| Abstract |
| This study investigated to find out optimum operation conditions of coagulation for phosphorus removal using the effluents of actual biological wastewater treatment. Alum was used as coagulant in the experiment. Effects of Al/P molar ratio, rapid mixing intensity and time, which would affect hydrolysis of alum, were investigated. As Al/P molar ratio increased, the concentration of phosphorus in treated wastewater decreased. In order to obtain the phosphorus concentration of 0.1 / ㎎ below, more than 3.0 of Al/P molar ratio was required. Effects of rapid mixing intensity on ℓ phosphorus removal were significant at low Al/P. The removal efficiencies of soluble phosphorus increased when high rapid mixing intensity and short time were applied at Al/P ratio of 1.5. However, the highest removal efficiency T-P was obtained with G of 300 sec-1. |
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| Key Words |
| wastewater effluent, phosphorus removal, coagulation, Al/P molar ratio, rapid mixing intensity |
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