TY - JOUR
T1 - Biomethane production from Arachis hypogea shells
T2 - effect of thermal pretreatment on substrate structure and yield
AU - Olatunji, Kehinde O.
AU - Madyira, Daniel M.
AU - Ahmed, Noor A.
AU - Ogunkunle, Oyetola
N1 - Publisher Copyright:
© The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2022.
PY - 2024/3
Y1 - 2024/3
N2 - The complex lignocellulosic arrangement of Arachis hypogea shells is the major hindrance during its anaerobic digestion process. This work emphasizes the application of thermal pretreatment on Arachis hypogea shells before anaerobic digestion. Different temperatures of 90, 100, 110, and 120 °C, with 30 and 60 min duration were applied to the substrate and digested in a batch digester for 30 days at mesophilic temperature. The physicochemical characteristics of untreated and treated substrates were examined with scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). SEM analysis showed an improved porosity of Arachis hypogea shells with increased temperature and time. XRD investigation showed a reduction in the value of the crystalline index and supported the breakdown of the crystalline matrix. FTIR analysis depicted the elimination of hemicellulose and lignin. Biomethane yield from the anaerobic digestion of Arachis hypogea shells was increased by 23.96% at 100 °C for 30 min. The treatment above this temperature and time decreased biomethane yield to between 16 and 44%. It can be inferred from this work that conventional thermal pretreatment at 100 °C for 30 min released the optimum biomethane yield. Therefore, thermal pretreatment improves biomethane yield efficiently during anaerobic digestion of Arachis hypogea shells and can be replicated commercially.
AB - The complex lignocellulosic arrangement of Arachis hypogea shells is the major hindrance during its anaerobic digestion process. This work emphasizes the application of thermal pretreatment on Arachis hypogea shells before anaerobic digestion. Different temperatures of 90, 100, 110, and 120 °C, with 30 and 60 min duration were applied to the substrate and digested in a batch digester for 30 days at mesophilic temperature. The physicochemical characteristics of untreated and treated substrates were examined with scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). SEM analysis showed an improved porosity of Arachis hypogea shells with increased temperature and time. XRD investigation showed a reduction in the value of the crystalline index and supported the breakdown of the crystalline matrix. FTIR analysis depicted the elimination of hemicellulose and lignin. Biomethane yield from the anaerobic digestion of Arachis hypogea shells was increased by 23.96% at 100 °C for 30 min. The treatment above this temperature and time decreased biomethane yield to between 16 and 44%. It can be inferred from this work that conventional thermal pretreatment at 100 °C for 30 min released the optimum biomethane yield. Therefore, thermal pretreatment improves biomethane yield efficiently during anaerobic digestion of Arachis hypogea shells and can be replicated commercially.
KW - Anaerobic digestion
KW - Arachis hypogea shells
KW - Biomethane yield
KW - Lignocellulose material
KW - Pretreatment
KW - Thermal
UR - http://www.scopus.com/inward/record.url?scp=85129522756&partnerID=8YFLogxK
U2 - 10.1007/s13399-022-02731-7
DO - 10.1007/s13399-022-02731-7
M3 - Article
AN - SCOPUS:85129522756
SN - 2190-6815
VL - 14
SP - 6925
EP - 6938
JO - Biomass Conversion and Biorefinery
JF - Biomass Conversion and Biorefinery
IS - 5
ER -