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Macrophomina phaseolina  was cultivated in complex and simple media for the production of extracellular lipolytic enzymes. Culture supernatants were batch foam fractionated for the recovery of these enzymes, and column design and operation included the use of P 2 frit (porosity 40 to 100   μ  m), air as sparging gas at variable flow rates, and Triton X-100 added at the beginning or gradually in aliquots. Samples taken at intervals showed the progress of the kinetic and the efficiency parameters. Best results were obtained with the simple medium supernatant by combining the stepwise addition of small amounts of the surfactant with the variation of the air flow rates along the separation. Inert proteins were foamed out first, and the subsequent foamate was enriched in the enzymes, showing estimated activity recovery  (R) , enrichment ratio  (E) , and purification factor  (P)  of 45%, 34.7, and 2.9, respectively. Lipases were present in the enriched foamate.

Recovery of Extracellular Lipolytic Enzymes fromMacrophomina phaseolinaby Foam Fractionation with Air