TY - JOUR
T1 - Potential of biogas residue biochar modified by ferric chloride for the enhancement of anaerobic digestion of food waste
AU - Li, Xunan
AU - Chu, Siqin
AU - Wang, Panliang
AU - Li, Kaiyi
AU - Su, Yinglong
AU - Wu, Dong
AU - Xie, Bing
N1 - Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/9
Y1 - 2022/9
N2 - Biogas residue biochar (BRB) and BRB modified by ferric chloride (BRB-FeCl3) were applied to promote anaerobic digestion (AD) of food waste (FW), related mechanisms were also proposed in this study. Results indicated BRB-FeCl3 showed higher specific surface area, more abundant functional groups and impregnate iron than BRB, and they respectively increased 22.50% and 12.79% cumulative methane yields compared with control group because of accelerated volatile fatty acids (VFAs) transformation, which were confirmed by enhanced metabolism of glycolysis, fatty acid degradation and pyruvate. BRB, especially BRB-FeCl3 facilitated the growth of Syntrophomonas, Methanofollis, Methanoculleus and Methanosarcina, which further promoted the methanogenesis by enhancing the metabolic activities of methanol, dimethylamine and methylamine pathways, thereby causing more metabolically diverse methanogenic pathways. Metagenomics analysis revealed BRB, especially BRB-FeCl3 promoted the relative abundances of functional genes involved in direct interspecies electron transfer (DIET). Present study explored the enhancement mechanisms and feasibility of BRB-FeCl3 for AD process.
AB - Biogas residue biochar (BRB) and BRB modified by ferric chloride (BRB-FeCl3) were applied to promote anaerobic digestion (AD) of food waste (FW), related mechanisms were also proposed in this study. Results indicated BRB-FeCl3 showed higher specific surface area, more abundant functional groups and impregnate iron than BRB, and they respectively increased 22.50% and 12.79% cumulative methane yields compared with control group because of accelerated volatile fatty acids (VFAs) transformation, which were confirmed by enhanced metabolism of glycolysis, fatty acid degradation and pyruvate. BRB, especially BRB-FeCl3 facilitated the growth of Syntrophomonas, Methanofollis, Methanoculleus and Methanosarcina, which further promoted the methanogenesis by enhancing the metabolic activities of methanol, dimethylamine and methylamine pathways, thereby causing more metabolically diverse methanogenic pathways. Metagenomics analysis revealed BRB, especially BRB-FeCl3 promoted the relative abundances of functional genes involved in direct interspecies electron transfer (DIET). Present study explored the enhancement mechanisms and feasibility of BRB-FeCl3 for AD process.
KW - Direct interspecies electron transfer
KW - FeCl modification
KW - Metagenomics
KW - Methanogenic pathways
KW - Microbial community
UR - https://www.scopus.com/pages/publications/85133403012
U2 - 10.1016/j.biortech.2022.127530
DO - 10.1016/j.biortech.2022.127530
M3 - 文章
C2 - 35772715
AN - SCOPUS:85133403012
SN - 0960-8524
VL - 360
JO - Bioresource Technology
JF - Bioresource Technology
M1 - 127530
ER -
