Research Square (Research Square),
Год журнала:
2023,
Номер
unknown
Опубликована: Дек. 12, 2023
Abstract
This
study
investigates
the
effect
of
microwave
(MW)
treatment
on
disintegration
municipal
activated
sludge.
Sludge
samples
underwent
heating
at
a
targeted
temperature
90°C
for
35
minutes,
with
5-minute
retention
time.
Soluble
chemical
oxygen
demand
(sCOD),
sugars,
proteins,
nitrogen
(N),
and
phosphorus
(P)
exhibited
notable
increases
compared
to
untreated
samples.
Results
indicate
substantial
(42-45%)
rise
in
methane
production
during
anaerobic
digestion
process
disintegrated
sludge
counterpart
Methane
was
estimated
using
transference
model,
which
showed
best
fit
other
models.
Further
experimentation
involved
testing
digested
excess
soluble
ammonium
recovery
struvite
1.50/1/1
(Mg/N/P)
ratio.
The
findings
reveal
that
up
90.09%
90.43%
orthophosphate
ammonium,
respectively,
can
be
efficiently
removed
from
solution.
Despite
increased
output,
energy
recovered
insufficient
offset
electrical
used
by
MW.
Notably,
filter
resistance
performance
deteriorated
significantly,
increasing
1.64×10
14
m/kg
control
3.76×10
treated
Key engineering materials,
Год журнала:
2024,
Номер
1002, С. 103 - 118
Опубликована: Дек. 19, 2024
Wastewater
treatment
plants,
particularly
anaerobic
digesters,
face
significant
challenges
related
to
the
deposition
of
struvite,
a
mineral
scale
composed
magnesium
ammonium
phosphate
hexahydrate.
The
formation
and
accumulation
struvite
can
lead
blockages
in
system,
reducing
flow
rates
overall
plant
efficiency.
This
article
explores
necessity
removal
for
proper
function
potential
recovery
due
its
rich
nutrient
content,
specifically
phosphorus
nitrogen,
which
be
repurposed
agriculture.
Struvite
not
only
mitigates
problems
but
also
addresses
ecological
risks
associated
with
nutrient-rich
effluents.
excess
nutrients
wastewater
effluent
contribute
water
pollution,
leading
eutrophication,
algal
blooms,
oxygen
depletion,
negatively
impacting
aquatic
ecosystems
life.
Furthermore,
as
world's
reserves
are
finite
depleting,
recovering
from
aids
conserving
this
non-renewable
resource.
To
facilitate
efficient
recovery,
it
is
crucial
control
crystals.
Key
factors
affecting
process
include
pH,
temperature,
supersaturation,
mixing
energy.
Understanding
optimal
conditions
these
parameters
vital
maximizing
recovery.
Various
technologies
such
chemical
precipitation,
biomineralization,
seeding,
ultrasound,
electrochemical
being
studied
enhance
offering
sustainable
innovative
approaches
address
challenge.
Overall,
review
various
techniques
utilized
recover
form
contributes
management
systems.
