How to avoid the bacterial growth of Dow RO reverse osmosis membrane?

1.First of all, it is necessary to maintain the daily cleaning of the reverse osmosis water treatment equipment.

2.If the equipment is out of service for half a month, the waste water pipe should be raised to the exchange column so that the water is not drained, and the salt tank and resin should be cleaned when not used for a long time, and all parts of the equipment should be prevented from rusting. The water softener to be deactivated can be regenerated, and when the brine is sucked up, the regeneration process is stopped and the water softener is sealed.

In this way, the resin is soaked in regenerated brine water, and there will be no bacteria when used in reverse osmosis equipment, and the resin will not have any effect, but the brine cannot be soaked for a long time. Because organic matter is introduced into the salt water, after a long period of soaking, the water will smell much worse than ordinary tap water. If you soak in salt water, generally do not exceed 2 months.

It is recommended to maintain it with clean water after regeneration, and it may be better if you can add an appropriate amount of sterilant, but it will have a direct impact on the life of the resin.

3.The environment should also be considered when using resins. For example, some pump rooms are in the basement, and the problem is not too big in summer with and without backwashing, while some are on the ground, and even direct sunlight can be reached, and the ambient temperature is high, so it needs to be flushed regularly.

In addition, after the water treatment equipment is stopped in summer, the stagnant water in the water pipes is also very harmful to the resin. It is recommended to drain it before rinsing as well! Especially after the pipeline is vented and repaired, some users have precipitated about 50 cm of loess in the tank, which is caused by the renovation of the external pipe network.

4.When working in water treatment equipment, do not adjust the time of the relay. Moreover, the user can not stop the machine in a short period of time without stopping the water every time it stops, and must stop the machine and the water at the same time. This helps to extend the life of the water treatment equipment.

The packaging of the reverse osmosis membrane should be complete and unopened, the color of the membrane should be bright and the label should be clear, and the reverse osmosis membrane will have a unique barcode anti-counterfeiting code, which is equivalent to the human ID number, which is unique and can be verified by the manufacturer. 1. Counterfeit and shoddy products: labels are affixed outside.

2. Refurbishment of shoddy products.

The use of ** over the ** membrane through the chemical cleaning, water output and desalination rate in the early stage and the new membrane is not much different, and then packaged into a new membrane, although it is also a ** membrane, but with the growth of time membrane performance and filtration effect compared with the new membrane will appear obvious differences, is a shoddy typical case.

1. Look at the membrane should be observed whether the membrane is complete and fresh, because some external factors may make the RO reverse osmosis membrane incomplete.

2. Smell production and external factors, will make the membrane deteriorate, some will emit a kind of strange smell, if the long-term storage is improper, it will also make the RO reverse osmosis membrane have a certain sound.

3. Inspection This is one of the best ways to identify RO reverse osmosis membranes. The water that really comes out through the RO reverse osmosis membrane has no impurities, no salt, and no minerals.

With the increase in water requirements in the industry, Dow.

RO reverse osmosis membranes.

It has excellent performance in the field of water treatment. Dow RO reverse osmosis membrane inlet water conditions meet the specified range to ensure the stable operation and service life of the reverse osmosis unit. Prevent fouling of the membrane surface, prevent fouling of colloidal substances and suspended solid particles, prevent fouling of organic substances, and prevent fouling of microorganisms.

So as to ensure that the water production of Dow RO reverse osmosis membrane is stable and the water quality is up to standard. Then, the Dow RO reverse osmosis membrane inlet water and produced water are both.

What is the relationship?

1. The inlet water pressure is the produced water.

Operate according to the designed reference pressure, such as the increase of inlet pressure increases the net pressure of driving reverse osmosis, increases the water production, and at the same time, the salt permeability almost does not increase the water production dilutes the salt of the permeable membrane, reduces the salt permeability rate and improves the desalination rate. When the inlet water pressure exceeds a certain value, due to the excessively high ** rate.

Increasing the concentration polarization will lead to an increase in salt permeability, which will offset the increased water yield and make the desalination rate no longer increase.

2. The inlet water temperature does not meet the operating range of Dow RO reverse osmosis membrane.

Operate according to the design temperature of 25 degrees, the closer the actual operation problem is to the water production, the more guaranteed, and the usable range is 5-45. As the water temperature increases, the water flux pairs.

It also increases linearly, and the water yield increases for every 1 increase in inlet water temperature.

3. Inlet water pH value.

The pH value of the influent water has almost no effect on the water yield, but has a great effect on the desalination rate.

4. Effect of influent salt concentration on Dow RO reverse osmosis membrane.

Osmotic pressure. It is a function of the concentration of salt or organic matter in the water, and the higher the salt content of the influent water, the greater the concentration difference, and the salt permeability increases, resulting in a decrease in the desalination rate.

5. Mixing of inlet water and oil.

Note: Oil must never enter the feed water to replace the membrane module.

6. Water ingress. Residual chlorine.

Free chlorine) is easy to oxidize the Dow RO reverse osmosis membrane, resulting in a decrease in the desalination rate of the DOW RO reverse osmosis membrane and the water production is not up to standard. Therefore, the Dow RO reverse osmosis membrane feed water should not contain residual chlorine.

Dow RO reverse osmosis membranes are particularly important in water treatment equipment, and an in-depth understanding of the relationship between Dow RO reverse osmosis membrane inlet water and produced water should be understood at the beginning of design and operation. In order to fully understand the operating costs and system maintenance essentials in the later stage, rather than blindly pursuing high water production.

1.Do a good job in the pretreatment of raw water, especially pay attention to the qualification of the pollution index, and at the same time, sterilization should be carried out to prevent the breeding of microorganisms in the vessel.

2.In the operation of reverse permeability equipment, it is necessary to maintain the appropriate operating pressure, in general, increasing the pressure will increase the water production, but too much will make the membrane compact.

3.In the operation of reverse osmosis equipment, the turbulent flow state on the brine side should be maintained to reduce the concentration polarization of the solution on the membrane surface and avoid the precipitation of some insoluble salts on the membrane surface.

4.When the water yield of the reverse osmosis plant is significantly reduced, it indicates that the membrane is scaled or fouled and should be cleaned.