Algorithms,
Journal Year:
2024,
Volume and Issue:
17(12), P. 592 - 592
Published: Dec. 21, 2024
This
paper
presents
an
integrated
approach
based
on
physical–mathematical
models
and
numerical
simulations
to
optimize
sludge
treatment
using
ultrasound.
The
main
objective
is
improve
the
efficiency
of
purification
system
by
reducing
weight
moisture
sludge,
therefore
ensuring
regulatory
compliance
environmental
sustainability.
A
coupled
temperature–humidity
model,
formulated
partial
differential
equations,
describes
materials’
thermal
water
evolution
during
treatment.
resolution,
implemented
finite
element
method
(FEM),
allows
simulation
behavior
optimization
operating
parameters.
Experimental
results
confirm
that
ultrasonic
reduces
content
up
20%
improves
its
stability,
making
it
suitable
for
agricultural
applications
or
further
Functional
controls
sonication
reduction
in
correlate
with
obtained
results.
Ultrasound
has
been
shown
decrease
specific
sample
both
pretreatment
treatment,
improving
stabilization.
In
various
experimental
conditions,
reduced
a
maximum
about
50%.
Processed
transforms
waste
into
resource
sector.
Treatment
processes
have
optimized
low-energy
principles.
Additionally,
besides
utilizing
energy-harvesting
technology,
plant
optimized,
accounting
approximately
55%
consumption
due
aeration
active
sludge.
addition,
extended
analysis
wave
propagation
proposed.
Sustainability,
Journal Year:
2024,
Volume and Issue:
16(15), P. 6419 - 6419
Published: July 26, 2024
The
anaerobic
digestion
of
wastewater
treatment
sludge
(WAS)
produces
a
“green”
biogas
while
reducing
the
amount
residual
sludge.
To
increase
yield
biogas,
several
individual
or
combined
pre-treatment
methods
WAS
can
be
used.
These
substantially
reduce
volatile
suspended
solids
(VSSs)
and
their
associated
total
chemical
oxygen
demand
(TCOD).
Pre-treating
will
methane
by
15
to
30%.
Although
have
been
dealt
with
in
research
large-scale
operations,
(hybrid)
not
previously
reviewed.
Here,
different
hybrid
are
reviewed,
including
(1)
thermochemical
hydrolysis
pre-treatment,
using
an
alkaline
acid
addition
enhance
solubilization
cells
production;
(2)
high-pressure
homogenizer
combining
mechanical
treatment;
(3)
ultrasound
capable
solubilizing
organic
compounds
mechanisms,
such
as
fast
effective
disruption
increasing
effect
(NaOH)
(4)
microwave
which
enhances
at
least
20%
comparison
performance
each
separate
process;
(5)
(MW)
peroxidation
(SSs),
quickly
(<5
min)
disintegrated
MW
irradiation
80
°C;
(6)
ozone
peroxides
powerful
oxidizing
agents;
(7)
pulsed
electric
field
(PEF)
pretreatment.
All
literature
findings
assessed,
discussing
relevant
operation
conditions
results
achieved.
Ultrasonics Sonochemistry,
Journal Year:
2024,
Volume and Issue:
107, P. 106943 - 106943
Published: June 5, 2024
Slightly
acidic
(pH
5.1)
waste
sludge
with
4.7
%
Total
Solids
(TS)
was
treated
on
a
laboratory
scale
pined
disc
rotary
generator
of
hydrodynamic
cavitation
(PD
RGHC).
Influence
four
rotor
discs
different
number
generation
units
(CGUs)
investigated:
8-pins,
12-pins,
16-pins
and
8-prism
elements.
The
effect
(HC)
investigated
by
analyzing
rheological
properties,
surface
tension,
dewaterability,
particle
size
distribution.
After
subjecting
the
to
30
passes,
dewatering
ability
significantly
decreased,
resulting
in
more
than
two-fold
increase
Capillary
Suction
Time
(CST).
All
regimes
were
successful
disintegrating
particles
smaller
sizes.
A
slight
tension
measured
post
cavitation.
Cavitated
samples
displayed
zero-shear
viscosity,
contrast
untreated
sample,
where
viscosity
noticeably
increased
as
shear
stress
decreased.
HC
did
not
improve
methane
yield.
Statistically
significant
correlations
between
physio-chemical
properties
apparent
at
low
identified.
Although
there
no
discernible
statistical
differences
characteristics,
some
trends
are
visible
among
CGU
designs
warrant
further
research.
