Water treatment system and method for controlling dosage of water treatment agent

The invention provides a water treatment system and a method for controlling the dosage of a water treatment agent. The control method comprises the following steps: S1, acquiring hydraulic conditions in a water treatment tank; s2, simulating the hydraulic conditions in the water treatment tank through a simulated coagulation reactor; s3, acquiring the relationship between the medicament concentration in the simulated coagulation reactor and the effluent quality under the hydraulic condition; s4, determining the optimal medicament concentration according to the relationship between the medicament concentration and the effluent quality; and S5, determining the dosage of the water treatment agent according to the optimal agent concentration. According to the method for controlling the dosage of the water treatment agent, the coagulating sedimentation process in the water treatment tank is simulated to determine the dosage of the agent in the water treatment process by simulating the coagulation reactor under th