Abstract
The amount of metal to phosphorus removal is estimated by the graph developed by experimental data in wastewater treatment facility. However, the active sites on the surface of metal hydroxide are claimed to involved in chemical phosphous removal model in EQPS21. In order to evaluate the compatibility of model in EQPS21, various simulations are carried out to compare with the results from literature. It is found that simulation results are well agreed with experimental data in literature. The simulation results prove that the velocity gradient at metal injection point plays a major role in chemical phosphorus removal. When velocity gradient is 20 1/s, Al corresponding of molar ratio of 4.7 has to be injected to raw sewage to have 0.2 mg/L of effluent PO4-P concentrations. However, when velocity gradient is 200 1/s, Al corresponding of molar ratio of 2.4 is required to have same effluent PO4-P concentration.
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