Corn and corn types .pdf

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1. Shri Ram Swaroop Memorial University
Topic – Corn Milling process
Subject – Technology of cereals
pulses and oil seed
PRESENTED BY :
Deepu Chaudhary
202110902130004
B.Sc (H) Food Technology
4
th
Semester
PRESENTED TO :
Dr. Sonal prasad

2. CORN
Many varieties of corn are grown acrass
the globe in warm climates
India is the fourth largest producer plant
grows to a height of about three metres
or more.
Kernel is large with a high empryo
content corn oil extracted from the
germ is commercially valuable.

3. Corn milling process
•The different steps of corn
milling process

4. 1.Cleaning: The corn kernels are thoroughly cleaned to
remove any impurities such as dirt, stones, or other
foreign materials. This is typically done using various
cleaning equipment, such as sieves, aspirators, and
magnetic separators.
2.Steeping: The cleaned corn kernels are then
soaked in water in a process called steeping.
Steeping helps soften the kernels, making it easier
to separate the various components.

6. 3.Germ separation: After steeping, the
kernels are passed through a germ
separator to separate the germ from
the rest of the kernel. The germ
contains oil, protein, and other
nutrients, and it is typically used for oil
extraction or further processing.

7. 4.Milling: The remaining part of the
corn kernel, called the endosperm, is
ground into fine particles through a
milling process. This can be done using
different types of mills, such as hammer
mills, roller mills, or stone mills. The
milling process aims to break the
endosperm into smaller particles while
minimizing the production of fines.

9. 5.Sieving: The milled corn particles are sieved to
separate different particle sizes. This helps in
achieving the desired texture and consistency of the
final product.
6.Germ extraction: If corn germ oil is desired, the
separated germ is mechanically pressed or
solvent-extracted to extract the oil. This step involves
using hydraulic presses or extraction solvents to
separate the oil from the germ.

10. 7.Fiber and bran separation: The remaining bran and
fiber from the milling process can be separated from
the endosperm using a combination of sieving and air
classification techniques. These byproducts can be
used for animal feed or further processed into other
products.
8.Starch extraction: The separated endosperm, which
is primarily composed of starch, is then subjected to a
process called wet milling. Wet milling involves steeping
the endosperm in water and separating it into various
components.

11. 9.Drying: The extracted starch is then dried to remove
excess moisture, typically using hot air or drum dryers.
This produces dry corn starch, which is a common
ingredient in many food and industrial applications.
10.Additional processing: Depending on the desired
final products, further processing steps may be
undertaken. For example, cornstarch can be modified
through processes like hydrolysis or oxidation to create
specialty starches with different properties.

12. 11.Packaging: The final corn
milling products are packaged
into bags or containers for
distribution and sale.