Spatial and Temporal Variation of Raw Sewage of City of Annaba Major Discharge (Northeast Algeria)

The main objective of this study is to evaluate the physicochemical quality of urban sewage from the annaba region and to recommend appropriate treatment for their reuse and reducing their harmful receptors such as boukhadra (site 1), el bouni (site 2) and oued forcha (site 3). analysis carried out for duration of one year (from march 2012 till february 2013). it was revealed that as an organic pollution resulted in a high bod5 and cod which can reach respectively (140.66 ± 26.62 mg/l of o2) and (298.83 ± 84.40 mg/l of o2) in site 1, site 2 is (147.16 ± 33.10 mg/l of o2) for bod5, and (280 ± 55.67 mg/l of o2) for cod and in site 3 the pollution load is represented by bod5 (149.5 ± 22.71 mg/l of o2) and cod (287.33 ± 19.09 mg/l of o2). regarding the tss, their annual average in three sites were 352.83, 340.83 and 369.26 mg/l, respectively. the reported data were far exceeded the algerian standard (50 mg/l). the annual average ratio bod5/ cod for sites 1, 2 and 3 were in the order of 0.47, 0.52 and 0.5, respectively. these results lead the conclusion that the three sewage sites were polluted by organic pollution which was characterized by partially degradable.