Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 108-113 |
| Number of pages | 6 |
| Journal | LWT - Food Science and Technology |
| Volume | 66 |
| DOIs | |
| State | Published - 1 Mar 2016 |
Bibliographical note
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.
Keywords
- Escherichia coli C600
- Microbial inactivation
- Murine norovirus
- Pilot-scale intense pulsed light (IPL) system
- Untreated groundwater