Nanofiltration membranes are widely used in high-quality drinking water treatment, wastewater resource utilization, and separation of valuable materials. However, non-woven fabrics and polysulfone, the key raw materials of nanofiltration membranes, are highly dependent on imports, which is a "bottleneck" technology.
China's leading microfiltration and ultrafiltration membrane manufacturer: NJBS Filtration Technology Group, after 3 years of technological innovation and research, invested 200 million yuan, successfully developed PENF high-efficiency selective nanofiltration membrane technology. The newly-built PENF high-efficiency and selective nanofiltration membrane production line successfully realized commercial production.
NJBS is a pioneer and promoter of China's membrane technology. The company has realized the industrialization of nanofiltration membranes since 2014. It is widely used in tap water, household water purification, sewage recycling, industrial wastewater, and material purification and recycling. Knowing that the key raw materials of nanofiltration membranes, non-woven fabrics and polysulfone, are highly dependent on imports, which is a "bottleneck" technical problem. NJBS produced a new type of nanofiltration membrane product by cross-fusing the lithium battery industry technology and water treatment technology, replacing the non-woven fabric and polysulfone in the production of nanofiltration membranes with PE membranes for domestic lithium batteries, and was the first to establish a PE membrane-based product. The membrane’s nanofiltration membrane production line realizes large-scale production with an annual production capacity of 5 million square meters, effectively alleviating the “bottleneck” problem of imported raw materials such as non-woven fabrics and polysulfone.
According to NJBS research and development experts, because the shark skin-like bionic structure is formed on the surface of the PENF membrane, the micro-turbulence generated during use can make it self-cleaning and has good anti-pollution properties. At the same time, based on the high strength and good chemical stability of the PE base membrane, it overcomes the problem of inadequate combination of conventional nanofiltration membranes. In the process of membrane preparation, precise chemical control is used to achieve high-efficiency and selective separation of PENF nanofiltration membranes. In addition, in the structure of the nanofiltration membrane, the thickness of the membrane material used in lithium-ion batteries is only one-sixth of that of the traditional non-woven fabric/polysulfone composite layer. Therefore, the new PENF nanofiltration membrane has an ultra-thin Features, can form a higher packing density of the nanofiltration membrane element, and has a higher water flux, and has the advantages of high performance and small footprint.
Experts in the industry pointed out that as a disruptive product, the PENF nanofiltration membrane developed by NJBS has the characteristics of high selectivity, high flux, anti-pollution, and solvent resistance. Due to the sufficient supply of low-cost domestic PE membranes, this The new product is also about 30% lower in cost than traditional nanofiltration membranes. The establishment of a high-performance PENF nanofiltration membrane production line will promote industrial transformation. At present, the product has been successfully applied to household water purifiers and double-membrane tap water treatment, and it also has great application potential in the production process of sewage resource utilization, chemical and biological products.
About BJBS
BJBS has built Asia`s largest Membrane R&D center, and production base.
The core technologies and products include microfiltration (MF), ultrafiltration (UF), nanofiltration (DF), reverse osmosis (RO), membrane bioreactor (MBR), membrane bioreactor-nanofiltration (MBR-DF),Intelligent Compact Wastewater Treatment System (ICWT ) and integrated urban wastewater purification membrane technology.