Osuolale Olayinka, Okoh Anthony
SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice 5700, South Africa.
Applied and Environmental Microbiology Research Group, Department of Biochemistry and Microbiology, University of Fort Hare, Alice 5700, South Africa.
Int J Environ Res Public Health. 2015 Oct 23;12(10):13399-412. doi: 10.3390/ijerph121013399.
The final effluents of two wastewater treatment plants (WWTPs) in the Eastern Cape Province of South Africa were evaluated for their physicochemical and microbiological qualities over a period of 12 months. The physicochemical parameters assessed ranged as follows both plants. The ranges of values for the physicochemical are: pH (3.9-8.6), total dissolved solids (86.50-336.3 mg/L), electrical conductivity (13.57-52.50 mS/m), temperature (13-28 °C), nitrate (0-21.73 mg/L), nitrite (0.01-0.60 mg/L), orthophosphate (1.29-20.57 mg/L), turbidity (4.02-43.20 NTU), free chlorine (0.05-7.18 mg/L), dissolve oxygen (3.91-9.60 mg/L), biochemical oxygen demand (0.1-9.0 mg/L) and chemical oxygen demand (4.67-211 mg/L). The microbiological assessment for both WWTPs revealed the presence of E. coli in counts ranging between 0 and 1.86 × 10⁴ CFU/100 mL and Vibrio counts ranging between 0 and 9.93 × 10³ CFU/100 mL. We conclude that these WWTPs are important point sources of pollution in surface water with potential public health and ecological risks.
对南非东开普省两家污水处理厂（WWTPs）的最终废水进行了为期12个月的理化和微生物质量评估。两所污水处理厂评估的理化参数范围如下。理化参数的值范围为：pH（3.9 - 8.6）、总溶解固体（86.50 - 336.3 mg/L）、电导率（13.57 - 52.50 mS/m）、温度（13 - 28 °C）、硝酸盐（0 - 21.73 mg/L）、亚硝酸盐（0.01 - 0.60 mg/L）、正磷酸盐（1.29 - 20.57 mg/L）、浊度（4.02 - 43.20 NTU）、游离氯（0.05 - 7.18 mg/L）、溶解氧（3.91 - 9.60 mg/L）、生化需氧量（0.1 - 9.0 mg/L）和化学需氧量（4.67 - 211 mg/L）。两家污水处理厂的微生物评估显示，大肠杆菌数量在0至1.86×10⁴ CFU/100 mL之间，弧菌数量在0至9.93×10³ CFU/100 mL之间。我们得出结论，这些污水处理厂是地表水重要的污染源，具有潜在的公共卫生和生态风险。
