| 摘要 |
<p>A water-treating method is disclosed wherein water containing salts and/or organic substances, as raw water, is subjected to a membrane-separation treatment with a composite semipermeable membrane to obtain permeation water wherein the salts and/or the organic substances are sufficiently removed in practice. A specific composite semipermeable membrane is used in this context which comprises a thin film and a support membrane for supporting same, wherein the thin film comprises a polyamide based resin having a constituent unit obtained by a condensation reaction of a diamine component and an aromatic polyfunctional acid halide, and wherein a fungicide is added to the raw water.
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