World Grain - May 2013 - 106

RICE QUARTERLY

Graininlosses
rice processing
T

he performance of a rice mill is linked to several large
variables including quality of paddy, maintenance of the
machines and operator skill.
Good quality milled rice starts at the farm with good quality seeds and crop care for uniform growth and grain size,
according to an e-mail conference from the United Nations’
Food and Agriculture Organization’s (FAO) Agriculture and
Consumer Protection Department.
During post-production operations, several other factors
can damage quality such as mixing of varieties, heat discoloration, contamination, insect damage in storage, fissuring
during drying and breakage in milling. Lack of appropriate
technology as well as technical and management skill causes
poor quality milled rice and economic losses, the FAO said.
“Many mill owners do not supervise and train their operators,” the FAO said. “They do not recognize that higher yields
could be obtained if the rice mill was properly operated.”
DRYING LOSSES
Sun drying is the traditional method of drying a harvested rice crop, and is acceptable as long as it is done properly,
the FAO said. The paddy should be spread out in sufficiently
thick layers and raked to mix it continuously. This prevents
the grain from being exposed to the strongest rays of the sun,
which can cause fissuring.
It is the cheapest method of drying, but also the most unreliable. The sun may not be available when it is most needed.
For example, if it rains for a week during harvest, the grain is
likely to germinate, yellow or rot.
“When there is sunshine in the morning, and the grain is
spread out, a sudden rainstorm can cause fissured grain,” the
106

by Susan Reidy

Lack of technology, technical and
management skills can lead to poor
quality milled rice
FAO said. “If the sun is hot, the workers prolong mixing the
grain, and the result again will be fissured grain.”
Sun drying is a major cause of lower head rice yield, the
FAO said. Since it is usually a single pass operation, without
a tempering phase to relieve internal stress, small fissures can
form in the paddy. The defects are not visible with the naked
eye but can be seen when a light is shined through the grain.
The need for dryers is recognized, but the investment has
been slow. Mechanical dryers require adaptation of technology into an existing post-harvest system, FAO said. The drying process is complicated and requires a deep knowledge of
the process.
Use of dryers can also lead to quality problems, especially
if they are used improperly. Fissured grain is the most common problem, which results in significantly lower milling
yields. Thermal stresses, high rates of moisture desorption
or moisture reabsorption by dried grains can cause the rice
kernel to fissure.
State-of-the-art commercial mills properly adjusted and
working with good quality paddy can yield 67% milled rice,
with head rice above 70%. Poor quality paddy that is badly
May 2013 / World Grain / www.World-Grain.com


