This
study
was
based
on
an
industrial
sludge
landfill
with
a
scale
of
1
million
cubic
meters,
which
had
been
filled
for
more
than
10
years.
It
focused
the
secondary
dewatering
(LS)
organic
carbon
content
(TOC)
greater
50%
and
VSS/SS
ratio
0.59.
A
Response
Surface
Methodology
(RSM)
model
established
using
coagulant
ferrous
sulfate
(FeSO4)
conditioning
agents
such
as
hydrated
MgO,
blast
furnace
slag
(BFS),
CaO.
By
solving
RSM
equations
respective
indicators,
optimal
dosages
FeSO4,
BFS
were
determined
to
be
90
mg/g
DS,
CaO
174.875
DS.
Further
examinations
performance,
apparent
properties,
EPS
components,
rheological
characteristics,
moisture
distribution,
pollutant
variation
led
development
green
waste-based
agent
composed
FeSO4
BFS.
In
small-scale
plate
frame
tests,
69.11%,
in
final
production-scale
experiments,
it
65.72%,
actual
application
cost
being
only
$13
per
ton
dry
solids.
Additionally,
when
used
together,
combined
action
Fe
Si
could
reduce
biotoxicity
heavy
metals,
cut
down
75.2%
sludge's
TOC,
effectively
leaching
substances
from
leachate,
beneficial
subsequent
disposal.
conclusion,
use
economically
efficient,
effective
dewatering,
significant
harm
reduction
effects,
making
viable
waste
treatment
solution
Environmental Science & Technology,
Journal Year:
2024,
Volume and Issue:
58(26), P. 11542 - 11553
Published: June 13, 2024
Nanoplastics
(NPs)
are
emerging
pollutants
and
have
been
reported
to
cause
the
disintegration
of
anaerobic
granular
sludge
(AnGS).
However,
mechanism
involved
in
AnGS
was
not
clear.
In
this
study,
polyvinyl
chloride
nanoplastics
(PVC-NPs)
were
chosen
as
target
NPs
their
long-term
impact
on
structure
investigated.
Results
showed
that
increasing
PVC-NPs
concentration
resulted
inhibition
acetoclastic
methanogens,
syntrophic
propionate,
butyrate
degradation,
well
disintegration.
At
presence
50
μg·L
Results in Engineering,
Journal Year:
2024,
Volume and Issue:
23, P. 102426 - 102426
Published: June 15, 2024
The
high
demand
for
drinking
water
has
increased
waste
from
treatment
plants,
notably
during
coagulation-flocculation,
leading
to
substantial
sludges'
accumulation.
This
study
aims
focus
on
the
characterization
of
sludge
(DWTS)
batches
three
last
years
and
statically
studying
it's
uniformity,
as
exploring
potential
repurposing
options.
samples
were
characterized
using
X-Ray
Fluorescence
(XRF),
Diffraction
(XRD),
Fourier
Transform
Infrared
Spectroscopy
(FTIR),
Thermogravimetric
Analysis
(TGA),
Inductively
Coupled
Plasma
Optical
Emission
(ICP-OES),
Loss
On
Ignition
(LOI),
Granulometric
analysis.
results
evinced
that
DWTS
have
a
sandy
nature,
organic
fraction
takes
third
DWTS'
chemical
composition,
amount
Al2O3
+
SiO2
Fe2O3
is
slightly
different,
with
55.84,
57.47,
56.14%
DWTS21,
DWTS22,
DWTS23
respectively,
slight
per
ANOVA
results,
which
exhibited
consistency
composition
among
samples,
providing
valuable
insights
into
DWTS,
contributing
sustainable
environmentally
friendly
practices
in
construction
industry
especially
presents
higher
content
CaO
2.95%.
