Sustained-release flocculant, turbid water processing method and a method of manufacturing a sustained-release flocculant

摘要

PROBLEM TO BE SOLVED: To provide a sustained release flocculant for suppressing the outflow of surplus flocculant components and low pH treated water while maintaining the coagulation effect for a long term, and to provide a turbid water treatment method and a manufacturing method of the sustained release flocculant.SOLUTION: A sustained release flocculant is obtained by coating the surface of a water soluble flocculant that contains a divalent or trivalent metal-containing compound with a coating material that contains a resin, and has the water solubility of at least 1 g/20°C pure water 100 g.