the products out of rice

2. By-products of Rice Milling
• Paddy when milled usually yields, apart from
marketable rice (head rice +
• medium and big brokens), 21-24% husk, 3-7%
bran and 0.2-2% small brokens and germ,
• which are the three important by-products of rice
milling.
• The economic utilization of the by-products,
which constitute nearly 30% by
• weight of paddy processed, is essential for proper
viability of the industry

3. Husk
1/4th of paddy consists of husk, which makes up the largest milling by-
product of rice.
• It has a high ash content, about 20%, the major portion of which (over
90%) consists of silica.
• Not edible
• profitable use is as fuel,
• Husk has a calorific value of about 3000 kcal/kg (nearly one-third of that of
mineral oil and half that of coal)- briquetting
• Fully burnt white ash of husk contains 95% silica and can be used for
manufacturing sodium silicate, silica gel, insulating bricks, etc.
• If husk is incompletely burnt, the ash can be used as diluent for manure.
• The ash is also used to increase the bulk of industrial cleaning
compositions.
• Other applications of husk are as loose insulating material in buildings and
cold storages, in shipping as packing material, etc.

4. Bran
• Rice barn is the most valuable by-product of rice milling industry.
• It contains 12- 15% protein, 14-20% oil if the paddy is raw and 18-
25% if parboiled, and is a rich source of B-group vitamins.
• Bran can be utilized in various ways. It is being used as feed for
animals.
• However, it is a valuable source of vegetable oil and should best be
first solvent-extracted to recover the oil.
• The extracted bran is used as animal feed.
• The crude oil extracted is used for the manufacture of soap and
fatty acids. Edible grade oil is produced by refining the crude bran
oil having low free fatty acids (not more than 8%).

5. Broken rice
• Although 5-50% of the rice grains may break during milling,
the medium and large brokens as per usual Indian
marketing tradition can be mixed with head rice, unless of
course the breakage is excessive.
• Therefore, it is only the very small brokens that are
separated during grading of milled rice.
• Under normal milling practice, where the stones are not
completely removed, the small stones and mud particles
collect mainly along with the small brokens.
• Poultry feed
• But when paddy is rigorously cleaned before milling,
brokens can be used in the form of semolina or flour with
blackgram in preparation of breakfast foods such as Idli and
Dosa.

6. • Rice pollards
• Rice pollard which is a mixture of bran 8.5 %
of milled product and rice polishing 0.2 %, is a
high energy, high protein food.
• Enriched rice- simple coating
• Fortified rice- extrusion- processed product