2015
DOI: 10.1080/09593330.2014.994040
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Virus Sensitivity Index of UV disinfection

Abstract: A new concept of Virus Sensitivity Index (VSI) is defined as the ratio between the first-order inactivation rate constant of a virus, ki, and that of MS2-phage during UV disinfection, kr. MS2-phage is chosen as the reference virus because it is recommended as a virus indicator during UV reactor design and validation by the US Environmental Protection Agency. VSI has wide applications in research, design, and validation of UV disinfection systems. For example, it can be used to rank the UV disinfection sensitiv… Show more

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Cited by 8 publications
(8 citation statements)
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“…Moreover, a very high dose (1 J/cm 2 ) of UV irradiation could not completely inactivate SMV1. Plaque assays suggested a 100% inactivation of SMV1 by the high (1-J/cm 2 ) UV irradiation dose and 98% inactivation by a lower UV irradiation dose (40 mJ/cm 2 , the European standard for the inactivation of most pathogens [31]). However, incubation of 50 ml ⌬C1C2 cells with 100 l of the high-dose UV-treated virus suspension resulted in the production of infectious SMV1 particles at 6 hpi, and a virus titer of 10 3 PFU/ml was observed by plaque assay at 8 to 10 hpi (data not shown).…”
Section: Smv1 Exhibits Three Distinct Association Modes Very Little mentioning
confidence: 99%
“…Moreover, a very high dose (1 J/cm 2 ) of UV irradiation could not completely inactivate SMV1. Plaque assays suggested a 100% inactivation of SMV1 by the high (1-J/cm 2 ) UV irradiation dose and 98% inactivation by a lower UV irradiation dose (40 mJ/cm 2 , the European standard for the inactivation of most pathogens [31]). However, incubation of 50 ml ⌬C1C2 cells with 100 l of the high-dose UV-treated virus suspension resulted in the production of infectious SMV1 particles at 6 hpi, and a virus titer of 10 3 PFU/ml was observed by plaque assay at 8 to 10 hpi (data not shown).…”
Section: Smv1 Exhibits Three Distinct Association Modes Very Little mentioning
confidence: 99%
“…Because the UV sensitivity of MS2 coliphage is at its highest close to the quasi-monochromatic light output of low-pressure mercury-vapor lamps commonly applied in UV reactors (253.7 nm), it is also used as indicator virus for the validation of UV reactors in the United States. Adenoviruses were among the most resistant viruses being tested by Hijnen et al (2006) and Tang and Sillanpää (2015). According to extensive data compiled by Kowalski (2009), in air, adenovirus, type-4 is the most susceptible to UV light (D-value = 0.8 mJ/cm 2 ), while Newcastle disease virus is the most resistant (D-value = 92.5 mJ/cm 2 ) (Table 5).…”
Section: Ultraviolet Lightmentioning
confidence: 98%
“…(15) implies that the ratio between the SBI of any bacteria to that of the reference bacteria, E. coli, is linearly proportional to its corresponding BSI. Here, linear proportionality holds regardless the inactivation rate, Log I.…”
Section: Inactivation Kineticsmentioning
confidence: 99%
“…(7) suggests that the ratio between the fluence differences required for any bacteria to that of E. coli is proportional to the ratio of their inactivation rate constants at the linear portion, if the same level inactivation rate of Log I is to be achieved for any bacteria. In this study, a new concept of bacteria sensitivity index (BSI) similar to virus sensitivity index [15] is defined as the ratio between the k i of any bacteria for the linear portion of the dose response curve to the k ir of the reference bacteria such as E. coli as follows:…”
Section: Theoretical Analysismentioning
confidence: 99%