SOLUTIONS - MICRODYN-NADIR GmbH

ART
Food & Beverage
SOLUTIONS
The art to clear solutions

Beverages -
Proteins and more...
In recent years membrane filtration as a modern
and innovative technology has undergone significant
developments and meanwhile has moved into the
mainstream of the food processing market.
This was achieved by a wide variety of new products
adapted to the special needs of the food & dairy
industry.
Backed-up by the many years of experience and
developmental work in membrane filtration of her
parent companies - Hoechst AG and Akzo AG -
MICRODYN-NADIR contributes substantially to the
steady growth of membrane filtration becoming
a requirement in the food & beverage sector. Today
more effective membrane based separation units
for numerous food processes are available.
These help save energy and resources while
accomplishing better quality products.
MICRODYN-NADIR membranes match well with
the various pressure driven processing modes such
as cross-flow, semi- and dead-end operation under
regular and extreme conditions.
MICRODYN-NADIR supplies membranes made of
PP, PE, PES, PVDF and regenerated cellulose.
The main fields of application of our MF, UF,
and NF membranes in food & beverage industry
are the concentration or fractionation of proteins
and the clarification of fluids.
MICRODYN-NADIR membranes and modules are
used in dairy processes such as milk standardization,
concentration of milk and whey, cheese production
and brine clarification. Our products are
also successfully employed in the concentration
of liquid egg, gelatin, animal blood, starch, yeast,
as well as for the removal of micro-organisms
and cells etc.

SPIRA-CEL ®
A new generation of membrane products
Our new generation of membranes and elements
for the micro-, ultra- and nanofiltration provides better
performance and stability and is compliant with
FDA-specifications.
Our membranes are available in roll stock, flat sheet,
hollow fiber cartridges, tubular configuration and a wide
range of standardized or customized spiral wound
modules depending on the required membrane material
and molecular weight cut-off (MWCO).
Food & Dairy products
in general
Milk and whey
Cheese production
Cheese brine clarification
Liquid egg
Gelatine
Vinegar
Dextrose
Fruit juice
Wine
Food gums
Starches
Sweeteners
Fishbrine
Soymilk
CIP-fluids
MD 150
Application Features Benefits
Concentration
Standardization, recovery of proteins
and lactose
Protein concentration
Removal of micro-organisms like moulds,
yeast, pathogenic bacteria
Simultaneous processing of fermentation
and concentration
Concentration
One step clarification
Clarification
Clarification
One step clarification
Concentration and purification in one step
Concentration and recover
Clarification of syrups
Clarification
Concentration of proteins
Recovery of detergents and chemicals
Modules are available in sanitary and industrial versions
for high temperature and high pH conditions.
Our production processes meet the FDA standards,
and we demand all our suppliers to do so as well.
We assist our customers in process development with
our lab & pilot service. Our capabilities for field service
and short delivery times, also for custom products,
are more essential qualities of the MICRODYN-NADIR
organization.
Low energy consumption, no degradation and/or
heat deterioration of the product
Purified product, higher yield and easy protein recovery
High yield, fractionation of proteins
No alteration of the chemical composition of the brine,
no denaturation of the whey proteins
Purification and concentration in one step,
lysozyme separation
Higher quality
No use of diatomaceous earth
No use of diatomaceous earth, compact system design,
concentrate used as animal fodder
High juice recovery, no use of fining additives and
diatomaceous earth, upgrading of citrus juices
No prefiltration necessary, no use of fining agents,
filtersheets and diatomaceous earth
Continuous plant operation
Compact system design and low operational costs
Membrane resists high salt and pickles resistance.
Low initial investments
Energy savings, economical system design
Waste reduction

