Application Of Alternative Food-Preservation Technologies To Enhance Food Safety And Stability

Indexed in: Chemical Abstracts, Scopus, EBSCO, Ulrich's Periodicals Directory

The book covers the applications of some alternative approaches for prolonging food shelf life. The book describes the role of food safety objectives, natural compounds (such as oils and microbial ...
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Alternative Non-Thermal Approaches: Microwave, Ultrasound, Pulsed Electric Fields, Irradiation

Pp. 143-160 (18)

DOI: 10.2174/978160805096311001010143

Author(s): Nilde Di Benedetto, Marianne Perricone, Maria Rosaria Corbo

Abstract

This chapter proposes a description of some non-thermal technologies (microwave, ultrasound, pulsed technologies, irradiation) as suitable tools to inactivate foodborne pathogens and spoiling microorganisms in heat-sensitive foods.

Ultrasound (US) is defined as pressure waves with a frequencies of 20 kHz or more; pulsed electric field (PEF) processing involves treating foods placed between electrodes by high voltage pulses in the order of 20- 80 kV/cm (usually for a couple of microseconds); ionizing irradiation occurs when one or more electrons are removed from the electronic orbital of the atom; and microwaves (MW) are defined as electromagnetic waves in the range of infrared (IR) and radio waves (RF) with a wavelength ranging from 1 mm to 1 m and operating at a frequency ranging from 300 Mhz to 300 Ghz. Each technique allows killing of vegetative microorganisms but fail until now, when applied alone, to destroy spores.

This chapter reports some practical applications of the proposed approaches in food industry and also focuses on their drawbacks and limitations.

Keywords:

Microwave, Ultrasound, Pulsed electric fields, Irradiation, Food applications of non-thermal approaches.