AD	Aanaerobic digestion
AeMBR	Aerobic membrane bioreactor
AFBR	Anaerobic fluidized-bed reactor
AnMBR	Anaerobic membrane bioreactor
ASBR	Anaerobic Sequencing Batch Reactor
ATP	Adenosine triphosphate
CIGSB	Carrier-induced granular sludge bed reactor
CNT	Carbon nanotubes
COD	Chemical oxygen demand
CSTR	Continuous stirred tank reactor
EPS	Extracellular polymeric substances
FBBAC	Fixed bed bioreactor with activated carbon
FBR	Fixed bed reactor
FHL	Formate hydrogenlyase
FS	Flat sheet
GO	Graphene oxide
HF	Hollow fiber
HRT	High retention time
ICSTR	Intermittent continuous stirred tank reactor
LBR	Leaching bed reactor
MBR	Membrane bioreactor
MF	Microfiltration
MFC	Microbial fuel cells
MLSS	Mixed liquor suspended solid
MT	Multi tubular
NADH	Nicotinamide adenine dinucleotide
NF	Nanofiltration
OLR	Organic loading rate
PE	Polyethylene
PES	Polyethersulfone
PFL	Pyruvate formate lyase
PFOR	Pyruvate ferredoxin oxido reductase
PNS	Photosynthetic non-sulfur
PP	Polypropylene
PS	Polysulfone
PVDF	Polyvinylidene difluoride
SMP	Soluble microbial products
SRT	Solid retention time
TCA	Tricarboxylic acid cycle
ThAeMBR	Thermophilic aerobic membrane bioreactor
ThAnMBR	Thermophilic anaerobic membrane bioreactor
TMP	Transmembrane pressure
UASB	Up-flow Anaerobic Sludge Blanket
UF	Ultrafiltration
VFA	Volatil fatty acid