Etude de la circulation dans les bassins d'aeration a boues activees

Keeping the mixed liquor in suspension is one of the critical problems in aeration tanks. This can only be assured by adequate circulation of the liquid. A hydrodynamic study in different laboratory and industrial scale aeration tanks, has been carried out to characterise the circulation (bottom velocity, V_f, mean circulation velocity) using the following parameters i.e. tank geometry and air flow rate G. This study also proposes a scale-up criterion for aeration tanks. All the dimensions of these tanks are given in Table 1.