Separation of bovine serum albumin by foam fractionation with wire gauze structured packing column.

In order to enhance foam drainage, a novel foam fractionation column with the wire gauze structured packing was developed. The performances of the packing were evaluated by investigating its effects on bubble size, liquid holdup, enrichment ratio, and recovery percentage efficiency under different conditions using bovine serum albumin (BSA) aqueous solution as a model. The results showed that the packing could accelerate the bubble collapse, reduce the liquid holdup, enhance the foam drainage, and improve the BSA enrichment ratio.

Recovery of isoflavone aglycones from soy whey wastewater using foam fractionation and acidic hydrolysis.

The purpose of this work was to recover isoflavone aglycones from industrial soy whey wastewater, where the isoflavone aglycones mainly existed in the form of β-glycosides. First, foam fractionation was used for effectively concentrating the total soy isoflavones, including isoflavone aglycones and β-glycosides, from the wastewater. Fourier transform infrared spectroscopy indicated the existence of complexes of soy isoflavones and soy proteins.

Enhancing foam drainage using foam fractionation column with spiral internal for separation of sodium dodecyl sulfate.

A new type of foam fractionation column with spiral internal had been designed for enhancing the foam drainage and thus for the removal of minute hazardous materials. The column without spiral internal was served as the comparison column, and an anionic surfactant sodium dodecyl sulfate (SDS) was used as the foaming solution. Effects of liquid loading volume, initial SDS concentration and superficial gas velocity on enrichment ratio and recovery percentage of SDS were investigated.

Removal of color from textile dyeing wastewater by foam separation.

The feasibility of foam separation for color removal from direct dyes-containing wastewater was assessed using actual textile wastewater as the research system and cetyl trimethyl ammonium bromide (CTAB) as the collector. The influences of liquid loading volume, air flow rate, surfactant concentration, and initial pH on the removal efficiency and reuse of CTAB in the foamate were studied. The results indicated that using CTAB as a collector for foam separation can provide good foaming quality and effectively remove color from textile wastewater.