THIS IS FOR EDUCATION

1. BRSM college of Agricultural engineering & Technology Mungeli IGKV Raipur
Course Name - Seminar
Course No. - AE-498
Seminar On The Different Process in Rice Mill Presented by
OM PRAKASH SURYAWANSHI
B.TECH (AGRIL.ENGG.)
4TH YEAR

2. INTRODUCTION
Today rice is one of the most important & major food grain of the world.
Nearly 1/2 to 2/3 of total world population has totally adopted rice as their main food.
Rice milling technique improve the nutritional, cooking & Eating quality of rice.

3. Basic flow chart of rice milling process

4. CLEANING
Removing of foreign matter from paddy,sach as stone, pebbles, dirt, dust & husk.
Equipment-vibrating paddy cleaner.
Specification-
* No. of screen-8.for
(2-paddy,2-stones,2-hask,2- dust).
* Screen openings-
(0.20mm,0.8mm,0.6mm)
* Aspirator-husk.
* Moter-2hp.

5. Parboiling of paddy
Paddy is soaked & wet paddy is heated then dried.
To achieve maximum recovery of head rice & to minimize breakage during milling.
Equipment-vertical 12 tanks.
It is carried out three steps-
soaking-hot water at 800C for 6 hr.
Steaming-7.5 kg/ cm2 for 20 min.

6. DRYING
LSU(Lousiana State University ) drying is mechanical hot air dryer.
During the first pass paddy should be dried to mc. of 16-17% & them tempered for 3-4hr.
Steam-7.5 kg/cm2.for 3-4hr.
Dried paddy at 13% mc.

7. DESTONNER
Separating paddy from stones & pebbles before milling or dehusking.
Equipment-destoner
Specification-
* vartical vibratry screen.
* aspirator-suck the husk.
* driven motor-2hp.

8. SHELLING
Separating husk from the paddy grain.
Paddy grain is passed between two resilient surface moving at different speed in the opposite direction.
Equipment-rubber-roll Sheller.
Specification-
*dia.of roller -220 to 260mm.
* speed ratio-1:0.75 to 1:0.80.
* thickness of roller -15 to 30.
* hardness of coating- 90 to 95 shore.

9. PADDY SEPARATOR
Separating paddy from brown rice.
Equipment-tray separator
Specification-
* No. of tray-10 to 15.
* Position of tray-mounted one
above the other 5cm a part.
* Front positions is inclined.
* speed-300rpm.
* driven motor-2hp.

10. WHITENER
Removal of bran layers from brown rice.
Equipment- vertical whitening cone.
Specification-
* cast iron cylinder with abrasive stone coating.
* A wire screen is fixed around the cone.
* Distance between coating & screen- 4.5 to 6mm.
* Bran aspirator- remove the bran layer.
* driven motor-5 hp.

11. GRADER
The grader is use for obtain higher quality rice, which contains less broken.
It is cylindrical in shape & intendent on the inner side.
Driven motor-2hp.

12. WEIGHING,PACKAGING,TRANPORTING
The rice obtained from grater is filled in the jute bags & weigh on the weighing machine.
* Bags-25kg,50kg.
After that transportation by trucks, tractors to the buyer.