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NANOFILTRATION UNIT
Nanofiltration is often used for treatment of
Drinking water:
Reduction of sulphate, chloride and fluoride.
Partial softening without use of regeneration chemical.
Industrial process water:
Partial softening and reduction of colour and humus from surface water in e.g. the iron and metal industry and paper mills.
Nanofiltration or reverse osmosis?
Reverse osmosis is typically used for demineralization of water, since this filtration method covers the widest field of application, see diagram. Nanofiltration, on the other hand, is applied to purposively reduce unwanted components in full or in part. Unlike reverse osmosis, nanofiltration applies a lower pressure, typically under seven bar, resulting in lower energy consumption compared with a reverse osmosis plant with the same productivity. |
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| Nanofiltration plant type 03-24, 24 m³/h, used for reduction of sulphate in ground water. |
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| Click on the diagram for large version. |
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You must also choose a NF-plant over a RO-plant, if you want a certain hardness, because a potential demineralization will make the water aggressive and lead to problems with corrosion in the supply network.
Designed for exactly your needs
EUROWATER offers a broad product range of fully automatic nanofiltration units – based on our well-known modular standard system, which makes it possible for us to combine an optimal plant for exactly your needs.
The technique behind
Nanofiltration (NF) is a membrane technology, which in its mode of operation and construction is very similar to reverse osmosis (RO). A nanofiltration membrane primarily restrains divalent ions and larger molecules. When it comes to the filtration process, a NF unit is placed between RO and UF – see the diagram.
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