Redfil Nano Filter System Manufacturers Industrial Water Recycling NF Membrane China Lnf 8040 Large Aperture Nanofiltration Membrane for Wastewater Treatment

• Customization: Available
• Membrane Type: Hollow
• Type: NF
• Model NO.: LNF 8040
• Condition: New
• Material: Modified Polyethersulfone Composite Membrane
• Weight: 13.5kg
• R(Mg2+): >98%
• R(Li+): <-15%
• Characteristic: High Chlorine Resistance, Antibacterial
• Stable Desalting Rate(%): >97%
• Applicable Industries: Water Treatment
• Productivity: Depend on Actual Situation
• Effective Membrane Area FT2(M2): 400.0 (36.40)
• Ave. Permeate Gpd M3/D: 10831(41.00)
• Transport Package: Standard Shipping Packaging or Customized
• Specification: 1150*220*250mm
• Trademark: REDFIL
• Origin: Jiangshu, China
• HS Code: 85122010
• Production Capacity: 100000

Product Description

REDFIL Nano Filter System Manufacturers Industrial Water Recycling NF Membrane China LNF 8040 Large Aperture Nanofiltration Membrane For Wastewater Treatment

Product Description

LNF spiral-wound NF series Nanofiltration (NF) Membrane

The LNF spiral-wound NF series features polyamide as its primary membrane material, with molecular weight cut-off (MWCO) exceeding 500 Da. This series effectively eliminates pollutants, suspended
solids, high molecular weight impurities, bacteria, and more from water, while retaining essential minerals. Its separation performance surpasses that of imported products. Characteristic: High flux; Thermal stability; Excellent separation performance.



Applications: The membrane is suitable for landfill leachate treatment, municipal water treatment, suspended solids/virus removal, dye desalination/concentration, household water purification, chemical
industrial wastewater treatment, whey desalination, etc.

 

Product Parameters

 

Model	a(inch)	b(inch)
1812	12.0	1.8
2540	40.0	2.5
4040	40.0	4.0
8040	40.0	8.0

 

Model	LNF-1812	LNF-2540	LNF-4040	LNF-8040
Effective Membrane Area ft²(m²)	4.20(0.38)	23.68(2.20)	92.40(8.40)	400.0(36.40)
Ave.Permeate GPD (m³/d)	114(0.43)	655(2.48)	2499(9.46)	10831(41.00)
Stable Rejection	>97%(2000  ppm  MgSO4)
Feed Spacer Thickness mil(mm)	31(0.79)
Testing Conditions: All data is collected under operating pressure of 0.69 MPa,25ºC, and pH7.
Membrane Parameters:Pore diameter:0.7 nm,MWCO>500 Da,PWP:8-10 LMH/bar
Usage Conditions: Max. operating pressure:600 psi, Max.operating temperature:45ºC,pH value range of feed water during continuous operation:3-11,Allowable concentration of free chlorine:<100 ppm
Notes:1.The permeate flow of a single membrane element may vary within the range of±15%;2. The daily cleaning of the membrane module is usually water flushing, and chemical cleaning (acid /alkali cleaning)is needed every 10 to 60 days.

Loose nanofiltration (LNF) is a promising technology for advanced treatment of drinking water, primarily owing to the potentially high rejection of natural organic matter (NOM) and high passage of mineral salts, particularly divalent cations, along with the low operating pressure. This study was devoted to relating the performance with the properties of LNF membranes and obtaining the membrane properties most suitable for drinking water treatment. 

The rejection characteristics for mineral ions by LNF membranes were similar to the relatively dense conventional NF membranes, but with a lower rejection difference among the ions, manifesting less strong co-ion and counter-ion competition effects. The LNF membranes with an MWCO of ∼1000 Da could satisfactorily remove (>80%) disinfection byproduct precursors, with small-sized protein-like and other substances remaining in the permeate water. This study helps to understand the rejection characteristics and mechanisms of LNF membranes, which will benefit the synthesis of high-performance LNF membranes for drinking water treatment and other applications.
LOW ENERGY CONSUMPTION
Min working pressure:65PSl.Saving more energy
RETAIN MINERALS
The Nanofiltration Membrane Can Remove Heavy Metals
antibiotics and other harmful substances that are soluble in water while retaining parts of minerals that are necessary for human health such as Mg2+, Na+, K+, Ca2+

Nanofiltration Membrane
Customized Preparation of High-precision NF Membranes

* "Molecular Encapsulation" Technology

Drawing inspiration from controlled-release mechanisms in pharmaceuticals, the company pioneered the concepts of "molecular encapsulation" and "nanocapsules" in membrane technology. By encapsulating functional modifiers and orchestrating their release at precise intervals, we can achieve synchronized structural adjustments and functional enhancements in membranes.
By leveraging the innovative "Molecular Encapsulation" Technology, precise control over membrane pore size and charge enables the tailored production of nanofiltration membranes for effective ion separation across various systems.

