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lime softening water treatmentTo decrease the usage of fresh water in sectors. To protect natural surroundings versus pollution. To satisfy the standards for discharge of pollutants established by the Government. To decrease expense on water acquisition. The Step by Step Effluent Treatment Process:. 1. Separation systems in NF Given that NF system displays residential properties between those of ultrafiltration (UF) and reverse osmosis (RO), both cost and dimension of particle play essential role in NF being rejected device. It has explained NF as a charged UF system whereas referred it as low-pressure RO system. However, NF has advantages of lower operating pressure compared to RO, and also greater natural rejection compared with UF. For the colloids as well as large molecules, physical sieving would certainly be the dominant being rejected device whereas for the ions and also reduced molecular weight compounds, remedy diffusion mechanism as well as fee effect of membranes play the major duty in separation process. The NF being rejected system is classified into adhering to five actions:Moistened surface water connects with the system through hydrogen bonding and also the molecules which form the hydrogen bonding with the membrane layer could be transported. Special sorption/Capillary being rejected– membrane is heterogeneous and also mini porous, and also electrostatic repulsion occurs because of different electrostatic constants of option and also membrane layer.