Transcript Document

Course
Module 4
Lesson 1
:
:
:
Grain Quality
Rice Milling
Introduction to the milling process and its outputs
Good
Equipment
Good Paddy
Rice
If
Then
you have good
quality paddy in a
well-maintained mill
that is operated by a
skilled miller,
the mill will produce
high quality head
rice.
you use poor quality
paddy,
the mill will always
produce poor quality
milled rice, despite
the skill or the miller
or maintenance of
the mill.
the miller is not
skilled,
the use of good
milling equipment
and good quality
paddy does not
guarantee a high
quality product
Skilled
Miller
Course
Module 4
Lesson 2
:
:
:
Grain Quality
Rice Milling
What are the different types of rice mills?
TEST MILL
The test mill is a small and
portable mill designed to test
samples of paddy rice for
milling quality. A test mill
might be used by a paddy
rice buyer who wants to see
how well a quantity of paddy
rice mills before buying it.
Test mills are also ideal for
lab environments where
small amounts of paddy rice
need to be prepared for
experimentation.
A rice test mill.
Course
Module 4
Lesson 2
:
:
:
Grain Quality
Rice Milling
What are the different types of rice mills?
VILLAGE MILL
Village-type rice mills can be found
in rural communities and are used
for service milling paddy of farmers
for home consumption. In many
cases, village mills are adaptations
of the Engleberg coffee huller from
the United States, modified for
milling rice.
These mills, however, are notorious
for breaking paddy grain. Because
of the high breakage, the total
milled rice recovery is 53-55%, and
head rice recovery is on the order of
30% of the milled rice.
A village mill.
Course
Module 4
Lesson 2
:
:
:
Grain Quality
Rice Milling
What are the different types of rice mills?
COMMERCIAL MILL
Commercial milling systems mill
the paddy in stages, and hence
are called multi-stage or multipass rice mills. The objective of
commercial rice milling is to
reduce mechanical stresses and
heat buildup in the grain, thereby
minimizing grain breakage and
producing uniformly polished
grain. Compared to village-level
systems, the commercial milling
system is a more sophisticated
system configured to maximize
the process of producing wellmilled, whole grains.
A commercial milling system.
Course
Module 4
Lesson 4
:
:
:
Grain Quality
Rice Milling
Let’s mill some rice
RICE MILL SIMULATION
In the rice simulation below, read and follow steps 1, 2, 3.