Modern Rice Milling - PowerPoint PPT Presentation

1 / 16
About This Presentation
Title:

Modern Rice Milling

Description:

Rubber roller huskers are widely used. Rice Huller. Rollers. Rice Hull Storage. Paddy Separation. Removal of paddy and husk from brown rice ... – PowerPoint PPT presentation

Number of Views:252
Avg rating:3.0/5.0
Slides: 17
Provided by: AAt66
Category:
Tags: milling | modern | rice | rollers

less

Transcript and Presenter's Notes

Title: Modern Rice Milling


1
Modern Rice Milling
  • Agricultural Engineering Unit
  • International Rice Research Institute

2
The Aim of Rice Milling
  • To attain the highest yield of white rice
  • With the best quality
  • Remove least amount of hull and bran
  • Minimum brokens
  • Little foreign matter

3
The Process
4
Paddy Intake
  • Quality input quality output
  • Garbage in garbage out!

5
Paddy Cleaning
  • After harvest, foreign matter can be as high as
    5-10

6
Hulling the Paddy
  • Husks account for 20 of paddy weight
  • Rubber roller huskers are widely used

Rice Huller
Rollers
7
Rice Hull Storage
8
Paddy Separation
  • Removal of paddy and husk from brown rice
  • Sieve or gravity separator

Paddy separator
Separator tray
9
De-stoning
  • Paddy will contain small stones and debris
  • Debris must be removed before polishing

De-stoner
10
Polishing
  • Removes bran layer to produce white rice.
  • Amount of bran removed (usually 8-12) is called
    Milling Degree.

11
Sifting or Separation of White Rice
  • After polishing, white rice contains
  • Head rice
  • Large brokens
  • Small brokens
  • The white rice is separated using a Sifter

12
Grading or Length Separation
  • After polishing, white rice contains
  • Head rice (75 of whole kernel is present)
  • Large brokens
  • Small brokens

13
Rice Mixing
  • An efficient rice mill will produce
  • 50 head rice (whole kernels)
  • 5-15 large broken and
  • 5-15 small broken kernels
  • Depending on the countrys standards, rice grades
    in the market will contain from 5-25 broken
    kernels.

14
Rice Mixing
Large brokens
Small brokens
Whole kernels
15
Mist Polishing
  • Adds luster, or polished appearance.

16
Rice Weighing
  • Rice is normally sold in 50 kg sacks which must
    be accurately weighed and labeled.
Write a Comment
User Comments (0)
About PowerShow.com