Combined refractance window and far infrared radiation drying of Spirulina platensis biomass: Drying behavior, moisture and thermal diffusivity, and biochemical characterization.

Hitesh, J. and Deependra, Rajoriya and Chauhan, V. S. and Umesh Hebbar, H. Combined refractance window and far infrared radiation drying of Spirulina platensis biomass: Drying behavior, moisture and thermal diffusivity, and biochemical characterization. Drying Technology, 42 (8). pp. 1312-1328.

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Abstract

A 2 mm thin layer of wet Spirulina platensis biomass was dried using two methods: refractance window drying (RW) and combined RW and FIR drying (RWF). The effect of drying temperature (40–60 �C) and proximity to FIR heaters (5 and 10 cm) was evaluated on falling rate drying characteristics. The moisture (Deff) and thermal (a) diffusivity coefficients were obtained in the range 1.728�10−8 to 5.289�10−9 and 1.322�10−8 to 4.169�10−9 m2 s−1, respectively (R2, 0.921–0.984). RW drying at �50 �C caused loss of color, phytopigments, and lipid peroxidation. At 40 �C, RW drying led to a long drying period (300.50 ± 3.53 min), poor drying rate (0.039 ± 0.002 g-H2O/min), lowest Deff and a (5.289�10−9 and 4.169�10−9 m2 s−1), and chlorophyll loss (32.2%). Combined RW and FIR drying at 40 �C and 5 cm proximity (RWF40-5cm) reduced drying time (15.1%), increased drying rate (27.8%), improved a (15%), and Deff (14.9%). RWF40-5cm dried biomass showed excellent retention of color (DE¼4.64 ± 1.32), protein (93.8%), c-linolenic acid (90.1%), chlorophyll (87.9%), and phycocyanin (86.7%) from freeze-dried biomass (FD). Low-temperature RWF40-5cm drying could be a potential alternative to freeze-drying for effective and safe drying of heat-sensitive Spirulina platensis biomass.

Item Type:	Article
Uncontrolled Keywords:	Far infrared radiation; moisture diffusivity; phycocyanin retention; refractance window drying; Spirulina platensis biomass; thermal diffusivity
Subjects:	500 Natural Sciences and Mathematics > 08 Botanical sciences > 01 Botany > 01 Algae 600 Technology > 08 Food technology > 06 Preservation and Storage > 02 Drying and Dehydration
Divisions:	Food Engineering Plant Cell Biotechnology
Depositing User:	Food Sci. & Technol. Information Services
Date Deposited:	11 Nov 2024 09:47
Last Modified:	11 Nov 2024 09:47
URI:	http://ir.cftri.res.in/id/eprint/18471

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