FLOCCULATING AGENT INJECTION CONTROL SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a flocculating agent injection control system which is capable of dealing with an abrupt change in water quality, does not depend upon the experience of an operator in running and setting of parameters and has high reliability. SOLUTION: This flocculating agent injection control system has raw water turbid matter charge quantity estimating means 1 for estimating the charge quantity on the surfaces of the turbid matter particles included in the raw water and post-flocculation charge state measuring means 2 for measuring the charge state after the flocculating agent injection. A basic flocculating agent injection rate is calculated in a flocculating agent injection rate setter 10 according to the charge quantity on the surfaces of the turbid matter particles included in the raw water. The flocculating agent injection rate setter 10 determines the actual injection rate by correcting the basic flocculating agent injection rate according to the charge state after the flocculating agent injection and controls a flocculating agent injection machine 11.