Removal of contaminants from reverse osmosis membrane elements

Removal of contaminants can be achieved by chemical cleaning and physical flushing, and sometimes by changing operating conditions. As a general rule, cleaning should occur when one of the following conditions occurs.
In this case,
1, under normal pressure, such as product water flow down to 10 to 15% of normal.
In this case,
2, in order to maintain the normal product water flow, the temperature correction after the water supply pressure increased by 10 ~ 15%.
In this case,
3, product water quality reduced by 10 to 15%. Salt permeability increased by 10 ~ 15%.
In this case,
4, the use of pressure increased by 10 to 15%
In this case,
5, RO of the pressure difference between the increase significantly (perhaps no instrument to monitor this sign).