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World Grain - May 2013

Table of Contents for the Digital Edition of World Grain - May 2013

World Grain - May 2013
Table of Contents
From the Editor-in-chief - Ardent Mills speaks to milling’s future
Calendar of Events
Australian Grains Industry Conference
News review - ADM, GrainCorp agree to tentative A$3.4 billion takeover bid
Bunge earnings up on sales growth
Bunge appoints new North America CEO
KSU adds feed technology associate professor
Drought impact drops Cargill’s earnings 42%
Egypt mulls wheat imports from Kazakhstan
Carr’s Milling profit increases 36.2%
Deyu appoints new CEO, president
POET resumes production at Missouri ethanol plant
China conditionally approves Marubeni/Gavilon deal
Ukraine exported 19.5 million tonnes
Port approves Richardson terminal expansion
Seaboard director, former executive vice-president dies
Ardent Mills management team taking shape
Cargill CEO urges market transparency
Grain Market Review - Oilseeds
Country Focus - Focus on Cuba
Feature - Grain Industry safety under media attack
Feature - Larger supplies, lower prices
Feature - Grain storage and handling projects
Feature - Canada's grain marketing freedom
Grain Operations - Innovative conveying solutions
Feature - Giant energy trader enters global grain market
Feature - Success through diversification
Feature - Grain storage trends in India
Milling Operations - Flour mill contamination
Feature - Flour alternatives: beans, peas
Rice Quarterly - Grain losses in rice processing
Rice News Roundup - Japan to import first rice from Myanmar in 45 years
USA Rice welcomes support for Japan’s entry into TPP
Turkish authorities arrest importers of U.S. rice
U.S. rice acreage expected lower this year
Olam sells rice milling facility to Ebro Foods
USDA: Philippine rice imports to fall
Pakistan to explore foreign rice markets
Feature - Global Grain event comes to Chicago
World Grain Weather Report - Chilling impact on grain production
Technical Profile - Aflatoxin a growing concern
Supplier News
Product Showcase
World Grain Archive
Reader Information Form International Faxback Program
World Grain - May 2013 - World Grain - May 2013
World Grain - May 2013 - 2
World Grain - May 2013 - 3
World Grain - May 2013 - 4
World Grain - May 2013 - Table of Contents
World Grain - May 2013 - 6
World Grain - May 2013 - 7
World Grain - May 2013 - From the Editor-in-chief - Ardent Mills speaks to milling’s future
World Grain - May 2013 - 9
World Grain - May 2013 - 10
World Grain - May 2013 - 11
World Grain - May 2013 - Australian Grains Industry Conference
World Grain - May 2013 - 13
World Grain - May 2013 - News review - ADM, GrainCorp agree to tentative A$3.4 billion takeover bid
World Grain - May 2013 - 15
World Grain - May 2013 - KSU adds feed technology associate professor
World Grain - May 2013 - Egypt mulls wheat imports from Kazakhstan
World Grain - May 2013 - Carr’s Milling profit increases 36.2%
World Grain - May 2013 - China conditionally approves Marubeni/Gavilon deal
World Grain - May 2013 - Port approves Richardson terminal expansion
World Grain - May 2013 - Ardent Mills management team taking shape
World Grain - May 2013 - Cargill CEO urges market transparency
World Grain - May 2013 - 23
World Grain - May 2013 - 24
World Grain - May 2013 - 25
World Grain - May 2013 - Grain Market Review - Oilseeds
World Grain - May 2013 - 27
World Grain - May 2013 - Country Focus - Focus on Cuba
World Grain - May 2013 - 29
World Grain - May 2013 - 30
World Grain - May 2013 - 31
World Grain - May 2013 - Feature - Grain Industry safety under media attack
World Grain - May 2013 - 33
World Grain - May 2013 - 34
World Grain - May 2013 - 35
World Grain - May 2013 - Feature - Larger supplies, lower prices
World Grain - May 2013 - 37
World Grain - May 2013 - 38
World Grain - May 2013 - 39
World Grain - May 2013 - 40
World Grain - May 2013 - 41
World Grain - May 2013 - 42
World Grain - May 2013 - 43
World Grain - May 2013 - Feature - Grain storage and handling projects
World Grain - May 2013 - 45
World Grain - May 2013 - 46
World Grain - May 2013 - 47
World Grain - May 2013 - 48
World Grain - May 2013 - 49
World Grain - May 2013 - 50
World Grain - May 2013 - 51
World Grain - May 2013 - 52
World Grain - May 2013 - 53
World Grain - May 2013 - 54
World Grain - May 2013 - 55
World Grain - May 2013 - 56
World Grain - May 2013 - 57
