| abstract |
(57) [Summary] [Purpose] To provide a method for dehydrating sludge. [Structure] A method in which a metal salt and a polymer are added to organic sludge, the mixture is granulated and concentrated, and the granulated product is dehydrated. As the polymer, a cationic vinyl-based polymer obtained by polymerizing a vinyl monomer containing 0.0005 to 0.003 wt% of a polyfunctional monomer is used. |