relevance of grain aeration valuable grain management tool
DESCRIPTION
Serving the Agricultural Industry Since 1954. Relevance of Grain Aeration Valuable Grain Management Tool. PRESENTED BY: Vikas Shrivastava Asia Sales Manager SCAFCO Grain Systems Co., USA Email – [email protected]. Good Storage Practice. - PowerPoint PPT PresentationTRANSCRIPT
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Relevance of Grain Aeration
Valuable Grain Management Tool
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• Storage of clean grain is important as clean grain helps in
• Preventing mold and insects.• Improving air distribution through the stored mass and
also during Drying, Aeration or Cooling.
• Ensure that Grain is at the recommended moisture level for storage.
• Before storing, the storage facility should be cleaned thoroughly.
www.SCAFCO.com
Good Storage Practice
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Grain Aeration Basics
Why Aerate Grain
Aeration is the practice of moving air through stored grain to reduce the rate of grain deterioration and prevent storage losses. Spoilage in stored grain is caused by mold growth and insect activity, which is related to the moisture content and temperature of the stored grain. Aeration greatly improves the "storability" of grain by maintaining a cool, uniform temperature throughout the storage to reduce mold development and insect activity and to prevent moisture migration.
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Grain Enemies
• Insects• Mold and Fungi• Moisture• Heat
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Why Aerate Grain?
• To condition the dry grain• Conditioned grain
Less mold/fungi growthLess insect activityManaged moistureManaged heat
• Improves chances of successful long term storage
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Why Aerate Grain?
• Because grain is alive– If planted, it will grow– It lives & breathes– It gives up moisture– It absorbs moisture– It will not be harmed by cold temperatures, but it
can be harmed by too much heat
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Why Aerate Grain?
Because •Aeration equalizes moisture
•Aeration equalizes temperature
•Control insect environment
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Moisture - Temperature - Storage Capability
40
30
20
10
Moisture
Tem
per
atu
re
ºC ºF
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Moisture Content
13% 15% 20% 25% 30%
Storage AirTemperature(F) (C)
80.6 °75.2 °69.8 °64.4 °60.8 °55.4 °50.0 °44.6 °39.2 °35.6 °
450
780
1410
2520
4500
871161552072503374667259061140
12.116.121.527.035.048.075.094.0118.0
4.35.87.89.612.514.027.034.042.0
2.63.54.65.87.510.016.020.025.0
27 °24 °21 °18 °16 °13 °10 ° 7 ° 4 ° 2 °
Safe Storage Period (Days)
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Shelled corn Soybeans Wheat and barley Sunflowers
Short term 15.5% 13% 14% 11%
One year 14 12 13 10
Long term 13 11 13 9
Storage moisture Vs Storage Period
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Warm Weather Effects
Warm Air Warm Air
ColdGrain
ColdGrainW
arm
Air
War
m A
ir
War
m G
rain
War
m G
rain
Col
d A
ir S
ettle
s
Spring & Summer
• Moisture migration
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Cool Weather Effects
Cool Air
WarmGrain
WarmGrain
Col
d A
ir S
ettle
sC
old
Gra
in
Col
d G
rain
War
m A
ir R
ises
Fall & Winter
Cool Air
Moisture migration
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Why Aerate Grain?
• To equalize moisture migration
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Aeration Problem
• Center “fines”• Fines material in
grain gather in the center of the silo
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Aeration Solution
• During Silo Filling draw out some grain from silo couple of times center to make cone in grain
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Aeration Problem
• Dirty aeration tunnels
• Plugged floor perforations
• Obstructed roof vents
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Aeration Solution
• Clean silo tunnels, ducts, floors, and roof vents before filling silo
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Aeration Problem
• Over filling silo
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Aeration Solution
• Don’t overfill the silo!
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Aeration Problem
• Spoiled grain on silo wall
• Keep grain temperature near average ambient air temperature to avoid condensation on walls
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When to Aerate
• When grain and outside air temperature not more than 90 C difference
• Before 7 AM or After 7 PM.• Aerate to maintain uniform temperature in
the silo• When you start - you must finish!
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Successful Grain Storage
• Check grain temperatures weekly
• Aerate grain to remove possible “Hot” spots
• Aerate grain to maintain uniform temperature in the silo
• Aerate grain to prevent insects infestations
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5400 East Broadway AvenueP.O. Box 11215
Spokane, Washington 99211-1215, USAToll Free +1.800.224.0676
Telephone +1.509.535.1571Fax: +1.509.535.9130
Email: [email protected]: www.SCAFCO.com