EQUIPMENT FOR CONTROLLING CONCENTRATION OF DISSOLVED OXYGEN IN AERATING TANK

摘要

PROBLEM TO BE SOLVED: To provide equipment for controlling an aerating tank which can stabilize the concentration of dissolved oxygen in the aerating tank to provide stable treatment performance even if the quality of inflowing water changes. SOLUTION: This equipment for controlling the concentration of dissolved oxygen in the aerating tank for treating wastewater includes a flowmeter and control valve for the raw water fed to the aerating tank, a return sludge flowmeter, a dissolved oxygen analyzer, a pressure sensor for the pressure in the aerating tank, a pressure control valve and pressure controller, an oxygen feed rate control valve and measuring instrument, a predictive PID controller for predicting and controlling the concentration of the dissolved oxygen, and an oxygen feed rate controller.