| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a regeneration treatment method for a waste liquid which quickly and effectively precipitates and separation-removes a Sn ion as an oxide from a waste liquid containing the Sn ion. <P>SOLUTION: The waste liquid containing the Sn ion is heated to 70°C or above, also is mechanically stirred while the waste liquid is aerated, and the Sn ion is precipitated as the Sn oxide, so that the Sn oxide is separation-removed. The Sn ion is quickly and effectively precipitated as the oxide to be separation-removed without addition of a chemical. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
