Membrane Technology and Filter Membranes
Working without the additional chemicals, and with the character of energy-saving and easy to arrange, membrane technology becomes a popular separation technology in the lab.
Membrane technology is a big concept of different separating processes, but all the processes have a common ground that they are all based on the presence of semi-permeable membranes.
You will find that the principle of membrane technology very easy to learn: the filter membrane that has selective separation wall, is acting as a special filter which is not only letting the liquid flow through but catching the suspended solids and other substances.
There are lots of methods to make substances penetrate a membrane in applications. High pressure, the introduction of electric potential and the maintenance of a concentration gradient on both sides of the filter membrane are often used to work it out.
You can find Hawach filter membranes in two types: round disc membrane filters and roll type membrane filter. Both of them can be used for filtrating and sterilizing liquids, gas, and other samples. With different pore size and materials such as PTFE, PVDF, Nylon, MCE filter membrane, CA, PES, GF, PP filter membrane and etc., Hawach filter membranes can remove all micro-organisms and particles, without any chemicals disturbing during the process.
Ultrafiltration Membrane Filtration Technology (UF)
Ultrafiltration membrane (UF) is a kind of membrane process between microfiltration and nanofiltration. It uses the principle of screening to separate, and the molecular weight of organic matter can be selected from 3000 to 300000 Dalton. UF is suitable for the separation, concentration, and purification of macromolecular substances and small molecular substances.
Reverse Osmosis Technology (RO)
Permeation is a process in which water flows spontaneously from one side of dilute solution through a semi-permeable membrane to the other side of concentrated solution.
Concentrated solutions are diluted with the continuous flow of water. When the pressure generated by the flow of water to the concentrated solution is sufficient to prevent the water from flowing into the net, the infiltration is in equilibrium, that is, to achieve dynamic equilibrium.
When the external pressure is applied on the concentrated solution and the pressure is greater than the osmotic pressure, the water in the concentrated solution will overcome the osmotic pressure and flow to the dilute solution through the semi-permeable membrane, making the concentration of the concentrated solution larger. This process is the reverse process of osmosis, called reverse osmosis.