length of non polar parts of surfactants will determine how easily the molecules can adsorb to the foam, and will therefore determine how effective the separation of the surfactant from the solution will be. Longer chains surfactants tend to associate into micelles at the solid-liquid surface. The concentration of the surfactant also plays a factor in the percent removal of the surfactant. Other Some other factors that affect the effectiveness of foaming include the flow rate of the gas, the bubble size and distribution, the temperature of the solution, and the agitation of the solution. Detergents are known to affect foaming. They increase the ability of the solution to foam, increasing the amount of protein recovered in the foamate. Some detergents act as stabilizers for the foam, such as cetyltrimethylammonium bromide (CTAB). External links Biosurfactant Foam Separation Metal Foam Creation Video Collapsing Metal Foam Video References Chemical processes