Water Research,
Journal Year:
2024,
Volume and Issue:
255, P. 121524 - 121524
Published: March 27, 2024
In
the
context
of
circular
economy
and
global
shortage
phosphorus
(P)
fertilizer
production,
it
is
crucial
to
effectively
recover
P
during
treatment
disposal
sewage
sludge
(SS).
Although
thermal
SS
has
been
widely
applied,
a
targeted
reclamation
route
not
yet
well
established.
This
study
comprehensively
investigated
compared
physicochemical
properties
solid
residues
(hydrochar
(HC),
biochar
(BC),
ash
(SSA),
hydrochar
(HCA),
(BCA))
after
application
three
typical
techniques
(i.e.,
hydrothermal
carbonization
(180‒240
°C),
pyrolysis
(400‒600
°C)
combustion
(850
℃).
speciation
transformation
processes
were
extensively
explored
followed
by
rational
proposal
effective
routes.
Specifically,
processing
decomposed
organic
converted
non-apatite
apatite
P.
Orthophosphate-P
was
found
be
main
species
in
all
samples.
Physicochemical
resulting
thermal-derived
products
significantly
affected
thereby
determining
their
feasibility
for
different
purposes.
particular,
recommended
agricultural
use
due
higher
harmful
metals
content,
while
acid
leaching
can
an
alternative
solution
synthesize
non-Fe-containing
because
lower
co-dissolved
Fe
content
leachate.
HC
BC
offer
option
synthesis
containing
products.
Eventually,
demonstrate
great
potential
agriculture
application,
however,
comprehensive
risk
assessment
should
conducted
before
real-world
applications.
Thermal Science and Engineering Progress,
Journal Year:
2023,
Volume and Issue:
42, P. 101863 - 101863
Published: April 28, 2023
Due
to
the
specific
characteristics
of
sewage
sludge
from
food
industry,
including
its
high
fat
content,
treatment
is
quite
complex.
Therefore,
in
this
study,
effect
pre-treatment
processes
torrefaction
(T)
and
hydrothermal
carbonization
(HTC)
on
pyrolysis
industrial
(SS)
vegetable
oil
industry
was
investigated
by
thermogravimetric
analysis.
Kinetic
thermodynamic
analysis
performed
using
Kissinger-Akahira-Sunose
(KAS),
Flynn-Wall-Ozawa
(FWO),
Friedman
(FRI)
iso-conversional
kinetic
models.
In
addition,
influence
water
replacement
whey
process
subsequent
kinetics.
The
activation
energy
(Eα)
values
for
ranged
49
372
kJ/mol.
Pre-treatment
(torrefaction,
carbonization)
increases
significantly:
Eα
torrefied
(T-SS)
hydrothermally
treated
(HTC-SS)
samples
177
689
kJ/mol
161
486
kJ/mol,
respectively.
variations
generally
lower
energies
HTC-SSW
sample
(158–445
kJ/mol)
indicate
that
use
HTC
affects
hydrochar
properties
kinetics
significantly.
According
results,
reflected
better
thermochemical
stability
samples,
as
well
parameters
pyrolysis,
since
pre-treated
(especially
sample,
T-SS)
exhibited
higher
entropies
enthalpies
Gibbs
free
energies.
Materials,
Journal Year:
2024,
Volume and Issue:
17(4), P. 809 - 809
Published: Feb. 7, 2024
The
purpose
of
this
manuscript
is
to
present
a
review
laboratory
experiments
(including
methodology
and
results)
that
use
biochar,
specific
carbon
obtained
by
pyrolysis
process
from
different
feedstocks,
as
an
alternative
material
for
heavy
metal
adsorption
groundwater.
In
recent
years,
many
studies
have
been
conducted
regarding
the
application
innovative
materials
water
decontamination
develop
more
sustainable
approach
remediation
processes.
biochar
groundwater
has
particularly
attracted
interest
researchers
because
it
permits
reuse
would
be
otherwise
disposed
of,
in
accordance
with
circular
economy,
reduces
generation
greenhouse
gases
if
compared
virgin
materials.
A
approaches
results
reported
current
literature
could
useful
when
applying
technologies
at
field
scale,
preliminary
phase
which
suitability
adsorbent
evaluated
lab
scale
often
necessary.
This
paper
therefore
organised
short
description
involved
metals
production
composition.
comprehensive
analysis
knowledge
related
obtain
characteristic
parameters
are
necessary
upscaling
technology
also
presented.
An
overview
achieved
using
experimental
conditions,
such
chemical
properties
dosage
well
concentrations
their
values
pH,
reported.
At
end,
numerical
interpretation
experiment
introduced.
Water Research,
Journal Year:
2024,
Volume and Issue:
255, P. 121524 - 121524
Published: March 27, 2024
In
the
context
of
circular
economy
and
global
shortage
phosphorus
(P)
fertilizer
production,
it
is
crucial
to
effectively
recover
P
during
treatment
disposal
sewage
sludge
(SS).
Although
thermal
SS
has
been
widely
applied,
a
targeted
reclamation
route
not
yet
well
established.
This
study
comprehensively
investigated
compared
physicochemical
properties
solid
residues
(hydrochar
(HC),
biochar
(BC),
ash
(SSA),
hydrochar
(HCA),
(BCA))
after
application
three
typical
techniques
(i.e.,
hydrothermal
carbonization
(180‒240
°C),
pyrolysis
(400‒600
°C)
combustion
(850
℃).
speciation
transformation
processes
were
extensively
explored
followed
by
rational
proposal
effective
routes.
Specifically,
processing
decomposed
organic
converted
non-apatite
apatite
P.
Orthophosphate-P
was
found
be
main
species
in
all
samples.
Physicochemical
resulting
thermal-derived
products
significantly
affected
thereby
determining
their
feasibility
for
different
purposes.
particular,
recommended
agricultural
use
due
higher
harmful
metals
content,
while
acid
leaching
can
an
alternative
solution
synthesize
non-Fe-containing
because
lower
co-dissolved
Fe
content
leachate.
HC
BC
offer
option
synthesis
containing
products.
Eventually,
demonstrate
great
potential
agriculture
application,
however,
comprehensive
risk
assessment
should
conducted
before
real-world
applications.
