May/June 2021 - 11

FROZEN PROCESSING
EQUIPMENT
Johnson. Produce could be frozen
individually rather in clumps, which
reduced overall waste. Additionally,
when produce is frozen slowly it
develops ice crystals. At the microscopic
level, these ice crystals are large enough
to break cell structure, which causes
fruits and vegetables to be mushy once
thawed, Johnson explained. IQF can
be done with Freon or ammonia, but
it works best with liquid nitrogen or
liquid CO2
, he said.
Johnson said Linde's CRYOLINE UPF
 Tomra's Nimbus BSI sorter.
a result of this boom, especially where
end users are looking to improve quality.
To maintain quality, product needs
to be frozen very quickly, Johnson
explained in a recent interview. Quick
freezing is especially important in
products such as strawberries where
there is a risk of clumping. Consumers
are drawn to IQF products as they can
use what they need and return the
rest to the freezer without creating
unnecessary waste.
When IQF first hit the marketplace
it solved a couple of problems, said
ultra performance flighted freezer is
an attractive option for processors as it
locks in moisture, preserves flavor and
ensures proper texture. The freezer
is ideal for processing higher value
products, such as berries, mango and
broccoli, said Johnson. It's also a good
option for pre-cooked products, such
as fire-roasted vegetables because it
stops the cooking process and freezes
product quickly.
PRODUCE PROCESS ING
11

May/June 2021

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