| 摘要 |
<p>A cleaning plant, which operates at least partly by suction and has at least one vacuum unit (9) and a skimmer (5), includes at least one transfer chamber (1) situated at a distance of less than 10 m, preferably less than 8 m, from the skimmer. Where there are two transfer chambers there is a similar distance between them. One of the transfer chambers is connected to the vacuum unit at surface level to draw off the pollutant from a phreatic layer, and once the chamber is filled it is returned to atmospheric pressure by opening a valve (V3). The chamber is then emptied via a pipe (6) inserted into it and connected to the vacuum chamber through another valve (V2).</p> |
