| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To develop a coagulation treatment agent having satisfactory coagulation performance for sewage-mixed crude sludge, sewage excess sludge, sewage digestion sludge and a variety of excess sludge in a sewage treatment plant and high reducing performance of cake moisture content by use of a (meth)acrylic monomer used widely as a commercialized product without using a polyamidine-based aqueous polymer. <P>SOLUTION: The coagulation treatment agent includes the following (A) and (B). (A): An aqueous polymer obtained by adding and polymerizing 80-100 moles of a specific cationic monomer and another monomer, and 20-300 ppm, relative to the monomer mixture, of a cross-linking monomer. (B): an aqueous polymer having a vinyl amine structural unit. Although the coagulation treatment agent containing the (A) and (B) is usable in any product form, a water-in-oil emulsion or a powder product obtained by granulating a solidified product in which the water-in-oil emulsion is emulsion-broken followed by drying is particularly preferred. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
