The goal of this study is the evaluation of pollution by the
physic-chemical characterization of urban wastewaters discharged in the river R’dom of the town Sidi Kacem. The motivation of
this study is multiple firstly to give an answer to the choice of methods of
treatment of raw sewage and secondly to raise awareness of the pollution of the
river R’dom who is a source of irrigation in the region. The physic-chemical
analyses were carried out on the level of the collector 1 (domestic collector
of the Zaouia District) and that of collector 2 (domestic collector of the
allotments Thami Amar, road of Tangier and Saada), during the year 2012 at the
same time “in situ” and at the Laboratory of
Environment (Faculty of Sciences Kenitra). The polluting load out of organic
matter (DBO5, DCO, MES), out of mineral matter (Cl-, Ca2+,
Mg2+, K+, , Na+) and out of nitrogenized matter (, , Nitrogenize
total) was more important, except for the temperature and of the pH which are
in conformity with the Moroccan standards of rejection. Ratios DCO/DBO5,
DBO5/DCO and MES/DBO5 inform about the biodegradability of these effluents and permitted choice
of the suitable treatment process. Indeed, results obtained show that the domestic
effluents exceed the national standards of rejection, which requires an
intervention of the competent
jurisdictions in order to preserve the public health, to protect the
environment and install an efficient sewage treatment plant to ensure a sustainable development.