transformation and removal of nitrogen was studied in a pilot high rate pond
with a surface area of 10.2 m2 and water depth of 60 cm. The pilot
unit received wastewater from an existing field scale primary facultative pond
at the University of Dar es Salaam. Wastewater samples were collected from the
influent and effluent of high rate pond and were analyzed for physical-chemical
parameters in the laboratory and in situ. An appropriate model complexity was selected, from which a conceptual model was
then developed to model various processes in the system using STELLA 6.0.1
software. The study demonstrated that dominant nitrogen transformation
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