What is the cause of the high TDS of the RO membrane produced water?

High TDS of raw water can cause high TDS value of pure water, and then there is the aging of the RO membrane, which should be replaced The general membrane can be used for two years.

Generally, the TDS 50 of the RO reverse osmosis water purifier (water purifier) is both direct drinking water and raw drinking. However, many consumers report that even if the TDS (total amount of dissolved solids in water) value of RO reverse osmosis water purifier (water purifier) is installed, it is still high, and they suspect that there is a problem with the quality of the water purifier, so what is the reason for the high TDS value of RO reverse osmosis water purifier? And how to solve it?

Causes of high TDS values:

1. There is an infiltration process when the RO membrane is first opened to water, during which a small amount of residual substances in the production of membrane materials will be dissolved in water and washed out, if wet film is used, the preservatives inside the membrane will also be dissolved in water and washed out, this process generally takes 1-2 hours, and the TDS of pure water is gradually decreasing.

2. A small amount of carbon powder and inorganic minerals in the post-activated carbon will be washed out by the argument when the water is first passed, resulting in high TDS, the solution is to fill the pressure bucket with water for the first time, and then repeatedly switch on and off the pure faucet several times, so that the pure water will wash away the impurities in the activated carbon filter element. This process takes about 1 hour.

So, what should I do if the TDS value is too high?

In China, especially in the northern region, the water quality TDS value is generally higher, the national municipal tap water is generally about 250, and the tap water and rivers and lakes in some areas are as high as five or six hundred, and the individual groundwater is up to 1,000. If the source water quality TDS value is too high, it is recommended to add a pre-position before using the RO water purifier for protection.

At the same time, for the problem that the TDS value of the RO reverse osmosis water purifier cannot be reduced, the following aspects also need to be checked:

1. First check the TDS value of the raw water, and the general R o membrane desalination rate is 90;

2. If it is a newly replaced reverse osmosis membrane, it needs to run for 20 minutes before measuring;

3. Confirm whether the purified water in the water storage bucket is stored for too long;

4. If the new post-activated carbon is replaced, it also needs to be flushed;

5. When measuring the quality of pure water, please measure it from the pure water port of the reverse osmosis membrane Dan stove;

6. After excluding the above reasons, you can consider replacing the RO reverse osmosis membrane.

High permeate TDS is most associated with two conditions.

1. The performance of the reverse osmosis membrane itself is attenuated or the TDS of the permeate is increased 2. The performance of the reverse osmosis membrane is no problem, but the TDS of the inlet water is increased, and the increase of the permeable TDS caused by it is basically these two situations.