Production of biogas (methane and hydrogen) from anaerobic digestion of hemicellulosic hydrolysate generated in the oxidative pretreatment of coffee husks.
In: Bioresource Technology, Jg. 263 (2018-09-01), S. 601-612
academicJournal
Zugriff:
Ozone pretreatment of coffee husks (CH) was evaluated to generate hydrolysates for biogas production and to preserve cellulose of the solid phase for 2G ethanol production. Pretreatment variables included liquid-to-solid ratio ( LSR ), pH and specific applied ozone load ( SAOL ). Considering single-stage anaerobic digestion (AD), the highest methane production (36 NmL CH 4 /g CH) was achieved with the hydrolysate generated in the experiment using LSR 10 mL/g, pH 11 and SAOL 18.5 mg O 3 /g CH, leading to 0.064 kJ/g CH energy recovery. Due to the presence of toxic compounds in the hydrolysate, the addition of powdered activated carbon (4 g/L) to the reactor enhanced biogas production, leading to 86 NmL CH 4 /g CH yield and 0.58 kJ/g CH energy recovery. When two-stage AD was applied, methane production resulted in 49 NmL CH 4 /g CH, with additional 19 NmL H 2 /g CH production, resulting in a net 0.26 kJ/g CH energy recovery. [ABSTRACT FROM AUTHOR]
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Production of biogas (methane and hydrogen) from anaerobic digestion of hemicellulosic hydrolysate generated in the oxidative pretreatment of coffee husks.
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Autor/in / Beteiligte Person: | Santos, Lívia Caroline dos ; Adarme, Oscar Fernando Herrera ; Baêta, Bruno Eduardo Lobo ; Gurgel, Leandro Vinícius Alves ; Aquino, Sérgio Francisco de |
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Zeitschrift: | Bioresource Technology, Jg. 263 (2018-09-01), S. 601-612 |
Veröffentlichung: | 2018 |
Medientyp: | academicJournal |
ISSN: | 0960-8524 (print) |
DOI: | 10.1016/j.biortech.2018.05.037 |
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