Use of vinasse to produce slow-release coated urea in spouted bed

Authors

  • Gabriela Silveira da Rosa,

    Corresponding author
    1. Chemical Engineering, Federal University of Pampa 45 Avenue 1650, Zip Code 96413-170, Bagé, Rio Grande do Sul, Brazil
    • Chemical Engineering, Federal University of Pampa 45 Avenue 1650, Zip Code 96413-170, Bagé, Rio Grande do Sul, Brazil
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  • Sandra Cristina dos Santos Rocha

    1. School of Chemical Engineering, University of Campinas, UNICAMP, Albert Einstein Avenue, 500, Zip Code 13083-852, Campinas, São Paulo, Brazil
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Abstract

The aim of this work was to evaluate the influence of the operating conditions on the coating efficiency for urea coated in a spouted bed and to analyse the decrease of nitrogen volatilisation for the coated urea. Coating efficiencies in the range (from 44.24% to 73.7%) were obtained for the different process conditions applied. Volatilisation analyses showed that the polymer film coating provided a decrease of the nitrogen loss in the range from 3% to 57%. The use of vinasse in substitution to the water in the coating suspension was tested for the optimum process conditions. © 2012 Canadian Society for Chemical Engineering

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