Solid state pulsed power source for pulsed electric field and plasma treatment of food products

Generally, high grade products such as pulsed electric field (PEF) treated fruit juices are packaged after their preservative treatment. However, PEF treatment after packaging could avoid recontamination of the product and becomes feasible when electric field pulses of sufficient magnitude can be generated inside closed food containments. Microbial inactivation of 2 log10 was proved by using an electrically conductive plastic packaging material, and in this contribution it is shown that inactivation toward pasteurization level is achievable. Therefore, a series of microbial experiments with Lactobacillus plantarum at different energy levels were performed. The obtained microbial data with the plastic material have been compared with inactivation models from literature as well as with reference experiments. All treatments were done at~2.3 kV/mm, with treatment times between 10-600 ms, and the thermal load was below 38C. The maximum obtained microbial inactivation with the plastic packaging material was 5.9 log10 with a specific energy of 255 J/mL. PRACTICAL APPLICATIONSIn order to further minimize the risk of contaminating microorganisms, e.g., introduced during the packaging process, this new technology of pulsed electric field (PEF) treatment after packaging can be beneficial in reducing food safety incidents. This technique also makes hygienic packaging machines superfluous, which will reduce operational and investment costs. By proving that PEF inactivation through a plastic packaging material is possible, the first step toward PEF treatment after packaging has been taken. Important next steps toward industrial realization are extensive research on food grade conductive packaging films, PEF in-pack processing methodologies and microbial investigation of different microorganisms.

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“…A high‐voltage pulse generator, which is described by Prins et al . (2001), was used to generate pulses with amplitude ( U ) of ∼6 kV.…”

Section: Methodsmentioning

confidence: 99%

TOWARD 6 log₁₀ PULSED ELECTRIC FIELD INACTIVATION WITH CONDUCTIVE PLASTIC PACKAGING MATERIAL

Roodenburg¹,

Haan²,

Ferreira³

et al. 2011

J Food Process Engineering

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“…18.29 [44]. With this design, it is possible to adjust the pulses in both directions (positive and negative) with an amplitude of up to 10 kV.…”

Section: Food Sterilizationmentioning

confidence: 99%

IGBT Applications

Baliga

2015

The IGBT Device

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“…The pulse generator, which is described by Prins et al (2001), has a bi-polar stacked IGBT topology, however only pulses with positive polarity were used for the experiments described. Electrical measurements were carried out with a digital oscilloscope from Yokogawa (model DL-1740).…”

Section: Experimental Set-upmentioning

confidence: 99%

Conductive plastic film electrodes for Pulsed Electric Field (PEF) treatment—A proof of principle

Roodenburg

Haan

Boxtel

et al. 2010

Innovative Food Science & Emerging Technologies

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Solid state pulsed power source for pulsed electric field and plasma treatment of food products

Cited by 11 publications

References 4 publications

TOWARD 6 log₁₀ PULSED ELECTRIC FIELD INACTIVATION WITH CONDUCTIVE PLASTIC PACKAGING MATERIAL

TOWARD 6 log₁₀ PULSED ELECTRIC FIELD INACTIVATION WITH CONDUCTIVE PLASTIC PACKAGING MATERIAL

IGBT Applications

Conductive plastic film electrodes for Pulsed Electric Field (PEF) treatment—A proof of principle

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Solid state pulsed power source for pulsed electric field and plasma treatment of food products

Cited by 11 publications

References 4 publications

TOWARD 6 log10 PULSED ELECTRIC FIELD INACTIVATION WITH CONDUCTIVE PLASTIC PACKAGING MATERIAL

TOWARD 6 log10 PULSED ELECTRIC FIELD INACTIVATION WITH CONDUCTIVE PLASTIC PACKAGING MATERIAL

IGBT Applications

Conductive plastic film electrodes for Pulsed Electric Field (PEF) treatment—A proof of principle

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Product

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TOWARD 6 log₁₀ PULSED ELECTRIC FIELD INACTIVATION WITH CONDUCTIVE PLASTIC PACKAGING MATERIAL

TOWARD 6 log₁₀ PULSED ELECTRIC FIELD INACTIVATION WITH CONDUCTIVE PLASTIC PACKAGING MATERIAL