Microplastics
(MPs)
transferred
to
sludge
during
water
treatment
processes,
particularly
wastewater
treatment,
enter
anaerobic
digesters
through
prior
its
final
disposal
or
reuse.
MPs
retained
in
digested
confirm
the
presence
of
digestion.
The
abundance
varies
considerably
from
0.02
MPs/g
DW
169,000
sludge.
MPs'
variability
is
partly
attributed
influent
quality
and
capacity
a
plant.
Fibrous
are
most
common
detected.
usually
have
sizes
less
than
1
mm.
Common
retrieved
those
acrylic,
polyamide,
polyethylene,
polyester,
polyethylene
terephthalate.
In
digesters,
could
interact
with
organic
matter
causing
increased
solubilization,
which
leads
higher
formation
volatile
fatty
acids.
Contrarily,
they
impede
digestion
matter.
They
emerging
pollutants
reduce
their
negative
impacts
on
adsorption
MPs.
change
microbial
profiles
favoring
some
microbes
while
inhibiting
others.
Polyamide
monomers
were
found
promote
growth
certain
microbes,
biogas
production.
Inhibitory
effects
often
due
leaching
chemicals,
bisphenol
A,
undergo
morphological
chemical
changes
digesters.
thinner
surfaces
at
sites
cleavages
after
Their
reduces
digestion,
implying
potential
degradation
biodegradation.
This
makes
prospective
avenue
for
MP
removal
bioaugmentation
pretreatment.
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.
Processes,
Journal Year:
2023,
Volume and Issue:
11(8), P. 2467 - 2467
Published: Aug. 16, 2023
High
pressure
homogenization
(HPH)
pretreatment
can
improve
sludge
anaerobic
digestion;
however,
the
relationship
among
material,
energy
conversion,
and
gas
production
efficiency
was
unclear
under
different
operating
conditions
in
digestion
by
HPH
pretreatment.
In
this
study,
performance
of
before
investigated,
explored.
induced
organic
solubilization,
a
maximum
soluble
chemical
oxygen
demand
(SCOD)/total
(TCOD)
about
30%
achieved.
Results
showed
that
significantly
improved
biogas
increase
CH4
yield
57%;
period
shortened
10
days.
The
ratio
increment
to
volatile
dissolved
solids
(VDS)
0.21
mL/mg.
1
L/g
solid
(VS)
required
specific
0.10
MJ/kg
total
(TS)
increasing
with
one
cycle
0.72
TS
at
60
MPa.
minimum
additive
consumption
125
J/mL
20
MPa
cycle.
Considering
improvement
conservation,
should
maintain
no
more
than
This
study
provides
theoretical
reference
for
practical
application
digestion.
holds
promise
as
potential
strategy
sewage
produce
