4. Conclusions
There is an increasing interest in maximising the utility of
waste streams from processed fruit and vegetable in order to boost
economic efficiency and reduce waste. In this study, the yellow
soybean hulls, one of many possible waste streams, was processed
by mimicking different environments of the human digestive
system, such as the acidic environment of the stomach and basic
environment of the human small intestine, to purify dietary fibre
by digesting/removing starch, protein, fat, and pigments. This
study may allow an improved utilisation of this resource, which
is currently underexploited.
Because the way of processing this agricultural byproduct
determines the physicochemical properties and functionality of
fibres, differences among the TDF, IDF, and SDF, as well as the
potential applications, are considered in this study. The results
indicated that colour of lightness was significantly improved. There compared to the control. Significant differences were observed in
physicochemical and functional properties between treatment
and control, with the treatment exhibiting significantly lower
WAI and WSI. The mean particle size in SBH-C and SBH-T were
225.6 ± 1.1, 182.7 ± 0.7 lm, respectively. Additionally, the whole
wheat flour with 10% SBH-T showed more liquid-like behaviour,
which affected the dough viscoelastic property slightly, suggesting
possible use in the development of fibre enriched foods. To the best
of our knowledge, this is the first study to develop dietary fibre
from yellow soybean hulls. It is also the first rheological evaluation
of the application of soybean hull fibres in dough. Fibers from
yellow soybean hulls could have great potential in various food
applications due to their functional properties. Further investigations
are needed to establish the precise functions of fibre components
on human health and nutrition.