Patent ID: 8187410

Claim:
A hollow fiber membrane module comprising: a central water tube, in which treated water flows, having a plurality of inlets formed in a circumferential direction thereof; a central air tube provided in the central water tube, extended from a bottom surface of the central water tube, having a plurality of exits formed in a circumferential direction thereof, and receiving an air supply; and a plurality of small modules, wherein each of the plurality of small modules comprises a housing longitudinally provided in the circumferential direction of the central water tube and connected to the inlets and the exits, wherein each housing comprises a hollow fiber membrane provided in the housing and treating water with a difference of pressure; a fixing part fixing a lower part of the hollow fiber membrane to the housing; a collector provided in the lower part of the housing, communicating with an inner path of the hollow fiber membrane, gathering treated water coming from the hollow fiber membrane, and flowing the treated water to a respective central water tube inlet; and a diffuser provided in the housing, connected to a respective central air tube exit and ejecting the air.