Transport phenomena in foam fractionation

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Foam fractionation has a number of immediate applications in mineral and food processing but its most exciting potential is as low cost alternative for recovering and purifying high value biosurfactants. These are materials used to stabilise interfaces in living systems, and can be used as antibiotics and antiviral agents. The affinity for biosurfactants to collect at an interface suggests that foam fractionation is an ideal process to concentrate valuable products. Clearly, a cost-effective and reliable method of enriching streams of biosurfactants will make their use even more attractive and will engender the development of more novel biomaterials, such as pepfactants.