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Non thermal pasteurization for orange juice using pulsed electric field

Pasteurization is an act or a process to minimize or eliminate all forms of life, particularly microorganisms in food products. Its aim is to reduce or eliminate the number of viable pathogens, which are likely to cause diseases. Pasteurization can be in the form of thermal and non-thermal methods....

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Main Authors:	Jambari, H., Azli, N. A., Rahmat, Z., Piah, M. A. M., Buntat, Y., Ramlan, N. H.
Format:	Article
Published:	American Scientific Publishers 2017
Subjects:	TK Electrical engineering. Electronics Nuclear engineering
Online Access:	http://eprints.utm.my/id/eprint/75236/ https://www.scopus.com/inward/record.uri?eid=2-s2.0-85023750579&doi=10.1166%2fasl.2017.8272&partnerID=40&md5=00a0156dd1d31d9dc2ab55cac7e9f38f
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spelling	my.utm.752362018-03-27T06:04:50Z http://eprints.utm.my/id/eprint/75236/ Non thermal pasteurization for orange juice using pulsed electric field Jambari, H. Azli, N. A. Rahmat, Z. Piah, M. A. M. Buntat, Y. Ramlan, N. H. TK Electrical engineering. Electronics Nuclear engineering Pasteurization is an act or a process to minimize or eliminate all forms of life, particularly microorganisms in food products. Its aim is to reduce or eliminate the number of viable pathogens, which are likely to cause diseases. Pasteurization can be in the form of thermal and non-thermal methods. Thermal pasteurization typically uses high heat and temperature to reduce or eliminate microorganisms. Although this method has been practiced and proven effective, the process is associated with many side effects. Due to this problem, new approaches using a non-thermal pasteurization to generate pulsed electric field (PEF) is proposed. In this paper, non-thermal sterilization using Cascaded H-Bridge Multilevel Inverter (CHMI) pulse power generator was evaluated in order to produce pulsed electric field in inactivating of microorganisms such as Saccharomyces cerevisiae and Escherichia coli in orange juice. The experimental set-up was conducted where an orange juice was placed inside the treatment chamber. The electrodes between the treatment chamber were applied with pulsed electric field up to 15 kV/cm by using the CHMI. The hardware development was implemented using MOSFET 2K3748 power devices and the gate signal generator was controlled by using dSPACE DS 1104. The experimental results show that, an output voltage of 1.2 kVp−p was effective to inactivate Escherichia coli and Saccharomyces cerevisiae. Thus, power consumption was decreased and energy was saved. The pulsed width of 1000 μs with repetitive rate of 50 Hz was generated from the hardware implementation. The results proved that the specifications of the experimental set-up meet the requirements for liquid food sterilization, particularly to inactivate Escherichia coli and Saccharomyces cerevisiae microorganisms in orange juice by using streaking plate techniques. American Scientific Publishers 2017 Article PeerReviewed Jambari, H. and Azli, N. A. and Rahmat, Z. and Piah, M. A. M. and Buntat, Y. and Ramlan, N. H. (2017) Non thermal pasteurization for orange juice using pulsed electric field. Advanced Science Letters, 23 (5). pp. 4082-4085. ISSN 1936-6612 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85023750579&doi=10.1166%2fasl.2017.8272&partnerID=40&md5=00a0156dd1d31d9dc2ab55cac7e9f38f DOI:10.1166/asl.2017.8272
institution	Universiti Teknologi Malaysia
building	UTM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknologi Malaysia
content_source	UTM Institutional Repository
url_provider	http://eprints.utm.my/
topic	TK Electrical engineering. Electronics Nuclear engineering
spellingShingle	TK Electrical engineering. Electronics Nuclear engineering Jambari, H. Azli, N. A. Rahmat, Z. Piah, M. A. M. Buntat, Y. Ramlan, N. H. Non thermal pasteurization for orange juice using pulsed electric field
description	Pasteurization is an act or a process to minimize or eliminate all forms of life, particularly microorganisms in food products. Its aim is to reduce or eliminate the number of viable pathogens, which are likely to cause diseases. Pasteurization can be in the form of thermal and non-thermal methods. Thermal pasteurization typically uses high heat and temperature to reduce or eliminate microorganisms. Although this method has been practiced and proven effective, the process is associated with many side effects. Due to this problem, new approaches using a non-thermal pasteurization to generate pulsed electric field (PEF) is proposed. In this paper, non-thermal sterilization using Cascaded H-Bridge Multilevel Inverter (CHMI) pulse power generator was evaluated in order to produce pulsed electric field in inactivating of microorganisms such as Saccharomyces cerevisiae and Escherichia coli in orange juice. The experimental set-up was conducted where an orange juice was placed inside the treatment chamber. The electrodes between the treatment chamber were applied with pulsed electric field up to 15 kV/cm by using the CHMI. The hardware development was implemented using MOSFET 2K3748 power devices and the gate signal generator was controlled by using dSPACE DS 1104. The experimental results show that, an output voltage of 1.2 kVp−p was effective to inactivate Escherichia coli and Saccharomyces cerevisiae. Thus, power consumption was decreased and energy was saved. The pulsed width of 1000 μs with repetitive rate of 50 Hz was generated from the hardware implementation. The results proved that the specifications of the experimental set-up meet the requirements for liquid food sterilization, particularly to inactivate Escherichia coli and Saccharomyces cerevisiae microorganisms in orange juice by using streaking plate techniques.
format	Article
author	Jambari, H. Azli, N. A. Rahmat, Z. Piah, M. A. M. Buntat, Y. Ramlan, N. H.
author_facet	Jambari, H. Azli, N. A. Rahmat, Z. Piah, M. A. M. Buntat, Y. Ramlan, N. H.
author_sort	Jambari, H.
title	Non thermal pasteurization for orange juice using pulsed electric field
title_short	Non thermal pasteurization for orange juice using pulsed electric field
title_full	Non thermal pasteurization for orange juice using pulsed electric field
title_fullStr	Non thermal pasteurization for orange juice using pulsed electric field
title_full_unstemmed	Non thermal pasteurization for orange juice using pulsed electric field
title_sort	non thermal pasteurization for orange juice using pulsed electric field
publisher	American Scientific Publishers
publishDate	2017
url	http://eprints.utm.my/id/eprint/75236/ https://www.scopus.com/inward/record.uri?eid=2-s2.0-85023750579&doi=10.1166%2fasl.2017.8272&partnerID=40&md5=00a0156dd1d31d9dc2ab55cac7e9f38f
_version_	1643657006258585600
score	13.211869

Non thermal pasteurization for orange juice using pulsed electric field

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