Q: Is a 1*400GPD unit superior to 2*200GPD units?
A: Opting for 200GPD is advantageous due to minimized glue usage during production, leading to enhanced salt rejection rates and superior water flow efficiency.
Q: When should the membrane elements undergo cleaning?
A: Membrane elements require cleaning when encountering any of these specific conditions:
A 10-15% reduction in the normalized permeate flow rate.
An increase of 10-15% in normalized permeate total dissolved solids (TDS).
A 10-15% rise in the normalized pressure drop between the feed and reject streams.
Q: What are the steps to resolve RO membrane blockage?
A: 1. Begin by verifying whether the membrane within your home RO System is genuinely obstructed.
2. Analyze the regional water quality to ascertain if the scale primarily consists of calcium and magnesium salts.
3. Prepare a solution using 10% hydrochloric acid or a diluted descaling detergent available on the market. Add a specialized RO membrane cleaning agent based on the scale's composition, and immerse the RO membrane for 24 hours.
4. After soaking, thoroughly rinse the RO membrane using water produced through ultrafiltration. During this process, close the pure water outlet and only open the wastewater outlet to ensure effective flushing.
Q: Why does the RO membrane become blocked within one to two months?
A: 1. The presence of raw water with high salt levels results in excessive scale formation.
2. When the organic matter content in the water surpasses acceptable standards, it leads to RO membrane fouling and blockage.
3. A high recovery rate of the RO membrane film contributes to blockages.
4. A purifier lacking a flushing function can lead to the deposition of high-concentration brine in the RO membrane shell after extended use.