Environmental Science & Technology,
Journal Year:
2024,
Volume and Issue:
58(22), P. 9792 - 9803
Published: May 23, 2024
Anaerobic
fermentation
is
a
crucial
route
to
realize
effective
waste
activated
sludge
(WAS)
resource
recovery
and
utilization,
while
the
overall
efficiency
commonly
restrained
by
undesirable
disruptors
(i.e.,
chemical
dewatering
agents).
This
work
unveiled
unexpectedly
positive
effects
of
biodewatering
tannic
acid
(TA)
on
volatile
fatty
acids
(VFAs)
biosynthesis
during
WAS
anaerobic
fermentation.
The
total
VFAs
yield
was
remarkably
increased
15.6
folds
with
enriched
acetate
butyrate
in
TA-occurred
systems.
TA
capable
disintegrate
extracellular
polymeric
substances
promote
organics
release.
However,
further
modulated
soluble
proteins
structure
hydrogen
bonding
hydrophobic
interactions,
resulting
decrease
bioavailability
consequential
alteration
metabolic
substrate
feature.
These
changes
reshaped
microbial
community
stimulated
adaptive
regulatory
systems
hydrolytic–acidogenic
bacteria.
keystone
species
for
carbohydrate
metabolism
Solobacterium
Erysipelotrichaceae)
were
preferentially
enriched.
Also,
typical
quorum
sensing
enhancing
transport)
two-component
sustaining
high
activity)
networks
connectivity
ecological
cooperative
behaviors
response
stress.
Additionally,
functions
responsible
hydrolysis,
transmembrane
transport,
intracellular
as
well
VFA
showed
relative
abundance,
which
maintained
activities
biosynthesis.
study
underscored
advantages
treatment
context
deciphered
interactive
mechanisms.
