Filtration systems

Hygienic and safe. Our filtration systems ensure the effective sterilisation or concentration of liquid products.

Membrane filtration systems - designed to meet your specific requirements

ELIQUO PROTEC can supply a full range of membrane filtration systems employing:

  • Microfiltration (MF)
  • Ultrafiltration (UF)
  • Nanofiltration (NF)
  • Reverse osmosis (RO)

Using membrane filtration, it is possible to separate or remove substances at low temperatures. Your requirements will determine which Membrane filtration system is right for you. We can prepare cost-effectiveness studies and calculate required membrane surface areas for you and also offer customised combined filtration systems.

All our filtration systems conform to EHEDG guideline requirements and provide for a high level of product and process safety. Other benefits are the long operating periods, minimal product loss on start-up and shut-down and minimal cleaning and maintenance needs.

Practical example -the processing of ESL milk using microfiltration

Our processes and techniques:

Microfiltration (MF)
A wide range of liquid foodstuff products can be processed using microfiltration. The largest pore size of filters is in the range 0.1 - 0.5 µm and these will separate macromolecules (fat, bacteria and selected proteins). Microfiltration is principally used for the sterilisation of products (e.g. during the production of ESL milk) and for the separation and fractionation of liquid proteins.

Ultrafiltration (UF)
The transition between MF and UF is fluid in the 0.1 µm pore range, although the separation threshold of UF is considerably smaller. Ultrafiltration is mainly used for the concentration of proteins, the removal of minerals and substances in solution and the purification of liquids.

Nanofiltration (NF)
By means of nanofiltration, it is possible to selectively separate lactose and mineral salts. Captured are molecules with a size of 0.1 - 5 kDa. Separation characteristics are determined by the different molecular weights, diffusion and charge properties. Nanofiltration is used for the standardisation of milk products, for whey processing, for the demineralisation of liquids and the separation of minerals.

Reverse osmosis (RO)
By means of reverse osmosis it is possible to concentrate liquids by removing water at pressures of 20 - 80 bar. The industry uses reverse osmosis to prepare concentrates of milk, whey and juices, to reduce waste water contamination and to prepare process water.


ESL system

35,000 l/h


  • output of 35,000 l/h
  • operating times up to 12 h
  • High speed tubular heat exchanger
  • double loop ceramic filtration system
  • continuous treatment of retentate by means of indirect and/or direct processing
  • high temperature cream processor
  • online standardisation
  • 200,000 litres capacity sterile tank storage

The advantages of membrane filtration

  • low exposure of product to thermal effects
  • pure filtered milk
  • can be integrated in existing thermal processing systems
  • flavour of resultant product hardly differs from that of fresh milk
  • no negative effects on physiological product characteristics (vitamin content, etc.)
  • low operating costs, positive effects on minimum shelf life

Syndicat Intercommunal, Step Bettembourg

Sep. 2007 I. BA/ June 2009

Contract value
EUR 36.5 million