Chemical reagents mixing within raw water appears at several stages of the drinking water
process. In particular, in the clarification step, coagulant and flocculant (or polymer aids) dosage
and mixing within raw water have to be efficient to avoid over-dosage, reducing expenses
and limiting residual reagent leakage. Computational Fluid Dynamics (CFD) modeling allows to
assess the corresponding mixing device efficacy before implementing it on site. Full-scale data
can be used to reproduce the phenomena involved inside the process. In this study, three applications of
mixing assessment through CFD are considered: two designs of flash mixing for coagulant
dispersion are compared, residence time distribution is studied for a potential extra mixing
chamber and injection system location and efficacy for coagulant-aid are studied on full-scale
data. Optimum operating conditions, optimum device location and predictive behavior can be
derived from CFD, to support the operator in its technical optimization of mixing devices. Includes 6 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 920 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 16 |
| Published : | 11/01/2005 |
