| 摘要 |
PROBLEM TO BE SOLVED: To provide a flocculation method of oil inclusion cleaning waste water in which operation is made simple, even if a used amount of a polymeric flocculant is small, a favorable flocculation floc can be formed, and treatment water having favorable water quality can be obtained.SOLUTION: A flocculation method on oil inclusion cleaning waste water is that the oil inclusion cleaning waste water in which pH is at most 8.0 is added with a cationic polymeric flocculant in which an inherent viscosity is 8.0-20 dL/g, and that includes a polymer having a dimethylaminoethyl acrylate methyl chloride quaternary salt unit. |
