Coffee Husk Waste Valorization Using Thermal Pretreatment Associated to Bioprocess to Produce Bioproducts: Characterization, Kinetic, Economic Assessment, and Challenges

Silva, Nayara Clarisse Soares; Fonseca, Yasmim Arantes da; Paranhos, António; Adarme, Oscar Fernando Herrera; Aquino, Samuel; Gurgel, Leandro Vinícius Alves; Rincón, Juan Daniel Valderrama; Wandurraga, Héctor Javier Luna; Baêta, Bruno Eduardo Lôbo

doi:10.1201/9781003128977-9

Cited by 1 publication

(2 citation statements)

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“…In the C1-35°C test, the temperature was maintained at 35°C, whereas in the C2-20°C and C3-20°C-w/pretreatment tests, the temperature was regulated at 20°C. In C3-20°C-w/pretreatment test, coffee husk was exposed to a thermochemical pretreatment (120°C, 0.5% HCl (v/v), 30 minute of exposition time) prior to the BMP assay [25,26].…”

Section: Bmp Testsmentioning

confidence: 99%

“…However, mesophilic operation does not outperform that of psychrophilic operation with pretreated CH, this exceptional outcome can be ascribed to the availability of cellulose, hemicellulose, and fermentable substances that become readily accessible to microorganisms when a feedstock is pretreated [37,39,40]. According to [25], this breakdown includes the deacetylation of hemicelluloses, which could lead to an elevation in acetic acid concentration within the reactive mixture, promoting the hydrolysis and deriving in higher biogas production consequently [25,37,39,40].…”

Section: Changes In Biogas and Methane Productivitymentioning

confidence: 99%

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Thermochemical Pretreatment for Improving the Psychrophilic Anaerobic Digestion of Coffee Husks

Yang,

Flores-Rodriguez,

Torres-Albarracin

et al. 2023

Preprint

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Psychrophilic anaerobic digestion emerges as an appealing integrated solution for the management of agricultural waste, particularly for farmers in regions where the average temperature does not exceed 26°C, as seen in coffee cultivation. Therefore, this study seeks to assess the biomethane potential of thermochemical treated coffee husk through psychrophilic anaerobic digestion (C3-20°C-w/pretreatment). To examine its viability, outcomes were compared with reactors operating at both mesophilic (C1-35°C) and psychrophilic (C2-20°C) conditions, albeit without the use of pretreated coffee husk. The C3-20°C-w/pretreatment test demonstrated a 36.89% increase (150.47 mL CH4/g VS; 161.04 mL CH4/g COD), while the C1-35°C test exhibited a 24.03% increase (124.99 mL CH4/g VS; 133.77 mL CH4/g COD), both in comparison to the C2-20°C test (94.96 mL CH4/g VS; 101.63 mL CH4/g COD). Notably, the C3-20°C-w/pretreatment trial yielded superior outcomes, accompanied by an associated energy output of 4262.2 KWh/year, sufficient to meet the annual energy demands of 588 residences. This marks an increase of 100 and 217 residences compared to mesophilic and psychrophilic AD of CH without pretreatment, respectively.

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Section: Bmp Testsmentioning

confidence: 99%