However the focus should be to determine what is causing the itch. If it is dry skin, then a good beard oil or beard balm will help to moisturise the skin and hair. When applying the oil or balm, it is a good idea to draw it upward from the bottom of the beard, against the grain. Brush it up against the grain several times before patting it back down.
Filtration is commonly the mechanical or physical operation which is used for the separation of solids from fluids (liquids or gases) by interposing a medium through which only the fluid can pass.The fluid that passes through is called the filtrate. Filtration is used to separate particles and fluid in a suspension, where the fluid can be a liquid, a gas or a supercritical fluid. 2  Depending on the application, either one or both of the components may be isolated.
The shape of the screens depends on the particles that have to be removed. Sand filtration. Sand filtration is a frequently used, very robust method to remove suspended solids from water. The filter medium consists of a multiple layer of sand with a variety in size and specific gravity.When water flows through the filter, the suspended solids precipitate in the sand layers as residue and the water, which is reduced in suspended solids, flows out of the filter.pecific water purification steps are taken, in order to make the water meet current water standards. Purification methods can be divided up into settling of suspended matter, physical/ chemical treatment of colloids and biological treatment.