Bioremediation Journal,
Journal Year:
2023,
Volume and Issue:
28(4), P. 564 - 578
Published: Dec. 12, 2023
Sewage
sludge
is
a
by-product
of
municipal
wastewater
treatment,
and
its
production
increasing
with
population
growth
urbanization.
Hydrothermal
carbonization
(HTC)
promising
method
for
managing
sewage
due
to
applicability
cost-effectiveness.
The
HTC
process
produces
hydrochar,
stabilized
carbon
material
derived
from
sludge.
In
this
study,
was
subjected
at
optimized
conditions
200
°C
6
h
using
the
response
surface
methodology
(RSM)
statistical
tool.
structural
morphology
hydrochar
analyzed
Scanning
Electron
Microscopy
Transmission
Microscopy,
which
revealed
fluffy
coarse
deeper
fragments,
indicating
presence
microspheres.
Fourier
Transform
Infrared
(FTIR)
spectra
showed
that
retained
similar
functional
groups
as
original
sludge,
such
hydroxyl,
aliphatic
methyl,
amino,
ketonic,
amide,
ether
groups,
minimal
shifts
reductions
in
vibrational
peaks.
RSC Advances,
Journal Year:
2024,
Volume and Issue:
14(25), P. 17326 - 17337
Published: Jan. 1, 2024
In
this
work,
polyethylene
terephthalate
(PET)
and
sewage
sludge
(SS)
were
co-hydrothermally
carbonized
to
produce
low-nitrogen
solid
fuels.
To
minimize
the
effect
of
nitrogen,
work
introduces
a
co-hydrothermal
carbonization
method
involving
alkali
(A),
ultrasonic
cell
disruptor
(UCC),
sodium
dodecyl
sulfate
(SDS)
for
both
individual
combined
pretreatment
SS
PET.
Comparative
analysis
products
shows
that
with
(A)
effectively
disrupts
structure,
leading
loosening
stable
extracellular
polymeric
substances
(EPS).
This
condition
is
conducive
release
hydrolysis
proteins
during
hydrothermal
carbonization.
Moreover,
under
conditions
where
PET
serves
as
an
acid
producer
carbon
source,
through
parameter
optimization
at
temperature
240
°C,
reaction
time
2
h,
addition
20
wt%,
water
0.6
g
cm-3,
high-quality,
clean
fuel
was
produced
(N:
0.51
C:
19.10
wt%).
Environmental Engineering Research,
Journal Year:
2024,
Volume and Issue:
30(1), P. 240247 - 0
Published: July 7, 2024
The
hydrothermal
carbonization
(HTC)
process
is
a
promising
green
technology
for
reducing
and
reusing
sewage
sludge
can
be
powerful
tool
against
the
current
problems
of
energy
scarcity,
climate
imbalance,
environmental
pollution.
Despite
its
admirable
robustness,
HTC
easily
tuned
by
controlling
temperature
reaction
time,
as
well
biomass:water
mass
ratio
pH.
systematized
knowledge
relationship
between
these
parameters
fundamental
to
successful
innovative
research
aiming
at
scaling
up
process.
In
this
review,
bibliometric
analysis
based
on
ten
years
scientific
publications
was
carried
out.
PRISMA
guidelines
were
adopted
select
forty-seven
works
source
information
critical
discussion
key
findings
reactions
performed
in
high-pressure
reactors.
global
community
mainly
concerned
with
solid
products
(hydrochar)
study
mechanisms
removal/adsorption
nutrients,
minerals,
pollutants.
gaseous
phase
background,
opening
numerous
possibilities.
Future
outlooks
are
focused
coupling
biorefineries
strengthen
valorization
sludge,
contribute
production
biofuels
biofertilizers,
benefit
communities
currently
without
access
sanitation.
