RAPID FLOTATION DEVICE FOR WATER LADEN WITH SUSPENDED MATTER, AND METHOD FOR IMPLEMENTING SAME

摘要

The invention relates to a rapid flotation device, in particular using dissolved air, for treating water laden with suspended matter (MES). The device comprises a mixing area (B) separated from a flotation area (C) by a wall (n) above which the liquid to be treated passes from the mixing area. The bottom portion of the flotation area comprises: a perforated floor (1) located above an apron (R), a floated-water discharge being provided under the floor and leading to an outlet system (3); and at least two separate channels (2) which are oriented in the direction of flow of the water and are provided under the floor (1), and under optional structures (w) extending from the floor, to a point upstream of the outlet system (3). The downstream end (2.1) of the channels is open and located above the floor level, and a discharge means (V) is provided, for each channel, at the end of the downstream bottom portion of said channel.

主权项

1. A rapid flotation device, notably a dissolved air flotation device, for treating water laden with suspended matter (MES), comprising: a mixing zone separated from a flotation zone by a wall above which the liquid for treatment, coming from the mixing zone, passes, the flotation zone comprising toward the bottom a perforated floor situated above a sole, a float water discharge being provided under the floor leading to an outlet system, wherein:
at least two separate canals, oriented in the direction in which the water flows, are provided under the floor and under any works that may extend the floor, leading to upstream of the outlet system, the downstream end of the canals is open and situated above floor level, and a discharge means is provided, for each canal, at the end of the downstream bottom part of this canal.