The efficiency of the pre-treatment of the seawater is critical to keep the performances of the plant stable in the long run.
This step, when properly designed, remove most of the impurities (particles and colloïds). Thus, it protects the high pressure (HP) pump and the membranes from a premature fouling.
The water pumped by means of the booster pump passes through a sand filter (SF) which performs mechanical filtering. This filter retains the biggest particles suspended in the seawater in order to increase the life span of the following filtration cartridges.
The water then passes through two successive filters with, respectively, 20μ and 5μ cartridges. They complete the clarification of the water before it passes through the HP pump.
The entire pre-treatment process is designed to facilitate maintenance and extend the life of the membranes and the HP pump.
