Q: Is a single 1*400GPD system superior to a dual 2*200GPD setup?
A: The 200GPD system is preferable owing to its minimal adhesive usage during production, which significantly enhances the salt rejection rate while optimizing water flow efficiency.
Q: When should membrane elements undergo cleaning?
A: It's imperative to clean the membrane elements under the following circumstances:
A noticeable 10-15% reduction in normalized permeate flow, indicating a need for cleaning.
A marked 10-15% increase in the normalized permeate total dissolved solids (TDS), necessitating maintenance.
A significant 10-15% rise in the normalized pressure drop between the feed and reject streams, signaling the requirement for cleaning.
Q: What are the steps to resolve RO membrane blockage?
A: 1. First, verify if the home RO System's membrane is indeed obstructed, ensuring accurate diagnosis.
2. Evaluate the local water quality, especially if primary scaling components like calcium and magnesium salts are present.
3. Formulate a solution with 10% hydrochloric acid or a diluted commercial descaling detergent, complemented by a specialized RO membrane cleaning agent, tailored to the scale composition. Soak the RO membrane for 24 hours to effectively dissolve the blockage.
4. After soaking, rinse the RO membrane thoroughly using ultrafiltration-produced water. During rinsing, ensure the pure water outlet remains closed while the wastewater outlet is open for optimal flushing.
Q: Why does RO membrane blockage occur within one to two months?
A: 1. High salt content in the raw water leads to excessive scaling, causing blockages.
2. Elevated levels of organic matter in the water exceed acceptable standards, resulting in RO membrane fouling and subsequent blockage.
3. The RO film has a high recovery rate, contributing to frequent blockages.
4. The purifier lacks a flushing function, causing long-term high-concentration brine deposition in the RO membrane shell.