TY - JOUR
T1 - Enhanced methane production in anaerobic digestion
T2 - A critical review on regulation based on electron transfer
AU - Xu, Xi-Jun
AU - Yan, Jin
AU - Yuan, Qing-Kang
AU - Wang, Xue-Ting
AU - Yuan, Yuan
AU - Ren, Nan-Qi
AU - Lee, Duu-Jong
AU - Chen, Chuan
PY - 2022/11
Y1 - 2022/11
N2 - Anaerobic digestion (AD) is a potential bioprocess for waste biomass utilization and energy conservation. Various iron/carbon-based CMs (e.g., magnetite, biochar, granular activated carbon (GAC), graphite and zero valent iron (ZVI)) have been supplemented in anaerobic digestors to improve AD performance. Generally, the supplementation of CMs has shown to improve methane production, shorten lag phase and alleviate environmental stress because they could serve as electron conduits and promote direct interspecies electron transfer (DIET). However, the CMs dosage varied greatly in previous studies and CMs wash out remains a challenge for its application in full-scale plants. Future work is recommended to standardize the CMs dosage and recover/reuse the CMs. Moreover, additional evidence is required to verify the electrotrophs involved in DIET.
AB - Anaerobic digestion (AD) is a potential bioprocess for waste biomass utilization and energy conservation. Various iron/carbon-based CMs (e.g., magnetite, biochar, granular activated carbon (GAC), graphite and zero valent iron (ZVI)) have been supplemented in anaerobic digestors to improve AD performance. Generally, the supplementation of CMs has shown to improve methane production, shorten lag phase and alleviate environmental stress because they could serve as electron conduits and promote direct interspecies electron transfer (DIET). However, the CMs dosage varied greatly in previous studies and CMs wash out remains a challenge for its application in full-scale plants. Future work is recommended to standardize the CMs dosage and recover/reuse the CMs. Moreover, additional evidence is required to verify the electrotrophs involved in DIET.
KW - Anaerobic digestion
KW - Conductive materials
KW - Direct interspecies electron transfer
KW - Electrotrophs
KW - Methane production
UR - http://www.scopus.com/inward/record.url?scp=85138796483&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85138796483&origin=recordpage
U2 - 10.1016/j.biortech.2022.128003
DO - 10.1016/j.biortech.2022.128003
M3 - RGC 21 - Publication in refereed journal
C2 - 36155810
SN - 0960-8524
VL - 364
JO - Bioresource Technology
JF - Bioresource Technology
M1 - 128003
ER -
