Patent ID: 7718063
Filing Date: 2010-05-18
Classification: B01D,B09C,C02F,Y02A,Y02W

Abstract:
1. Method of depollution by phytoremediation intended for treating wastewater, polluted air or soil comprising: introducing the pollutants in solid, liquid or gaseous form in a planted filter bed; irrigating said planted filter bed so as to define aerobic or anaerobic periods, wherein said step of irrigating allows saturation of the planted filter bed with water during the anaerobic period and in that the organisation of the cyclic irrigation period corresponds to a succession of irrigation/drying periods of the planted filter bed, the irrigation/drying periods being distributed with a ratio of 2/1 to 1/50; and adding acidifying products or natural acids to the planted filter bed during the irrigation periods, wherein the amount of acidifying products added to the planted filter bed is such that the pH value of the planted filter bed, which is in the range of 7 to 9 prior to the addition of the acidifying products, is reduced in the range of 4 to 7.