PRODUCTION METHOD OF IMMERSION TYPE MEMBRANE CARTRIDGE

摘要

PROBLEM TO BE SOLVED: To provide a production method of an immersion type membrane cartridge enhanced durability to aeration. SOLUTION: A resin-made filter plate 22A is cooled at a specified temperature and a filter membrane 22B is arranged to cover the surface of the filter plate 22A in a state contracted by cooling, and the filter membrane 22B is stuck or welded to the filter plate 22A at a water stopping part S formed on the whole periphery along the peripheral part of the filter plate 22A to fix, and the filter membrane 22B is applied a tensile force by elongating the filter plate 22A under a temperature to be used and is stretched.