Medina-Quintana, Mónica M.

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Degradation of caffeine in coffee pulp by solid-state fermentation
(2015) Medina-Quintana, Mónica M.; Ortiz-Bermúdez, Patricia; College of Engineering; Hwang, Sangchul; Zapata López, Raúl E.; Department of Civil Engineering; Chávez Jáuregui, Rosa
Coffee pulp is the most abundant solid waste in coffee processing plants. Its reutilization could be a challenge due to the presence of compounds such as caffeine. In the current study the solid-state fermentation was performed as a method to reduce caffeine present in coffee pulp. An optimization of the fermentation is proposed based on a parametric study, in which a caffeine degradation of about 53.5% was achieved on unground coffee pulp and 80% humidity content. Also, a preliminary study for the scaling-up of the process was performed. A compositional and structural study of the pulp before and after degradation was made to identify changes on the pulp and determine future uses of it, such as animal feed.