PET Food Processing - March 2020 - 57

EQUIPMENT

KEY TO
KIBBLE
CONTROL
Preconditioners play a crucial role in delivering
consistent, safe and quality extruded pet foods.
By Jennifer Semple | jsemple@sosland.com

T

Today's trending pet food formulations featuring high
meat content and a broad range of ingredients are a
challenge to extrude. Preconditioners are a vital tool
delivering product consistency to the extrusion process.
"The preconditioner provides the environment to uniformly hydrate, heat and mix the food ingredients before beginning the cooking process," says Daniel Tramp,
technical sales, companion animal division, Wenger
Manufacturing, Inc., Sabetha, Kansas.
Preconditioning is a preliminary treatment of raw
materials before extrusion cooking to ensure a homogeneous pre-cooked mix on a continuous basis. "The
preconditioner hydrates, pre-heats and thoroughly mixes the raw material with injected fluids such as steam,
water, oil or slurries," explains Emmanuel Lavocat, food
& feed extrusion process engineer, Clextral, Tampa,
Florida. As formulations evolved, preconditioners were
developed "to respond to process requirements, improve
product quality and increase the capacity of the extrusion systems," he adds.

Delivering results
In high-volume processing, control of the process is
important. As more fresh, high-moisture-content ingredients are added to pet food formulations, it becomes
more challenging to uniformly mix the large volumes of
wet ingredients with the dry before transferring to the
extruder. Preconditioners help extruders have better
control of the finished product.

"By starting the cooking process in the preconditioner
by 'warming' the recipe before it enters the extrusion
barrel, the operator is able to reduce the amount of energy that needs to be transferred into the product while
in the extruder barrel," Tramp says. "This, in turn, allows
for improved control of the cooking step and the opportunity for increasing the consistency of the final product
attributes." Tramp points out that product flexibility is
also increased. "For example, the more homogenized the
mix is then the possibility for smaller particle size can be
present, which in turn can create unique final product
attributes that may be otherwise unattainable," he says.
Better process control can have a large impact on
overall process efficiency, but preconditioners can help
with the little things as well. "Rework is often driven by
fines creation, which is often most prevalent in non-homogenized product," says Adrian Martinez-Kawas, international project manager, Corporate Project Services,
a division of Wenger. "The homogenization that the preconditioner offers can have a positive direct effect on the
final product stability and structure."
Martinez-Kawas goes on to explain that the coefficient
of variation (CV) is a statistical number used to measure
how well a recipe has been mixed together. The lower
the CV, the more homogenized the mix. He says modern
preconditioners have taken steps to reduce the CV of a
mix. Specifically, the ability to have two mixing shafts
with independent speed, circumference and direction of
rotation has shown to improve the CV of a mix while

A preconditioner
continuously mixes
powder and liquid
ingredients and
replaces mechanical
energy with thermal
energy, which can
lead to lower overall
operating costs.
B├╝hler Group

www.petfoodprocessing.net | March 2020 | PET FOOD PROCESSING

57


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PET Food Processing - March 2020

