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PHT 624 ADVANCE STORAGE ENGINEERING                                                                               (2L+1P) III

Objective
Expose the students to the large scale handling and storage mechanism of grains, engineering operations and the control of physical, chemical and biological spoilage during storage of grains.

Theory

UNIT I
Physico-chemical and thermal properties of grains - grain dimensions, bulk density, true density, porosity, coefficient of friction, angle of repose, thermal conductivity and aerodynamic properties. humidity, % relative humidity, humid heat, deterioration index, wet bulb temperature, use of psychrometric charts,

UNIT II
Grain drying, equilibrium moisture content. Storage environment and its interaction with stored products, factors/ parameters influencing the shelf life of the stored products; storage practices (including fumigation) and structures (traditional and modern) for food grains;

UNIT III
Climatograph and deterioration index. modeling of metabolic activities and prediction of storage life, quality deterioration mechanisms and their control;

UNIT IV
Design of bulk storage and aeration system, analysis of heat, moisture and gas transfer in bulk storage structures; quality analysis of stored produce; bag storage structures, their design and management.

Practicals
Determination of bulk density, true density and porosity of grains, determination of angle of repose and coefficient of friction, measurement of water activity of grains, determination of grain moisture content, identification of storage insects-pests, determination of EMC, determination of grain hardness , study of designs of storage bins and godowns as per capacity requirement, visit to storage lab. Plotting of sorption isotherm and calculation of EMC, computation of doses of insecticides in ware house, visit of commercial godowns, identification of common storage insect.

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