Q: Is a single 1*400GPD system superior to a dual 2*200GPD setup?
A: Opting for the 200GPD system offers benefits, such as reduced adhesive usage during production, thereby enhancing the salt rejection rate and improving water flow efficiency.
Q: When should membrane elements undergo cleaning?
A: It is essential to clean membrane elements under the following conditions:
When there is a noticeable 10-15% reduction in normalized permeate flow.
A marked 10-15% increase in normalized permeate total dissolved solids (TDS) indicates cleaning is needed.
A significant 10-15% rise in the normalized pressure drop between the feed and reject streams necessitates cleaning.
Q: How can RO membrane blockage be resolved effectively?
A: 1. Verify whether the home RO System's membrane is indeed obstructed.
2. Evaluate local water quality, particularly focusing on calcium and magnesium salts as primary scaling agents.
3. Prepare a cleaning solution with 10% hydrochloric acid or a diluted market-available descaling detergent, along with a specialized RO membrane cleaning agent, based on the scale composition. Soak the RO membrane for 24 hours for optimal results.
4. Rinse the RO membrane following the soak using ultrafiltration-produced water. Ensure the pure water outlet remains closed and the wastewater outlet open to guarantee effective flushing.
Q: Why does RO membrane blockage occur within one to two months?
A: 1. High salt content in raw water leads to excessive scaling.
2. Elevated levels of organic matter in water exceed standards, causing RO membrane fouling and blockage.
3. The RO film exhibits a high recovery rate, contributing to blockage.
4. The purifier lacks a flushing function, causing long-term high-concentration brine deposition in the RO membrane shell.