Q: Is a single 1*400GPD system superior to a dual 2*200GPD setup?
A: Choosing the 200GPD system is beneficial due to decreased adhesive use during production, leading to enhanced salt rejection rates and improved water flow efficiency.
Q: When should membrane elements undergo cleaning?
A: Membrane elements require cleaning upon encountering any of the following signs:
An observable 10-15% decrease in normalized permeate flow.
A noticeable 10-15% increase in the normalized permeate total dissolved solids (TDS).
A considerable 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. First, verify if the home RO System's membrane is truly blocked.
2. Evaluate the local water quality, focusing on calcium and magnesium salt concentrations.
3. Formulate a solution with 10% hydrochloric acid or a diluted commercial descaling detergent, along with a specialized RO membrane cleaning agent, based on the scale composition. Soak the RO membrane for 24 hours.
4. Rinse the RO membrane post-soaking using ultrafiltration-produced water. Ensure the pure water outlet is sealed and the wastewater outlet is open to facilitate effective flushing.
Q: Why does RO membrane blockage occur within one to two months?
A: 1. Elevated salt content in raw water leads to excessive scaling.
2. High levels of organic matter in water exceed acceptable limits, resulting in RO membrane fouling and blockage.
3. The RO film demonstrates a high recovery rate, contributing to potential blockages.
4. The purifier lacks a flushing function, causing long-term high-concentration brine deposition in the RO membrane shell.