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Plant Science Today (PST)

Research Articles

Early Access

Microcontroller-based solar tunnel dryer for sustainable drying in Northeast India

DOI
https://doi.org/10.14719/pst.4867
Submitted
3 September 2024
Published
30-01-2025
Versions

Abstract

The growing world population necessitated enhanced food availability and reduced waste. Drying has been a popular technique for extending food storage for a long time since it minimizes volume and lowers moisture and enzymatic activity, reducing food loss. This project sought to create a microcontroller-driven solar tunnel dryer designed for the prevalent rainfall and elevated humidity conditions in Northeast India. The designed solar tunnel dryer is equipped with two DHT22 sensors that assess ambient humidity inside and outside the dryer, deciding whether to let airflow with the environment or isolate it. It controls fan operation based on real-time monitoring. The dryer has 12 trays on a six-tray structure that holds 100 kg of sliced turmeric in every batch. An additional tray with a load cell was provided to record turmeric weight during drying. Without any load, the maximum internal temperature exceeded the outside by 27.1°C, while the minimum internal humidity was 30% lower than external values. The turmeric was dried from an initial moisture content of 71.62% to less than 10% (wet basis) over 101 hours and 40 minutes (5 days) with 28.63 effective bright sunshine hours. The developed solar tunnel dryer's average efficiency was 19.20%, demonstrating its ability to dry turmeric in Meghalaya, India.

