| 摘要 |
The present invention describes how a water raw flow which is going to be treated, is normally introduced in a sand separator (2) during sand separation periods, to separate therein, a cleared of sand and sand flow. During other periods, for example, raining or strong water demand, a coagulating agent, ballasting sand, and a flocculating agent are introduced, coagulated flow is circulated in a maturing intermediary zone (14), and then it is circulated practically with all sand and colloids and agglutinated particles, in sand separator, wherein a decanted effluent which is evacuated, and muds constituted by sand and colloids and agglutinated particles which are extracted and evacuated by extracting means (22) and sand outlet via (51) of that sand separator, are decanting-separated; muds are collected, ballasting sand is separated therefrom (54, 63) to re-circulate it in sand injection zone, and muds and excess sand are extracted. |
