STRATIFICATION IN WASTE STABILIZATION PONDS II: MODELLING
DOI:
https://doi.org/10.4314/njt.252.535Keywords:
Waste stabilization pond, model, algebraic, completely mixed, stratificationAbstract
The occurrence of thermal stratification in waste stabilization ponds (WSPs) alters the flow pattern of the pond. Hence, its study is important for complete and accurate modelling of the waste stabilization pond. In this study, a mathematical model for prediction of thermal stratification and mixing in waste stabilization ponds was developed under completely mixed condition for each sub-layer. The solution was obtained by simple algebraic substitution and the results verified with data from the field waste stabilization pond at the University of Nigeria, Nsukka and Laboratory scale waste stabilization pond. The theoretical results compared favourably with the experimental observation with coefficients of correlation ranging from 0.7000 to 0.9999. The application of the model in pond designand evaluation were also presented.
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