Elimination of ammoniacal nitrogen existing in wastewater by infiltration percolation process

Abstract

Cluster development and human activity, be it domestic, industrial or agricultural, is responsible for the production of natural pollution (organic, inorganic,..). The objective of this research is to follow the evolution of ammoniacal nitrogen, nitrites and nitrates in domestic wastewater treated by the process of infiltration-percolation using sand of M'zar (region of Agadir, Morocco) as a filter material. The latter is characterized by the effective diameter (D₁₀) and the coefficient of uniformity (C_u) which is 0.15 and 1.46 respectively. The operating principle is based on an aerobic biological filtration on granular medium (sand). The nitrogen content of treated water varies with the origin of raw sewage and sewage system conditions, the results we found show a 95% removal of this pollutant.