References

  1. Bradford KJ, Dahal P, Van Asbrouck J, Kunusoth K, Bello P, Thompson J, et al. The dry chain: Reducing postharvest losses and improving food safety in humid climates. Trends Food Sci Technol. 2018;71:84-93. https://doi.org/10.1016/j.tifs.2017.11.002
  2. Food and Agriculture Organization of the United Nations. How to feed the world in 2050. Rome: Food and Agriculture Organization of the United Nations; 2009 [cited 2023 Nov 13]. 35 p. Available from: https://www.fao.org/fileadmin/templates/wsfs/docs/expert_paper/How_to_Feed_the_World_in_2050.pdf
  3. Food and Agriculture Organization of the United Nations. The state of food insecurity in the world: How does International price volatility affect domestic economies and food security? Rome: Food and Agriculture Organization of the United Nations; 2011 [cited 2023 Nov 13]. 55 p. Available from: https://www.uncclearn.org/wp-content/uploads/library/fao_food_insecurity.pdf
  4. Udomkun P, Romuli S, Schock S, Mahayothee B, Sartas M, Wossen T, et al. Review of solar dryers for agricultural products in Asia and Africa: An innovation landscape approach. J Environ Manag. 2020;268:110730. https://doi.org/10.1016/j.jenvman.2020.110730
  5. Chegere MJ. Post-harvest losses reduction by small-scale maize farmers: The role of handling practices. Food Policy. 2018;77:103-15. https://doi.org/10.1016/j.foodpol.2018.05.001
  6. Hodges RJ, Buzby JC, Bennett B. Postharvest losses and waste in developed and less developed countries: Opportunities to improve resource use. J Agric Sci. 2011;149(S1):37-45. https://doi.org/10.1017/S0021859610000936
  7. Food and Agriculture Organization of the United Nations. The state of food insecurity in the world: Addressing food insecurity in protracted crises. Rome: Food and Agriculture Organization of the United Nations; 2010 [cited 2023 Nov 13]. 62 p. Available from: https://www.fao.org/4/i1683e/i1683e.pdf
  8. Sacilik K, Keskin R, Elicin AK. Mathematical modelling of solar tunnel drying of thin layer organic tomato. J Food Eng. 2006;73(3):231-38. https://doi.org/10.1016/j.jfoodeng.2005.01.025
  9. Jibia AU, Umar S. Microcontroller-based fruit drying system. ATBU J Sci Technol Educ. 2015;3(3):102-10.
  10. Devi TB, Kalnar YB. Design consideration of smart solar dryer for precision drying: Smart solar dryer for precision drying. J Agri Search. 2021;8(2):135-38.
  11. Jayashree E, Zachariah TJ. Processing of turmeric (Curcuma longa) by different curing methods and its effect on quality. Indian J Agric Sci. 2016;86(5):696-98. https://doi.org/10.56093/ijas.v86i5.58358
  12. Kaewkiew J, Nabnean S, Janjai S. Experimental investigation of the performance of a large-scale greenhouse type solar dryer for drying chilli in Thailand. Procedia Eng. 2012;32:433-39. https://doi.org/10.1016/j.proeng.2012.01.1290
  13. World Meteorological Organization (WMO). Manual on the Global Observing System. Volume I (Annex V to the WMO Technical Regulations) [Internet]. WMO-No. 544. 2010 [cited 2023 Oct 20]. Available from: https://www.met.gov.fj/icao/volI.pdf
  14. Venkateshwari T, Ganapathy S, Arulmari R, Vijayakumary P. Effect of drying temperature on the curcumin content of turmeric rhizomes (Curcuma longa L.). Pharma Innovation. 2021;10(10):2349-51.
  15. Department of Agriculture Meghalaya. Meghalaya agriculture profile [Internet]. 3rd ed. Meghalaya: Department of Agriculture Meghalaya; 2006 [cited 2023 Oct 7]. Available from: https://www.megagriculture.gov.in/PUBLIC/dwd_docs/MegAgriProfile2006.pdf
  16. Mkhathini KM, Magwaza LS, Workneh TS, Mwithiga G. Effects of relative humidity and temperature on small scale peach fruit drying using a tunnel solar dryer: A case study of peach fruit produced by small scale farmers in the Midlands of Kwazulu-Natal, South Africa. S Afr J Agric Ext. 2018;46(2):1-13. http://dx.doi.org/10.17159/2413-3221/2018/v46n2a454
  17. Mengesha TT. Performance evaluation of forced convection solar dryer under Jimma condition. International Journal of Scientific and Research Publications. 2020;10(06):264-76. https://doi.org/10.29322/IJSRP.10.06.2020.P10232
  18. Chavan BR, Yakupitiyage A, Kumar S. Mathematical modeling of drying characteristics of Indian mackerel (Rastrilliger kangurta) in solar-biomass hybrid cabinet dryer. Dry Technol. 2008;26(12):1552-62. https://doi.org/10.1080/07373930802466872
  19. Gunasekar JJ, Kaleemullah S, Doraisamy P, Kamaraj S. Evaluation of solar drying for postharvest curing of turmeric (Curcuma longa L.). AMA Agric Mech Asia Afr Lat Am. 2006;37(1):9-13.
  20. Condorí M, Echazú R, Saravia L. Solar drying of sweet pepper and garlic using the tunnel greenhouse drier. Renew Energy. 2001;22(4):447-60. https://doi.org/10.1016/S0960-1481(00)00098-7
  21. Kumar M, Mahore A, Choudhary MK, Lalita, Nalawade R, Patel A, et al. Development of mini solar tunnel dryer and validation of thin layer drying models for pomegranate seeds. Int J Environ Clim Change. 2023;13(2):42-49. https://doi.org/10.9734/IJECC/2023/v13i21651
  22. Dattatreya MK, Nangare DD, Singh R, Kumar S. Low-cost greenhouse technology for drying onion (Allium cepa L.) slices. J Food Process Eng. 2011;34(1):67-82. https://doi.org/10.1111/j.1745-4530.2008.00337.x
  23. Devi TB, Singh SK, Mani I, Kumar S, Yadav V, Singh Y, et al. Solar dryer using evacuated tube solar thermal collector with thermal storage. Indian J Agri Sci. 2023;93(2):233-36. https://doi.org/10.56093/ijas.v93i2.109915

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