TY - JOUR
T1 - A critical review of conventional and emerging methods for improving process stability in thermophilic anaerobic digestion
AU - Ryue, John
AU - Lin, Long
AU - Kakar, Farokh Laqa
AU - Elbeshbishy, Elsayed
AU - Al-Mamun, Abdullah
AU - Dhar, Bipro Ranjan
N1 - Publisher Copyright:
© 2019 International Energy Initiative
PY - 2020/2
Y1 - 2020/2
N2 - Anaerobic digestion has received significant attention in recent years due to dual benefits of waste diversion from landfill and bioenergy recovery. Among various temperature regimes, digesters operated under thermophilic (50–70 °C) condition has potential to provide several advantages over mesophilic (30–45 °C) and psychrophilic (<20 °C) conditions, which include faster degradation of organics and higher energy recovery. However, the operation of thermophilic digesters requires closer monitoring and control due to an additional risk of ammonia inhibition and irreversible acidification through the accumulation of volatile fatty acids. Conventional strategies to alleviate instabilities in thermophilic anaerobic digestion process have been focused primarily on the development of robust microbiome and co-digestion of complementary substrates. On the other hand, emerging strategies include the integration of digesters with microbial electrochemical systems and amendment of conductive additives. This review provides a critical overview of these strategies and summarizes research gaps to guide researchers and practitioners in the future research.
AB - Anaerobic digestion has received significant attention in recent years due to dual benefits of waste diversion from landfill and bioenergy recovery. Among various temperature regimes, digesters operated under thermophilic (50–70 °C) condition has potential to provide several advantages over mesophilic (30–45 °C) and psychrophilic (<20 °C) conditions, which include faster degradation of organics and higher energy recovery. However, the operation of thermophilic digesters requires closer monitoring and control due to an additional risk of ammonia inhibition and irreversible acidification through the accumulation of volatile fatty acids. Conventional strategies to alleviate instabilities in thermophilic anaerobic digestion process have been focused primarily on the development of robust microbiome and co-digestion of complementary substrates. On the other hand, emerging strategies include the integration of digesters with microbial electrochemical systems and amendment of conductive additives. This review provides a critical overview of these strategies and summarizes research gaps to guide researchers and practitioners in the future research.
KW - Acidification
KW - Ammonia inhibition
KW - Process stability
KW - Thermophilic anaerobic digestion
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U2 - 10.1016/j.esd.2019.11.001
DO - 10.1016/j.esd.2019.11.001
M3 - Review article
AN - SCOPUS:85075510301
SN - 0973-0826
VL - 54
SP - 72
EP - 84
JO - Energy for Sustainable Development
JF - Energy for Sustainable Development
ER -