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The pattern of hydrodynamic in water treatment disinfection to estimate organism removal |
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Euis Nurul Hidayah* and Okik Hendriyanto C |
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Department of Environmental Engineering, UPN “Veteran” Jatim
Surabaya, Indonesia
Accepted September 11, 2013 |
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Abstract |
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Direct evaluation of the performance
and efficiency of disinfection tanks could more costly and time
consuming. Mathematical model can be a good alternative to
observe the hydrodynamic in a disinfection basin. Mathematical
model was constructed from two hydrodynamic equations, namely
the continuity equation and momentum equation. This research
aims to study mathematical models of velocity, NRe, NFr, E.coli
distribution and residual chlorine patterns in baffle channel
disinfection tanks based on the hydrodynamic model (HPAd Model)
mathematical formulation. Research includes the formulation of
mathematical models whose results will be visualized with
Mathlab, the acquisition of primary data using physical models,
testing the model using Mathlab with the primary data input. The
result of running the program input data showed variations in
E.coli distribution patterns in the disinfection basin which
explained that the channel from the inlet to the outlet there is
an increase of flow velocity pattern (u), Reynolds numbers (NRe)
and Froude numbers (NFr), but E.coli distribution and residual
chlorine decrease. This research focus on pattern of
hydrodynamic to disinfection process, thus simulation only
showed E.coli can be removed around 30%-50% and residual
chlorine 50-80% removal. Implementation of the HPAd model still
in laboratory scale and effect of hydrodynamic conditions, then
the research will continue to use optimum disinfectant dosage to
remove organism in relation with hydrodynamic condition. |
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