Waste,
Год журнала:
2023,
Номер
1(4), С. 960 - 976
Опубликована: Ноя. 24, 2023
Dye-containing
effluent
generated
in
textile
industries
is
polluting
and
complex
wastewater.
It
should
be
managed
adequately
before
its
final
destination.
The
up-flow
anaerobic
blanket
(UASB)
reactor
application
an
ecofriendly
cost-competitive
treatment.
present
study
briefly
reviews
the
UASB
for
dye-containing
wastewater
valorization.
Bioenergy
clean-water
production
potential
during
treatment
are
emphasized
to
promote
resource
recovery
industries.
Hydraulic
retention
time
(HRT),
organic
loading
rate
(OLR),
pH,
temperature,
hydraulic
mixing
influence
sludge
granulation,
microbial
activity,
dye
removal.
HRT
OLR
ranges
of
6–24
h
1–12
kg
m−3
d−1
chemical
oxygen
demand
(COD)
at
a
mesophilic
temperature
(30–40
°C)
recommended
efficient
In
these
conditions,
efficiencies
color
COD
50–97%
60–90%
reported
bench-scale
studies.
Complex
structures
can
hinder
biomineralization.
Pretreatment
may
necessary
reduce
concentration.
Carbon-source
redox
mediators
added
expedite
kinetic
reactions.
A
biogas
yield
1.48–2.70
L
UASB,
which
treats
effluents,
documented.
Cotreatment
locally
available
substrate
could
increase
productivity
reactors.
Organic
waste
industry,
such
as
sludge,
cotton,
starch,
make
cotreatment
cost
competitive.
water
reuse
allow
environmental
economic
benefits.
Studies
on
combined
systems
integrating
membrane
processes,
ultrafiltration
nanofiltration,
reusable
pretreatment
improvements
might
realize
complete
technology.
bioenergy
usage
integrated
trains
operating
costs
assist
process
sustainability
industry.
The
pyrolysis
process
has
emerged
as
an
attractive
option
for
waste
treatment.
In
this
technology,
inorganic
compounds
play
catalytic
effects
in
the
pyrolytic
reaction
of
organic
materials,
increa-sing
char's
yield,
porosity,
and
physicochemical
properties.
present
research
investigates
compares
slow
spent
coffee
grounds
(SCG)
using
potassium
hydroxide
(KOH)
(weight
ratio
1:1)
landfill
leachate
membrane
concentrate
(LLMC)
residue
pyrolitic
additives.
We
hypothesized
that
high
content
alkali
alkaline
earth
metals
LLMC
could
enhance
yield
or
improve
quality
carbon-based
material
produced
pyrolysis.
This
strategy
be
a
sustainable
alternative
valorizing
SCG
wastes,
replacing
catalyzing
agents
such
steam,
CO2,
chemical
additives
used
on
industrial
scale.
char
yields
ranged
from
18
to
24%.
had
low
specific
surface
area
(4.5
m2
g-1),
contrasting
with
notable
areas
observed
both
ac-tivated
chars.
particular,
KOH-activated
displayed
higher
than
LLMC-activated
(1960
vs.
1130
g-1).
On
other
hand,
combustion
enthalpy
was
estimated
at
22
MJ
kg-1.
value
22%
energy
comparison.
Our
findings
confirm
KOH
produces
microporous
area.
contrast,
resulting
demonstrates
calorific
value.
contribute
establishing
potential
applications
residues
produce
high-value
materials.
Resource
depletion
and
climate
change
have
fostered
sustainable
initiatives
in
the
waste
management
sector.Pyrolysis
(Py)
has
emerged
as
an
option
for
valorizing
spent
coffee
grounds
(SCG).In
addition,
inorganic
compounds
can
catalytic
effects
on
pyrolytic
reaction
of
organic
materials,
increasing
char
yield
porosity
biochar.This
study
investigates
slow
pyrolysis
SCG
using
concentrated
landfill
leachate
residue
(CLLR)
(1:1
wt%)
a
pyrolitic
additive
due
to
its
high
salinity.Biochars
were
characterized
based
their
thermal
behavior
discuss
environmental
benefits
potential
applications.Slow-py
experiments
conducted
labscale
pyrolizer,
characterization
was
performed
TA
Instruments,
specifically
SDTQ600
model.Biochars
by
higher
water
contents
heating
rates
than
those
experienced
feedstocks.It
is
suggested
that
metal
content
CLLR
could
biochar's
stability,
decreasing
decomposition
temperature.Values
9.18
wt%
18.11
MJ
kg
-1
23.25
22.05
biochars
produced
wt%),
respectively.Future
studies
will
include
biochar
ecotoxicity
analyses
measure
carbon-energy
balance.
Waste,
Год журнала:
2023,
Номер
1(4), С. 960 - 976
Опубликована: Ноя. 24, 2023
Dye-containing
effluent
generated
in
textile
industries
is
polluting
and
complex
wastewater.
It
should
be
managed
adequately
before
its
final
destination.
The
up-flow
anaerobic
blanket
(UASB)
reactor
application
an
ecofriendly
cost-competitive
treatment.
present
study
briefly
reviews
the
UASB
for
dye-containing
wastewater
valorization.
Bioenergy
clean-water
production
potential
during
treatment
are
emphasized
to
promote
resource
recovery
industries.
Hydraulic
retention
time
(HRT),
organic
loading
rate
(OLR),
pH,
temperature,
hydraulic
mixing
influence
sludge
granulation,
microbial
activity,
dye
removal.
HRT
OLR
ranges
of
6–24
h
1–12
kg
m−3
d−1
chemical
oxygen
demand
(COD)
at
a
mesophilic
temperature
(30–40
°C)
recommended
efficient
In
these
conditions,
efficiencies
color
COD
50–97%
60–90%
reported
bench-scale
studies.
Complex
structures
can
hinder
biomineralization.
Pretreatment
may
necessary
reduce
concentration.
Carbon-source
redox
mediators
added
expedite
kinetic
reactions.
A
biogas
yield
1.48–2.70
L
UASB,
which
treats
effluents,
documented.
Cotreatment
locally
available
substrate
could
increase
productivity
reactors.
Organic
waste
industry,
such
as
sludge,
cotton,
starch,
make
cotreatment
cost
competitive.
water
reuse
allow
environmental
economic
benefits.
Studies
on
combined
systems
integrating
membrane
processes,
ultrafiltration
nanofiltration,
reusable
pretreatment
improvements
might
realize
complete
technology.
bioenergy
usage
integrated
trains
operating
costs
assist
process
sustainability
industry.
