~ 990 ~
International Journal of Chemical Studies 2018; 6(4): 990-993
P-ISSN: 2349–8528
E-ISSN: 2321–4902
IJCS 2018; 6(4): 990-993
© 2018 IJCS
Received: 09-05-2018
Accepted: 17-06-2018
Varsha Kanojia
Division of Food Science and
Technology, Sher-e-Kashmir
University of Agricultural
Sciences and Technology,
Shalimar, J&K, India
NL Kushwaha
Central State Farm, Assistant
Manager (Agril. Engg.)
Sardargarh, Rajasthan, India
Monika Reshi
Division of Food Science and
Technology, Sher-e-Kashmir
University of Agricultural
Sciences and Technology,
Shalimar, J&K, India
A Rouf
Division of Food Science and
Technology, Sher-e-Kashmir
University of Agricultural
Sciences and Technology,
Shalimar, J&K, India
Haseeba Muzaffar
Division of Food Science and
Technology, Sher-e-Kashmir
University of Agricultural
Sciences and Technology,
Shalimar, J&K, India
Correspondence
Varsha Kanojia
Division of Food Science and
Technology, Sher-e-Kashmir
University of Agricultural
Sciences and Technology,
Shalimar, J&K, India
Products and byproducts of wheat milling process
Varsha Kanojia, NL Kushwaha, Monika Reshi, A Rouf and Haseeba
Muzaffar
Abstract
Wheat crop is India’s prime most staple harvest, placed second to rice. It is mostly consumed in the
north-west parts of the country. Since it is rich in protein, vitamin and carbohydrate, it provides a
balanced diet to the consumer. Wheat milling is the process of grinding whole wheat grain and is
converted into flour. Wheat flour is the most important ingredient in home baking and is the framework
for almost every commercially baked product and pasta. The grains available for the production of flour,
wheat is unique. It is the only cereal grain with sufficient gluten content to make a typical loaf of bread
without being mixed with other grains. This study of literature was focused on the wheat morphology and
it’s composition, wheat milling process, products and byproducts.
Keywords: Wheat, nutrition, milling process, flour
Introduction
Wheat is a farinaceous grass, known botanically as triticum spp., is one of the most consumed
cereal grains worldwide and makes up a substantial part of the human diet. It provides more
nourishment (calories & proteins) for humans than any other single food crops. According to
Statista 2013/2014, the global production volume of wheat amounted approximately 710
million metric tons, which has shown a 7.7% increment from the previous year. It is the
second most important food crop in the developing world after rice. In sub-Saharan Africa, 14
countries produce wheat; Ethiopia and South Africa are the two major producers. Along with
Teff, wheat and maize represent the three most important cereal crops in Ethiopia. Wheat is
one of the various cereal crops largely grown in highlands of Ethiopia. It is produced largely in
the southeast, central and northwest parts of Ethiopia (Karin & Leo, 2013)
[3]
.
Morphology and composition of wheat
Wheat grains are generally oval shaped, although different types of wheat have grains that
range from almost spherical to long, narrow and flattened shapes. The grain is usually between
5 and 9 mm in length, weighs between 35 and 50mg and has a crease down one side where it
was originally connected to the wheat flower. The wheat grain contains 2-3% germ, 13-17%
bran and 80-85% mealy endosperm (all constituents converted to a dry matter basis)
(Sramkova et al. 2009)
[9]
. The wheat kernel consists of three fractions, the endosperm, bran,
and germ, which are compositionally and morphologically very different. Thus, products will
have different coarseness, textures, and color depending on the portion of the wheat kernel
being used. Refined wheat flour is formed primarily from the endosperm of the wheat kernel.
The endosperm comprises approximately 82% of the wheat kernel. The function of the
endosperm is to provide energy for the embryonic plant during germination of the wheat
kernel. The endosperm contains approximately starch and 10-14% protein (Korolchuk et al.,
2005)
[4]
. Compared to the bran and germ, the endosperm contains low amounts of fiber, lipid,
vitamins, minerals, protein, pigments and other phytonutrients. This helps give the refined
wheat flour its consistent, fine, starchy texture and off- white color compared to whole-grain
wheat flour. The bran consists of several cell layers and contains a significant amount of fiber.
The bran includes the aleurone layer, which separates the endosperm from the bran layers. The
aleurone layer is rich in proteins, vitamins and phytonutrients. The germ is rich in lipids, fiber,
vitamins, minerals and phytonutrients. Thus, refined wheat flour, which is made primarily of
endosperm is mainly starch and has limited amounts of fiber, proteins, lipids, vitamins,
minerals and other phytonutrients (Korolchuk et al., 2005)
[4]
.