Q: Is a configuration of 1*400GPD superior to 2*200GPD?
A: Opting for 2*200GPD units is advantageous as it involves less glue in production, ensuring a higher salt rejection rate and improved water flow, enhancing overall performance.
Q: When should the membrane elements undergo cleaning?
A: Timely cleaning of the membrane elements is crucial when any of the following conditions are observed:
A reduction of 10-15% in the normalized permeate flow.
An increase of 10-15% in normalized permeate total dissolved solids (TDS).
An increase of 10-15% in the normalized pressure drop between feed and reject.
Q: What are the steps to resolve RO membrane blockage?
A: 1. Initially, confirm whether the membrane in the home RO System is genuinely blocked.
2. Analyze the regional water quality to determine if the main scaling components are primarily calcium and magnesium salts.
3. Prepare the cleaning solution using 10% hydrochloric acid or a diluted market-available descaling detergent and a specialized RO membrane cleaning agent according to the scale composition. Submerge the RO membrane in this solution for 24 hours.
4. Following the soaking period, thoroughly rinse the RO membrane using water produced by ultrafiltration. Ensure to close the pure water outlet and open the wastewater outlet during flushing.
Q: Why does the RO membrane experience blockage within one to two months?
A: 1. The raw water contains a high salt content and excessive scale formation.
2. The water's organic matter content exceeds the standard, causing fouling and plugging of the RO membrane.
3. A high RO film recovery rate contributes to blockage.
4. The absence of a flushing function in the purifier results in high-concentration brine accumulation in the RO membrane shell over time.