Catchment header and membrane module unit

1. A catchment header comprising: a tubular catchment part including a plurality of membrane module connection parts at the side surface and having a Young's modulus of 4.0 GPa or less for collecting and removing filtrated liquid from a plurality of membrane modules, and a reinforcement member having a Young's modulus of 4.0 GPa to 250 GPa which covers at least a part of the side surface of the tubular catchment part.

2. A catchment header according to claim 1 , wherein said tubular catchment part is formed of a synthetic resin.

3. A catchment header according to claim 1 or 2 , wherein a cross-sectional area of said tubular catchment part perpendicular to a longitudinal direction of the tubular catchment part is 4 to 36 cm 2 .

4. A catchment header according to any one of claims 1 or 2 , wherein said tubular catchment part comprises a plurality of members which are connected in series.

5. A catchment header according to any one of claims 1 or 2 , wherein said reinforcement member is formed of a metal, a filler reinforced plastic, or a fiber reinforced plastic.

6. A catchment header according to any one of claims 1 or 2 , further comprising: a connection part having a protruded shape and that is adapted to be connected to a membrane module.

7. A catchment header according to claim 6 , wherein said connection part is linked to an adjacent connection part that has a protruded shape via a linking member.

8. A membrane module unit, comprising: a plurality of membrane modules, and a catchment header according to any one of claims 1 or 2 to which said plurality of membrane modules are connected.

9. A membrane module unit according to claim 8 , wherein said membrane modules are hollow fiber membrane modules in which bundle ends of a hollow fiber membrane of a sheet shape are accommodated inside a housing of a rectangular shape and are fluid-tightly fixed using a fixing member.

10. A catchment header according to claim 3 , wherein said tubular catchment part comprises a plurality of members which are connected in series.

11. A catchment header according to claim 3 , wherein said reinforcement member is formed of a metal, a filler reinforced plastic, or a fiber reinforced plastic.

12. A catchment header according to claim 4 , wherein said reinforcement member is formed of a metal, a filler reinforced plastic, or a fiber reinforced plastic.

13. A catchment header according claim 5 , further comprising: a connection part having a protruded shape and that is adapted to be connected to a membrane module.

14. A catchment header adapted to be immersed in a fluid that is to be filtered, said catchment header adapted to receive and be connected to a plurality of membrane modules which are to be immersed in the fluid to be filtered, said catchment header comprising:

a hollow tubular-shaped catchment part formed from synthetic resin for collecting and removing filtered liquid from a plurality of the membrane modules, wherein said hollow tubular-shaped catchment part has a side surface, a Young's modulus of 4.0 GPa or less, a plurality of membrane module connection parts on said side surface that are each adapted to receive and be connected to a respective membrane module, and at least one outlet for removing the filtered liquid collected from a plurality of membrane modules, and

a reinforcement member having a Young's modulus of 4.0 GPa to 250 GPa which covers at least a part of said hollow tubular-shaped catchment part.

15. A membrane module unit adapted to be immersed in a fluid to be filtered that comprises a catchment header according to claim 14 ; and a plurality of membrane modules connected to said catchment header.

16. A membrane module unit according to claim 15 , wherein said plurality of membrane modules comprise hollow fiber membrane modules.