MECHANIZATION IN AGRICULTURE
Enhancing the Drying Efficiency and Quality Preservation of Medicinal and Aromatic Plants through Innovative Solar Drying Systems in Albania
- 1 Department of Agronomy Sciences, Faculty of Agriculture and Environment, Agricultural University of Tirana, Albania
Abstract
Albania has a long tradition in the collecting, cultivation and export of medicinal and aromatic plants (MAPs), with more than 400 wild species of economic importance, representing nearly 15% of the country’s flora. Drying is a key post-harvest process that affects moisture reduction, microbial stability, and preservation of bioactive compounds, essential oils, color, and overall product quality. This study evaluates innovative solar-powered drying systems for medicinal and aromatic plants and mountain fruits in Bilisht and Ersekë, Albania. Data collected from March to August 2023 included fresh biomass weight, layer thickness, biomass density, drying temperature and
duration, relative humidity, ambient temperature, and final dry biomass. The systems incorporated heat-absorbing materials and transparent covers to improve solar energy capture and airflow control. Drying temperature and duration were identified as the main factors affecting the physical, microbiological, and phytochemical quality of dried products. Results showed that solar drying systems reduced drying time and improved product quality compared with traditional drying methods. These findings suggest that innovative solar drying systems can improve energy efficiency, preserve product quality, and increase the commercial value of medicinal and aromatic plants in Albania.
Keywords
References
- A. Ibraliu , L Kashta , E. Shehu , & G. Josevski . Medicinal and aromatic plant sector in Albania: Current status, challenges and perspectives. Industrial Crops and Products, 215, 118672 (2025)
- IUCN. The IUCN Red List of Threatened Species — Albania Country Assessment. IUCN (2018).
- W. Kathe, S. Honnef, & A. Heym Medicinal and aromatic plants in Albania, Bosnia-Herzegovina, Bulgaria, Croatia and Romania. Federal Agency for Nature Conservation (BfN), Bonn (2003)
- N. Kadiasi, G Kokona, & A. Bello. Value chain analysis of medicinal and aromatic plants in southeastern Albania: Socioeconomic perspectives. Journal of Rural Studies, 112, 103452 (2025)
- Food and Agriculture Organization of the United Nations (FAO). The State of the World's Forest Genetic Resources — Country Report Albania. FAO (2022)
- E. Krasniqi, B. Mustafa, A. Hajdari, Z. Maleš, & C.L. Quave. Traditional herbal medicine in Rugova Region, Kosovo. Evidence-Based Complementary and Alternative Medicine, 1–21. https://doi.org/10.1155/2020/5643580 (2020)
- T. Antal, B. Kerekes, L. Sikolya, & M.A. Tarek. Quality comparison of air- and freeze-dried elderberry (Sambucus nigra L.). Acta Alimentaria, 40 (S1), 17–27. https://doi.org/10.1556/AAlim.40.2011.Suppl.3 (2011).
- J. Müller, &A. Heindl. Drying of medicinal plants. In R. J. Bogers, L. E. Craker, & D. Lange (Eds.), Medicinal and Aromatic Plants (pp. 237–252). Springer. https://doi.org/10.1007/1-4020-5062-8_18 (2006)
- R.P. Rocha, E.C. Melo, & L.L Radünz Influence of drying process on the quality of medicinal plants: A review. Journal of Medicinal Plants Research, 5(33), 7076–7084 (2011)
- European Medicines Agency (EMA). Guideline on quality of herbal medicinal products/traditional herbal medicinal products (EMA/CPMP/QWP/2819/00 Rev. 2) (2012)
- World Health Organization (WHO). WHO Monographs on Selected Medicinal Plants, Volume 3. WHO Press (2007)
- D. Pimentel, H. Acquay, M. Biltonen, P. Rice, M. Silva, J. Nelson, V. Lipner, S. Giordano, A. Horowitz, & M. D'Amore. Environmental and economic costs of pesticide use. BioScience, 42(10), 750–760 (2011)
- A.R.P. Kingsly, & D.B. Singh Drying kinetics of pomegranate arils. Journal of Food Engineering, 79(2), 741–747. https://doi.org/10.1016/j.jfoodeng.2006.02.033 (2007)
- O.V. Ekechukwu, & B. Norton. Review of solar-energy drying systems II: An overview of solar drying technology. Energy Conversion and Management, 40(6), 615–655. https://doi.org/10.1016/S0196-8904(98)00093-4 (1999)
- A. Fudholi, K. Sopian, M.H. Ruslan, M.A. Alghoul & M.Y. Sulaiman. Review of solar dryers for agricultural and marine products. Renewable and Sustainable Energy Reviews, 14(1), 1–30. https://doi.org/10.1016/j.rser.2009.07.032 (2010)
- S. Chouicha, A. Boubekri, D. Mennouche & G. Berrbecel. Solar drying of sliced potato. An experimental investigation. Energy Procedia, 36, 1276–1285. https://doi.org/10.1016/j.egypro.2013.07.144(2013)
- A.A El-Sebaii, & S.M. Shalaby. Solar drying of agricultural products: A review. Renewable and Sustainable Energy Reviews, 16(1), 37–43. https://doi.org/10.1016/j.rser.2011.07.134 (2012)
- I. Doymaz. Thin-layer drying behaviour of mint leaves. Journal of Food Engineering, 74(3), 370–375. https://doi.org/10.1016/j.jfoodeng.2005.03.009 (2006)
- A. Kaleta, & K. Górnicki, K. Evaluation of drying models of apple (var. McIntosh) dried in a convective dryer. International Journal of Food Science and Technology, 45(5), 891–898. https://doi.org/10.1111/j.1365-2621.2010.02230.x (2010)