FACTORS AFFECTING THE ULTRAVIOLET INACTIVATION OF <i>ESCHERICHIA COLI</i> K12 IN APPLE JUICE AND A MODEL SYSTEM*

Journal of Food Process Engineering - Tập 29 Số 1 - Trang 53-71 - 2006
Edgar G. Murakami1, Lauren S. Jackson1, KEVIN MADSEN2, BRIAN SCHICKEDANZ2
1Food and Drug Administration National Center for Food Safety and Technology 6502 S. Archer Ave. Summit-Argo, IL 60501
2Illinois Institute of Technology National Center for Food Safety and Technology 6502 S. Archer Ave. Summit-Argo, IL 60501

Tóm tắt

ABSTRACT Ultraviolet (UV) light has been used successfully for years to sterilize water and was recently approved as an acceptable irradiation treatment for the processing of juice. Although there is considerable information on the efficacy of UV processing in the treatment of water, limited data are available on its efficacy in fluid food systems. The objectives of this work were to determine the effects of apple‐juice properties on the UV inactivation of Escherichia coli K12 and the interdependence of intensity and time on the efficacy of UV light. Results showed that absorbance (A) and suspended solids (SS) affected UV inactivation, while pH and dissolved solids did not. Concerning the interdependence of intensity and time, intensity levels can only be changed without sacrificing effectiveness at a limited range of intensity and dose levels. This means that the range of the intensity level of the actual UV reactor must be considered in process‐parameter determination.

Từ khóa


Tài liệu tham khảo

10.1080/10934529409376056

CHANG J., 1985, UV inactivation of pathogenic and indicator microorganisms, Appl. Environ. Microb., 49, 1361, 10.1128/aem.49.6.1361-1365.1985

CONACHER J.andZINNBAUER F.(No date).Aquionics brings ultraviolet technology advances to the North American food processing industry.Aquionics Inc. Erlanger KY.

DAVIS B., 1980, Microbiology

DOWNEY D., 1998, Development and validation of a general model for predicting biologic efficacy of UV reactors against plant pathogens in irrigation water, T. ASAE, 41, 849

HARRINGTON W., 1968, Reduction of the microbial population of apple cider by ultraviolet irradiation, Food Technol., 22, 117

10.1016/S0960-8524(99)00179-0

KISSINGER J.C., 1966, Developments in Industrial Microbiology, 318

10.2175/106143096X127910

MATTICK L., 1983, Composition of apple juice, J. Assoc. Off. Anal. Chem., 66, 1251

MURAKAMI E.G.andBATOR C.2000.Measurement of Absorbance Coefficient of Juices at the UV Range. Presented at the ASAE Annual Meeting Milwaukee WI July 9–12 ASAE Paper 006026.

OTT L., 1977, An Introduction to Statistical Methods and Data Analysis

PARKER J., 1995, Particle‐associated coliform in secondary effluents: Shielding from ultraviolet light disinfection, Water Environ. Res., 67

RYER A., 1977, Light Measurement Handbook

SCHOENEN D., 1996, The influence of inhomogeneous irradiation in UV disinfection – experimental findings and theoretical considerations, J. Water Supply Res. T., 45, 120

SCHOENEN D., 1993, Influence of geometrical parameters in different irradiation vessels on UV disinfection rate, Zbl. Hyg. Umweltmed., 194, 313

10.1111/j.1472-765X.1992.tb00727.x

10.1016/0273-1223(95)00256-M

SOMMER R., 1996, Increased inactivation of Saccharomyces cerevisiae by protraction of UV irradiation, Appl. Environ. Microb., 62, 1977, 10.1128/aem.62.6.1977-1983.1996

10.1016/S0273-1223(97)00244-8

10.1016/S0273-1223(98)00816-6

USFDA.2000. 21 CFR Part 179 Federal Register Vol. 65 No. 230 U.S. Food and Drug Administration Washington DC.

USFDA.2001.Hazard Analysis and Critical Control Point (HACCP): Procedures for the Safe and Sanitary Processing and Importing of Juice – Final Rule.Federal Register Vol. 66 No.13 U.S. Food and Drug Administration Washington DC.

WILLARD H., 1965, Instrumental Methods of Analysis

Thông tin
Thông tin xuất bản

Journal of Food Process Engineering

Tập 29 Số 1

53-71

Thông tin tác giả