Why does reverse osmosis water purification equipment produce wastewater?
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Update time : 2025-06-10 18:09:37
Reverse osmosis water purification equipment is one of the most widely used water purification equipment on the market. It converts tap water into pure water through reverse osmosis technology to meet people's demand for high-quality drinking water. However, reverse osmosis water purification equipment will produce a certain proportion of wastewater in the water production process. Why is this?
First of all, we need to understand the principle of reverse osmosis technology. Reverse osmosis technology is a filtration technology that uses a semipermeable membrane. When tap water is subjected to a certain pressure, water molecules can pass through the semipermeable membrane, while other impurities and ions are blocked outside. In this process, in order to ensure that water molecules can pass through the semipermeable membrane smoothly, a large amount of water is needed to flush and take away the blocked impurities and ions, which produces wastewater.
Specifically, there are the following reasons why reverse osmosis water purification equipment produces wastewater:
1. In order to remove impurities and pollutants in the water, it is necessary to push water through the reverse osmosis membrane at high pressure. In this process, because the pores of the membrane are very small, only at the nanometer level, it can effectively filter out tiny particles and dissolved substances in the water. However, since the size of water molecules is also very small, part of the water will be discharged through the pores of the membrane to form wastewater. This is to ensure the quality and effect of water purification. Reverse osmosis water purifiers will inevitably produce a certain amount of wastewater.
2. The impurities and pollutants filtered out in the wastewater need to be treated. If they are not washed away in time with water, the RO membrane will be blocked and damaged, causing the membrane to lose its filtering effect. Therefore, in order to make the RO membrane work properly and extend the service life of the RO membrane, it is necessary to use water at any time to flush the intercepted impurities in time and discharge them with the water flow. The impurity concentration in this part of the water that flushes the membrane will increase and cannot be used again, and it will become wastewater.
In summary, the reverse osmosis water purification equipment produces wastewater to ensure the normal operation of the equipment and the purity of the water quality. Although the generation of wastewater is inevitable, we can reduce the discharge of wastewater through reasonable design and use. For example, optimizing the design of reverse osmosis membrane components, improving the operating efficiency of equipment, and regularly cleaning and maintaining membranes can effectively reduce the proportion of wastewater discharge.
