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Journal of Food Science and Technology

, Volume 55, Issue 12, pp 5098–5105 | Cite as

Ultrasound pre-treatment prior to unripe banana air-drying: effect of the ultrasonic volumetric power on the kinetic parameters

  • Carla I. A. La Fuente
  • Carmen C. Tadini
Original Article
  • 50 Downloads

Abstract

Aiming to decrease the water content during the air-drying process of unripe banana slices, ultrasound (US) pre-treatments (25 °C) for 20 and 25 min at 9.38 and 25.63 W/L ultrasonic volumetric power were evaluated. Air-drying was performed at 50 and 60 °C for 360 min. Unripe banana slices pretreated at 25.63 W/L did not improve water migration, under either air-drying temperature, while slices pretreated at 9.38 W/L resulted in an increase in water effective diffusivity of 4.8 and 13.7% at 20 min US + air-drying at 50 °C and 25 min US + air-drying at 60 °C, respectively. The drying time saving of 7% and 9%, respectively, was achieved, showing that these treatments were alternative for processing unripe banana slices. Thus, ultrasound and air-drying operational parameters required accurately defined to achieve desirable results. Experimental data were adjusted to four models and the Midilli model resulted in the best experimental data fit, with r2 > 0.9988, RMSE < 0.0873 and χ2 < 0.00996.

Keywords

Kinetics Water effective diffusivity Activation energy Drying curves 

List of symbols

a

Constant of Logarithmic and Midilli’s models (–)

b

Constant of Midilli’s model (1/min)

c

Constant of Logarithmic model (–)

Cp

Specific heat (J/g K)

Deff

Water effective diffusivity (m2/s)

D0

Arrhenius factor (m2/s)

Ea

Activation energy (kJ/mol)

k

First order constant of semi-empirical drying models (1/min)

L

Sample half-thickness (m)

m

Mass (g)

MR

Moisture ratio (–)

n

Constant of Page and Midilli’s model (–)

PUS

Ultrasonic volumetric power (W/L)

R

Universal constant of gases (8.1314 J/mol K)

t

Time (min)

T

Temperature (°C)

V

Volume (L)

x

Moisture content on wet basis (g H2O/g)

X

Moisture content on dry basis (g H2O/g)

WG

Water gain (g/100 g)

Subscripts

0

Initial

e

Equilibrium

US

Ultrasound

Notes

Acknowledgements

The authors acknowledge the financial support from the São Paulo Research Foundation (FAPESP) under Grants 2011/22398-0 and 2013/07914-8, the scholarship provided by the Coordination for the Improvement of Higher Education Personnel (CAPES, Finance Code 001) and by CNPq (National Council for Scientific and Technological Development) under Grant 306440/2013-0. Thanks to Prof. Antonio Carlos Teixeira (Dept. of Chemical Engineering, Escola Politécnica, University of São Paulo) for allowing the use of ultrasound bath (FISHER SCIENTIFIC, model FS 110, USA).

