SPECIAL SOLID FINE POWDERY FLOCCULANT COMPOSITION AND WATER TREATMENT METHOD

PROBLEM TO BE SOLVED: To obtain a special solid fine powdery flocculant compsn. added to waste water to be treated to flocculate a suspended pollutant present in waste water within a short time only by stirring or dispersing action and to treat waste water by using the flocculant compsn. SOLUTION: A water-soluble aluminum salt or iron salt type inorg. flocculant, a pH self-controller, a fine powdery polymeric flocculant finer than a generally used one and other essential components are uniformly mixed in a powdery and granular state to obtain a special solid fine powdery flocculant compsn. having functionality. This flocculant compsn. is directly added to waste water to be treated alone under stirring to complete flocculation reaction. The formed floc excellent in shape stability and dehydration properties is separated to be excluded out of the system.