Monitoring system and monitoring method

A monitoring system comprising:

• a reaction tank to which a solution is supplied;
• an indicator burette that drops an indicator into the reaction tank;
• a reagent burette that drops an acidic reagent into the reaction tank;
• an absorptiometry detector that is immersed in the solution;
• a measurement device that controls the indicator burette, the reagent burette, and the absorptiometry detector, and analyzes transmittance of the solution detected by the absorptiometry detector to measure an alkaline degree of the solution;
• a first system that collects a sample of alkaline treatment liquid from a treatment tank storing the treatment liquid and supplies the sample to the reaction tank as the solution;
• a discharge system that discharges the solution from the reaction tank to a waste liquid container;
• and
• a control device, wherein
• the first system includes:
• the treatment tank;
• a measuring pipe;
• a diluted solution container;
• the reaction tank;
• a first pipe connecting the treatment tank and the measuring pipe;
• a second pipe connecting the measuring pipe and the reaction tank;
• a third pipe connecting the measuring pipe and the waste liquid container;
• a fourth pipe connecting the measuring pipe and the waste liquid container;
• a first pump that is provided to the first pipe, and draws in the treatment liquid from the treatment tank and sends out the treatment liquid to the measuring pipe;
• a second pump that is provided to the third pipe, and draws in the treatment liquid sent out from the first pump to the measuring pipe;
• a third pump that is provided to the fourth pipe, and draws in a diluted solution stored in the diluted solution container and sent out the diluted solution to the measuring pipe;
• the control device
• operates the first pump, and further operates the second pump for a predetermined time to draw in a predetermined amount of the treatment liquid required for measurement to the measuring pipe, and thereafter, by operating the third pump to send out the diluted solution to the measuring pipe, provides the treatment liquid drawn in to the measuring pipe and the diluted solution to the reaction tank as the solution through the second pipe, and outputs a completion signal to the measurement device when supply of the solution to the reaction tank is completed, and
• controls the discharge system to discharge the solution from the reaction tank when measurement of the alkaline degree by the measurement device is completed,
• wherein the solution is monitored based on the alkaline degree of the solution which is measured.