Spray drying of coffee leaf extract

Authors

  • Jefferson Luiz Gomes Corrêa Universidade Federal de Lavras
  • Kamilla Soares de Mendonça Universidade Federal de Lavras
  • Leonardo Reis Rodrigues Universidade Federal de Lavras
  • Mário Lúcio Vilela Resende
  • Guilherme Eurípedes Alves

DOI:

https://doi.org/10.25186/cs.v11i3.1092

Keywords:

NEFID, resistance inductor, CCRD, maltodextrin

Abstract

The coffee leaf extract formulation has been used as resistance inductor in plants and to control phytopathologies. This work aimed to study the influence of spray drying process variables with the use of maltodextrin as carrier on the characteristics of the powder, by using a central composite rotational design (CCRD). The independent variables were maltodextrin concentration (X1, 0 to 30 % w/v), coffee leaf extract concentration (X2, 2 to 32 % w/v), inlet air temperature (X3, 180 to 250 °C) and air flow rate (X4, 3.5 to 5.5 m3min-1). The response variables were collection efficiency (h), moisture content (MC), phenolic compounds content (Ph), soluble solids (S) content, wettability (We) and particle size (Me). The results showed that the combination of a higher concentrations of coffee leaf extract (X2) (32%) and lower inlet air temperatures (X3) (180°C) make the best drying performance. This process condition lead to a powder with higher Ph, S, We, Me and lower MC. Therefore, the use of high air flow rates (X4) increase the collection efficiency (h) of process and the use of low maltodextrin concentration (X1) lead to better preservation of phenolic compounds content (Ph) on coffee leaf extract powdered.

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Published

2016-07-15

How to Cite

CORRÊA, J. L. G.; DE MENDONÇA, K. S.; RODRIGUES, L. R.; RESENDE, M. L. V.; ALVES, G. E. Spray drying of coffee leaf extract. Coffee Science - ISSN 1984-3909, v. 11, n. 3, p. 358 - 366, 15 Jul. 2016.

Issue

Vol. 11 No. 3 (2016)

Section

Articles

Os direitos autorais dos artigos publicados nesta revista pertencem aos autores, com os primeiros direitos de publicação pertencentes à revista. Como os artigos aparecem nesta revista com acesso aberto, eles podem ser usados ​​livremente, com as devidas atribuições, em aplicativos educacionais e não comerciais.