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The aggregation of fine primarily formed calcium phosphate particles with sand grains in a fluidized bed for phosphate removal was studied experimentally by means of a set-up which isolated aggregation from other processes during calcium phosphate precipitation, as well as through experiments under normal operation of the fluidized bed. The net aggregation process was described by means of a mathematical...
The main processes concerning the precipitation of calcium phosphate in a fluidized bed were studied. Primary nucleation and molecular growth occur at the bottom of the bed, where the incoming phosphate is mixed with the reactants, producing fine particles which partly aggregate with the grains of the bed and further leave the reactor with the liquid effluent. This aggregation seems to be the most...
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