| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a clarification method of river water capable of continuously supplying clean water by operating a public water system without pausing the system even when the turbidity of river water is turned to be high.SOLUTION: In a clarification method of river water, coagulant is added to river water in a chemicals mixing basin, thereafter, the river water is introduced to a flocculation basin to flocculate turbid material, subsequently, sludge blanket parts divided into square shape are provided by a water flow inclined plate in an inclined plate sedimentation basin, flocculated river water is introduced to the inclined plate sedimentation basin made by installing the inclined plate on the downstream side, sludge sedimented in the inclined plate sedimentation basin is introduced to a sludge discharge basin through a sludge discharge pipe from a bottom part of the inclined plate sedimentation basin, the sludge water is introduced to a concentration tank which is multiply extended in a circular shape by the water flow inclined plate to perform concentration of sludge and, thereafter, is introduced to a solar drying floor or a dehydrator and, on the other hand, supernatant water on the inclined plate sedimentation basin is introduced to a rapid filtration basin having a filtration layer and clean water passing through the filtration layer is introduced to a pure water basin.</p> |
