This a filtration process where pores size in membranes is closer to the size of particles. This is used to remove the microorganisms, viruses, bacteria and inacceptable solids during the product processing, for instance milk and water.

– This is a filtration process where pores size in membranes is closer to the size of particles. This is usually few or few tens of nanometers. The size of the specific particles should significantly exceed the size of the solvent particles. Ultrafiltration is a process where the big size particles are hold on by the membrane and a solvent together with the small particles pass through the membrane.

– The force thanks to which this fractionation process is moving is a high hydraulic pressure created in the solution. Ultrafiltration enable to separate the solution and gas mixture into chemical substances / ions and elements. Usually the ultrafiltration needs to apply a high pressure.

– In case the pore size in the membrane is smaller than 2 nanometers this separation process is called ‘nanofiltration’ and when the pores are even smaller then it’s called a ‘reverse osmosis’. When the pore size is bigger than 100 nanometers but not exceeding a few micrometers it’s called ‘microfiltration’.