Solid-Liquid Separation

Separation technology as a whole has an important role in both environmental and energy issues. Protection of the environment and the efficient utilisation of raw materials require sophisticated separation techniques.

New separation technologies and the basic research being conducted on them for the chemical and mining industries, which are among the most energy intensive activities in modern society, can also help provide solutions for future energy questions.

Solid-liquid separation is one of the most common chemical and mining unit operations, and it has traditionally been one of the main research topics in the LUT Chemical Separation Technology Laboratory.

A more energy-efficient future for solid-liquid separation

Due to rising energy prices and increasingly scarce water supplies it is essential to strive for stronger energy and water saving solutions in separation processes.

In addition, the quality requirements set for the final product of the separation processes are getting tougher, at the same time that new innovations (e.g. in bio-processes and nanotechnology) raise new performance challenges for separation technologies.

The main areas of liquid-solid separation research

  • Prediction of filter properties
  • Liquid - solid separation sub-processes
  • Development of experimental methods
  • Filter material and hardware research and development

Liquid-Solid Group research capabilities

Chemical engineering is well-known as an empirical science, and it requires the help of experimental work. To minimise the amount of experimental work the research team apply well proven principles of experimental design to their research.

For the scientific study of liquid-solid separation phenomena the research group has access to numerous types of laboratory and pilot scale equipment, which together with reliable analytical methods form the basis for modelling the phenomena.

Modelling and interpretation of the basic phenomena play a vital role in the research work. Although the basic phenomena of liquid-solid separation have been extensively studied, much remains undefined regarding the characterization of the interaction between filtration materials and slurries, bio-materials in filtrations, and mathematical modelling of different phenomena.

The research work consists of three main areas

  • Laboratory tests
  • Analyses
  • Modelling

Further information and the research group

Professor Antti Häkkinen, D.Sc. (Tech)
Tel. 040 354 3218

Post Doctoral Researcher Mikko Huhtanen, D.Sc. (Tech)


LUT School of Engineering Science
P.O. Box 20
FI-53851 Lappeenranta, Finland

Riina Salmimies
+358 45 631 0917

Lea Hannola
Vice Dean
+358 40 822 3982