TY - JOUR
T1 - Comprehensive evaluation of different strategies to recover methanogenic performance in ammonia-stressed reactors
AU - Yan, Miao
AU - Zhu, Xinyu
AU - Treu, Laura
AU - Ravenni, Giulia
AU - Campanaro, Stefano
AU - Goonesekera, Estelle Maria
AU - Ferrigno, Rosa
AU - Jacobsen, Carsten S.
AU - Zervas, Athanasios
AU - Angelidaki, Irini
AU - Fotidis, Ioannis A.
PY - 2021
Y1 - 2021
N2 - In this study, strategies for recovery of ammonia-stressed AD reactors were attempted, by addition of preserved bioaugmentation consortium in gel (BioG), fresh consortium in liquid medium (BioL), woodchip biochar (BW), and straw biochar (BS). In comparison to control group with ammonia, effective treatments, i.e., BioG, BioL, BW and BS raised the maximum methane production rate by 77%, 23%, 35%, and 24%, respectively. BW possibly acted as interspecies electrical conduits for Direct Electron Transfer based on conductivity and SEM analysis. BioG facilitated slow release of bioaugmentation inocula from gel into the AD system, which protected them from a direct environmental shock. According to microbial analysis, both BioG, BioL and BW resulted in increased relative abundance of Methanothermobacter thermautotrophicus; and BS induced selective raise of Methanosarcina thermophila. The increase of methanogens via these strategies led to the faster recovery of the AD process.
AB - In this study, strategies for recovery of ammonia-stressed AD reactors were attempted, by addition of preserved bioaugmentation consortium in gel (BioG), fresh consortium in liquid medium (BioL), woodchip biochar (BW), and straw biochar (BS). In comparison to control group with ammonia, effective treatments, i.e., BioG, BioL, BW and BS raised the maximum methane production rate by 77%, 23%, 35%, and 24%, respectively. BW possibly acted as interspecies electrical conduits for Direct Electron Transfer based on conductivity and SEM analysis. BioG facilitated slow release of bioaugmentation inocula from gel into the AD system, which protected them from a direct environmental shock. According to microbial analysis, both BioG, BioL and BW resulted in increased relative abundance of Methanothermobacter thermautotrophicus; and BS induced selective raise of Methanosarcina thermophila. The increase of methanogens via these strategies led to the faster recovery of the AD process.
KW - Bioaugmentation
KW - Biochar
KW - Ammonia Inhibition
KW - Anaerobic Digestion
KW - Selective Enrichment
U2 - 10.1016/j.biortech.2021.125329
DO - 10.1016/j.biortech.2021.125329
M3 - Journal article
C2 - 34052546
SN - 0960-8524
VL - 336
JO - Bioresource Technology
JF - Bioresource Technology
M1 - 125329
ER -