Petfood Industry - December 2013 - 41

EXTRUSION

www.petfoodindustry.com

41

well over 90%. But when extrusion was conducted using the
MS3000 medium shear extruder, the results were similar to
those obtained on premium dog food.
RADIO FREQUENCY CO.'S NEW Macrowave pasteurization
systems are designed for conveyorized applications of bagged or
in bulk, dog biscuits, kibbles and other dry petfood products.
In a Macrowave heating system, an RF generator creates an
alternating electric field between two electrodes. The material to
be treated is conveyed through an electrode array where alternating energy causes polar molecules in the material to continuously reorient them to face opposite poles, much like the way
Geelen Counterflow BV
commissioned a major solar
array of over 600 solar
panels on the roofs of the
company's plant in Haelen,
Netherlands.

bar magnets react in an alternating magnetic field. The friction
resulting from this molecular movement causes the material to
heat both rapidly and uniformly throughout its entire mass.
Radio Frequency Co. has developed a line of energy-saving
Macrowave pasteurization systems that operate at 40MHz
where the depth of penetration and uniformity of heating are
optimized, thereby ensuring effective kill of Salmonella and
other harmful microbes, according to the company.
WENGER M ANUFACTURING CO.OFFERS a new highintensity preconditioner, with two independently driven shafts
that allow a wide range of capacities, mixing intensities and
retention times, according to the company. The relatively high
shaft speeds create radial mixing. Benefits of the independently driven shafts include uniform hydration and heating of
recipe, the potential of increased levels of process steam added
to the preconditioner, an increase in starch gelatinization and
the increased addition of meat slurries and other ingredients.
Wenger's thermal twin screw technology was developed
for process applications requiring an emphasis on thermal
cooking. Specially configured screw elements were complimented with a unique steam injection design to increase the
level of process steam incorporated into the extrudate. This
thermal extrusion process was coupled with the high-intensity
preconditioning technology to give a flexible extrusion system
that could vary the ratio of thermal and mechanical energy
inputs to optimize processing costs.
■

PetfoodIndustry

December 2013

www.petfoodindustry.com

41


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Petfood Industry - December 2013 - Cover1
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Petfood Industry - December 2013 - Contents
Petfood Industry - December 2013 - 2
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