B.Tech. Agricultural Engineering · Semester 4

Post-harvest Engineering of Cereals, Pulses and Oilseeds

PFE4.8 Processing & Food Engineering

Syllabus lecture plan

1. 01General unit operations in agricultural process engineering and importance 1 of these unit operations in grain processing; Structure and composition of cereals, pulses and oil seeds
2. 02Cleaning and grading: Principles of cleaning, scalping, sorting and grading; 4 screens, different types of screen separators, fixed and variable aperture screens, capacity and effectiveness of screens, sieve analysis; various types of separators as specific gravity, magnetic, disc, spiral, pneumatic, inclined belt draper, velvet roll separator, colour sorter, cyclone separator
3. 03Drying: Moisture content and water activity, free moisture, bound moisture 6 and equilibrium moisture content, isotherm, hysteresis effect, EMC determination; Psychrometric chart and its use in drying; Drying principles and theory, thin layer and deep bed drying analysis, falling rate and constant rate drying periods, maximum and decreasing drying rate periods, drying equations, mass and energy balance, Shedd's equation; Drying methods (conduction, convection, radiation, batch, continuous); Different types of grain dryers (bin, flat bed, LSU, columnar, RPEC, fluidized, rotary and tray), tempering during drying; dryer performance
4. 04Principles of grain storage; different types of grain storage structures; deep 3 bin and shallow bin; design of a silo, structural and functional requirements of a grain storage go-down
5. 05Size reduction: Principle; Bond's law, Kick's law, Rittinger's law; Sieve 3 analysis; Different classifications of size reduction machines; description of jaw crusher, hammer mill, attrition mill, and ball mill
6. 06Material handling: Basic parts of different types of conveyors and elevators, 4 viz. belt, roller, chain, screw, and bucket elevator, cranes and hoists, pneumatic conveying, power requirement for conveying and elevating
7. 07Milling of rice: Parboiling- merits and demerits, changes during parboiling 4 of rice, parboiling methods, viz. traditional methods, CFTRI method
8. 08Milling of wheat: Unit operations and equipment; Milling of corn: unit 2 operations and equipment in dry and wet milling methods
9. 09Milling of pulses: pre-conditioning, dry milling and wet milling methods
10. 10Milling of oilseeds: preconditioning of oilseeds, mechanical expression, 3 screw press, hydraulic press, solvent extraction method, refining of oil, stabilization of rice bran

Part of the B.Tech. Agricultural Engineering curriculum (ICAR recommendations). Upload or find notes, previous-year papers and quick-revision reels for each lecture on theciae.