Sustainable Food Drying Techniques in Developing Countries: Prospects and Challenges

1.     Insights into Drying

2.     Energy Requirement in Drying 

3.1   Total Energy

3.3    Renewable Energy 

4.     Existing drying Technologies in Developing Countries

4.1    Sun Drying

4.2    Solar Drying

4.2.1           Active solar drying

4.2.2           Passive solar drying

4.2.3           Mixed mode solar drying

4.2.4           Hybrid solar drying

4.3    Biomass dryer

4.4    Reversible air dryer SRA

4.5    STR Drying 

5.     Proposal of Sustainable drying techniques in Developing Countries

5.1    Improved Solar Drying

5.2    Geothermal Drying

5.3    Hybrid geothermal-solar drying

5.4    Heat pump drying

5.5    Drying using waste heat

5.6    Desiccant based drying

5.7    Improved Biomass Drying

5.8    Hybrid Solar-biomass drying

5.9    Solar derived IMCD

5.10 Osmotic dehydration 

6.     Challenges in Drying Sector

7.     Conclusion