Q: Is a single 1*400GPD system superior to a dual 2*200GPD setup?
A: Choosing the 200GPD system is beneficial due to its reduced adhesive usage during production, which significantly enhances the salt rejection rate and optimizes water flow efficiency for superior performance.
Q: When should membrane elements undergo cleaning?
A: Cleaning membrane elements is essential when the following conditions are observed:
A noticeable reduction of 10-15% in normalized permeate flow.
A marked increase of 10-15% in normalized permeate total dissolved solids (TDS).
A significant rise of 10-15% in the normalized pressure drop between the feed and reject streams.
Q: What are the steps to resolve RO membrane blockage?
A: 1. Verify if the home RO System's membrane is indeed obstructed, ensuring an accurate diagnosis.
2. Evaluate regional water quality, focusing on whether calcium and magnesium salts are the primary scaling components.
3. Prepare a solution using 10% hydrochloric acid or a diluted, commercially available descaling detergent, complemented by a specialized RO membrane cleaning agent. Immerse the RO membrane for a thorough 24-hour soak, tailored to the scale composition.
4. After soaking, rinse the RO membrane using ultrafiltration-produced water. During rinsing, ensure that the pure water outlet is closed and the wastewater outlet is open to facilitate 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, necessitating frequent maintenance.
2. Elevated organic matter levels in water exceed acceptable standards, causing RO membrane fouling and subsequent blockage.
3. The RO membrane displays a high recovery rate, which may contribute to increased blockage if not properly managed.
4. The purifier lacks a flushing function, causing long-term high-concentration brine deposition in the RO membrane shell.