References

  1. Azoubel PM, Melo BM, Rocha AM, Sorelly BO (2010) Effect of ultrasound on banana cv. Pacovan drying kinetics. J Food Eng 97:194–198.  https://doi.org/10.1016/j.jfoodeng.2009.10.009 CrossRefGoogle Scholar
  2. Capelo JL, Maduro C, Vilhena C (2005) Discussion of parameters associated with the ultrasonic solid–liquid extraction for elemental analysis (total content) by electro-thermal atomic absorption spectrometry: an overview. Ultrason Sonochem 12:225–232.  https://doi.org/10.1016/j.ultsonch.2003.10.010 CrossRefPubMedGoogle Scholar
  3. Cárcel JA, Garcia-Pérez JV, Riera E, Roselló C, Mulet A (2014) Drying assisted by power ultrasound. In: Tsotsas E, Mujundar AS (eds) Modern drying technology—process intensification. Wiley, New York, pp 237–277Google Scholar
  4. Crank J (1975) Diffusion in a plate sheet. In: House E, London W (eds) The mathematics of diffusion, 2nd edn. Oxford University Press, Uxbridge, pp 51–75Google Scholar
  5. Fernandes FAN, Rodrigues S (2007) Ultrasound as pre-treatment for drying of fruits: dehydration of banana. J Food Eng 82:261–267.  https://doi.org/10.1016/j.jfoodeng.2007.02.032 CrossRefGoogle Scholar
  6. Kek SP, Chin NL, Yusof YA (2013) Direct and indirect power ultrasound assisted pre-osmotic treatments in convective drying of guava slices. Food Bioprod Process 91:495–506.  https://doi.org/10.1016/j.fbp.2013.05.003 CrossRefGoogle Scholar
  7. Kikuchi T, Uchida T (2011) Calorimetric method for measuring high ultrasonic power using water as a heating material. J Phys 279:1–5.  https://doi.org/10.1088/1742-6596/279/1/012012 CrossRefGoogle Scholar
  8. Kim MH, Toledo RT (1987) Effect of osmotic dehydration and high temperature fluidized bed drying on properties of dehydrated rabbiteye blueberries. J Food Sci 52(4):980–984.  https://doi.org/10.1111/j.1365-2621.1987.tb14256.x CrossRefGoogle Scholar
  9. Knorr D, Froehling A, Jaeger H, Reineke K, Schlueter O, Schoessler K (2011) Emerging technologies in food processing. Ann Rev Food Sci Technol 2:203–235.  https://doi.org/10.1146/annurev.food.102308.124129 CrossRefGoogle Scholar
  10. Koua KB, Fassinou WF, Gbaha P, Toure S (2009) Mathematical modelling of the thin layer solar drying of banana, mango and cassava. Energy 34:1594–1602.  https://doi.org/10.1016/j.energy.2009.07.005 CrossRefGoogle Scholar
  11. Midilli A, Kucuk H, Yapar Z (2002) A new model for single-layer drying. Dry Technol Int J 20(7):1503–1513.  https://doi.org/10.1081/DRT-120005864 CrossRefGoogle Scholar
  12. Mulet A, Cárcel JA, Sanjuan N, Bon J (2003) New food drying technologies: use of ultrasound. Food Sci Technol 9:215–221.  https://doi.org/10.1177/1082013203034641 CrossRefGoogle Scholar
  13. O’Callaghan JR, Menzies DJ, Bailey PH (1971) Digital simulation of agricultural drier performance. J Agric Eng Res 16(3):223–244.  https://doi.org/10.1016/S0021-8634(71)80016-1 CrossRefGoogle Scholar
  14. Park KJ, Yado MK, Brod FP (2001) Estudo de secagem de Pera Bartlett (Pyrus sp.). Ciênc Tecnol Aliment 21:288–292Google Scholar
  15. Park KJ, Antonio GC, Oliveira RA, Park KJB (2007) Conceito de processo e equipamentos de secagem. University of Campinas (SP), Campinas. http://www.feagri.unicamp.br/ctea/projpesq.html. Accessed 12 May 2015
  16. Patero T, Augusto PED (2015) Ultrasound (US) enhaces the hydration of sorghum (Sorghum bicolor). Ultrason Sonochem 23:11–15.  https://doi.org/10.1016/j.ultsonch.2014.10.021 CrossRefPubMedGoogle Scholar
  17. Ricce C, Rojas ML, Miano AC, Siche R, Augusto PED (2016) Ultrasound pre-treatment enhances the carrot drying and rehydration. Food Res Int 89:701–708.  https://doi.org/10.1016/j.foodres.2016.09.030 CrossRefPubMedGoogle Scholar
  18. Rodrigues S, Fernandes FAN (2008) Ultrasound in fruit processing. In: Urwaye AP (ed) New food engineering research trends. Nova Science Publisher, New York, pp 103–135Google Scholar
