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FAQs
Frequently Asked Questions
1. Water source: Depending on the water source, such as tap water, reclaimed water, river water, or groundwater, different pretreatment filtration equipment needs to be selected;
2. Regarding the requirements for effluent water quality, the reverse osmosis equipment can produce pure water with a conductivity of less than 10us. If equipment with a conductivity of 1us is required, the accuracy of the reverse osmosis system is not high enough, and an additional set of post-treatment equipment is needed;
3. The issue of concentrated water discharge. Concentrated water can generally be used for pre-treatment cleaning of some products or for miscellaneous water purposes;
4. Site issues: The reverse osmosis equipment requires a certain amount of space for placement. Depending on the size of the equipment, the required site size varies.
1. The desalination rate of reverse osmosis devices is high, with a single membrane achieving a desalination rate of up to 99%. The desalination rate of a primary reverse osmosis system can generally be stabilized at over 90%, and that of a secondary reverse osmosis system can be stabilized at over 98%;
2. Due to the effective removal of microorganisms such as bacteria, organic matter, as well as inorganic substances like iron, manganese, and silicon by reverse osmosis, the quality of the effluent water is significantly superior to that achieved by other methods;
Compared with ion exchange water purification, it reduces the cost of chemicals (such as NaOH, HCl, etc.) consumed for resin regeneration, labor costs, and expenses related to wastewater treatment caused by regeneration, as well as environmental pollution;
4. It mitigates the variations in the produced water quality caused by fluctuations in the raw water quality, thereby facilitating the stability of water quality in production. This has a positive effect on the stability of the quality of demineralized water products.
1. Conduct preliminary treatment on raw water to improve the quality of the supplied water, ensuring it meets the required standards, reduce and delay membrane fouling, and prolong its lifespan;
2. The main objects of pretreatment are microorganisms, bacteria, colloids, organic matter, heavy metal ions, solid particles, and free chlorine in the influent water. This is to meet the requirements for the influent water of the reverse osmosis device and ensure its long-term stable operation;
3. Sand filtration: Filter out sediment, impurities, suspended solids in water, and reduce the SDI (Silt Density Index) value of raw water.
4. Carbon filtration: It serves a dual purpose, namely adsorption and filtration. It removes chemical organics, heavy metals, color, odor, residual chlorine, and other impurities from tap water, thereby enhancing the taste.
1. The pre-treatment system is designed reasonably. When selecting activated carbon, measures should be taken to prevent leakage of carbon powder and contamination of the membrane; if the inlet water has high hardness, softening treatment should be carried out to prevent membrane blockage; if the inlet water has high alkalinity, attention should be paid to adjusting the pH value to prevent membrane blockage;
2. The inlet water must meet the inlet requirements of the reverse osmosis host machine, including turbidity, chlorine, hardness, colloids, etc.
3. Add scale inhibitor to prevent membrane blockage;
4. Pay attention to regularly checking the pressure of the reverse osmosis equipment (pressure before the membrane, pressure after the membrane)
5. Pay attention to the adjustment ratio of pure water and concentrated water. If the proportion of pure water is high for a long time, the membrane is also prone to clogging.
When using sodium bisulfite solution as the protective solution for reverse osmosis membranes, the concentration should be 0.5~1.0%; when using formaldehyde solution as the protective solution, the concentration should be 0.2~0.3%; the protective solution should be injected into the reverse osmosis system using a reverse osmosis membrane cleaning system.
When maintaining reverse osmosis equipment, the following points should be noted:
1. Regularly clean the filter element: The filter element of the reverse osmosis device will gradually become clogged with use, affecting water flow and water quality. Therefore, it is necessary to clean the filter element regularly, and it is recommended to clean it every 3-6 months.
2. Regularly replace the filter element: In addition to cleaning the filter element, it is also necessary to replace it periodically. Typically, the service life of the filter element in reverse osmosis equipment is 6-12 months, and it needs to be replaced based on usage conditions.
3. Regular disinfection and sterilization: Reverse osmosis equipment is prone to bacterial growth during use, thus regular disinfection and sterilization are necessary. It is recommended to conduct disinfection and sterilization every three months.
4. Prevent water leakage: The water pipes and connections of reverse osmosis equipment are prone to water leakage issues. Therefore, it is necessary to regularly check whether the pipes and connections are functioning properly, and promptly repair any issues that are found.
5. Avoid prolonged disuse: If the reverse osmosis equipment is not used for an extended period, water inside the equipment may accumulate, potentially leading to the growth of bacteria and dirt, thereby affecting water quality. Therefore, it is recommended to use the reverse osmosis equipment regularly to prevent prolonged disuse.