High-performance Hollow Fiber NF Membranes

* Hierarchical Structure Synchronous Construction Technology
Commencing with an exploration of polymer chemical structures, molecular simulations, and solubility parameter calculations were employed to quantify polymer compatibility. This approach theoretically overcomes the challenge of interface compatibility in bilayer membranes. Through co-extrusion and the integration of composite structures from two different materials, a significant reduction in membrane material costs and streamlined membrane preparation processes have been achieved.

* Solve interface compatibility issues and ensure stable operation under harsh conditions
* Significantly simplify the membrane preparation process

Company Profile

 

The company has a research and development and production area of nearly 2,000 square meters, production equipment, analysis and testing instruments with a total value of nearly 10 million yuan, and has built a full-chain industrialization platform for the research and development, pilot production, production and testing of core products such as flat roll nanofiltration membranes and hollow fiber nanofiltration membranes.

The company's R&D team has focused on nanofiltration membrane research for more than ten years. With its unique "molecular encapsulation" patented technology, it has developed high-precision nanofiltration membranes that can quantitatively control membrane pore size and charge. In addition, it continues to launch special nanofiltration membrane products such as acid-resistant membranes, alkali-resistant membranes, solvent-resistant membranes, and high-temperature-resistant membranes for different application scenarios, which have been successfully applied in drinking water purification, biomedicine purification, industrial wastewater treatment, salt lake lithium extraction, and other fields.

Production Workshops

Application Area

Application Range:

Applicable to laboratory pure water machine, high-purity water preparation in the electronic chemical industry, water softening, seawater desalination, precious metal recovery, COD ammonia nitrogen removal, fermentation liquid concentration, drinking water treatment
Salt lake lithium extraction, high-salt wastewater resource utilization, landfill leachate, biomedicine, pesticide wastewater treatment, coal chemical wastewater treatment, household water purification, municipal water treatment

 

FAQ

Q1: What are the features of NF?
Highly Precise Separation
Low Energy Consumption
Convenient Operation
Fouling resistant
Long service life

Q2: What service is available in your company?
The products cover NF membrane elements and processes with various materials and MWCOs. Weihua provides solutions based on NF membranes for wastewater recycling, material separation, etc. globally. Our service covers multiple fields such as the chemical industry, biomedicine, environmental protection, and energy. Our products are applied in household water treatment, municipal water treatment, lithium extraction from salt lakes, zero discharge of high salt wastewater, purification and concentration of high-value products, organic solvent recovery, and material separation under harsh acid systems. We undertake sewage treatment and zero discharge resource utilization projects in the pharmaceutical, electronics, food, textile, papermaking, and landfill leachate treatment industries.

Q3: What does the Salt Rejection Ratio mean?
The Salt rejection describes the quality of salt removed from the NF membrane feed water stream as a percentage. It's one of the key elements of the NF membrane quality, however, other essential elements such as NF membrane performance durability, stability, application scope in different regions, and permeate flow output at the same pressure will all be important factors to judge the quality of the membrane.

Q4: How to select NF?
Firstly, check for the presence of corrosive substances, such as solvents, acids, and bases, in the separation system. If any are found, it is necessary to select special separation membranes. Next, determine the size of the substance to be separated and accordingly choose from the available NF membranes, categorized as LNF (large), MNF (medium), and SNF (small) models.

Q5: Under what circumstances can hollow fiber NF membranes be chosen?
High presence of organic contaminants
High residual chlorine content
Limited factory space
Municipal tap water treatment

Q6: What are the precautions when using NF?
1. Before use, pre-treatment is necessary to reduce fouling, scaling, and membrane degradation, thereby enhancing the operational efficiency of NF membrane elements.

2. Before use, the system should be flushed with purified water or product water for approximately 30 minutes.

3. The NF membrane elements are shipped with stored preservative solution, which consists of a sodium bisulfite (NaHSO3) water solution with a concentration of 0.5-1%. The pH value of the preservative solution should be tested every month, and if the pH≤3, the preservative solution should be promptly replaced.

4. Membrane components that are temporarily not in use should be sealed after being filled with a preservative solution. They should be stored in a flat, clean area on the ground, free from corrosive and contaminating substances, and kept away from indoor cold and heat sources. The storage environment temperature should be controlled within the range of 5-40ºC, with the recommended optimal storage temperature being 15-30ºC

Q7. Are you a factory?
Yes, we are not only just a factory but also have a professional service team, that includes sales, technical staff, QC, after-sales staff, etc.

Q8. How about your delivery time?
Generally, it will take one week after receiving your advance payment. The specific delivery time depends on the items and the quantity of your order.

Q9. Do you test all your goods before delivery?
Yes, we have 100% test before delivery.