| 摘要 |
PROBLEM TO BE SOLVED: To provide a new concept of coagulating sedimentation treatment and a concrete coagulating sedimentation method and apparatus for realizing it in order to optimize the entire system including the following filtration treatment and sludge treatment. SOLUTION: A tilting device 8 having a small mounting pitch is used in place of a conventional coagulating sedimentation method in which an agglomeration method having a low agitation intensity is selected for avoiding floc breaking to realize high efficient agglomeration of particles having a diameter of≤3.0μm and making fine flocs high density in a fine floc generation process on condition that outflow of fine flocs having a diameter of≥3.0μm, which are broken pieces after the floc breaking, is obstructed. A coagulant injection rate is controlled so that the STR of a floc generation process inlet 201 is set at minimum requirement to minimize the amount of outflow fine flocs into settled water while maintaining flocs to be settled and separated and fine flocs flowing out into a filter basin in a state of fine particulates and high density. COPYRIGHT: (C)2009,JPO&INPIT
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