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Licensed Unlicensed Requires Authentication Published by De Gruyter February 11, 2015

Standardization of Curing and Microwave Drying of Turmeric (Curcuma longa) Rhizomes

Santosh Gagare, V.D. Mudgal, P.S. Champawat and Amit Pisal


Curing and drying are important unit operations in turmeric processing for production of good quality products. Optimization of the process parameters for curing and microwave drying of turmeric is the need of hour for quality production of dried turmeric. These parameters were optimized by conducting trials for curing (boiling in 0.1% sodium carbonate solution for 15, 30 and 45 min) and microwave drying (power levels of 1, 1.5 and 2 kW). The cured as well as dried rhizomes were evaluated for quality parameters. The optimum boiling time for curing and power level for microwave drying of turmeric rhizomes was found to be 30 min and 1.5 kW for quality production.


1. JacobB. Turmeric quality requirements of importing countries. In: SivadasanCR, DevanandaSN editors. Quality improvement of turmeric. Kochi: Spices Board of India, 1995.Search in Google Scholar

2. PursegloveJM, BrownEG, GreenCL, RobbinSRJ. Spices. Vol 2. London: Longman Group Ltd, 1981.Search in Google Scholar

3. DawnCP, ShreenarayananVV. Studies on dehydration of garlic. J Food Sci Technol1998;35:242-4.Search in Google Scholar

4. PruthiJS. Major Spices of India- Crop management and post-harvest technology. New Delhi: ICAR, 1993.Search in Google Scholar

5. JoseKP, JoyCM. Solar tunnel dryer assisted post-harvest curing of ginger. In: Proceedings of Swadeshi Vijnana Mela. Centre for Bharatiya Marketing Development, Hyderabad, 2005.Search in Google Scholar

6. TulasidasTN, RaghavanGS, MujumdarAS. Microwave drying of grapes in a single mode cavity at 2450 MHz–II. Quality and energy aspects. Drying Technol1995;13:197392.Search in Google Scholar

7. SangaE, MujumdarAS, RaghavanGSV. Principals and application of microwave drying. In: MujumdarAS editors. Drying technology in agriculture and food sciences. Enfield, NH: Science Publishers, Inc., 2000.Search in Google Scholar

8. DecareauRV, PetersonRA. Microwave processing and engineering. Ellis Horwood Series in Food Science and Technology. VCH publishers, 1986. (ISBN 3527262105, 9783527262106).Search in Google Scholar

9. RangannaS. Handbook of analysis and quality control for fruit and vegetable products. 2nd ed. New Delhi: Tata McGraw Hill Book Company, 2000.Search in Google Scholar

10. Mohsenin NuriN. Physical properties of plant and animal materials. New York: Gordon and Breach, 1970.Search in Google Scholar

11. SharmaPD, SinhaMK, KumarV. Curing characteristics and quality evaluation of turmeric finger. J Agric Eng2008;45:5861.Search in Google Scholar

12. SnedecorGW, CochranWG. Statistical methods. Calcutta, India: Oxford and IBH Publishing Co, 1968.Search in Google Scholar

13. ThimmaiahSK. Standard methods of biochemical analysis. Ludhiana, India: Kalyani Publishers, 1999.Search in Google Scholar

14. MaskanM.Microwave/air and microwave finish drying of banana. J Food Eng2000;44:718.Search in Google Scholar

15. DoymazI. Convective air drying characteristics of thin layer carrots. J Food Eng2004;61:35964.Search in Google Scholar

16. GovindarajanVS. Turmeric – chemistry, technology and quality. CRC Crit Rev Food Sci Nutr1980;12:199301.Search in Google Scholar

17. Bambirra MariaLA, Junqueira RobertoG, Gloria MariaBA. Influence of post-harvest processing conditions on yield and quality of ground turmeric (curcuma longa L. Braz Arch Biol Technol2002;45:4239.Search in Google Scholar

18. VarshneyAK, GaralaSN, AkbariSH. Effect of curing on physical characteristics of turmeric. J Agric Eng2004;2:1619.Search in Google Scholar

19. SureshD, ManjunathaH, SrinivasanK. Effect of heat processing of spices on the concentrations of their bioactive principles: turmeric (curcuma longa), red pepper (capsicum annuum) and black pepper (piper nigrum). J Food Compos Anal2007;20:34651.Search in Google Scholar

20. LokhandeSM, KaleRV, SahooAK, RanveerRC. Effect of curing and drying methods on recovery, curcumin and essential oil content of different cultivars of turmeric (curcuma longa L). Int Food Res J2013;20:7459.Search in Google Scholar

21. ShindeGU, KambleKJ, HarkariMG, MoreGR. Process optimization in turmeric heat treatment by design and fabrication of blancher. Int Conf Environ Agric Eng IPCBEE2011;15:3641.Search in Google Scholar

22. PrabhanjanDG, RamaswamyHS, RaghavanGSV. Microwave-assisted convective air drying of thin layer carrots. J Food Eng1995;25:283.Search in Google Scholar

23. SoysalY. Microwave drying characteristics of parsley. Bio Syst Eng2004;89:16773.Search in Google Scholar

24. ParveenS, KailappanR, DhananchezhiyanP. Studies on shrinkage of turmeric rhizomes during drying. Int J Food Nutr Sci2013;2:304, e-ISSN 2320–7876.Search in Google Scholar

25. MuletA, BlascoM, Garcia-reverterJ, Garcia-perezJV. Drying kinetics of curcuma longa rhizomes. E J Food Sci2005;70:31823.Search in Google Scholar

26. HuangB, WangG, ChuZ, QinL. Effect of oven drying, microwave drying and silica gel drying methods on the volatile components of ginger (zingiber officinale roscoe) by HS-SPME-GC-MS. Drying Technol2012;30:24855.Search in Google Scholar

Published Online: 2015-2-11
Published in Print: 2015-4-1

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