Development of a Pilot-scale Pulse Electric Field system for Processing Liquid Foods

Oyetunji, Oluremilekun and Adeagbo, Opeyemi and Quadri, Faruq and Ishola, Felix and Mamudu, Angela Onose and Akinbod, Eniola (2020) Development of a Pilot-scale Pulse Electric Field system for Processing Liquid Foods. International Journal of Advanced Trends in Computer Science and Engineering, 9 (4). pp. 4251-4256. ISSN 2278-3091

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Abstract

Pulse-Electric Field (PEF) System can be described as a system that utilises high voltages applied at a specific interval and with a particular wave shape in treatment (inactivation and destruction of micro-organism cells) of liquid or solid food. Pulse-Electric Field food processing system reduces the drawbacks (such as deterioration in sensory values, energy contents, and freshness) of other methods significantly. To generate the high voltage needed for the treatment, a series of capacitors and diodes connected were used. Generation of the desired pulse shape, which is the square wave is achieved through ATmega-328 microcontroller. The pulse control system is made up of a button to vary the treatment time, the power switch and a 16x2 alphanumeric Liquid Crystal Display (LCD) which serves as visual feedback. For the evaluation of the fabricated system, bacteria were cultured using MacConkey agar solution and then diluted in orange juice which serves as samples of liquid food. From the samples prepared, the bacteria count is in order of 1.61x105CFU/mL before treatment, after treatment the count reduced to 1.01 x105CFU/mL and 2.10 x104CFU/mL concerning 1kHz and 2kHz pulse frequency used for the two samples treated.

Item Type:	Article
Uncontrolled Keywords:	Pulse-Electric Field, Food Preservation, Square wave, Field Intensity, Design
Subjects:	T Technology > TP Chemical technology
Divisions:	Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User:	Mrs Patricia Nwokealisi
Date Deposited:	16 Mar 2021 10:49
Last Modified:	16 Mar 2021 10:49
URI:	http://eprints.covenantuniversity.edu.ng/id/eprint/13897

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