Shell and
embryo
removal
Concentrating liquid egg
by membrane filtration
Feed tank
Feed egg white
Simplified Flow Diagram
Dual in-line
Filters
Use for displacing product
Stage 1 Stage 2
The concentration of liquid egg is one important
application, in which membrane ultrafiltration has
proven to be a profitable process to obtain highest
product quality.
After egg breaking and the removal of shell and
embryo, the liquid egg is slowly fed into the membrane
filtration unit. This can either be built as
a single-stage system for batch operation or as a
multi-stage system which allows feed-and-bleed
processing. Good care is taken to protect the easily
damaged white of egg against destructive mechanical
or thermal stress during the process operation.
Shear stresses which may lead to irreversible
deterioration of the proteins are minimized by the
correct selection of the pumps. The use of positive
displacement pumps should be used to conserve
the valuable whip properties of the albumen.
Konzentrat
Permeate
Retentate
The process temperature has an essential influence
on the stability of the product, but is also of great
importance for the permeate flux. The latter strongly
depends on the membrane and the module type.
SPIRA-CEL ® -modules and membranes
by MICRODYN-NADIR with a MWCO ranging from
5 to 20 kDa enable the economical concentration
at temperatures in a range from 15 to 35°C, in which
denaturation or coagulation of proteins do not occur.
Depending on the membrane spacer the whole egg
can be concentrated up to 45% TS (Total Solids),
while the concentration of pure white of egg
is limited to 32% TS.
The advantage of these membranes is that proteins
are rejected while low molecular weight molecules
like glucose and salts can pass freely. Thus desalting
and concentration can be combined during the fermentation
process, which results in a shorter total
processing time. The UF-retentate is transferred
to a heat exchanger for further concentrating or fed
into a spray dryer to produce egg powder.
Occasionally, ultrafiltration is also used to recover
valuable egg components from detergent free wash
water, which is spent in large volumes for rinsing egg
processing machines. The extraction of lysozyme
is another application that benefits from the use
of UF-membranes with low MWCO.

Features
of Cross-Flow Filtration
Feed Flow
Permeate
In cross-flow filtration the fluid feed stream is fed
across the membrane. This concept supports turbulent
mixing of the fluid stream during the filtration
process and prevents the deposition of particles on
the membrane surface. Particles that have already
sedimented are flushed away.
Concentrate
Membrane
Formation of gel layers on the membrane at
the concentrate end during the filtration of proteins
is prevented by cross-flow filtration. This gel layer
strongly affects the membrane performance and
can only be removed by frequent rinsing.
Thus cross-flow filtration maintains stable permeate
fluxes over longer periods of time even with liquids
which are difficult to process.
All in all, the prevention of membrane fouling
and the enhanced fluid mixing lead to a better
membrane performance and ongoing stable
process during cross-flow filtration in comparison
to conventional dead-end processes.
The efficiency of the cross-flow filtration of liquids
is mainly determined by the correct choice of
membrane type construction of the module, main
parameters of the process, pressure and crossflow-velocity.
Furthermore the process performance
depends on many different factors.
MICRODYN-NADIR has long experience in the
evaluation of the influencing factors to optimize
membrane processes.

L@L Design • Getty Images
Support
Pre-Sales
Product information for membranes and modules
Technical advice and recommendations for application
Systems and processing advice
Process and method evaluation
Laboratory evaluation
After Sales-Service
Implementation of effective cleaning methods
Module cleaning
Evaluation of cleaning methods
Servicing of modules in operation
Please contact us for further information about
MICRODYN-NADIR products & applications.
Paint & Automotive
Pharma & Biotechnology
Environment
Chemical
Metal
Electronics
MICRODYN-NADIR GmbH
Rheingaustr. 190 - 196 • D-65203 Wiesbaden
Tel.: + 49 (0) 611- 962 - 6001 • Fax: + 49 (0) 611- 962 - 9237
info@microdyn-nadir.de • www.microdyn-nadir.de
MICRODYN TECHNOLOGIES INC • USA
Po Box 98269 • Raleigh NC 27624
Phone: + 1 919 872 - 9375 • Fax: + 1 919 872 - 9375
infoUSA@microdyn-nadir.de • www.microdyntech.com
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