Modeling of Evaporation Losses in Sewage Sludge Drying Bed

JI Obianyo, JC Agunwamba
2015 Nigerian Journal of Technology  
A model for evaporation losses in sewage sludge drying bed was derived from first principles. A model for evaporation losses in sewage sludge drying bed was derived from first principles. A model for evaporation losses in sewage sludge drying bed was derived from first principles. A model for evaporation losses in sewage sludge drying bed was derived from first principles. This This This This model model model model 6 7 8 9: ; 69 <= was developed based on the reasoning that the rate at which
more » ... he rate at which evaporation is taking place is directly was developed based on the reasoning that the rate at which evaporation is taking place is directly was developed based on the reasoning that the rate at which evaporation is taking place is directly was developed based on the reasoning that the rate at which evaporation is taking place is directly proportional to the instantaneous quantity of water in the sludge. The aim of this work was to develop a model to proportional to the instantaneous quantity of water in the sludge. The aim of this work was to develop a model to proportional to the instantaneous quantity of water in the sludge. The aim of this work was to develop a model to proportional to the instantaneous quantity of water in the sludge. The aim of this work was to develop a model to assist in the design of drying beds for e assist in the design of drying beds for e assist in the design of drying beds for e assist in the design of drying beds for effective treatment of wastes derived from households' septic systems. Data ffective treatment of wastes derived from households' septic systems. Data ffective treatment of wastes derived from households' septic systems. Data ffective treatment of wastes derived from households' septic systems. Data generated after evaporation experiment in sewage sludge drying bed over a period of 15 days at 24 hours intervals generated after evaporation experiment in sewage sludge drying bed over a period of 15 days at 24 hours intervals generated after evaporation experiment in sewage sludge drying bed over a period of 15 days at 24 hours intervals generated after evaporation experiment in sewage sludge drying bed over a period of 15 days at 24 hours intervals was used for the modeling. The model was calibrated and regressed was used for the modeling. The model was calibrated and regressed was used for the modeling. The model was calibrated and regressed was used for the modeling. The model was calibrated and regressed using data for days 1 to 8 by employing the using data for days 1 to 8 by employing the using data for days 1 to 8 by employing the using data for days 1 to 8 by employing the Pearson's correlation coefficient, " Pearson's correlation coefficient, " Pearson's correlation coefficient, " Pearson's correlation coefficient, " r " was found to be 893 893 893 893 3. MATHEMATICAL DERIVATIONS 3. MATHEMATICAL DERIVATIONS 3. MATHEMATICAL DERIVATIONS 3. MATHEMATICAL DERIVATIONS Assumption: Moisture content of the sand and gravel layers vary as seepage and evaporation take place. But for ease of modeling, their moisture contents were assumed to be constant.
doi:10.4314/njt.v34i4.31 fatcat:cvadgh4tk5a4hfzxwkujrygqam