Monitoring the post-irradiation E. coli survival patterns in environmental water matrices: Implications in handling solar disinfected wastewater

Autor: Antoni Escalas-Cañellas, Stefanos Giannakis, Ana Isabel Merino Gamo, Efthymios Darakas, Cesar Pulgarin
Přispěvatelé: Universitat Politècnica de Catalunya. Departament d'Enginyeria Química, Universitat Politècnica de Catalunya. ENMA - Enginyeria del Medi Ambient
Rok vydání: 2014
Předmět:
Enginyeria química::Química del medi ambient::Química de l'aigua [Àrees temàtiques de la UPC]
FECAL INDICATOR BACTERIA
General Chemical Engineering
E. coli survival
DRINKING-WATER
Aigües residuals -- Depuració
Population
Regrowth
Bacterial population
Industrial and Manufacturing Engineering
Environmental influence
Aqueous matrices
Environmental water
Escherichia coli
ENTERIC BACTERIA
Environmental Chemistry
Irradiation
education
Effluent
Escherichia coli (Bacteri)
education.field_of_study
Chemistry
Sewage--Purification
SALMONELLA-TYPHIMURIUM
SECONDARY EFFLUENT
Dilution
General Chemistry
DARK REPAIR
Solar disinfection
ULTRAVIOLET DISINFECTION
Enginyeria química::Impacte ambiental [Àrees temàtiques de la UPC]
Wastewater
Environmental chemistry
PLASTIC BOTTLES
E. COLI
SUNLIGHT INACTIVATION
Seawater
Zdroj: Recercat. Dipósit de la Recerca de Catalunya
Universitat Jaume I
UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
ISSN: 1385-8947
DOI: 10.1016/j.cej.2014.05.092
Popis: In this study, simulated solar disinfection of secondary effluent was followed by dark storage at different temperatures or different receiving water matrices. Escherichia coil illumination was followed by 3-day monitoring of the bacterial population and its adaptation in different temperature conditions in the dark. The subsequent survival was linked to the dose received during exposure to light, and results were obtained on the environmentally induced prolongation of survival, maintenance of population or excessive growth, at 4 degrees C, 20 degrees C and 37 degrees C, respectively. An additional set of experiments at 20 degrees C was subjected to dilution in E. coli-free synthetic wastewater, water from Lake Leman, (synthetic) seawater and Mili-Q water. Post-irradiation monitoring was also conducted, studying 50%, 10% and 1% dilution rates, and the results were attributed to the two parameters of dilution medium and dilution ratio. However, different responses were found based on the acquired dose during pre-treatment. This indicates the importance of the illumination prior to storage, and the preference of bacteria in some matrices over the others. Survival was linked to initial population, dose, dilution and medium; shorter illumination times are to be considered according to the receiving water matrix. (C) 2014 Elsevier B.V. All rights reserved.
Databáze: OpenAIRE
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