World Grain - May 2013 - Feature - Canada's grain marketing freedom
World Grain - May 2013 - 59
World Grain - May 2013 - 60
World Grain - May 2013 - 61
World Grain - May 2013 - 62
World Grain - May 2013 - 63
World Grain - May 2013 - 64
World Grain - May 2013 - 65
World Grain - May 2013 - 66
World Grain - May 2013 - 67
World Grain - May 2013 - Grain Operations - Innovative conveying solutions
World Grain - May 2013 - 69
World Grain - May 2013 - 70
World Grain - May 2013 - 71
World Grain - May 2013 - 72
World Grain - May 2013 - 73
World Grain - May 2013 - 74
World Grain - May 2013 - 75
World Grain - May 2013 - 76
World Grain - May 2013 - 77
World Grain - May 2013 - Feature - Giant energy trader enters global grain market
World Grain - May 2013 - 79
World Grain - May 2013 - 80
World Grain - May 2013 - 81
World Grain - May 2013 - Feature - Success through diversification
World Grain - May 2013 - 83
World Grain - May 2013 - 84
World Grain - May 2013 - 85
World Grain - May 2013 - 86
World Grain - May 2013 - 87
World Grain - May 2013 - Feature - Grain storage trends in India
World Grain - May 2013 - 89
World Grain - May 2013 - 90
World Grain - May 2013 - 91
World Grain - May 2013 - 92
World Grain - May 2013 - 93
World Grain - May 2013 - Milling Operations - Flour mill contamination
World Grain - May 2013 - 95
World Grain - May 2013 - 96
World Grain - May 2013 - 97
World Grain - May 2013 - 98
World Grain - May 2013 - 99
World Grain - May 2013 - Feature - Flour alternatives: beans, peas
World Grain - May 2013 - 101
World Grain - May 2013 - 102
World Grain - May 2013 - 103
World Grain - May 2013 - 104
World Grain - May 2013 - 105
World Grain - May 2013 - Rice Quarterly - Grain losses in rice processing
World Grain - May 2013 - 107
World Grain - May 2013 - 108
World Grain - May 2013 - 109
World Grain - May 2013 - USA Rice welcomes support for Japan’s entry into TPP
World Grain - May 2013 - 111
World Grain - May 2013 - U.S. rice acreage expected lower this year
World Grain - May 2013 - Pakistan to explore foreign rice markets
World Grain - May 2013 - Feature - Global Grain event comes to Chicago
World Grain - May 2013 - 115
World Grain - May 2013 - World Grain Weather Report - Chilling impact on grain production
World Grain - May 2013 - 117
World Grain - May 2013 - 118
World Grain - May 2013 - 119
World Grain - May 2013 - Technical Profile - Aflatoxin a growing concern
World Grain - May 2013 - 121
World Grain - May 2013 - 122
World Grain - May 2013 - 123
World Grain - May 2013 - Supplier News
World Grain - May 2013 - 125
World Grain - May 2013 - 126
World Grain - May 2013 - 127
World Grain - May 2013 - Product Showcase
World Grain - May 2013 - World Grain Archive
World Grain - May 2013 - Reader Information Form International Faxback Program
World Grain - May 2013 - 131
World Grain - May 2013 - 132
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http://digital.world-grain.com/sosland/wg/2006_09_01
http://digital.world-grain.com/sosland/wg/2006_08_01
http://digital.world-grain.com/sosland/wg/2006_07_01
http://digital.world-grain.com/sosland/wg/2006_06_01
http://digital.world-grain.com/sosland/wg/2006_05_01
http://digital.world-grain.com/sosland/wg/2006_04_01
http://digital.world-grain.com/sosland/wg/2006_03_01
http://digital.world-grain.com/sosland/wg/2006_02_01
http://digital.world-grain.com/sosland/wg/2006_01_01
http://digital.world-grain.com/sosland/wg/2005_12_01
http://digital.world-grain.com/sosland/wg/2005_11_01
http://digital.world-grain.com/sosland/wg/2005_10_01
http://digital.world-grain.com/sosland/wg/2005_09_01
http://digital.world-grain.com/sosland/wg/2005_08_01
http://digital.world-grain.com/sosland/wg/2005_07_01
http://digital.world-grain.com/sosland/wg/2005_06_01
http://digital.world-grain.com/sosland/wg/2005_05_01
http://digital.world-grain.com/sosland/wg/2005_04_01
http://digital.world-grain.com/sosland/wg/2005_03_01
http://digital.world-grain.com/sosland/wg/2005_02_01
http://digital.world-grain.com/sosland/wg/2005_01_01
http://digital.world-grain.com/sosland/wg/2004_12_01
http://digital.world-grain.com/sosland/wg/2004_11_01
http://digital.world-grain.com/sosland/wg/2004_10_02
http://digital.world-grain.com/sosland/wg/2004_10_02
http://digital.world-grain.com/sosland/wg/2004_10_01
http://digital.world-grain.com/sosland/wg/2004_09_01
http://digital.world-grain.com/sosland/wg/2004_08_01
https://www.nxtbookmedia.com