Abstract
The contribution of discharges of urban wastewater to the aquatic environment was evaluated. In Oued Kebir East downstream, several parameters were determined for the discharges of the urban areas. The environmental discharge objectives method (EDO) has been applied to discharges of urban wastewater. The concentration of three parameters (chlorides, nitrates, and phosphates) has been analyzed. Calculations of EDO showed negative values for phosphates, which means that Oued Kebir East River has a strong concentration of these ions, and consequently their discharge in this stream should be forbidden. The concentrations in the effluent of chlorides and nitrates depend on Oued Kebir East rates. They are in the range of 252.64–1,033.33 mg/L for chlorides and 3.26–12.58 mg/L for nitrates.
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