CHEMICAL COMPOSITION OF UNRIPE ARABIC COFFEE (Coffea arabica L.) PROCESSED UNDER DRY AND WET CONDITIONS

Authors

  • Gilberto Westin Nobre Universidade Federal de Lavras
  • Flávio Meira Borém DEG-UFLA
  • Eder Pedroza Isquierdo DCA-UFLA
  • Rosemary Gualberto F. A. Pereira DCA-UFLA
  • Pedro Damasceno de Oliveira DEG-UFLA

Keywords:

Peeled unripe, quality, processing

Abstract

This study was conducted in order to characterize the chemical composition and evaluate the quality of unripe coffeebeans, processed under dry and wet conditions, submitted to different periods of rest before peeling, with and without water. The coffeewas harvested, separated according to density and peeled. The experiment was conducted in a completely randomized design (CRD)with five repetitions and arranged in a factorial 3 x 2 x 2 (3 rest periods - 12, 24 and 48 hours, two types of processing - dry (naturalgreen) and wet (peeled green ); two rest conditions - presence and absence of water). Three additional treatments were also studied:control sample – unripe fruit produced during cherry peeling, natural unripe fruit (coffee that is not peeled) and peeled unripe fruit,processed immediately after harvest. The coffee was dried in thin layers on a concrete yard and turned every 30 minutes, and afterreaching a water content level of 30% (wb) was piled to complete drying. To evaluate quality, the following analysis were carried out:total sugars, reducing and not reducing, total acidity, soluble solids, potassium leaching, electrical conductivity and chlorogenic acids.It was observed that peeling of unripe fruits increases the physiological and chemical indicators of quality of unripe coffee and can beperformed immediately after peeling the ripe fruits, with no harm to quality. The use of water during the rest period of green fruit doesnot contribute to maintaining the quality of coffee, which can be dispensed when processing the green coffee

Published

2012-01-25

How to Cite

WESTIN NOBRE, G.; MEIRA BORÉM, F.; PEDROZA ISQUIERDO, E.; GUALBERTO F. A. PEREIRA, R.; DAMASCENO DE OLIVEIRA, P. CHEMICAL COMPOSITION OF UNRIPE ARABIC COFFEE (Coffea arabica L.) PROCESSED UNDER DRY AND WET CONDITIONS. Coffee Science - ISSN 1984-3909, [S. l.], v. 6, n. 2, p. 107–113, 2012. Disponível em: http://www.coffeescience.ufla.br/index.php/Coffeescience/article/view/406. Acesso em: 30 sep. 2022.

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