Q: Is a single 1*400GPD system superior to a dual 2*200GPD setup?
A: Choosing the 200GPD system offers benefits such as reduced adhesive use during production, which enhances the salt rejection rate and improves water flow efficiency.
Q: When should membrane elements undergo cleaning?
A: It's essential to clean the membrane elements if you encounter any of these conditions:
A noticeable 10-15% reduction in normalized permeate flow.
An apparent 10-15% increase in the normalized permeate total dissolved solids (TDS).
A significant 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. Start by verifying if the home RO System's membrane is genuinely blocked.
2. Examine the regional water quality, focusing on key scaling elements like calcium and magnesium salts.
3. Prepare a solution using 10% hydrochloric acid or a diluted commercially available descaling detergent, along with a specialized RO membrane cleaning agent, according to the scale composition. Soak the RO membrane for 24 hours.
4. After soaking, rinse the RO membrane using ultrafiltration-produced water. During this process, ensure the pure water outlet is closed and the wastewater outlet is open for effective 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.
2. Elevated organic matter levels in the water exceed standards, causing RO membrane fouling and blockage.
3. The RO film displays a high recovery rate.
4. The purifier lacks a flushing function, causing long-term high-concentration brine deposition in the RO membrane shell.