Industrial Applications of PEF processing

Stefan Toepfl

We are the world’s leading provider of

Pulsed Electric Field Systems (PEF) to

the food, beverage

& scientific sectors.

Pulsed Electric Field ProcessingTexture softening

Structural modification

Pulsed Electric FieldsImpact on structure

Smoother cut and softer product

New amazing shapes are great with Elea PEF.

Treated sweet potato

Pulsed Electric FieldsCutting improvement – new shapes

Pulsed Electric FieldsImpact on structure

With PEF we can generate and accurately measure significant increases in yield,

energy and water savings and improve quality

THE BENEFITS OF PEF FOR FRENCH FRIES

LESS HEAT

LOW ENERGY USE REDUCED BLANCHING TIME LESS BROWNING

LESS OIL UPTAKELESS FRACTURE

Pulsed Electric FieldsSustainability

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Enhanced drying with PEFSweet potato and onion drying: reducing drying time and enhancing colour

Untreated PEF

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Enhanced freeze drying with PEF

Pulsed Electric Field ProcessingJuice extraction

Vaculiq low oxygen vacuum filter technology and Elea PEFYield increase and premium quality

0 2 4 6 8 10 12 14 16 18 20 22100

101

102

103

104

105

106

Mic

robi

al c

ount

(cf

u/m

l)

Storage time (days)

untreated: total aerobic count untreated: yeats and molds untreated: Lactic acid bacterie treated: total aerobic count treated: yeasts and molds treated: Lactic acid bacteria

detection limit

Shelf life increase of fresh, non-pasteurized smoothies and other heat sensitive liquids

Pulsed Electric Field ProcessingJuice Preservation

Pulsed Electric Field ProcessingJuice preservation

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Tube-in-tube heat exchanger. 1800 L/h. Heat recovery section included.

Pulsed Electric FieldsLine setup

Aseptic tankUNTREATED PRODUCT

Aseptic tankFINAL PRODUCT

PEF unit

TT

T Temperature control

Juice flow

Juice flow

35°C

4°C

55°C

4°C

4°C

*Temperatures shown here are illustrative

To filling line

Conditioning section

Cooling section

The heat recovery section uses the warm product to temper the cold product. Therefore less energy is required to condition the untreated juice and refrigerate the PEF juice.

Heat recovery section

20°C

20°C

Pulsed Electric FieldsLine setup

The electrical energy delivered to the product is partially transformed into thermal energy. This is a side effect which is less relevant than the electroporation produced during the treatment. The treatment time is in the range of microseconds. Although the temperature peak can reach more than 60°C in high intensity treatments, the thermal load compared to a traditional thermal pasteurisation is much lower.

Temperature/time profile

LTLT pasteurisation

PEF pasteurisation

Thermal energy load Pasteurization units

HTST pasteurisation

HPP

Thermal

HTSTPEF

HPP

Pulsed Electric FieldsLine setup

Pulsed Electric Field ProcessingBusiness impact

Pulsed Electric Field ProcessingJuice preservation

Pulsed Electric Field ProcessingBusiness impact

Pulsed Electric Field ProcessingBusiness impact

Pulsed Electric Field ProcessingBusiness impact

Electrical energy is stored in a capacitor and discharged into the treatment chamber

Dependent on switching technology and discharge circuit different pulse wave shapes can be obtained

Differences in peak power capabilities

RC-series PFN

Transformer Solid state Marx generator

Pulsed Electric Field ProcessingEquipment design

spark gap

capacitor

solid stateswitch

treatmentchamber

25 kV 25 kV

5 kV 5 kV 5 kV 5 kV

2.5 kV 25 kV

a

c d

b

We provide 3 customisable PEF systems

OUR MACHINES

CoolJuice™ process pumpable liquid and semi-liquid products

– juices, syrups, mash and pumpable non-foods.

SmoothCut™ systems process solid products such as roots, leaves, fruits and

vegetables.

Our trial batch system can treat solids and liquids for scientific and pilot scale

applications.

Quelle Fotos: DIL,

• PEF Pilot™• Batch system for use as

trial system• Tech Center / Lab• CE or UL/Ulc compliant• 10 l chamber volume• up to 300 kg/hr

Pulsed Electric FieldsEquipment

Pulsed Electric FieldsEquipment

SmoothCut™ 1Solids system• Capacity up to 6.000 kg/h• Belt width 320 mm• Systems for sinking and floating

products available

Pulsed Electric FieldsEquipment

SmoothCut™ 10Solids system• Capacity up to 13.000 kg/h• Belt width 320 mm• Systems for sinking and floating

products available

Pulsed Electric FieldsEquipment

SmoothCut™ 100cSolids system• Capacity up to 25.000 kg/h• Belt width 600 mm• Systems for sinking and floating

products available

Pulsed Electric FieldsEquipment

SmoothCut™ 1000Solids system• Capacity up to 60.000 kg/h• Belt width 800 mm• Systems for sinking and floating

products available

Equipment design

Equipment design

Pulsed Electric FieldsEquipment

CoolJuice™ 1000

CoolDairy™ 1000

Liquids system• Capacity up to 10.000 kg/h• DN 25 or 50 treatment chamber• Fully integrated HACCP module

Process validation

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1

2

3

4

5

6

7

8

52°C

53°C

55°C

45°C

45°C

46°C

35°C

35°C

Fibre-optic temperature measurement

Measuring pointElectric

Field5-25 kV/cm

Flow pattern2-60 cm/s

Temperature Field

35 – 70°C

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CCP 1 (T1)

CCP 2 (W, T2)

HACCP

Pulsed Electric FieldsInstalled systems

Pulsed Electric FieldsInstalled systems

Installed Systems

1 x 3000 l/h13 gpm

Pulsed Electric FieldsUpcoming commercial applications

New product development for snacks

Peeling improvement for tomato, prune, apricot etc.

Processing of tea, hemp for accelerated maturation

Microalgae, extraction of valuable ingredients

Drying enhancement

Casein conditioning as carrier for lipids

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www.elea-technology.comSneak preview into our pilot hall: http://elea-technology.com/360/

Our US distr

ibutor

FOOD PHYSICS

Boise, ID

www.food-physics.com