  19. Santacatalina JV, Contreras M, Simal S, Cárcel JA, Garcia-Perez JV (2016) Impact of applied ultrasonic power on the low temperature drying of apple. Ultrason Sonochem.  https://doi.org/10.1016/j.ultsonch.2015.06.027 CrossRefPubMedGoogle Scholar
  20. Schössler K, Jäger H, Knorr D (2012a) Effect of continuous and intermittent ultrasound on drying time and effective diffusivity during convective drying of apple and red bell pepper. J Food Eng 108:103–110.  https://doi.org/10.1016/j.jfoodeng.2011.07.018 CrossRefGoogle Scholar
  21. Schössler K, Thomas T, Knorr D (2012b) Modification of cell structure and mass transfer in potato tissue by contact ultrasound. Food Res Int 49:425–431.  https://doi.org/10.1016/j.foodres.2012.07.027 CrossRefGoogle Scholar
  22. Sharma GP, Prasad S (2004) Effective moisture diffusivity of garlic cloves undergoing microwave-convective drying. J Food Eng 65:609–617.  https://doi.org/10.1016/j.jfoodeng.2004.02.027 CrossRefGoogle Scholar
  23. Tribess TB, Hernandez-Uribe JP, Mendez-Montealvo MGC, Menezes EW, Bello-Perez LA, Tadini CC (2009) Thermal properties and resistant starch content of green banana flour (Musa cavendishii) produced at different drying conditions. LWT Food Sci Technol 42:1022–1025.  https://doi.org/10.1016/j.lwt.2008.12.017 CrossRefGoogle Scholar
  24. Vinatoru M (2015) Ultrasonically assisted extraction (UAE) of natural products some guidelines for good practice and reporting. Ultrason Sonochem 25:94–95.  https://doi.org/10.1016/j.ultsonch.2014.10.003 CrossRefPubMedGoogle Scholar
  25. Witrowa-Rajchert D, Wiktor A, Sledz M, Nowacka M (2014) Selected emerging technologies to enhance the drying process: a review. Dry Technol 32:1386–1396.  https://doi.org/10.1080/07373937.2014.903412 CrossRefGoogle Scholar
  26. Yaldiz O, Ertekin C, Uzun HI (2001) Mathematical modeling of thin layer solar drying of sultana grapes. Energy 26(5):457–465.  https://doi.org/10.1016/S0360-5442(01)00018-4 CrossRefGoogle Scholar
  27. Yao Y, Zhang W, Liu S (2009) Feasibility study on power ultrasound for regeneration of silica gel—a potential desiccant used in air-conditioning system. Appl Energy 86:2394–2400.  https://doi.org/10.1016/j.apenergy.2009.04.001 CrossRefGoogle Scholar
  28. Yildirim A, Durdu OM, Bayram M (2011) Fitting Fick’s model to analyze water diffusion into chickpeas during soaking with ultrasound treatment. J Food Eng 104(1):134–142.  https://doi.org/10.1016/j.jfoodeng.2010.12.005 CrossRefGoogle Scholar
  29. Zabalaga RF, La Fuente CIA, Tadini CC (2016) Experimental determination of thermophysical properties of unripe banana slices (Musa cavendishii) during convective drying. J Food Eng 187:62–69.  https://doi.org/10.1016/j.jfoodeng.2016.04.020 CrossRefGoogle Scholar
  30. Zenebon O, Pascuet NS (2008) Métodos fisico-químicos para análises de alimentos do Instituto Adolfo Lutz, 4th edn. Instituto Adolfo Lutz, São PauloGoogle Scholar
  31. Zhang Q, Litchfield JB (1991) An optimization of intermittent corn drying in a laboratory scale thin layer dryer. Dry Technol Int J 9(2):383–395.  https://doi.org/10.1080/07373939108916672 CrossRefGoogle Scholar
  32. Zhao Y, Wang W, Zheng B, Miao S, Tian Y (2017) Mathematical modeling and influence of ultrasonic pretreatment on microwave vacuum drying kinetics of lotus (Nelumbo nucifera Gaertn) seeds. Dry Technol 35(5):553–563.  https://doi.org/10.1080/07373937.2016.1193512 CrossRefGoogle Scholar

Copyright information

© Association of Food Scientists & Technologists (India) 2018

Authors and Affiliations

  1. 1.Department of Chemical Engineering, Escola PolitécnicaUniversity of São PauloSão PauloBrazil
  2. 2.Food Research Center (FoRC/NAPAN)University of São PauloSão PauloBrazil

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