کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
624593 1455411 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of recirculation and initial concentration of microorganisms on the disinfection kinetics of Escherichia coli
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Effect of recirculation and initial concentration of microorganisms on the disinfection kinetics of Escherichia coli
چکیده انگلیسی

Disinfection studies with two pure strains of Escherichia coli ATCC 11229 and ATCC 15597 and real municipal wastewater were carried out at laboratory scale with a 10 W low pressure ultraviolet lamp in an ultraviolet (UV) disinfection system with recirculation of the liquid. A double first order kinetic model was established to fit the ultraviolet disinfection curves for the two microorganisms. This model implies that there are two subpopulations within the study population, one of which is sensitive to ultraviolet and another that is radiation-resistant. The kinetic model depends on the applied UV dose and is directly related to the initial bacterial concentration (No). It was possible to establish relationships between the kinetic parameters of the equation and the initial concentration, and so to predict the disinfection curves. The kinetic model was successfully fitted to a real wastewater sample, with the final microbial disinfection predicted as a function of the UV dose and No.


► We designed an experimental device for study of ultraviolet disinfection kinetic.
► We established a double first order kinetic model for E. coli disinfection.
► Interpretation of the kinetic parameters and their relation to the initial bacterial concentration was done.
► The presence of the tailing in the disinfection curve is due to the microbial resistance against ultraviolet radiation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Desalination - Volume 280, Issues 1–3, 3 October 2011, Pages 20–26
نویسندگان
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