Daily maintenance of membrane system

Classification:

Release Date:

2023-09-08

Source:

Once the membrane system is put into operation, theoretically it should continue to operate continuously under stable operating conditions. In fact, it is necessary to frequently start and stop the operation of the membrane system. Each start and stop involves a sudden change in system pressure and flow rate, which generates mechanical stress on the membrane components.

Therefore, the number of starts and stops of system equipment should be minimized as much as possible, and the normal start and stop process should also be as smooth as possible. In principle, the starting method should be the same as the steps for the first operation.

 

 

Pre processing operation record

1. The routine pre-treatment operation record includes the following content, at least once per shift.

2. The pressure drop of all filters, used to determine whether to backwash, wash, or air wash;

3. Inlet pressure, residual chlorine concentration, pH value, temperature, and microorganisms;

4. Record of filter backwashing, washing, and gas washing time;

5. Effluent SDI value, residual chlorine, turbidity pH value, and microorganisms;

6. The consumption of chemicals (such as flocculants, coagulants, acids, etc.);

7. Any malfunctions or shutdowns, etc.

 

Membrane system operation record

The regular membrane system operation record includes the following content, at least once per shift.

1. Operation date, time, and system operating hours;

2. Pressure drop before and after the security filter and each section of pressure vessel (membrane component);

3. The pressure of inlet water, produced water, and concentrated water in each section;

4. Flow rate of produced water and concentrated water in each section;

5. Measure the conductivity of each section of inlet water, produced water, and concentrated water, and measure the conductivity of each pressure vessel's produced water once a week;

6. TDS of salt content in each section of influent, produced, and concentrated water;

7. pH values of influent, produced, and concentrated water;

8. SDI and turbidity values of influent water;

9. Inlet water temperature;

10. When the TDS of concentrated water is less than 10000mg/L, the Langley saturation index (LSI) value of the last section of concentrated water, or when the TDS of concentrated water is greater than 10000mg/L, the Steven David stability index (S&DSI) value of the last section of concentrated water;

11. Regularly calibrate the instrument at least once every three months.

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