AD	Anaerobic Digestion
BCCU	Biological Carbon Capture and Utilization
C/N	Carbon to Nitrogen Ratio
CA-MFC	Cascade Microbial Fuel Cell
CO2	Carbon Dioxide
CNTs	Carbon Nanotubes
COD	Chemical Oxygen Demand
FAME	Fatty Acid Methyl Ester
GHGs	Greenhouse Gases
HTL	Hydrothermal Liquefaction
MFCs	Microbial Fuel Cells
PBR	Photobioreactor
PMFCs	Photosynthetic Microbial Fuel Cells
RSM	Response Surface Methodology
SSF	Simultaneous Saccharification and Fermentation
SAFs	Sustainable aviation fuels
MFSP	Minimum fuel selling price
EROI	Energy return on investment
DIET	Direct interspecies electron transfer
TRL	Technology readiness level
ORR	Oxygen reduction reaction
GO	Graphene oxide
ROS	Reactive oxygen species
TEA	Techno-economic analysis
LCA	Life-cycle assessment