FLOCCULANT COMPOSITION AND PROCESS FOR PRODUCING THE SAME

摘要

The invention relates to a flocculant composition which has an excellent ability to adsorb suspended particles, does not cause an increase in the viscosity of sludge, provides good water drainage and can decrease a moisture content in cake upon mechanical dewatering, and can be applied to a wide variety of sludge, which is obtained by utilizing advantages of a crosslinking water-soluble polymer and a linear water-soluble polymer, and changing a mixing ratio of the crosslinking water-soluble polymer and the linear water-soluble polymer using a state of the particle size distribution of sludge particles as an indicator, and a process for producing the same. That is, it is a flocculant composition comprising (A) a vinyl polymer type crosslinking water-soluble polymer with a charge inclusion ratio of 20% or more and (B) a vinyl polymer type linear water-soluble polymer with a charge inclusion ratio of 5% or more and less than 20%. It is preferred that in response to the change of the mass percentage of 200 mesh-on particles in sludge to the total suspended particles in the sludge, the mixing of the (A) vinyl polymer type crosslinking water-soluble polymer with a charge inclusion ratio of 20% or more and the (B) vinyl polymer type linear water-soluble polymer with a charge inclusion ratio of 5% or more and less than 20% in the flocculant composition is changed.