Energies,
Journal Year:
2024,
Volume and Issue:
17(17), P. 4447 - 4447
Published: Sept. 5, 2024
The
effective
management
of
waste-activated
sludge
(WAS)
presents
a
significant
challenge
for
wastewater
treatment
plants
(WWTPs),
primarily
due
to
the
sludge’s
high
content
organic
matter,
pathogens,
and
hazardous
substances
such
as
heavy
metals.
As
urban
populations
industrial
activities
expand,
increasing
volume
WAS
has
intensified
need
sustainable
solutions.
Conventional
approaches,
landfilling
anaerobic
digestion,
are
frequently
ineffective
resource-intensive,
particularly
when
dealing
with
protective
extracellular
polymeric
(EPS)
that
render
resistant
biodegradation.
Thermal
pretreatment
methods
have
gained
attention
their
ability
enhance
biodegradability
sludge,
improve
dewaterability,
facilitate
resource
recovery.
These
processes
function
by
breaking
down
complex
structures
within
thereby
its
accessibility
subsequent
treatments
digestion.
integration
thermal
chemical
can
further
optimize
process,
resulting
in
higher
biogas
yields,
reduced
pathogen
content,
lower
environmental
risks.
While
disintegration
is
energy-intensive,
advancements
energy
recovery
process
optimization
made
it
more
viable
environmentally
friendly
option.
This
approach
offers
pathway
efficient
practices,
which
align
goals
reducing
waste
complying
stricter
regulations.
Applied Sciences,
Journal Year:
2025,
Volume and Issue:
15(2), P. 857 - 857
Published: Jan. 16, 2025
Magnetic
ferrite
nanoparticles
have
a
broad
application
in
wastewater
treatment,
and
the
interest
applying
these
particles
specifically
waste
treatment
is
growing.
However,
gap
understanding
how
properties
that
are
controllable
through
synthesis
methods
affect
efficiency
needs
to
be
better
explained.
In
this
review,
we
assess
analysis
of
most
impactful
publications
highlight
nanoparticles’
different
their
parameters
connected
efficiency.
For
long
time,
were
seen
as
adsorbents
suitable
for
physically
removing
pollutants,
but
recent
studies
show
nanostructures
could
UV
visible
light-induced
photocatalytic
decomposition
contaminants.
Energies,
Journal Year:
2024,
Volume and Issue:
17(17), P. 4219 - 4219
Published: Aug. 23, 2024
Biomass-to-biofuel
conversion
represents
a
critical
component
of
the
global
transition
to
renewable
energy.
One
most
accessible
types
biomass
is
sewage
sludge
(SS).
This
by-product
from
wastewater
treatment
plants
(WWTPs)
contains
microplastics
(MPs)
originating
household,
industrial
and
urban
runoff
sources.
Due
their
small
size
(<5
mm)
persistence,
MPs
present
challenge
when
they
are
removed
systems,
where
mainly
accumulate
(~90%).
The
presence
in
SS
poses
environmental
risks
biosolids
applied
as
fertilizer
agriculture
or
incinerated
for
purpose
energy
production.
key
problem
efficient
reliable
identification
reduction
due
lack
standardized
procedures.
methods
might
involve
physical,
chemical,
biological,
hydrothermal
approaches,
including
carbonization
(HTC).
HTC
produces
hydrochar
(HC),
solid
biofuel,
presents
cutting-edge
approach
that
simultaneously
addresses
secondary
microplastic
pollution
biomass-derived
In
this
article,
we
review
briefly
content
different
countries,
promising
method
removal
SS.
conclusion,
(i)
effectively
reduces
abundance
biosolids,
(ii)
an
improved
source
energy,
(iii)
contributes
circular
management.
Advanced Sustainable Systems,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 1, 2025
Abstract
The
development
of
technologies
for
replacing
formaldehyde‐based
adhesives
and
disposing
sewage
sludge
(SS)
are
two
standing
issues
high
interest
to
the
academy
industry.
This
study
reports
production
formaldehyde‐free
wood
bio‐adhesive
using
hydrochar
from
hydrothermal
carbonization
SS
aided
by
sodium
periodate
(NaIO4)
oxidation.
performance
bio‐adhesives
can
meet
requirements
Chinese
National
Standard
GB/T
9846‐2015
(≥0.7
MPa).
aldehyde
group
forms
after
NaIO4
treatment
hydrochar,
which
should
benefit
adhesion
performance.
However,
oxidation
process
also
breaks
some
polysaccharides'
carbon
chains,
disrupting
extracellular
polymeric
substances
(EPS)
structure
in
forming
small
molecular
compounds.
As
a
result,
wet
shear
strength
value
decreases,
but
water
resistance
increases.
Nevertheless,
interaction
between
active
functional
groups
(e.g.,
amine
groups)
during
hot‐pressing
promotes
In
addition,
doping
polyethyleneimine,
cross‐linked
network
be
further
enhanced,
improving
resistance.
Hence,
introducing
is
key
step
bio‐adhesives,
proving
as
novel
practical
approach
valorize
producing
adhesives.
Energies,
Journal Year:
2024,
Volume and Issue:
17(14), P. 3380 - 3380
Published: July 10, 2024
The
optimal
process
conditions
concerning
the
hydrothermal
carbonization
of
digested
sewage
sludge
are
crucial
to
economically
effective
technology
needed
produce
a
solid
product,
hydrochar,
for
energy
purposes.
Accordingly,
different
residence
times,
0.5
h,
1
h
and
2
were
investigated
in
order
understand
effect
time
on
process.
Furthermore,
physical
chemical
properties
hydrochar
compared
raw
material.
For
these
reasons,
analyses
describing
fuel
performed,
including
ultimate
proximate
analyses,
HHV,
TGA
analysis.
latter
method
was
employed
study
combustion
samples.
In
addition,
oxide
content
elements
within
ash
samples
determined
using
XRF
calculate
indices
related
operational
problems
during
results
confirmed
that
did
not
matter
significantly
very
similar
each
other.
However,
contact
angle
longer
processing
resulted
more
hydrophobic
character
enabled
dewaterability
slurry.
It
also
noted
affected
positive
way.
brief,
brittle,
moderately
hydrophilic,
carbon-containing
product
provided
performance
than
sludge.
Energy,
Journal Year:
2024,
Volume and Issue:
305, P. 132327 - 132327
Published: July 6, 2024
Dark
fermentation
(DF),
hydrothermal
carbonization
(HTC)
and
anaerobic
digestion
(AD)
are
applied,
in
different
combinations,
to
cheese
whey
(CW),
which
is
the
liquid
effluent
from
precipitation
removal
of
milk
casein
during
cheese-making
process.
The
aim
novelty
this
research
investigate
production
various
biofuels
(H2-rich
gas,
hydrochar
biogas)
cascade,
according
waste
biorefinery
concept.
simplest
case
direct
AD
CW.
second
investigated
possibility
preliminary
HTC
CW,
producing
hydrochar,
followed
by
process
water
separated
filtration.
third
based
on
DF
fermentate
(F)
DF.
final
F,
then
water.
Accordingly,
physical
chemical
properties
resulting
(PW),
biomethane
potentials
waters
studied
determine
energy
carbon
balances
all
variants.
In
brief,
first
variant,
believed
be
most
efficient
method.
