Sludge dehydrating agent

摘要: A sludge dehydrating agent which is excellent in storage stability and prevented from becoming water-insoluble during hence can be distributed the market securely by solving problem of conventional agents comprising amphoteric polymers that they undergo deterioration become when stored for long, thus substantially unusable. This comprises a copolymer composed cationic vinyl monomer units, vinylic carboxylic acid units nonionic salt group IIA metal periodic table. Preferable examples include acrylic, methacrylic crotonic acids, while those acrylamide methacrylamide. The salts usable herein mineral acids organic preferable calcium chloride, magnesium chloride sulfate. Preferably, amount ranges 10 to 60 mole %, 45 %. molar ratio 0.3 3.0, 0.2 2.0. may further contain an inorganic coagulant.