Low-pressure nanofiltration membrane has high application advantages and huge industry development potential

Nanofiltration membrane refers to a functional semipermeable membrane with a pore size above 1 nm that allows solvent molecules or certain low molecular weight solutes or low-priced ions to pass through. Nanofiltration membrane has the advantages of acid and alkali resistance, microbial erosion resistance, oxidation resistance, good thermal stability, high mechanical strength, strong ability to intercept low molecules, and high water flux. It can effectively filter harmful substances in water and is used in chemical fiber, printing and dyeing, papermaking, etc. It is widely used in industrial wastewater treatment, drinking water purification, seawater desalination, food processing, chemical industry, dye purification and other fields.

Low-pressure nanofiltration membrane is an effective solution to the current problem of generally high operating pressure of nanofiltration membranes. Operating pressure is one of the key factors affecting the separation performance of nanofiltration membranes. Increasing operating pressure can increase the water flux and salt rejection rate of nanofiltration membranes. When the pressure is increased to a certain value, its salt rejection rate tends to be stable. When the pressure exceeds When it is high, the probability of membrane module damage increases and the service life is reduced. The operating pressure of traditional nanofiltration membranes is generally within 0.5-2MPa, and the operating pressure of low-pressure nanofiltration membranes is generally within 0.3-0.5MPa, which is a nanofiltration membrane with lower working pressure.

According to the “2023-2028 Low Pressure Nanofiltration Membrane Industry Market In-depth Research and Investment Prospect Forecast Analysis Report” released by the Industrial Research Center , compared with traditional nanofiltration membranes, the operating pressure of low-pressure nanofiltration membranes is reduced by more than 30%, and has better energy consumption, lifespan, adaptability, recovery rate, desalination rate, molecular weight cutoff, etc., and is used in sewage treatment and drinking water purification It has higher application advantages in other fields and has broad market development prospects.

Currently, against the background of the continuous increase in domestic industrial wastewater discharge and the rising national demand for drinking water, the sewage treatment and drinking water purification markets are developing rapidly, which has brought broad development space to the low-pressure nanofiltration membrane market. In 2022, the domestic sewage treatment market will exceed 600 billion yuan, and the drinking water purification market will exceed 50 billion yuan.

Low-pressure nanofiltration membrane is an upgraded product of traditional nanofiltration membrane. The technical barriers of the industry are relatively high. At present, the number of domestic companies in this field is relatively small. The main ones are Beijing Bishuiyuan Smart Technology, Shenzhen Erhan Technology, Hangzhou Hanmiao New Materials, Suzhou Yurun Environmental Technology, Zhejiang Meiyi Membrane Technology, Tianjin Oseco Membrane Technology, Shanghai Elon Water Treatment, Hubei Jufu Membrane Technology, Jiangsu Bishuiyuan Environmental Technology, etc.

Industry analysts said that with the continuous upgrading of enterprise technology, my country’s advanced low-pressure nanofiltration membrane results continue to emerge For example, Beijing Bishuiyuan has developed an ultra-low-pressure selective nanofiltration (DF) membrane with completely independent intellectual property rights. The pore size is 1nm, which is 1/10 of the ultrafiltration membrane. It has been implemented in the fields of advanced sewage treatment and resource utilization, and urban water supply purification. widely used. In the future, as local companies continue to increase their research and development efforts, more advanced products will continue to come out in the domestic low-pressure nanofiltration membrane market. The application fields are expected to continue to expand, and the industry has huge development potential.