Abstract
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.
Highlights
Unpurified domestic wastewaters represent the main source of organic pollution of waters [1]
Superficial and underground waters are touched in full whip by more and more increased pollution, this last is at the origin of different diseases that can corrupt gravely human health and balance of ecosystems
The present study, taking place in the course of year 2012 is recommended to assess the largeness of pollution of these urban effluents of Sidi Kacem City (Morocco) towards the receiving environment receiving significant wastewaters discharge
Summary
Unpurified domestic wastewaters represent the main source of organic pollution of waters [1]. They procreate a deterioration of the quality of surface and underground waters. The consumption of the water always knows an exponential expansion; it draws away permanently an increase of the debit of polluting rejections in receiving environment [2]. Superficial and underground waters are touched in full whip by more and more increased pollution, this last is at the origin of different diseases that can corrupt gravely human health and balance of ecosystems. The present study, taking place in the course of year 2012 is recommended to assess the largeness of pollution of these urban effluents of Sidi Kacem City (Morocco) towards the receiving environment receiving significant wastewaters discharge. In order to do that, we had recourse to physicochemical analyses accomplished at the level of these two domestic collectors
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