The Introduction Of Membrane Filter
The Definition of Membrane Filter
The membrane water treatment is a solid-liquid separation technology. It is a technology that filters water through a membrane pore to trap impurities in the water without chemical changes and is easy to handle. However, due to the very small pore size, there are certain technical problems. A method of treating raw water with a biofilm is also used in feed water, but it is different from the filtration membrane separation technique. The membrane used for membrane separation is called membrane, while the membrane used for biofilm treatment is called film.
At present, the membrane filter is applied to seperate or enrich solutes in solution and it can also seperate colloidal suspensions. Its application field is constantly expanding.
The Working principle of Membrane Filter
It filters particles larger than the aperture on its surface.
The Classification of Membrane Filter
The classification principle of Hawach membrane filter is set by the the size of particles retained in raw water. There are four kinds of membrane holes in Hawach Scientific membrane filters: microfiltration filters (MF), ultrafiltration filters (UF), nanofiltration filters (NF) and reverse osmosis filters (RO).
The pore size of MF membranes is over 0.05um or more than 1000 molecular weight. And the membranes are to remove colloids and macromolecule organic compounds.
The moluclar weight of NF membranes’ pore size ranges from 100 to 1000. The membrane removes substances between UF and RO. These substances include trihalomethane, odor, chroma, pesticides, soluble organic matter, Ca, Mg and so on.
As for the RO membranes, its particle size is 10 moles. This membrane is mainly to remove salt and inorganic salt in the seperation process.