Physicochemical quality of an urban municipal wastewater effluent and its impact on the receiving environment.

Environmental Monitoring and Assessment
Emmanuel E Odjadjare, Anthony I Okoh

Abstract

The physicochemical qualities of the final effluents of an urban wastewater treatment plant in South Africa were assessed between August 2007 and July 2008 as well as their impact on the receiving watershed. The pH values across all sampling points ranged between 6.8 and 8.3, while the temperature varied from 18°C to 25°C. Electrical conductivity (EC) of the samples was in the range of 29-1,015 μS/cm, and turbidity varied between 2.7 and 35 NTU. Salinity and total dissolved solids (TDS) varied from 0.36 to 35 psu and 16 to 470 mg/L, respectively. The concentrations of the other physicochemical parameters are as follows: chemical oxygen demand (COD, 48-1,180 mg/L); dissolved oxygen (DO, 3.9-6.6 mg/L); nitrate (0.32-6.5 mg NO₃⁻ as N/L); nitrite (0.06-2.4 mg NO₂⁻ as N/L); and phosphate (0.29-0.54 mg PO₄³⁻ as P/L). pH, temperature, EC, turbidity, TDS, DO, and nitrate varied significantly with season and sampling point (P<0.05 and P<0.01, respectively), while salinity varied significantly with sampling point (P<0.01) and COD and nitrite varied significantly with season (P<0.05). Although the treated effluent fell within the recommended water quality standard for pH temperature, TDS, nitrate and nitrite, it fell short of stipulated s...Continue Reading

References

Oct 20, 2005·Journal of Bioscience and Bioengineering·S TomidaT Kobayashi

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Citations

Jul 26, 2012·International Journal of Environmental Research and Public Health·Emmanuel E OdjadjareAnthony I Okoh
Aug 22, 2015·International Journal of Environmental Research and Public Health·Ejovwokoghene C Odjadjare, Ademola O Olaniran
Jan 18, 2018·Water Science and Technology : a Journal of the International Association on Water Pollution Research·José Otavio Goulart Pecly
May 3, 2013·Environmental Monitoring and Assessment·Vincent N ChigorAnthony I Okoh
Feb 14, 2020·International Journal of Environmental Research and Public Health·Eunice IlomsRamganesh Selvarajan
Mar 27, 2021·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Mohamed M Arêmou DaoudaPatrick Drogui
Jul 30, 2021·Environmental Monitoring and Assessment·Farhana MasoodRavinder Kumar Kohli

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