What is the effect of higher pressure on dissolved solids rejection in water systems?

Higher pressure in water systems, particularly in reverse osmosis systems, significantly affects the rejection of dissolved solids. When pressure increases, it facilitates the movement of water through the semipermeable membrane while simultaneously enhancing the driving force for the separation of contaminants from the water.

As the pressure rises, the osmotic pressure difference that governs the filtration process becomes more substantial, allowing for a higher volume of pure water to be produced while effectively rejecting a larger percentage of dissolved solids. This results in an increased rejection rate, meaning that the system is more effective at removing contaminants from the water being treated.

In contrast, reduced rejection rates could occur under lower pressure due to insufficient driving force, which might prevent the effective separation of solids. Thus, the influence of increased pressure results in more robust operational efficiency in water treatment systems, effectively leading to the conclusion that an increase in pressure correlates to an increased rejection rate of dissolved solids.