The present invention relates to a system for treating total phosphorus in sewage. More specifically, provided is a system for treating total phosphorus in sewage, which improves the stability of water quality management and increases the economic efficiency by enabling the optimal adaptation in response to a situation when a coagulant is injected into an aeration tank. To this end, the content and quantity of phosphorus in the sewage and treated water flowing into and out of a reactor are monitored and the coagulant is controlled for optimal injection through a dualized injection unit, thereby enabling efficient water quality management.;COPYRIGHT KIPO 2020
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