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Title: Anaerobic co-digestion of coffee husks and microalgal biomass after thermal hydrolysis.
Authors: Passos, Fabiana
Cordeiro, Paulo Henrique de Miranda
Baeta, Bruno Eduardo Lobo
Aquino, Sergio Francisco de
Elvira, Sara Isabel Perez
Keywords: Anaerobic co-digestion
Lignocellulosic biomass
Issue Date: 2018
Citation: PASSOS, F. et al. Anaerobic co-digestion of coffee husks and microalgal biomass after thermal hydrolysis. Bioresource Technology, v. 253, p. 49-54, 2018. Disponível em: <>. Acesso em: 05 abr. 2018.
Abstract: Residual coffee husks after seed processing may be better profited if bioconverted into energy through anaerobic digestion. This process may be improved by implementing a pretreatment step and by co-digesting the coffee husks with a more liquid biomass. In this context, this study aimed at evaluating the anaerobic co-digestion of coffee husks with microalgal biomass. For this, both substrates were pretreated separately and in a mixture for attaining 15% of total solids (TS), which was demonstrated to be the minimum solid content for pretreatment of coffee husks. The results showed that the anaerobic co-digestion presented a synergistic effect, leading to 17% higher methane yield compared to the theoretical value of both substrates biodegraded separately. Furthermore, thermal hydrolysis pretreatment increased coffee husks anaerobic biodegradability. For co-digestion trials, the highest values were reached for pretreatment at 120 °C for 60 min, which led to 196 mLCH4/gVS and maximum methane production rate of 0.38 d−1.
ISSN: 09608524
Appears in Collections:DEQUI - Artigos publicados em periódicos

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