In order to use the purified wastewater for the irrigation of a golf course in the Taghazout area (Southwestern of Morocco), this study was conducted to evaluate the physicochemical and bacteriological quality of the treated wastewater in the new Aourir plant (Activated Sludge technology). In order to achieve these objectives, three types of water were analyzed: raw water (RW), biologically treated water (BTW) and water treated by ultraviolet radiation (UV-TW). The physicochemical parameters analyzed were Temperature, pH, Electrical Conductivity (EC), Dissolved Oxygen (DO), Chemical Oxygen Demand (COD), five-day Biological Oxygen Demand (BOD 5 ), Total Suspended Solids (SS), Nitrate (NO 3 ), and Orthophosphates (PO 4 ). Otherwise, the analyzed biological parameters are Total Coliforms (TC), Fecal Coliforms (FC), Escherichia coli (E. coli), and Fecal Streptococci (FS). The physicochemical parameters showed that temperature is always lower than 30°C, the pH is close to neutrality and a strong fluctuation of the high electrical conductivity (2700 μS/cm) occurs in UV-TW. At all stages of wastewater treatment, COD, BOD 5 , SS, NO 3 and PO 4 were below the limit values recommended by Moroccan standards. The bacteriological results showed a high level of bacterial contamination in RW and BTW, but in UV-TW the loads did not exceed 3 log10. The average loads of TC, FC, E. coli and FC in UV-TW were 2.13, 1.67, 1.77, and 2 (log10 CFU/100ml) respectively. Activated sludge treatment combined with UV has demonstrated sufficient quality to reuse treated water in irrigation; however, the UV treatment requires control to avoid any effect on the microbiological and physicochemical quality of green spaces and groundwater.

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The main objective of this study is to characterize the industrial wastewater of the city of Anza located north of Agadir in southwestern Morocco in order to recommend an adequate treatment allowing their reuse, thus reducing the nuisances that undergo the receiving environment (Anza Beach). This study concerns four industrial canned and semi-preserved fish plants that directly discharge their wastewater into the Anza beach. The physicochemical characterization of raw wastewater throughout 2017 revealed that these liquid discharges are heavily loaded with organic matter in terms of COD (Avg = 10557 mg O2 / L) and BOD5 (Avg = 4877 mg O2 / L). ), in TSS (Avg = 3537 mg / L) in mineral matter expressed in terms of chlorides (Avg = 25749 mg / L), and in electrical conductivity (Avg = 68957 μs / cm) with a mean pH close to neutrality. The average levels of total nitrogen and total phosphorus are respectively of the order of 631 mg / L and 84 mg / L. Although these wastewaters have a high organic load (ratio BOD5 / COD = 0.46 and TSS / BOD5 = 0.72), they have a satisfactory biodegradability. Examination of the COD / BOD5 ratio of about 2.16 clearly underlines the biodegradability of the industrial wastewater studied. Biological treatment seems quite suitable.

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