Post harvest engineering introduction objectives post harvest losses of cereals, pulses and oilseeds importance optimum stage of harvest. Threshing traditional methods mechanical threshers - types principles and operation-moisture content measurement direct and indirect methods moisture meters equilibrium moisture content. Engineering properties of agricultural produces.
Psychrometry importance Psychrometric charts and its uses - Drying principles and theory of drying - thin layer and deep bed drying - Hot air drying - methods of producing hot air - Types of grain dryers - selection - construction, operation and maintenance of dryers - Design of dryers
Principles air screen cleaners adjustments cylinder separator- spiral separator magnetic separator- colour sorter-inclined belt separator length separators -effectiveness of separation and performance index
Principles and operation maize sheller, husker sheller for maize - groundnut decorticator-castor sheller -material handling belt conveyor screw conveyor chain conveyor-bucket elevators-pneumatic conveying.
Paddy processing parboiling of paddy methods - merits and demerits dehusking of paddy-methods merits and demerits rice polishers types constructional details -polishing-layout of modern rice mill wheat milling pulse milling methods Millets and Winnower oil seed processing.
Reference Book:
1. Sahay, K.M., and Singh, K.K. Unit operations of Agricultural Processing. Vikas publishing house Pvt. Ltd.,New Delhi, 1994. 2. W.L. McCabe and J.C. Smith and P.Harriot Unit Operations in Chemical Engineering, McGraw Hill Inc.Kosaido Printing Ltd. Tokyo, Japan, 2001. 3. Pande, P.H. Principles of Agricultural Processing, Kalyani Publishers, Ludhiana,pp-278, 1994.
Text Book:
1. Chakraverthy, A ,Third Edition, Post harvest technology for Cereals, Pulses and Oilseeds. Oxford & IBH publication & Co. Pvt. Ltd, New Delhi, 2000. 2. Mohsenin, N.N., Physical Properties Of Plant And Animal Materials, Gordon and Breach publishers, NewYork,pp-1206, 1986.
