English
简体中文
Home
Products
Commercial water purifier
Household water purifier
Water treatment equipment
Industrial water treatment accessories
Air Purifier
Case
Case Example
Feedback
News
About Us
English
Home
Products
commercial water purifier household water purifier water treatment equipment industrial water treatment accessories air purifier
Case
case example
Feedback
News
About Us
en
简体中文
Water purification industry information
Home > Water purification industry information

Introduction of various indexes of reverse osmosis membrane

Views : 38513
Update time : 2021-09-27 17:47:07
1. Desalination rate and salt permeability of reverse osmosis membrane
reverse osmosis membrane

Salt permeability = product water concentration / influent water concentration × 100%

Desalination rate = (1-salt content of product water / salt content of influent water) × 100%

Salt penetration rate = 100%-desalination rate

The desalination rate of the membrane element is determined when it is manufactured and formed. The desalination rate depends on the density of the ultra-thin desalination layer on the surface of the membrane element. The denser the desalination layer, the higher the desalination rate and the lower the water production.

The desalination rate of different substances by reverse osmosis is mainly determined by the structure and molecular weight of the substance. The desalination rate of high-valent ions and complex monovalent ions can exceed 99%, and the desalination rate of monovalent ions such as sodium ions, potassium ions, and chloride ions is slightly lower. , But it also exceeds 98%; the removal rate of organics with a molecular weight greater than 100 can also exceed 98%, but the removal rate of organics with a molecular weight of less than 100 is low.

2. Water production of reverse osmosis membrane
reverse osmosis membrane
Water production-refers to the water production capacity of the reverse osmosis system, that is, the amount of water permeating the membrane per unit time, usually expressed in tons/hour or gallons/day.

Permeation flow rate-is also an important indicator of the water production of reverse osmosis membrane elements. Refers to the flow rate of permeate per unit membrane area, usually expressed in gallons per square foot per day (GFD). Too high permeate flow rate will cause the water velocity perpendicular to the membrane surface to increase, which will aggravate membrane fouling.

3. Recovery rate of reverse osmosis membrane

Recovery rate-refers to the percentage of feed water converted into product water or permeate in the membrane system. Depends on the pretreatment influent water quality and water requirements. The recovery rate of the membrane system has been determined at the time of design,

Recovery rate = (product water flow/influent flow) × 100%

For large RO systems, the recovery rate is usually limited by the tendency of insoluble salt to foul, that is, by the maximum concentration of concentrated water; for small RO systems, the recovery rate is usually less than 30% to 50%. When the recovery rate is low, the RO device can operate safely without controlling the solubility of insoluble salts. Cost is usually not a priority for small RO systems.
Previous :
Next :
Related News
Read More >>
Pattern｜Analysis of market consumption status and competition pattern of water purifier industry Pattern｜Analysis of market consumption status and competition pattern of water purifier industry
Jul .02.2022
Especially with the upgrading of consumption, users not only continuously improve the water purification performance requirements of products
Which water purifier franchise manufacturer is good? Aicksn water purifier cooperates with you for a win-win situation Which water purifier franchise manufacturer is good? Aicksn water purifier cooperates with you for a win-win situation
Jul .02.2022
In recent years, joining the water purifier industry is a kind of entrepreneurship, and choosing a good brand to join can save many detours on the road to entrepreneurship. So which water purifier franchise manufacturer is good?
How to choose a reliable household water purifier? Here comes the water purifier buying guide How to choose a reliable household water purifier? Here comes the water purifier buying guide
Jun .30.2022
With the continuous improvement of people's health awareness.The requirements for the quality of drinking water are getting higher and higher.All kinds of household water purifiers have also entered thousands of households.
Is it safe to use a reverse osmosis water purifier for drinking water? Is it safe to use a reverse osmosis water purifier for drinking water?
Jun .30.2022
The Environmental Institute of the Chinese Center for Disease Control and Prevention pointed out: home protection, use reverse osmosis water purifiers to ensure the safety of drinking water.
Xiamen Ouge Digital Technology Co., Ltd
en
简体中文
Susan Susan
Susan