| 摘要 |
<p>The present invention relates to a method for purifying contaminated water, comprising the steps of carrying the contaminated water in upward direction from below through a bed of granular material; and draining the purified water from the filter bed at a level located a determined distance from the top of the bed. Preferably the bed is further aerated, preferably from below. The invention also relates to an installation for carrying out the method. <IMAGE></p> |
