To provide a low cost, compact and highly reliable treating system.
In the treating system 500, a spiral type membrane module 100 is provided at the front stage of a reverse osmosis membrane separation device 300, and a pretreatment is performed with the spiral type membrane module 100. The spiral type membrane module 100 is formed by loading a spiral type membrane element in a pressure container. The spiral type membrane element is constituted by covering a spiral-shaped membrane element consisting of a plurality of independent or continuous envelope-like membranes on the outer peripheral surface of a water collection tube via raw water spacers with a separation membrane and further covering the resultant assembly with an outer peripheral part flow path material.
ANDO MASAAKI
HISADA HAJIME
