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Optimization of drying process parameters for cauliflower drying

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Abstract

The different sizes (3, 4 and 5 cm) of hybrid variety of cauliflower (variety no. 71) were dehydrated in thin layer at three temperatures of 55, 60 and 65 °C with velocities of 40, 50 and 60 m/min. Dehydrated samples were analyzed for vitamin C, rehydration ratio and browning. Statistical analysis indicated that drying time was dependent on initial size of cauliflower, drying air temperature and velocity, but rehydration ratio was significantly affected by the combined effect of temperature and airflow velocity. Vitamin C content of the dried cauliflower samples were significantly affected by temperature only and non enzymatic browning was function of temperature, airflow velocity, and combined effect of temperature and airflow velocity. Optimization of the drying process parameters for the given constraints resulted in 60.100C, 59.28 m/min, 3.35 cm. The predicted responses for the optimized combination of process parameters were time, vitamin C content, rehydration ratio, and browning values of 491.22 min (time), 289.86 mg/100 g (Vitamin C), 6.91 ( rehydration ratio), and 0.14 (browning), respectively with the desirability factor of 0.787.

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Abbreviations

W:

Weight of sample g

MRt :

Multi-meter reading at any time t mv

Dm/Dt:

Drying rate % moisture loss per minute

Mi :

Moisture content (% d b) of sample at time ti

Mi+1 :

Moisture content (%d b) of sample at time ti+1

A:

Weight of sample before rehydration g

B:

Weight of sample after rehydration g

DT:

Drying air temperature °C

AV:

Drying air velocity m/min

S:

Cauliflower Size cm

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Authors and Affiliations

  1. Central Institute of Post Harvest engineering and Technology, P.O. P.A.U. Campus, Ludhiana, Punjab, India

    Manoj Kumar Gupta

  2. Department of Processing and Food Engineering, College of Agricultural Engineering, Punjab Agricultural University, Ludhiana, India

    V. K. Sehgal & Sadhna Arora

Authors
  1. Manoj Kumar Gupta
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  2. V. K. Sehgal
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  3. Sadhna Arora
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Correspondence to Manoj Kumar Gupta.

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Gupta, M.K., Sehgal, V.K. & Arora, S. Optimization of drying process parameters for cauliflower drying. J Food Sci Technol 50, 62–69 (2013). https://doi.org/10.1007/s13197-011-0231-5

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  • DOI: https://doi.org/10.1007/s13197-011-0231-5

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