After lime softening, only ...

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After lime softening, only non-carbonate hardness will be in the water. In this case, it is advantageous to apply the process of RO desalination, which will have a very small discharge of wastewater. After RO, the water will have a slight salinity and this will significantly increase the filtercycle of ion exchange systems. If there are problems with high organic content, it is possible to combine the liming process with coagulation. It is necessary to use iron salts as a coagulant, not aluminum because of the high pH of the water.