The Effluent Quality Discharged and Its Impacts on the Receiving Environment Case of Kacyiru Sewerage Treatment Plant, Kigali, Rwanda

Abstract The study evaluates the performance of Kacyiru Sewage Treatment Plant and its effluent impacts on the receiving wetland. Influent and effluent wastewaters as well as receiving wetland water qualities were measured from April to September 2019, at Kacyiru estate. The average removal efficiency (%) of the parameters such as TN, TP, COD, BOD5 were recorded as 46.57; 61.49; 50.51; 66.79 respectively. The parameters such as pH, TDS, temperature value, were recorded within the prescribed limit of Rwanda standards for domestic wastewater discharge. The other parameters such as NTU, TN, TP, TSS, BOD5 and Fecal coliforms were not complying with National standards requirements for domestic wastewater discharge. The finding showed that the excess nutrient observed may present potential sources of pollution in wetland and decrease the oxygen levels which affect the water living organisms. The discharged effluents contain microbes which can negatively devastate the receiving environment, thus the effect of discharged wastewater on environment is significant.

Keywords Bacteriological parameters, physico-chemical parameters, receiving environment, sewage treatment plant, wastewater.

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Agriculture Journal: The Effluent Quality Discharged and Its Impacts on the Receiving Environment Case of Kacyiru Sewerage Treatment Plant, Kigali, Rwanda

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