Sludge dewatering agents and sludge dewatering treatment method

摘要

PROBLEM TO BE SOLVED: To provide a method of dewatering a sludge capable of reducing a dehydrated cake water content and capable of increasing a sludge treatment amount, without increasing a chemical addition amount, in a hardly-dewatering organic sludge.SOLUTION: The development of the sludge dewatering agent is attained by adding a cationic powdery sludge dewatering agent having a specified structural unit and comprising a highly crosslinking aqueous polymer, when dewatering the sludge, followed to be stirred and flocculated, and by dewatering it thereafter by a dehydrator. The powdery sludge dewatering agent comprises an agent agglomerated by emulsion-breaking a water-in-oil type polymer emulsion obtained by polymerization with coexistence of 20-300 ppm of crosslinking monomer at 80-100 mol% of cationic monomer copolymerization rate, followed to be formed into fine grains after dried.