Chemical composition of solid waste and effect of enzymatic oil extraction on the microstructure of soybean (Glycine max)

The solid wastes were obtained from enzymatic extraction of soybean oil using four enzyme systems (Alcalase/Celluclast or Alcalase/Viscozyme L) each with two pH conditions: controlled or not controlled. This last option gave a better oil extraction, regardless of the enzymes used. The ash levels were higher for the enzyme systems subjected to controlled pH, depending on the buffer solutions used. The others constituents presented similar values between each other. The monosaccharides with highest concentrations were galactose, followed by glucose and arabinose. The physical analysis showed that the waste residues had good oil binding capacity. The SEM and epifluorescence microscopy revealed the microstructure of the beans and raw materials, as well as the changes caused by the extraction procedures.

► Study of by-products from soybean oil production by enzymatic processing. ► Soybean fibers with high water and oil holding capacity. ► The nutritional composition of the by-products of the soybean oil enzymatic extraction. ► Enzymatic soybean oil extraction as new options for special diets foods.