| 摘要 |
PROBLEM TO BE SOLVED: To provide a flocculant injection control system which enables a further shortening of the time-delay of a feedback correction, is applicable also when raw water is in a high-turbidity, and can calculate a suitable flocculant injection amount. SOLUTION: The system comprises a mixing basin 440 injecting a flocculant to raw water 410 to form a flock, a sedimentation basin 470, a raw water sensor 420, a first water collecting means 610 collecting raw water 410, a turbidity classifier 580 having a rotating filter and obtaining turbidity classification-treated water 600, a flocculation test apparatus 620 obtaining a supernatant solution 630 of the turbidity classification-treated water 600, a second water collecting means 570 collecting flocculant injection water between the mixing basin 440 and the sedimentation basin 470, a flock classifier 530 having a rotating filter and obtaining flock classification-treated water 550, a supernatant solution-turbidity sensor 640, a classification-treated water turbidity sensor 560, a control means 100 having an injection ratio calculation function and an injection ratio correction function to decide the injection amount of the flocculant, and a water purification facility control means 300 controlling chemical dosing equipment 450. COPYRIGHT: (C)2011,JPO&INPIT
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