INDUSTRIAL-SCALE ELECTROPORATION OF PLANT MATERIAL

USING HIGH REPETITION RATE MARX GENERATORS

C. Schultheiss, H.-J. Bluhm, H.-G. Mayer*

Forschungszentrum Karlsruhe GmbH, Institut for Pulsed Power and Microwave Technology,

*Technology Transfer and Marketing, Postfach 3640, D-76021 Karlsruhe, Germany

M. Kern

Lutz & Kern, Saarstrasse 4, D-68753 Waghäusel-Kirrlach

 

Abstract

Electroporation of biological cells is meanwhile a well understood process. Two possible applications in industry are visible, namely decontamination of liquids from micrometer-scale microorganisms and electroporation of plant material to gain fruit juice and ingredients like starch. Electroporation meets the interest of industry since this procedure promises a lower energy consumption for denaturation than heat-treatment procedures. An other important point is to avoid heating of sensitive food products. A literature review shows that electric fieldstrength of the order of 100 kV/cm with microsecond or even sub-microsecond pulslength are under discussion [1]. This calls for pulse generators with several hundred kilovolts output voltage, pulse duration of typical microsecond, 1 kJ stored energy and a repetition rate of minimum 10 Hz. At the Forschungszentrum Karlsruhe Marx generators of this type have been developed mainly for underwater fragmentation purposes which can meet industrial demands. Even higher repetition rates up to 40 Hz seem possible, since the discharge mode is aperiodically. The mobile pilot device KEA supplied with a 300 kV pulse generator and a mechanical conveyance is able to treat plant raw material.

 

als Vortrag:

13th IEEE Pulsed Power Conf., Las Vegas, Nev., June 17-22, 2001