Submerged hyperfiltration system

A water purification system (40) comprising a plurality of spiral wound hyperfiltration membrane modules (2) each connected in a parallel flow arrangement to a common feed manifold (44) and a common permeate manifold (46);

• wherein each module (2) comprises at least one feed spacer sheet (6) and one membrane envelop (4) wound about a permeate collection tube (8) having a plurality of openings (24) along its length that are in fluid communication with the membrane envelop (4) and which are encased within a shell (38) extending along a length between two opposing ends (30, 32), and further including an end cap (56) secured to an end (30) of the module (2);
• a manifold junction (66) is reversibly connected to the end cap (56) of each module (2), wherein the manifold junction (66) provides a sealed fluid communication between the feed spacer sheets (6) and permeate collection tubes (8) of each module (2) to the feed manifold (44) and permeate manifold (46), respectively;
• and
• wherein the modules (2) and manifolds (44, 46) are submerged under water;
• and wherein the system (40) further comprises:
• a first pump (48) in fluid communication with the feed manifold (44) and adapted to drive feed flow through the feed spacer sheets (6) of each module (2) and
• a second pump (50) in fluid communication with the permeate manifold (46) and adapted to withdraw permeate from permeate collection tube (8) of each module (2).