Mechanical Separation Division
Westfalia SeparatorMembraflowDynamic Filtration
Westfalia Separator and Membraflow
increased efficiency through a complete process chain
Centrifugal Separation Technologyand Dynamic Filtration from a Single Source
Westfalia Separator, with more than 50 salesand service companies worldwide, is holding a top position in the mechanical separation sector. Supported by 100 years of innovation,first-class engineering and extensive process-technological know-how, the company pro-duces centrifugal separators and decanters.
They are used for clarifying suspensions, separatingliquid mixtures with simultaneous removal of thesolids, but also for extracting active substances andfor concentrating and dewatering solid material. Inall, Westfalia Separator gathered experience with more than 2500 different applications. This enables the company to provide perfectly
customized solutions in terms of machine and process technology. Westfalia Separator recentlyextended its product portfolio by another future-oriented high-end technology: filtration with ceramic membranes.
As a specialist in dynamic filtration, Westfalia Separator Membraflow offers equipment tailoredprecisely to individual customer requirements. Westfalia Separator Membraflow develops, manufactures and installs ceramic membranes andcomplete membrane filtration systems. Thanks tomembrane filtration with ceramic elements, a solution is now available from a single source for many application areas requiring the parallelemployment of separators, decanters and membranefiltration.
Benefits to the user: intelligent technologies usingcentrifugation and membrane filtration, matched toeach other, provide a significant improvement inprocess line efficiency for example, in the foodindustry, biotechnology, the chemical industry or inwater and waste water treatment.
Since 1988, the company installed more than 1000 systems in a variety of sizes and for various applications, operating worldwide anddemonstrating the outstanding competence ofWestfalia Separator Membraflow.
High-tech manufacturing facility: the Westfalia Separator
Membraflow manufacturing facility brings together development,
production and logistics under one roof.
Individual solution Manufacturing Test stand operation Customer installation
Analysis ofthe problem
now offers complete
product clarification within
the process chain.
with decanters and
separators and ...
... dynamic filtration with
Filter Systems for Extreme Chemicaland Physical ConditionsTechnology and function of the ceramic membrane elements
The schematic drawing combined with an REM image show a cross-section through the support and membrane.
The multi-layer construction is clearly visible. The size of the particles determines the size of the spaces, the pores.
Where other filtration systems meet their limits,dynamic filtration with ceramic membrane elements opens new horizons.
The demands for maximum mechanical and chemicalstability, coupled with the lowest possible flow resistance are met by using a support made of pure-Al2O3 with a macroporous structure.
The membrane is applied to this support materialand consists of at least one, but usually several, layers of highly porous ceramic, with a precisely defined texture. The layer with the finest porositydetermines the filtration characteristics.
Westfalia Separator Membraflow offers a wideapplication-specific spectrum of membranes and element geometries, unmatched by the competition.Membranes with nominal pore diameters from 1 to 1400 nanometers are available.
Ceramic membranes are therefore almost predestinedfor use in the areas of ultra and microfiltration.
The outstanding properties offered by these typesof membrane elements are being successfully usedthroughout the world in Westfalia Separator Membraflow filter systems.
The Basis: the Ceramic Multi-Channel Element
The body made of highly porous ceramic contains numerous round channels runningparallel to its longitudinal axis. The membraneis mounted on the surface of these channels.
The suspension being clarified flows along the membrane in the channels with a portion of theflow passing through the membrane as the filtrate:this is then carried off by the support material.Thanks to the extremely high permeability, pressureloss during passage through the support is so low as to be negligible when compared to the pressure loss resulting from the passage through the extremely thin membrane.
A powerful filter element
Inert materialAcid and base resistantSolvent resistantCan be regeneratedNo problems with backflushingWear resistantLong service lifeOperationally safeHeat resistant can be sterilised with steam
Pore diameters of the ceramic membranes
Pore diameter Pore diameter Molecular weight
m nm kD
0.2 200 400
0.1 100 200
0.05 50 100
0.02 20 50
0.005 5 10
Round channels: Westfalia Separator Membraflow utilises a
channel form which provides optimum flow characteristics.
Matching the ceramic elements, modules and systems to
the individual requirements of the filtration task
High-performance materials manufactured in-house
Production of the filter elements, the modules, andthe individual membrane layers all takes place in-house. It is based on decades of know-how in thedevelopment and manufacture of high-performanceceramic materials made of aluminium oxide, zirconium oxide, titanium oxide and non-oxidizing,mechanically resistant materials.
Multi-channel filtration elements
During dynamic filtration, membrane elements areoperated with process-optimised flows across themembrane surface. A portion of this flow passesthrough the membrane and is carried off as the filtrate.
The optimal conditions for flow are achieved in acircular tube which is standard in all ceramic membrane filter elements. In practice, a number ofthese tubes are embedded in the coarsely poroussupport ceramic. This creates a multi-channel filterelement. The diameters of the channels are matchedto the requirements of the filtration process and liein the range of between 2 and 8 mm.
Application-specific module housings
Module housings serve to hold one or more membrane filter elements. The membrane is onlytechnically usable once it has been installed in sucha housing. The modules primary functions include:
Holding the working pressureEnsuring flow channelling of the raw solution, the permeate and the retentateChannelling the filtrateAllowing a controlled flow across the membrane
Geometry selection is always application-specific,based on the requirements. Module housings aremanufactured from stainless steel or other corrosionresistant materials.
Essential design features of the module housing
Elastic and secure sealing of the filter elementsFiltrate guidanceComplete evacuation of the filtrate side
Modules with variable membrane
surfaces, manufactured using
housings made of stainless steel,
titanium or other materials
Multifunctional Filter Technology Modules with Variable MembraneSurfaces
Analysis of the problem Individual solution Manu
Westfalia Separator Membraflow System Partner for Dynamic Filtration with Ceramic MembranesHigh-end technology and qualified employees
guarantee maximum customer satisfaction and the
highest level of product reliability
ufacturing Test stand operation Customer installation
Experienced specialists, innovative technology and process competence
From the analysis of the problem right up to finalinstallation Westfalia Separator Membraflow isable to offer integrated solutions from a single source.
Using innovative technologies combined with a unique level of process competence, Westfalias process engineers work with the customer to develop the most profitable separation process.Westfalia Separator Membraflow manufacturescompact and powerful filter equipment to cover awide spectrum of applications.
Analysis of the Problem
The process begins with the analysis of the problem. Working with the customer, the requirements are first defined and specified.Only a precise knowledge of the individualcomponents will produce a complete picture ofthe whole and lead to the initial solution, frequently this is combined with testing.
The detailed analytical data concerning the individualsubstances, such as their concentration, structure,size, chemical and physical behaviour during theprocess are all of fundamental significance. Anunderstanding of the molecular relationships permits the selection of the membrane offering theproper cut-off for the specific application inquestion. The results of orienting tests in the lab areconfirmed by additional field tests carried out on alarger scale which enables the secure scale-up toproduction equipment.
The equipment begins to take shape
Details come together and a system begins to takeshape. 3D visualisation on the computer helps makethe details apparent.
As early as in the problem
analysis stage, 3-D
help to illuminate the details.