Potential Impacts of Kirinya Wetland in Treating Secondary Municipal Effluent from Jinja Stabilisation Ponds
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CONCLUSION: The values of conductivity and concentrations of nutrients and faecal coliforms measured in this study, clearly demonstrate that the wastewater from the stabilisation ponds is channelled in Kirinya West wetland. Most of it flows on the western edge of the wetland in the same location where the effluent from the ponds is discharged. Low values of most variables at the swamp-lake interface of Napoleon Gulf, Lake Victoria, provide evidence that the Kirinya wetland, still provides some tertiary treatment, as the concentration and values of most variables decrease through the swamp towards the lake. Ammonium nitrogen from the last maturation pond further decreased by 80% and faecal coliforms by 98%. Overall the values in the effluent (nutrients and -faecal coliforms) from the ponds were still bigher than those recommended by NEMA for effluent discharge into water or on land (NEMA, 1999) Hopefully, the wetland will provide more effluent treatment (up to tertiary level) after it bas been bio-manipulated and the wastewater distributed over a large expanse of the wetland.