TY - JOUR
T1 - Inactivation of bacteria and murine norovirus in untreated groundwater using a pilot-scale continuous-flow intense pulsed light (IPL) system
AU - Yi, Ji Yoon
AU - Lee, Na Hye
AU - Chung, Myong Soo
N1 - Funding Information:
This research was supported by a grant ( 10162KFDA995 ) from the Korean Ministry of Food & Drug Safety and a grant ( 313031-3 ) from the High Value-added Food Technology Development Program, Ministry of Agriculture, Food and Rural Affairs .
Publisher Copyright:
© 2015 Elsevier Ltd.
PY - 2016/3/1
Y1 - 2016/3/1
N2 - The objective of this study was to characterize the inactivation effects of a pilot-scale continuous-flow intense pulsed light (IPL) system on microorganisms in untreated groundwater used in the food industry. The inactivation effects of laboratory- and pilot-scale IPL systems on murine norovirus (MNV), a human norovirus surrogate, were also investigated. Flow rates of 40, 32, 20 and 12 l/min were tested (corresponding to 89, 113, 179, and 290 s of treatment time in a chamber, respectively). A 290-s pilot-scale IPL treatment at an energy dose of 14.02 J/cm2 resulted in a 4.79-log reduction of Escherichia coli C600 in water with an initial count of 105-106 CFU/ml, while a 270-s treatment at an energy dose of 13.05 J/cm2 resulted in a 2.91-log inactivation of aerobic and facultative anaerobic heterotrophs in untreated groundwater with the initial count of 4.5 × 104 CFU/ml. An 89-s treatment at a dose of 4.30 J/cm2 resulted in a 3.35-log inactivation of MNV in water with the initial count of 103-104 PFU/ml. The energy dose and the inactivation level showed linearity for this system. These trends should form the basis of a large-scale IPL-based water management system with improved energy efficiency.
AB - The objective of this study was to characterize the inactivation effects of a pilot-scale continuous-flow intense pulsed light (IPL) system on microorganisms in untreated groundwater used in the food industry. The inactivation effects of laboratory- and pilot-scale IPL systems on murine norovirus (MNV), a human norovirus surrogate, were also investigated. Flow rates of 40, 32, 20 and 12 l/min were tested (corresponding to 89, 113, 179, and 290 s of treatment time in a chamber, respectively). A 290-s pilot-scale IPL treatment at an energy dose of 14.02 J/cm2 resulted in a 4.79-log reduction of Escherichia coli C600 in water with an initial count of 105-106 CFU/ml, while a 270-s treatment at an energy dose of 13.05 J/cm2 resulted in a 2.91-log inactivation of aerobic and facultative anaerobic heterotrophs in untreated groundwater with the initial count of 4.5 × 104 CFU/ml. An 89-s treatment at a dose of 4.30 J/cm2 resulted in a 3.35-log inactivation of MNV in water with the initial count of 103-104 PFU/ml. The energy dose and the inactivation level showed linearity for this system. These trends should form the basis of a large-scale IPL-based water management system with improved energy efficiency.
KW - Escherichia coli C600
KW - Microbial inactivation
KW - Murine norovirus
KW - Pilot-scale intense pulsed light (IPL) system
KW - Untreated groundwater
UR - http://www.scopus.com/inward/record.url?scp=84950143975&partnerID=8YFLogxK
U2 - 10.1016/j.lwt.2015.10.027
DO - 10.1016/j.lwt.2015.10.027
M3 - Article
AN - SCOPUS:84950143975
SN - 0023-6438
VL - 66
SP - 108
EP - 113
JO - LWT - Food Science and Technology
JF - LWT - Food Science and Technology
ER -