Q: Is a single 1*400GPD system superior to a dual 2*200GPD setup?
A: Choosing the 200GPD system is beneficial as it reduces adhesive use during production, which enhances the salt rejection rate and boosts water flow efficiency, providing an overall superior performance.
Q: When should membrane elements undergo cleaning?
A: It is essential to clean the membrane elements when encountering any of the following conditions:
A noticeable reduction of 10-15% in normalized permeate flow indicates the need for cleaning.
An increase of 10-15% in the normalized permeate TDS (Total Dissolved Solids) suggests that cleaning is necessary.
A significant rise of 10-15% in the normalized pressure drop between feed and reject streams signals the urgency for membrane cleaning.
Q: What are the steps to resolve RO membrane blockage?
A: 1. Initially, verify if the home RO System's membrane is genuinely obstructed before proceeding with further steps.
2. Assess the regional water quality, especially focusing on whether the primary scaling components are calcium and magnesium salts, which could contribute to blockages.
3. Prepare a solution using 10% hydrochloric acid or a diluted commercially available descaling detergent. Combine with a specialized RO membrane cleaning agent, tailored to the scale composition. Soak the RO membrane for 24 hours for optimal results.
4. After soaking, rinse the RO membrane using ultrafiltration-produced water. Ensure the pure water outlet is closed and the wastewater outlet is open to effectively flush out residues.
Q: Why does RO membrane blockage occur within one to two months?
A: 1. High salt content in raw water leads to excessive scaling, which can result in blockage.
2. Elevated levels of organic matter in the water surpass acceptable standards, causing RO membrane fouling and potential blockages.
3. The RO film features a high recovery rate, which can contribute to the increased likelihood of blockages.
4. The purifier lacks a flushing function, causing long-term high-concentration brine deposition in the RO membrane shell.