TY - JOUR
T1 - Kinetic studies of alkaline-pretreated corn stover co-digested with upset dairy manure under solid-state
AU - Ajayi-Banji, A. A.
AU - Sunoj, S.
AU - Igathinathane, C.
AU - Rahman, S.
N1 - Funding Information:
The authors gratefully acknowledge the funding from the Development Foundational Grant , North Dakota State University (NDSU), USA and support from NDSU Graduate School and Dean of College of Agriculture, Food Systems, and Natural Resources , NDSU, USA .
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2021/1
Y1 - 2021/1
N2 - Prolonged lag phase and reactor instability make methane yield description and prediction challenging in upset solid-state anaerobic digestion (SSAD). Seven kinetic models (first-order (FOM), modified first-order (MFOM), Fitzhugh (FzM), logistic (LM), modified logistic (MLM), Cone (CM), and modified Gompertz (MGM) were employed for treatment evaluation. The treatments were dairy manure blended with calcium pretreated stover (8% Ca CSDM) or sodium pretreated corn stover (4% Na CSDM) or 2% aqueous ammonia pretreated corn stover (2% NH4 CSDM), or 4% aqueous ammonia pretreated corn stover (4% NH4 CSDM). The LM, CM, MLM with MGM, and MGM best described methane yield for 4% Na CSDM, 2% NH4 CSDM, 4% NH4 CSDM, and 8% Ca CSDM, respectively. Optimal hydraulic retention time predicted for the least inhibited treatment, 8% Ca CSDM, was 60 days. Therefore, non-hydrolysis rate limiting models (LM, MLM, FzM, MGM, and CM) could simulate methane yield, design of reactor's volume, and develop degradation rate models in full-scale SSAD.
AB - Prolonged lag phase and reactor instability make methane yield description and prediction challenging in upset solid-state anaerobic digestion (SSAD). Seven kinetic models (first-order (FOM), modified first-order (MFOM), Fitzhugh (FzM), logistic (LM), modified logistic (MLM), Cone (CM), and modified Gompertz (MGM) were employed for treatment evaluation. The treatments were dairy manure blended with calcium pretreated stover (8% Ca CSDM) or sodium pretreated corn stover (4% Na CSDM) or 2% aqueous ammonia pretreated corn stover (2% NH4 CSDM), or 4% aqueous ammonia pretreated corn stover (4% NH4 CSDM). The LM, CM, MLM with MGM, and MGM best described methane yield for 4% Na CSDM, 2% NH4 CSDM, 4% NH4 CSDM, and 8% Ca CSDM, respectively. Optimal hydraulic retention time predicted for the least inhibited treatment, 8% Ca CSDM, was 60 days. Therefore, non-hydrolysis rate limiting models (LM, MLM, FzM, MGM, and CM) could simulate methane yield, design of reactor's volume, and develop degradation rate models in full-scale SSAD.
KW - Kinetic model
KW - Methane yield
KW - Retention time
KW - Solid-state anaerobic digestion
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U2 - 10.1016/j.renene.2020.10.110
DO - 10.1016/j.renene.2020.10.110
M3 - Article
AN - SCOPUS:85095435557
SN - 0960-1481
VL - 163
SP - 2198
EP - 2207
JO - Renewable Energy
JF - Renewable Energy
ER -