[Hongjie Water Service] Guidelines for High and Low Pressure Selection of Reverse Osmosis Membranes

Have you ever thought about how the water we drink every day is purified? In purified water, reverse osmosis membranes play a very important role. So, do you know the difference between low-pressure reverse osmosis membranes and high-pressure reverse osmosis membranes? Hurry up and investigate!

Firstly, let's understand the principle of reverse osmosis membranes. Reverse osmosis membrane is an artificial polymer material that can filter impurities such as ions, molecules, and microorganisms in water, thereby achieving the goal of purification. Applying pressure at both ends of the reverse osmosis membrane causes water to flow from the high concentration side to the low concentration side, which is the principle of reverse osmosis.

So, what is the difference between low-pressure reverse osmosis membranes and high-pressure reverse osmosis membranes?

Reverse osmosis membrane is one of the important innovations of modern technology, which can filter impurities in water, purify water quality, and provide better protection for water use in daily life. When choosing reverse osmosis membranes, they are generally divided into two categories: high-pressure reverse osmosis membranes and low-pressure reverse osmosis membranes. So, how to choose a suitable reverse osmosis membrane for oneself?

There is a significant difference between high-pressure reverse osmosis membranes and low-pressure reverse osmosis membranes. The most obvious feature of high-pressure reverse osmosis membranes is that they require a pump to increase the water pressure to 200-400psi in order to function properly. The operating pressure of low-pressure reverse osmosis membranes is relatively low, generally between 30-60psi. Therefore, compared to high-pressure reverse osmosis membranes, low-pressure reverse osmosis membranes have lower energy consumption, lower maintenance costs, and lower operational difficulty.

In addition, high-pressure reverse osmosis membranes and low-pressure reverse osmosis membranes also have different water treatment effects. Due to the higher requirements for water quality, high-pressure reverse osmosis membranes have certain requirements for hardness, pH value, and bacteria in order to achieve better water treatment results. Low pressure reverse osmosis membrane, due to its low operational difficulty and low water quality requirements, can achieve good treatment results even when water quality requirements are not high.

In practical use, if your water quality is poor, you have high requirements for water treatment (such as purifying seawater), or you need to handle a large amount of water resources, then high-pressure reverse osmosis membranes will be a more reliable choice. Because high-pressure reverse osmosis membranes have stronger filtration effects and contain fewer impurities.

On the contrary, if your water quality is good, your requirements for water quality are not high, and you want to save the trouble of operation and maintenance, then a low-pressure reverse osmosis membrane will be the best choice.

The advantage of low-pressure reverse osmosis membranes is that they have higher water production and lower working pressure, making them more energy-efficient. However, its disadvantage is that the wastewater ratio is relatively high and the removal effect of dissolved organic compounds in water is poor. High pressure reverse osmosis membrane can overcome these drawbacks by generating higher water flux and achieving better removal of dissolved organic compounds in water. However, due to the high working pressure, the energy consumption of high-pressure reverse osmosis membranes is also relatively high.

In practical applications, high-pressure reverse osmosis membranes are more suitable for treating water sources containing a large amount of organic matter and impurities. For example, in some areas with poor water quality, high-pressure reverse osmosis membranes can effectively filter harmful substances in water, providing purer drinking water. In addition, high-pressure reverse osmosis membranes are widely used in fields such as seawater desalination and industrial wastewater treatment.

When choosing low-pressure reverse osmosis membranes and high-pressure reverse osmosis membranes, we need to consider different application scenarios and requirements. Low pressure reverse osmosis membrane is suitable for treating situations where there are fewer suspended substances in water and the quality of the water source is good. Due to its relatively low operating pressure, it is more suitable for energy conservation and environmental protection needs. High pressure reverse osmosis membranes are suitable for treating water with high levels of suspended solids and dissolved solids. Their operating pressure is high and can effectively remove dissolved substances and microorganisms. Choosing a suitable reverse osmosis membrane also takes into account factors such as water quality, cost of water sources, and effectiveness of water treatment. Therefore, when selecting low pressure and high pressure reverse osmosis membranes, we should evaluate and select them based on specific circumstances. Only in this way can we ensure efficient, energy-saving, and sustainable results in the water treatment process.

In summary, low-pressure reverse osmosis membranes and high-pressure reverse osmosis membranes have their own advantages and disadvantages, and the choice of which type of reverse osmosis membrane to use depends on the actual application scenario. Regardless of the type of reverse osmosis membrane you choose, the ultimate goal of using reverse osmosis membranes is to protect our water safety and improve our quality of life.

The above is the "High and Low Pressure Selection Guidelines for Reverse Osmosis Membranes" introduced by Hongjie Water, hoping to be helpful to you. Before purchasing equipment, we need to have a certain understanding of its composition, then understand its characteristics and defects, and make a comprehensive selection.