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This post was last edited by hesonchang214 on 2020-2-25 09:05. 1. Service life of reverse osmosis membranes: Reverse osmosis membranes are the most expensive components in a system, and their service life determines the operating costs of the entire system. Under normal circumstances, membrane elements can last more than three years, provided that the system is properly configured, operated correctly, the components are replaced in a timely manner, and the membrane elements are cleaned and maintained regularly as needed. 2. Increase in conductivity of the effluent water: It is necessary to keep a record of the equipment’s conditions at regular intervals. If the conductivity rises gradually and the desalination rate decreases slightly, this is considered normal; in such cases, appropriate measures should be taken based on the reasons for the increase in conductivity. If, however, the conductivity rises suddenly, it is necessary to check whether there is damage to components, significant changes in the quality of the raw water, or failures in certain pre-treatment processes. 3. After washing the reverse osmosis membrane, there is little change in water quality: a) Whether the membrane element is damaged; b) Whether a certain pretreatment agent has lost its effectiveness. 4. During membrane washing, it is not clear what type of contaminants are present on the membrane element or to what extent, making it difficult to apply the appropriate corrective measures. 5. Excessive system pressure difference: Depending on the type of membrane elements used, the system’s pressure difference should be kept within a reasonable range to prevent damage to those membrane elements. 6. Low utilization rate of raw water and excessive discharge of concentrated water: whether the inflow flow rate is sufficient, whether the pressure meets the operating conditions specified in the data, and whether the equipment specifications are reasonable, etc.