| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for treating an acid waste liquid and an alkali waste liquid by which the acid waste liquid and the alkali waste liquid caused in a pickling step, a surface treatment step or the like for a steel sheet can be cleaned into a reusable state as industrial water with a compact equipment configuration. <P>SOLUTION: The method for treating an acid waste liquid and an alkali waste liquid comprises: a neutralization-condensation/precipitation treatment step 10 where an acid waste liquid and an alkali waste liquid are neutralized, and thereafter, condensation/precipitation treatment is performed; and a purification treatment step 20 where the treated water treated by the neutralization-condensation/precipitation treatment step 10 is purified by an ion exchange resin, and further, as the regeneration liquid of the ion exchange resin, an acid waste liquid and an alkali waste liquid are used. <P>COPYRIGHT: (C)2008,JPO&INPIT |
