Production and Quality Assessment of Fertilizer Pellets from Compost with Sewage Sludge Ash (SSA) Addition
Materials,
Год журнала:
2025,
Номер
18(5), С. 1145 - 1145
Опубликована: Март 4, 2025
This
article
examines
the
process
of
pressure
agglomeration
garden
waste
compost
mixed
with
sewage
sludge
ash
(SSA)
to
produce
granulated
fertilizer
material,
using
a
flat
die
rotating
compaction
roller
system.
The
study
evaluated
effects
adding
SSA
at
mass
fractions
0%,
10%,
20%,
30%,
40%,
and
50%
on
pelleting
quality
pellets.
Increasing
content
from
0%
reduced
power
demand
pellet
mill
by
13.5%
(from
4.92
kW
4.25
kW),
decreased
kinetic
strength
pellets
0.7%
98.21%
97.56%),
slightly
increased
density,
2.6%
1641.17
kg·m-3
1684.09
kg·m-3).
high
density
pellets,
i.e.,
over
1600
kg·m-3,
indicates
that
they
are
market
quality.
A
chemical
analysis
revealed
addition
positively
influenced
properties.
higher
(up
50%)
nitrogen
(1.4%
0.73%)
but
significantly
phosphorus
(0.32%
2.67%).
potassium
remained
stable,
approximately
1.3%.
co-pelleting
also
diluted
heavy
metals
present
in
SSA,
reducing
final
product's
lead
cadmium
levels
meet
standards
set
for
fertilizers.
Although
contained
(lead:
93.89
mg·kgd.m.-1,
cadmium:
11.28
mg·kgd.m.-1),
these
elements
were
not
detected
compost.
Co-pelleting
produces
high-density,
high-quality
favorable
nutrient
profiles
metal
contents,
complying
regulatory
standards.
Moreover,
converting
into
valuable
agricultural
products,
supports
sustainable
management.
impact
additives
composition
water
absorption
granulate,
providing
insights
its
suitability
as
an
eco-friendly
alternative
potential
implications
practices.
Язык: Английский
Polycyclic Aromatic Hydrocarbons (PAHs) in Wheat Straw Pyrolysis Products Produced for Energy Purposes
Sustainability,
Год журнала:
2024,
Номер
16(22), С. 9639 - 9639
Опубликована: Ноя. 5, 2024
Using
agricultural
waste
biomass
pyrolysis
to
produce
energy
sources
and
biochar
may
support
local
economies
in
rural
areas
enhance
sustainability
the
sector,
reducing
dependence
on
traditional
fertilisers.
To
obtain
liquid
gaseous
forms
of
fuel,
wheat
straw
pellets
were
pyrolysed
a
screw
reactor
at
temperatures
300,
400,
500,
600,
700
°C.
An
analysis
was
conducted
assess
influence
process
temperature
physicochemical
composition
raw
material
resulting
biochar,
liquid,
synthesis
gas.
The
presence
potentially
harmful
substances
whose
addition
soil
can
improve
properties,
assessed
by
quantitatively
determining
polycyclic
aromatic
hydrocarbons
(PAHs).
Similar
tests
carried
out
for
fluid.
assessments
based
standards
most
dangerous
PAHs:
fluorene,
anthracene,
fluoranthene,
benzo[b]fluorine,
benz[a]anthracene,
chrysene,
benzo[b]fluoranthene,
benzo[k]fluoranthene,
benzo[a]pyrene,
dibenz[a,h]anthracene,
benzo[g,h,i]perylene,
indeno[1,2,3-cd]pyrene.
results
indicated
that
total
content
ranged
from
346.81
µg·kg−1
300
°C
1660.87
(700
°C).
In
pyrolytic
fluid,
PAH
58,240.7
(300
°C)
101,889.0
(600
It
found
increase
both
progressed
with
increasing
temperature.
After
finding
correlation
between
high-energy
gases
gas,
it
concluded
is
difficult
reconcile
production
PAH-free
obtaining
gas
oil.
Язык: Английский