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water line tracer wireNanofiltration system have pores with a size of around 1nm. Nanofiltration system are qualified based on their retention of crammed and also unloaded particles. The retention of a Nanofiltration membrane layer can be identified via experimental filtering tests with pre-selected molecules. A NF system is likewise ion-selective. This is the capacity to distinguish numerous ions from one another. Since a nanofiltration system collects solid loaded teams in its membrane structure, electrostatic repulsion/attraction pressures may take place between the parts in the liquid as well as the NF membrane surface, which leads to a certain degree of ion selectivity. Testing:. Screening is a mechanical process that separates particles on the basis of dimension. There are a number of types, which have fixed, shaking or rotating screens. Openings in the screening surfaces range in size depending upon the nature of the waste. In the case of textile dyeing markets they should be tiny sufficient to catch pieces of towel, which could harm process tools, reduce the performance of the ETP or infect waterways. 2.