③Observe the change in the difference between the displayed value of the automatic dosing equipment and the drug concentration value calculated by total phosphorus, observe for a few days, make detailed records, after a few days, the difference is large and does not reduce the trend, and modify and calibrate the drug concentration interval if necessary (taking into account the field control indicators when adjusting) until the difference is reduced to the minimum and maintained stable.

二． Experimental site and experimental equipment

2.1Experimental site

Each business site

2.2Experimental equipment

Automatic dosing equipment

三．Experimental procedure

3.1Adjust the dosing interval of automatic dosing equipment to meet the field control index.

3.2Logical verification of the displayed value of the automatic dosing equipment and the actual situation of the system.

When the system changes, whether the display value of the automatic dozing equipment can be logically corresponding to it (for example, when more agents are added manually, after a period of time, whether the display value is slightly increased; When there is no sewage and the amount of water is increased, after a period of time, the display value is slightly reduced, etc.).

3.3The automatic dosing equipment was calibrated to make its detection value basically consistent with that of the fluorescence spectrophotometer.

3.4Observe the change in the difference between the displayed value of the automatic dosing equipment and the drug concentration value calculated by total phosphorus, observe for a few days, make detailed records, after a few days, the difference is large and does not reduce the trend, and modify and calibrate the drug concentration interval if necessary (taking into account the field control indicators when adjusting) until the difference is reduced to the minimum and maintained stable. (Stable time at least half a month)

Suggestion: The early adjustment is mainly based on the fluorescence spectrophotometer, supplemented by the adjustment of the corresponding parameters of the automatic dosing equipment and calibration correction; In the later stage, the total phosphorus was mainly calculated, and the automatic dosing equipment was adjusted with the aid of fluorescence spectrophotometer every two days.

四．Experimenter

On-site technical personnel at each service point

五．Final expected effect

① Can correctly display the concentration of the agent in the system

②It can realize automatic dosing on site

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