Dairy Processing - November/December 2023 - 64

Proper filtration
Different processes prove there is no one-size-fits-all solution.
by Michael Gordon | dairyprocessing@sosland.com
P
roper filtration is essential in the dairy industry to ensure
the highest quality milk and ensures a superior product
for consumers.
When contaminants make their way through the
production line, the final product may be lost. Because of
this, membranes are one of the first lines of defense in dairy
product processing.
Membrane filtration is used for processes such as bacteria
and fat reduction, milk protein fractionation and casein
standardization. This process also plays a crucial role in
reducing or eliminating lactose and brining cheeses.
Since the introduction of membrane processing to the
dairy industry in the late 1960s, separation of dairy fluids
using semi-permeable membranes has been used to clarify,
concentrate and fractionate a variety of dairy products.
Additionally, the applications use for whey processing have
introduced new uses for uses for a once wasted by-product of
cheese making.
64 NOV-DEC 2023 | DAIRYPROCESSING.COM
VARIETY OF PROCESSES
In membrane filtration processing, a liquid contains several
dissolved or dispersed components of different molecular or
particle sizes. By using membranes with pores of different
sizes, it is possible to separate exact components into
separate liquid streams. Membrane filtration is a technology
that separates a liquid into two streams using a semipermeable
membrane.
A difference in pressure forces the components that are
smaller than the membrane pores through the membrane
as permeate. The remaining components are retained
as retentate.
Within the dairy product processing, there are four primary
membrane filtration processes used including microfiltration,
ultrafiltration, nanofiltration and reverse osmosis. The types
of milk and whey that can be concentrated by means of
each of these processes varies depending on the density of
the membrane.
GEA

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Dairy Processing - November/December 2023

Table of Contents for the Digital Edition of Dairy Processing - November/December 2023

Dairy Processing - November/December 2023 - Intro
Dairy Processing - November/December 2023 - 1
Dairy Processing - November/December 2023 - 2
Dairy Processing - November/December 2023 - 3
Dairy Processing - November/December 2023 - 4
Dairy Processing - November/December 2023 - 5
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