Table of Contents for the Digital Edition of PET Food Processing - March 2020

PET Food Processing - March 2020
Contents
OFF THE LEASH - Dearth of data
TRENDS - Pets vs. planet
PLANT PROFILE - Recognized as Champions
FOOD SAFETY - Plan, test, improve, repeat
REGULATORY - Building on success
INGREDIENTS - Balanced benefits
FORMULATION - Understanding palatability
EQUIPMENT - Eye on dry
EQUIPMENT - Key to kibble control
OPERATIONS - 21st century pest control
PACKAGING - The singles scene
BEST IN SHOW
PATENTS TO PONDER
EVENTS
CLASSIFIED ADVERTISING
AD INDEX
SIT, STAY, READ
PET Food Processing - March 2020 - PET Food Processing - March 2020
PET Food Processing - March 2020 - PET Food Processing - March 2020
PET Food Processing - March 2020 - 2
PET Food Processing - March 2020 - 3
PET Food Processing - March 2020 - 4
PET Food Processing - March 2020 - Contents
PET Food Processing - March 2020 - OFF THE LEASH - Dearth of data
PET Food Processing - March 2020 - 7
PET Food Processing - March 2020 - 8
PET Food Processing - March 2020 - TRENDS - Pets vs. planet
PET Food Processing - March 2020 - 10
PET Food Processing - March 2020 - 11
PET Food Processing - March 2020 - 12
PET Food Processing - March 2020 - 13
PET Food Processing - March 2020 - 14
PET Food Processing - March 2020 - 15
PET Food Processing - March 2020 - PLANT PROFILE - Recognized as Champions
PET Food Processing - March 2020 - 17
PET Food Processing - March 2020 - 18
PET Food Processing - March 2020 - 19
PET Food Processing - March 2020 - 20
PET Food Processing - March 2020 - 21
PET Food Processing - March 2020 - 22
PET Food Processing - March 2020 - 23
PET Food Processing - March 2020 - 24
PET Food Processing - March 2020 - 25
PET Food Processing - March 2020 - 26
PET Food Processing - March 2020 - FOOD SAFETY - Plan, test, improve, repeat
PET Food Processing - March 2020 - 28
PET Food Processing - March 2020 - 29
PET Food Processing - March 2020 - 30
PET Food Processing - March 2020 - 31
PET Food Processing - March 2020 - 32
PET Food Processing - March 2020 - REGULATORY - Building on success
PET Food Processing - March 2020 - 34
PET Food Processing - March 2020 - 35
PET Food Processing - March 2020 - 36
PET Food Processing - March 2020 - INGREDIENTS - Balanced benefits
PET Food Processing - March 2020 - 38
PET Food Processing - March 2020 - 39
PET Food Processing - March 2020 - 40
PET Food Processing - March 2020 - 41
PET Food Processing - March 2020 - 42
PET Food Processing - March 2020 - FORMULATION - Understanding palatability
PET Food Processing - March 2020 - 44
PET Food Processing - March 2020 - 45
PET Food Processing - March 2020 - 46
PET Food Processing - March 2020 - 47
PET Food Processing - March 2020 - 48
PET Food Processing - March 2020 - EQUIPMENT - Eye on dry
PET Food Processing - March 2020 - 50
PET Food Processing - March 2020 - 51
PET Food Processing - March 2020 - 52
PET Food Processing - March 2020 - 53
PET Food Processing - March 2020 - 54
PET Food Processing - March 2020 - 55
PET Food Processing - March 2020 - 56
PET Food Processing - March 2020 - EQUIPMENT - Key to kibble control
PET Food Processing - March 2020 - 58
PET Food Processing - March 2020 - 59
PET Food Processing - March 2020 - 60
PET Food Processing - March 2020 - OPERATIONS - 21st century pest control
PET Food Processing - March 2020 - 62
PET Food Processing - March 2020 - 63
PET Food Processing - March 2020 - 64
PET Food Processing - March 2020 - 65
PET Food Processing - March 2020 - 66
PET Food Processing - March 2020 - PACKAGING - The singles scene
PET Food Processing - March 2020 - 68
PET Food Processing - March 2020 - 69
PET Food Processing - March 2020 - 70
PET Food Processing - March 2020 - 71
PET Food Processing - March 2020 - 72
PET Food Processing - March 2020 - 73
PET Food Processing - March 2020 - BEST IN SHOW
PET Food Processing - March 2020 - 75
PET Food Processing - March 2020 - PATENTS TO PONDER
PET Food Processing - March 2020 - 77
PET Food Processing - March 2020 - 78
PET Food Processing - March 2020 - EVENTS
PET Food Processing - March 2020 - CLASSIFIED ADVERTISING
PET Food Processing - March 2020 - AD INDEX
PET Food Processing - March 2020 - SIT, STAY, READ
PET Food Processing - March 2020 - 83
PET Food Processing - March 2020 - 84
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