| Popis: |
The wastewaters of the agglomeration of Biskra (Southeast Algeria) are poured without treatment in three main dismissals that are Chabat Roba (1st site), Messdour (2nd site) and Wadi Z'ommor (3rd site). The pollution charge determined in the 1st site is the order of 157.76 ± 34.14 mg/L of O2 for the BOD5 (Biochemical Oxygen Demand in 5 days) of 457 ± 73.59 mg/L of O2 for the COD (Chemical Oxygen Demand) and 1109 ± 110.56 mg/L for the TSS (Total suspended Solids). In the 2nd site, the polluting charge is in average of 156 ± 29.72 mg/L of 'O2 for the BOD5, 430.76 ± 29.81 mg/L of O2 for the COD and 1157.92 ± 76 mg/L of O2 for the TSS. The 3rd site, the polluting charge is represented by 152.92 ± 27.76 mg/L of O2 of BOD5, 381.69 ± 70.03 mg/L of O2 of COD and by 1039 ±106.65 mg/L of O2 of TSS. The follow-up of these parameters in the three sites puts in evidence instability of the organic charge during seasons. The COD/BOD5 report equal 3 for the 1st site, this elevated value, watch that these waters are characterized by an inorganic pollution probably due to the industrial origin. With regard to the 2nd and 3rd sites, the COD/BOD5 report is between 3 and 2.5 for the first and between 2 and 2.50 for the second. The results defined the urban nature of the rejection poured in these sites.Key words: Wastewaters, Biskra, COD/BOD5 report, pollution charge, TSS. |
