| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and a device for deciding a flocculating agent infusion rate capable of automatically deciding a proper flocculating agent infusion rate in a short time in a method for treating water which performs coagulation/sedimentation treatment. SOLUTION: After the flocculating agent 20 is injected into test water tanks with a coagulation analyzer including the test water tanks 1A to 1D that store a predetermined amount of raw water, a feed water pump 7, water feed/discharge vales 4, 6 for the raw water and cleaning water, stirrers 3A to 3D, a flocculating agent injection section 21, a detector 30 that measures particle sizes and particle number of floc, and the like, the flocculating agent infusion rate is decided or an infusion amount of the flocculating agent is controlled from an agglomeration starting time after the flocculating agent is dispersed by stirring and a time for an agglomeration of particles to start (agglomeration starting time) is measured. COPYRIGHT: (C)2009,JPO&INPIT
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