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 theAnnaba region and to recommend appropriate treatment for their reuse and reducing their harmfulreceptors such as Boukhadra (Site 1), El Bouni (Site 2) and Oued Forcha (Site 3). Analysis carriedout for duration of one year (from March 2012 till February 2013). It was revealed that as an organicpollution resulted in a high BOD5 and COD which can reach respectively (140.66 ± 26.62 mg/l ofO2) 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 inthree sites were 352.83, 340.83 and 369.26 mg/l, respectively. The reported data were far exceededthe Algerian standard (50 mg/l). The annual average ratio BOD5/ COD for sites 1, 2 and 3 were inthe order of 0.47, 0.52 and 0.5, respectively. These results lead the conclusion that the three sewagesites were polluted by organic pollution which was characterized by partially degradable.

کلیدواژه ها:

BOD5 ، COD ، Physicochemical quality ، Pollution ، Sewage ، Wastewater