System for optimizing coagulant dosage through water turbidity measurement

摘要

PURPOSE: A chemical dosage optimizing system with the turbidity measurement of inflow feed water and filtered water is provided to optimize the dosage of coagulant corresponding to the rapid change of water quality. CONSTITUTION: A method for adjusting the dosage of coagulant in a water treatment process includes the following steps: the expected turbidity of inflow feed water is divided by regions; the flux and the turbidity of the inflow feed water to set the primary dosage of coagulant according to the injection concentration of the coagulant which corresponds to the measured turbidity of the inflow feed water; and the coagulant injection process and the turbidity measuring process are repeated to optimize the dosage of the coagulant. [Reference numerals] (AA) Inflow feed water on-line flow meter; (BB) Inflow feed water on-line water quality meter; (CC) Which state is inflow feed water in?; (DD) Injecting a calculated amount of coagulating agent; (EE) First process for each state?; (FF) Injecting a pre-input amount of the coagulating agent; (GG,LL) Primary injection; (HH) Filtered water on-line water quality meter; (II) Secondary injection?; (JJ) Operation for Coagulating agent injecting concentration: secondary injection: primary injection+15%, third injection: primary injection-15%; (KK) Tertiary injection?; (MM) Selecting the optimal injection concentration of coagulating agent