| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for scale removal performed in an existing denitrification apparatus without spending a large amount of money. Ž<P>SOLUTION: The adhesive material removing method for removing basic adhesive material adhered to the denitrification apparatus for removing ammonium salt from ammonium salt-containing raw water includes: the first process for discharging treated water remaining in a purified water discharge passage 23, the denitrification intermediate tank-stripping column connecting passage 20, and a stripping column 11, and the second process for filling the purified water discharge passage 23, the denitrification intermediate tank-stripping column connecting passage 20, and the stripping column 11 with the ammonium salt-containing raw water to leave them to stand. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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