Abstract

CIRO VELASQUEZ, Héctor José; MENEGALLI, Florencia Cecilia  and  LOPES DA CUNHA, Rosiane. Drying of l-Carrageenan Using a Two Dimensional Spouted Fluidized Bed Dryer. Rev. Fac. Nac. Agron. Medellín [online]. 2012, vol.65, n.1, pp.6519-6529. ISSN 0304-2847.

Abstract. l-carrageenan suspensions were dried using a two dimensional spouted fluidized bed dryer with inert particles of ABS (acrylonitrile butadine styrene). The dryer performance (powder production and solid retention) and quality properties of final product (rheological properties and moisture content) were evaluated. According to results the mean powder production of l-carrageenan using ABS as inert particle was of 23% with a solid retention of 71%. The most significant variable in the drying of suspension was the feed mass flow rate, as its increase produced a diminishing of the powder production and increasing of the solids retention in the bed. The reconstituted suspensions of l-carrageenan obtained from optimized conditions of drying formed highly pseudoplastic suspensions with viscoelastic properties of highly diluted (G''>G') systems. In addition, the rheological characteristics as viscosity, storage (G') and loss moduli (G'') were lower than commercial gum.

Keywords : Rheology; texture; viscocity; carbohydrate.

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