Which factor contributes to the efficiency of dissolved solids rejection?

The efficiency of dissolved solids rejection in water treatment systems, particularly in processes like reverse osmosis, is significantly influenced by the pressure applied to the system. Higher pressure enhances the driving force that pushes water through the semi-permeable membrane. This increased pressure improves the separation of dissolved solids and contaminants from the water, leading to more effective purification and higher rejection rates of unwanted substances.

In reverse osmosis systems, for instance, applying greater pressure enables more water molecules to pass through the membrane while leaving the dissolved solids behind. This is because the membrane’s ability to filter out size-based particles and contaminants depends on the energy applied to overcome the osmotic pressure of the solution, which keeps dissolved substances on the feed side of the membrane.

While factors like temperature, type of filtration, and volume of water processed can influence overall system performance, the direct impact of pressure in enhancing the dissolved solids rejection rate is a key aspect of membrane filtration processes.