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dc.contributor.authorGiannakis, Stefanos
dc.contributor.authorDarakas, Efthymios
dc.contributor.authorEscalas Cañellas, Antoni
dc.contributor.authorPulgarin, César
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Química
dc.date.accessioned2014-10-08T14:57:04Z
dc.date.available2015-04-17T10:01:26Z
dc.date.created2014-09-15
dc.date.issued2014-09-15
dc.identifier.citationGiannakis, S. [et al.]. "Journal of photochemistry and photobiology A. Chemistry". 15 Setembre 2014.
dc.identifier.issn1010-6030
dc.identifier.urihttp://hdl.handle.net/2117/24310
dc.description.abstractIn this study, we systematically investigate solar disinfection of synthetic secondary wastewater, with the effort to decrypt the effects disinfection conditions have on post-irradiation bacterial regrowth in the dark. A full factorial design of 240 experiments was employed to investigate the effects of (i) exposure time (1, 2,3 and 4h), (ii) treatment temperature (20, 30, 40, 50 and 60 degrees C), (iii) initial bacterial concentration (10(3), 10(4), 10(5) and 10(6) CFU/mL) and (iv) sunlight intensity (0, 800 and 1200 W/m(2)) on Escherichia coli survival for a subsequent 48-h dark control period. The decisive implications treatment temperature inflicted in regrowth were monitored and interpreted within two temperature ranges, from 20 to 40 degrees C and 40 to 60 degrees C. In dark tests, bacterial populations presented initial moderate growths at 20-40 degrees C range, followed by intense regrowth. At 40-60 degrees C range, acute thermal inactivation without long-term regrowth predominated at 50 degrees C and was total at 60 degrees C, within the 4-h treatment period. Introduction of light resulted in higher removal rates or permanent inactivation for 800 and/or 1200 W/m(2), respectively. No post-treatment regrowth in the dark was observed after 24 and 48 h, in completely inactivated samples, and its demonstration, when observed, was well correlated to the bacterial numbers at the end of the disinfection period. Statistical observations on the transferred bacterial populations from day to day are also discussed in this paper. (C) 2014 Elsevier B.V. All rights reserved.
dc.format.extent11 p.
dc.language.isoeng
dc.subjectÀrees temàtiques de la UPC::Enginyeria química::Química del medi ambient::Química de l'aigua
dc.subjectÀrees temàtiques de la UPC::Desenvolupament humà i sostenible::Enginyeria ambiental::Tractament de l'aigua
dc.subject.lcshEscherichia coli
dc.subject.lcshSewage--Purification
dc.subject.otherSolar disinfection
dc.subject.otherWastewater
dc.subject.otherFull factorial design
dc.subject.otherE. coli
dc.subject.otherRegrowth
dc.subject.otherDark repair
dc.subject.otherESCHERICHIA-COLI
dc.subject.otherWASTE-WATER
dc.subject.otherUV DISINFECTION
dc.subject.otherSUBSEQUENT PHOTOREACTIVATION
dc.subject.otherPHOTOCATALYTIC INACTIVATION
dc.subject.otherULTRAVIOLET DISINFECTION
dc.subject.otherDRINKING-WATER
dc.subject.otherDNA-DAMAGE
dc.subject.otherRADIATION
dc.subject.otherREPAIR
dc.titleElucidating bacterial regrowth: effect of disinfection conditions in dark storage of solar treated secondary effluent
dc.typeArticle
dc.subject.lemacEscherichia coli (Bacteri)
dc.subject.lemacAigües residuals -- Depuració
dc.contributor.groupUniversitat Politècnica de Catalunya. ENMA - Enginyeria del Medi Ambient
dc.identifier.doi10.1016/j.jphotochem.2014.05.016
dc.rights.accessOpen Access
drac.iddocument15182104
dc.description.versionPostprint (published version)
upcommons.citation.authorGiannakis, S.; Darakas, E.; Escalas-Cañellas, A. [o Escalas, A.]; Pulgarin, C.
upcommons.citation.publishedtrue
upcommons.citation.publicationNameJournal of photochemistry and photobiology A. Chemistry
upcommons.citation.volume290
upcommons.citation.startingPage43
upcommons.citation.endingPage53


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