ABSTRACT
Foam fractionation is a technique which is used to separate the dissolved species of surface active molecules in aqueous phase. Floatation technique is the basis for foam fractionation where the former deals with macro species that needs to be separated and the latter with surface active molecules. There are several modes of operation employed for foam fractionation which are similar to that of floatation. The broadly classified modes are Batch mode, Semi-batch mode, and Continuous mode. The bubble size has a major influence on the enrichment in the foamate. Generally, the smaller the bubble size is, the slower is its rising velocity in the liquid. There have been several attempts made to improve the enrichment over the course of improving the foam fractionation technique. One such technique is connecting foam fractionation columns in series; therefore, the foamates collected are sequentially fractionated until the desired concentration is achieved.
