Container decontamination ESL Filling bloc Whitebloc

Whitebloc is GEA’s most technologically advanced cold chain filling solution for sensitive beverages and liquid dairy products.

Whitebloc uses a hydrogen peroxide (H2O2) based decontamination technology for plastic bottles and caps that without requiring a water rinse, ensures maximum efficacy and reliability. The appropriate decontamination target for any kind of product – whether high or low acid – can be set according to the specific shelf-life required.

Bottles being decontaminated with hydrogen peroxide (H2O2)

Widok procesu na bazie nadtlenku H2O2 dla pojemników PET lub HDPE
Widok procesu na bazie nadtlenku H2O2 dla pojemników PET lub HDPE

In a two-phase process the bottles first enter a first carrousel and are sprayed with a hydrogen peroxide (H2O2) solution. All critical points are controlled automatically to ensure maximum decontamination efficacy.

After the ‘dosing’ phase, the ‘activating phase’ takes place in a second carrousel. Here, the bottles are flushed with hot sterile air that activates the H2O2, purges out peroxides and achieves a final peroxide concentration of less than 0.5 ppm. No water rinsing is required.

Clean Box: the key to ESL technology

The Clean Box is a physically isolated ultraclean environment. To prevent the bottles becoming contaminated after H2O2 treatment, the filler/capper zone is surrounded by a HEPA filter providing a sterile air flow with an ambient overpressure of 10 Pa.

The surfaces within the Clean Box are both accessible and easy to clean.


  • Effective and flexible, different decontamination targets – up to 5 log on A. brasiliensis and up to 3 log on B. atrophaeus – to meet the shelf-life requirements of a wide variety of products can be achieved
  • Available for a wide range of bottle formats, ranging from ’single serve’ 200 ml bottles to 1 US gallon format
  • Low maintenance: no moving parts or valves are installed on the two carrousels
  • Small footprint


Whitebloc ensures a decontamination target up to 5 log reduction on A. brasiliensis and up to 3 log reduction on B. atrophaeus upon completion of the ESL treatments. Whitebloc ESL is optimized for low to medium speed applications.


Sterilfoil VHP L: dry H2O2 technology for foil decontamination

Widok Sterilfoil VHP L

Sterilcap VHP L system is designed to handle both flat and sports caps, and offers a wide range of decontamination target levels to meet a variety of shelf-life requirements. During a preheating phase, the caps are exposed to an ideal temperature profile, which prevents condensation and ensures a very low level of residual peroxides (<0.05 ppm). Despite being a robust decontamination treatment, the Sterilcap is a gentle technology. The caps are maneuvered using only the VHP flow and gravity, which ensures that the slipping agent remains in place.

Sterilfoil VHP L: H2O2 technology for foil decontamination

Sterilcap VHP L: technologia suchego nadtlenku H2O2 do sterylizacji zakrętek
Sterilcap VHP L: technologia suchego nadtlenku H2O2 do sterylizacji zakrętek

Using H2O2-based decontamination, the Sterilfoil VHP L provides customers with a safe and hygienic sealing system for HDPE containers.

A compact sterilization chute allows simultaneous internal and external foil decontamination. The foils are pushed forward in a pressurized VHP flow through rails shaped to change the contact points during the process.