Modeling Wind Effect on Waste Stabilization Pond Performance
Wind has an important effect on the behavior of ponds as it induces vertical mixing of the pond contents. Good mixing ensures a more uniform distribution and higher dispersion number within the pond and hence a better degree of waste stabilization. This study developed a mathematical model for the prediction of Coliform bacteria (ce/co) on waste stabilization pond performance. The model was developed based on two-dimensional steady dispersed flow model and Hulbult’s (1944) boundary conditions. The solution of the equation was restricted to method of separation of variable and fourier series expansion. The model on wind effect was carried out with different wind speed 2.27m/s, 1.88m/s and 1.64m/s respectively directed at different tanks at inlet, outlet and the side of the tanks labeled, B, C and D, while tank A was under control condition. The model was verified using the laboratory scale model ponds (LSWSP) experimental results. The solution of the model was obtained by writing Fortran computer programme for the computation of coliform bacteria ratio (ce/co). The coefficient of correlation between the measured and the predicted values ranges between 0.8710 to 0.9980 indicating that the prediction are very good.
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