Subsea desalination system for shallow water

A shallow water desalination system comprising:

• a subsea desalination template adapted to be located on a seabed, including at least one Reverse Osmosis (RO)-module zone, at least one RO-module connection and desalination template piping in fluid connection with the at least one RO-module connection;
• at least one retrievable subsea RO-module adapted to be placed in the at least one RO-module zone of the subsea desalination template, the at least one retrievable subsea RO-module including a RO-template connection adapted to be connected to the at least one RO-module connection, and at least one RO-cartridge assembly (3) in fluid connection with the RO-template connection;
• at least one seawater booster pump assembly with an inlet and an outlet adapted to be in fluid connection with a seawater inlet side of the at least one RO-cartridge assembly;
• at least one retrievable subsea booster module including at the at least one seawater booster pump assembly;
• at least one booster module template connection on the at least one retrievable subsea booster module, adapted to be connected to a booster module connection on a template with a booster module zone;
• at least one desalinated water line adapted to convey desalinated water from the at least one retrievable subsea RO-module to a location above a sea level;
• and
• a pressure regulator in fluid connection with a retentate side of the least one retrievable subsea RO-module.