To prevent plugging or damaging of membranes by hard and sharp particles from the feed water, water needs to be pre-filtered before micro filtration or ultra filtration processes take place. A pre-treatment needs to be determined as soon as the composition of the wastewater is known. Pre-treatment is not only important for nano filtration and Reverse Osmosis processes, but also for the above-mentioned microfiltration and ultra filtration processes. Pre-treatment of water is very important when these filtration techniques are applied, because membrane fouling can easily disturb the purification process. Ultra filtration can also be applied for pre-treatment of water for nano filtration or Reverse Osmosis. The textile industry Protection of membranes.The metal industry (oil/ water emulsions separation, paint treatment).The pores of ultra filtration membranes can remove particles of 0.001 – 0.1 µm from fluids.Įxamples of fields where ultra filtration is applied are: Solid-liquid separation for pharmacies or food industries Ultra filtrationįor complete removal of viruses, ultra filtration is required.
Pre-treatment of water for nano filtration or Reverse Osmosis.Separation of bacteria from water (biological wastewater treatment).Cold sterilisation of beverages and pharmaceuticals.Micro filtration can be implemented in many different water treatment processes when particles with a diameter greater than 0.1 mm need to be removed from a liquid.Įxamples of micro filtration applications are: This is because viruses can attach themselves to bacterial biofilm. Only part of the viral contamination is caught up in the process, even though viruses are smaller than the pores of a micro filtration membrane. Microfiltration membranes remove all bacteria. Membranes with a pore size of 0.1 – 10 µm perform micro filtration. Micro filtration and ultra filtration are pressure-dependent processes, which remove dissolved solids and other substances from water to a lesser extend than nano filtration and Reverse Osmosis. Substances that are smaller than the pores of the membranes are partially removed, depending on the construction of a refuse layer on the membrane. Substances that are larger than the pores in the membranes are fully removed. The extent to which dissolved solids, turbidity and microrganisms are removed is determined by the size of the pores in the membranes. Phone: +31 152 610 900 filtration and ultra filtration Membrane technology The principle of micro filtration and ultra filtration is physical separation.Separation and Concentration Purification Request.Plant Inspection & Process Optimalisation.
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