1Scaling pollution: excessively high recovery rate, deteriorating water quality, poor quality of scale inhibitors, unreliable addition of scale inhibitors, etc

　　2Leakage of connecting partsORing leakage, connecting parts leakage

　　3Temperature rise: As temperature rises, the salt permeability increases

　　4The increase in influent conductivity directly leads to an increase in the conductivity of the produced water and errors in the conductivity meter, etc

　　5Recovery rate increase: operational errors, instrument errors, loose salt water sealing rings, etc

　　6Reduced operating pressure: A lower operating pressure can cause an increase in conductivity. If the temperature rises, a higher operating pressure is not required

　　7Reduced performance of membrane elements: scratches on membrane elements, oxidation of membranes, damage from chemical cleaning, etc

　　8Organic matter pollution: pollution, colloidal pollution, insolubleNOMPollution, organic pollution, etc

　　9, PHAbnormal valuePHExcessively high or low values will seriously affect the desalination rate of membrane elements

　　10, Ultra-high pressure: Ultra-high pressure operation increases the salt permeability

　　11, Extended operating life: As the operating life of the membrane element extends, the salt permeability increases

　　12, The raw water contains a large amount of dissolved gases, such as free carbon dioxide gas, etc

　　Therefore, it is very difficult to determine the specific cause of the increase in electrical conductivity without a comparison. Of course, if the specific reasons are known, the conductivity of the produced water can also be reduced. For example, the following measures can be taken:

　　1, Reducing the recovery rate: Appropriately reducing the recovery rate can significantly improve the quality of the product water

　　2, Appropriately increase the operating pressure: Appropriately increasing the operating pressure can bring it closer to the optimal operating state

　　3, Appropriately lower the water temperature: For systems with heat exchangers, the feed water temperature for reverse osmosis can be appropriately reduced

　　4, Thorough and complete chemical cleaning: Chemical cleaning can remove contaminants from reverse osmosis membrane elements

　　5, "AdjustmentPHValue: For first-stage reverse osmosis, it may be for adding acid, while for second-stage reverse osmosis, it is for adding alkali

　　6, Removing free gases: Free gases can carry salts through, and effectively removing free gases may also be a solution

　　7, Partial recirculation of product water: For larger production capacity facilities, the product water can be recirculated back to the raw water to reduce the salt content of the influent

　　8, Replacing membrane elements: Systems that are damaged, have been in use for a long time, or have been damaged by chemical cleaning can be a reliable method