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Water -treatment  Ultra - Filtration system

1. Introduction of UF System 

Ultrafiltration (UF) is a membrane process between microfiltration and nanofiltration. The membrane pore diameter is between 0.05um and 1000um molecular weight. Ultrafiltration is a membrane separation technology that can purify, separate and concentrate the solution. The ultrafiltration process can be generally understood as the screening process related to the size of the membrane pore. The pressure difference between the two sides of the membrane is the driving force, and the ultrafiltration membrane is the filtration medium
Under pressure, when water flows through the membrane surface, only water and small molecular materials smaller than the membrane pore diameter are allowed to pass through, so as to achieve the purpose of purification, separation and concentration of the solution.
For ultrafiltration, the retention property of the membrane is characterized by the molecular weight of the standard organic matter. The molecular weight of the membrane is usually between 1000 and 300000D, so the ultrafiltration membrane can be applied to large molecules
Organics (such as protein, bacteria), colloids, suspended solids, etc., are widely used in the purification of liquid materials, purification of macromolecular organics, and heat source removal.


2.The main features

.The separation and purification of macromolecular and small molecular materials can be realized under normal temperature, replacing the traditional technology.


· low operating pressure, low investment cost and low energy consumption;


· wide product distribution, a variety of membrane pore diameter optional, wide range of use, a wide range of applications;

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3.The working principle


Ultrafiltration is the separation process of water and small solute particles through a pressure-activated membrane that traps relatively high amounts of colloids, particles and substances in water under the action of external forces (pressure). Material with molecular weight of 3x10,000-1x10,000 can be trapped by micropore screening on the membrane surface. When the treated water passes through the membrane surface at a certain velocity by means of external pressure, water molecules and solutes with molecular weight less than 300-500 penetrate the membrane, while particles and macromolecules larger than the membrane pore are trapped by screening, so that water can be purified. In other words, when water passes through the ultrafiltration membrane, most of the colloidal silicon contained in the water can be removed, and a large amount of organic matter can be removed.


4. Application area 


· Decolorize and debulk proteins of antibiotics, vitamins, amino acids and various organic acids;
· Separation, concentration and purification of proteins and enzymes;
· Separation and decoloring of tea powder, stevia sugar and tea polyphenols;
· Concentration of gardenia yellow pigment and extraction of puerarin;
· Separation and purification of polysaccharides and polysaccharides, clarification and decolorization of beverages, etc.