Microfiltration membranes are for:
- removal of suspended solids and some microorganisms
- reduction of turbidity
- pretreatment for desalination techniques like NF or RO
Fields of application
- cold sterilisation in beverage and pharmaceutical industry
- filtration of fruit juices, wines and beers
- metal recovery in a form of colloids
- waste water treatment
- separation of oil-water emulsions
Microfiltration is a membrane separation process and is a physical separation method. Separation of particles is done according to their size: particles larger than the pores of the membrane are fully removed. Pore size of the microfiltration membranes is in the range of 0.1 – 10 micrometres. Microfiltration is used for the separation of suspended materials, algae, and some microorganisms. Organic and inorganic dissolved substances, as well as viruses are not separated.
Applied membranes can be flat-sheet, hollow fibre, tubular and spiral wound. The process can be pressurized or vacuum driven (submerged design).