Roller milling process for fractionation of fenugreek seeds (Trigonella foenumgraecum) and characterization of milled fractions.

The fenugreek seed is the richest source of soluble
and insoluble fiber and also known for its medicinal and
functional properties. The major objective of this present
study is fractionation of the fenugreek by roller milling method
and characterization of roller milled fractions. The effects
of moisture conditioning on fenugreek roller milling were
studied using standard methods. The results observed were
increase in coarse husk from 33.75–42.46 % and decrease in
flour yield from 49.52–41.62 % with increase in addition of
moisture from 12–20 %. At 16 % conditioning moisture, the
yield of coarse husk was 40.87 % with dietary fiber and
protein content of 73.4 % and 6.96 % respectively. The
yellowness value (b) for the coarse husk (29.68) found to be
lowest at 16 % conditioning moisture compared to the other
coarse husk samples, showing maximum clean separation.
The fiber fractions showed the viscosity of 6,392 cps at
2 % w/v concentration. The flour fraction was higher in
protein (41.83 %) and fat (13.22 %) content. Roller milling
process of fenugreek was able to produce > 40 % of coarse
husk with 73.4 % dietary fiber (25.56 % soluble & 47.84 %
insoluble) and > 48 % flour with 41.83 % protein content,
where as the whole fenugreek contained 22.5 % protein &
51.25 % dietary fiber. Thus roller milling has proved to be a
valuable method for the fractionation of fenugreek to obtain
fiber and protein rich fractions.