Krones’ preform sterilisation using electron beamers from Hitachi Zosen

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PreBeam, Plan

In order to sterilise PET containers or preforms for aseptic lines, the beverage industry has so far predominantly used chemical processes featuring hydrogen peroxide or peracetic acid as the sterilising agent. But there’s an alternative: the newly developed Contipure AseptBloc E from Krones, when sterilising the preforms, renders germs harmless by means of accelerated electrons – an innovative method that, with a killing rate of log 6, is proving particularly effective.

Krones AG is here collaborating with the Japanese company Hitachi Zosen, in order to synergise the experience accumulated by this prestigious vendor of electron-beam systems with its own specialised knowledge of mechanical engineering.

Contipur AseptBloc E treats the preforms in two steps: first of all, the exterior is sterilised by means of a full-coverage electron emitter, then the interior with rod-shaped electron emitters, developed specifically for this application. The electron emitters’ power consumption lies at a very low level, which significantly increases the energetic efficiency of sterilisation and reduces overall power consumption.

The performative capabilities of the sterilisation system Krones has patented are currently being tested at a German beverage bottler under production conditions. The aim is to use the system in future as standard in aseptic systems in the Asian-Japanese region.

With the new technology, the Contipure AseptBloc E treats the preforms in two steps. In the first, the exterior gets sterilised by means of a full-coverage electron emitter, then the interior with rod-shaped electron emitters.