatment and pollution |
| title | T90 as a tool for engineers: Interest and limits |
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