TY - JOUR
T1 - Influence of substrate concentration and bicarbonate addition on the anaerobic digestion of an inulin-rich substrate as the ending stage in a dandelion biorefinery scheme
AU - Martínez, María
AU - Ramos, Carlos
AU - POIRRIER GONZALEZ, PAOLA
AU - CHAMY MAGGI, ROLANDO ARTURO
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/11
Y1 - 2020/11
N2 - This study was focused on the suitability of dandelion plant as part of a biorefinery scheme in which anaerobic degradation (biomethanization) for biogas production is the ending process. Inulin, as the main compound in the tuberous root of dandelion, was selected as substrate and tested at different concentrations (5, 10 and 15 g TS L−1). The presence of bicarbonate as a buffer on anaerobic digestion was assessed as well. Methane production curves were fitted with the modified Gompertz equation. Methane production yield (YCH4), specific maximum methane production rate (SRMAX) and the first-order hydrolysis constant (kH) were affected by the substrate concentration. Bicarbonate was found not to be determinant for the overall biomethanization process because no significant effect over the YCH4 was achieved in the presence or absence of bicarbonate; between 0.19 to 0.23 m3 kg-1 VS added. However, kH and SRMAX were affected by the presence of this inorganic compound. Without the addition of bicarbonate, kH and SRMAX decreased as the TS increased. These results will be key for a dandelion biorefinery proof-of-concept under the proposed conditions.
AB - This study was focused on the suitability of dandelion plant as part of a biorefinery scheme in which anaerobic degradation (biomethanization) for biogas production is the ending process. Inulin, as the main compound in the tuberous root of dandelion, was selected as substrate and tested at different concentrations (5, 10 and 15 g TS L−1). The presence of bicarbonate as a buffer on anaerobic digestion was assessed as well. Methane production curves were fitted with the modified Gompertz equation. Methane production yield (YCH4), specific maximum methane production rate (SRMAX) and the first-order hydrolysis constant (kH) were affected by the substrate concentration. Bicarbonate was found not to be determinant for the overall biomethanization process because no significant effect over the YCH4 was achieved in the presence or absence of bicarbonate; between 0.19 to 0.23 m3 kg-1 VS added. However, kH and SRMAX were affected by the presence of this inorganic compound. Without the addition of bicarbonate, kH and SRMAX decreased as the TS increased. These results will be key for a dandelion biorefinery proof-of-concept under the proposed conditions.
KW - Bicarbonate
KW - Biomethanization
KW - Dandelion
KW - Inulin
KW - Methane
UR - http://www.scopus.com/inward/record.url?scp=85089799442&partnerID=8YFLogxK
U2 - 10.1016/j.procbio.2020.07.001
DO - 10.1016/j.procbio.2020.07.001
M3 - Article
AN - SCOPUS:85089799442
VL - 98
SP - 211
EP - 216
JO - Process Biochemistry
JF - Process Biochemistry
SN - 1359-5113
ER -