| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a coagulation treatment method capable of drastically reducing chromaticity and obtaining good treated water in coagulation treatment of colored waste water. <P>SOLUTION: Inorganic coagulant and amidine-based coagulant are added to and mixed with the colored waste water and pH control to a range of 5.0-7.0 is performed as necessary. Then, polymer coagulant is added to generate coagulation flock. Next, solid-liquid separation of the generated coagulation flock is performed. In this favorable embodiment, the polymer coagulant is anionic or non-ionic polymer coagulant including a sulfonic acid group, and consecutive addition is performed when the polymer coagulant is added to generate the coagulation flock. <P>COPYRIGHT: (C)2012,JPO&INPIT |
