The
performance
of
anaerobic
digestion
(AD)
is
susceptible
to
disturbances
in
feedstock
degradation,
intermediates
accumulation,
and
methanogenic
archaea
activity.
To
improve
the
methanogenesis
AD
system,
Fe-N
co-modified
biochar
was
prepared
under
different
pyrolysis
temperatures
(300,500,
700℃).
Meanwhile,
pristine
Fe-modified
were
also
derived
from
alternanthera
philoxeroides
(AP).
aim
compare
effects
co-modification,
Fe
modification,
on
explicit
responding
mechanism
microbial
community
AP
cow
manure
(CM).
highest
cumulative
methane
production
obtained
with
addition
Fe-N-BC500
(260.4
mL/gVS),
which
42
%
higher
than
control,
while
concentrations
acetic
acid,
propionic
butyric
acid
increased
by
148%,
44%,
194%
compared
respectively.
enhanced
abundance
Chloroflexi
Methanosarcina
system.
Metabolic
pathway
analysis
revealed
that
related
formation
metabolism
volatile
fatty
acids
biosynthesis
coenzyme
A
cell
activity
microorganisms,
accelerating
degradation
enhancing
hydrogenotrophic
pathway.
Overall,
proved
be
an
effective
promoter
for
accelerated
during
AD.
Heliyon,
Journal Year:
2024,
Volume and Issue:
10(3), P. e25787 - e25787
Published: Feb. 1, 2024
Sugarcane
leaf
waste,
a
byproduct
of
the
growing
global
sugar
industry,
challenges
agricultural
waste
management.
This
study
explores
its
potential
for
methane
production
via
anaerobic
digestion.
A
microbial
pre-hydrolysis,
using
lignocellulose-degrading
bacteria,
enhanced
soluble
chemical
oxygen
demand
at
an
optimal
initial
substrate
concentration
40
g-volatile
solid/L.
Comparative
analysis
with
untreated
and
bioaugmented
leaves
revealed
pre-hydrolyzed
achieved
highest
rate
(MPR)
14.0
±
0.5
mL-CH4/L·d,
surpassing
others
by
1.47
1.67
times.
Two
continuous
stirred
tank
reactors
were
employed
to
assess
hydraulic
retention
time
(HRT).
Results
showed
stable
HRT
25
days,
yielding
high
MPRs:
88.70
0.63
mL-CH4/L·d
from
sugarcane
82.57
1.22
consortium-augmented
leaves.
25-day
fosters
diversity
Bacteroidota,
Firmicutes,
Chloroflexi,
Verrucomicrobiota
dominance,
indicating
favorable
conditions.
Conversely,
20-day
results
in
lower
due
unfavorable
factors
like
low
pH
during
organic
overloading,
leading
increased
concentrations
volatile
fatty
acids
lactic
acid,
Firmicutes
as
predominant
phylum.
highlights
waste's
valuable
resource
sustainable
production.
Environmental Technology,
Journal Year:
2025,
Volume and Issue:
unknown, P. 1 - 13
Published: Feb. 11, 2025
Polylactic
acid
(PLA)
is
the
most
promising
bio-based
alternative
to
traditional
petrochemical
plastics
across
diverse
applications.
In
this
study,
biodegradation
performance
of
PLA
plastic
under
two
potential
end-of-life
scenarios:
mesophilic
and
thermophilic
anaerobic
digestion
(AD)
were
investigated.
The
biotic
abiotic
influence
factors
evaluated
through
short-time
exposure
experiments.
bacteria
archaea
involved
in
identified
by
high-throughput
16S
rRNA
sequencing
analysis.
results
showed
that
had
different
at
(the
biogas
yield:
36.70
±
0.2vs
398.6
1.1
mL/g
VS).
increased
temperature
conditions
improved
biodegradability
PLA,
but
an
attack
microorganisms
was
more
crucial
for
biodegradation.
engaged
hydrolysis
acidification
closely
associated
with
proteolytic
microbes.
Mesophilic
Clostridia
(14.94%),
Anaerolineae
(22.6%)
acetoclastic
Methanothrix
(53.0%).
Thermophilic
mainly
accomplished
syntrophic
microbes,
(38.2%),
Synergistia
(18.99%)
Thermotogae
(17.82%),
tandem
hydrogenotrophic
Methanothermobacter
(20.5%).
provide
some
insights
understanding
mechanisms
governing
AD
conditions.
Desalination and Water Treatment,
Journal Year:
2024,
Volume and Issue:
319, P. 100555 - 100555
Published: June 20, 2024
Propionate
production
and
consumption
are
influenced
by
thermodynamic
constraints,
microbial
competitions,
metabolic
inhibition.
Accumulation
of
propionate
in
wastewater
can
destabilize
anaerobic
digestion
lead
to
process
failure.
Anaerobic
is
one
the
viable
biological
methods
for
its
recovery
utilization.
Additives
have
been
shown
modulate
consumption,
effectively
influencing
overall
performance
digestion.
This
mini
review
systematically
examines
application
various
additives
their
effects
on:
(I)
(less
CH4
more
propionate)
(II)
degradation
CH4)
goals
studied
listed
recent
studies
on
most
used
classified
them
according
impact
concentration.
To
our
knowledge,
limited
research
has
conducted
role
recovery.
No
reviewed
from
or
potential
mitigate
inhibitory
effects.
enables
researchers
select
suitable
additive
recover
boost
mitigating
inhibition,
as
well
discussing
modern
bioreactors.
