Industrial water purifier Nanofiltration Nano NF Water Treatment membrane 8040 / 4040
- Category: >>>
- Supplier: Nanjing Weihua Membrane Technology Co. Ltd.Nanjing Ltd.
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Product Overview
Description
Introduction: The MNF spiral-wound NF series incorporates advanced support layer and
selective layer collaborative regulation technology, along with a high-flux design. Primarily
utilizing polyamide as the main membrane material, with quantitative regulation of molecular
weight cut-off (MWCO) ranging from 200 to 400 Da. This series operates efficiently at low
pressure, achieving a single module recovery rate of approximately 15%. It excels in removing
diverse impurities from wastewater, including organic matter, microorganisms, viruses,
turbidity, chromaticity, heavy metals, COD, and ammonia nitrogen. Even after fouling, its
performance can be restored through cleaning, ensuring prolonged membrane service life and
cost-effectiveness.
Characteristic: Operation at low pressure; High tolerance to fluctuations in raw water quality;
Anti-fouling
Applications: The membrane is suitable for lithium extraction from salt lakes, zero discharge
of wastewater, reuse of reclaimed water, protein and amino acid concentration in
food/beverage industries, desalination of polysaccharides, etc.
selective layer collaborative regulation technology, along with a high-flux design. Primarily
utilizing polyamide as the main membrane material, with quantitative regulation of molecular
weight cut-off (MWCO) ranging from 200 to 400 Da. This series operates efficiently at low
pressure, achieving a single module recovery rate of approximately 15%. It excels in removing
diverse impurities from wastewater, including organic matter, microorganisms, viruses,
turbidity, chromaticity, heavy metals, COD, and ammonia nitrogen. Even after fouling, its
performance can be restored through cleaning, ensuring prolonged membrane service life and
cost-effectiveness.
Characteristic: Operation at low pressure; High tolerance to fluctuations in raw water quality;
Anti-fouling
Applications: The membrane is suitable for lithium extraction from salt lakes, zero discharge
of wastewater, reuse of reclaimed water, protein and amino acid concentration in
food/beverage industries, desalination of polysaccharides, etc.
Model | MNF-1812 | MNF-2540 | MNF-4040 | MNF-8040 | ||||
Effective membrane area ft2 (m2) | 4.20（0.38） | 23.68（2.2） | 92.40（8.40） | 400.00（36.40） | ||||
Water production GPD (m3/day) | 87(0.33) | 502(1.90) | 1918(7.26) | 8311(31.46) | ||||
Stable removal rate | >98%（2000 ppm MgSO4） | |||||||
Feed Spacer Thickness mil（mm） | 31 (0.79) | |||||||
Testing Conditions: All data is collected under operating pressure of 0.69 MPa, 25℃ and pH7. | ||||||||
Membrane Parameters：Pore diameter: 0.5 nm，MWCO: 200-400 Da，PWP：5-6 LMH/bar | ||||||||
Usage Conditions: Max. operating pressure：600 psi，Max. operating temperature: 45℃, pH value range of feed water during continuous operation: 3-11, Allowable concentration of free chlorine: ＜100 ppm | ||||||||
Notes: 1.The permeate flow of 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. | ||||||||
*The above parameters serve as reference values, and element parameters should be appropriately adjusted based on specific operational conditions.
*Please note that the company's products undergo continual optimization, and actual performance data may vary from those presented in the product catalog. Nanjing Weihua Membrane Technology Co., Ltd. reserves the final interpretation rights.
*Please note that the company's products undergo continual optimization, and actual performance data may vary from those presented in the product catalog. Nanjing Weihua Membrane Technology Co., Ltd. reserves the final interpretation rights.
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 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 5-40℃, with the recommended optimal storage temperature being 15-30℃
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.
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 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 5-40℃, with the recommended optimal storage temperature being 15-30℃
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.
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