Revista Brasileira de Geografia Física,
Год журнала:
2024,
Номер
17(3), С. 1833 - 1847
Опубликована: Май 7, 2024
The
research
problem
is
to
reduce
the
use
of
chemical
coagulants
by
seeking
more
sustainable
alternatives
water
treatment.
Moringa
oleifera
(MO)
a
good
alternative
coagulant
agent,
indicated
in
treatment
system,
its
clarification
process,
addition
being
biodegradable,
but
there
need
look
for
other
seeds
that
also
have
potential
be
used
as
natural
coagulants,
this
context,
it
justified
study
typical
from
Portugal,
where
was
carried
out,
an
coagulant.
hypothesis
project
is:
among
typically
European
selected
evaluation,
with
high
will
found.
This
aims
identify
seeds,
similar
Lam
out
partnership
UFS,
IFS
and
ISEP,
experiments
were
synthetic
turbidity
ranging
40
350
NTU.
four
different
types
chestnuts,
American
Portuguese
nuts,
plantain
oleifera,
chestnut
walnut
shells.
From
results
found,
Spanish
chestnuts
stand
removal
efficiency
up
69.8%
water,
MO
89.8%
water.
Journal of Water Process Engineering,
Год журнала:
2023,
Номер
53, С. 103869 - 103869
Опубликована: Июнь 1, 2023
Coagulation–flocculation
is
currently
the
best
practice
for
aquaculture
effluent
treatment,
and
biobased
compounds
are
emerging
as
coagulant/flocculants.
This
study
aimed
to
characterize
bioflocculant
produced
from
Serratia
marcescens
applied
it
treat
artificial
turbid
water
(kaolin
substrate)
real
using
combination
of
one
variable
at
a
time
(OVAT)
response
surface
methodology
(RSM)
analyses.
The
by
S.
was
characterized
anionic
flocculant
with
isoelectric
point
pH
1.7
13.3.
At
7,
its
protein
content
1.3
μg/mL,
total
carbohydrate
level
0.53
mg/L.
consisted
various
carboxylic
acids
enzyme
intermediates,
indicating
presence
polysaccharides
protein.
Comparison
optimized
treatment
conditions
between
OVAT
RSM
showed
that
rapid
mixing
speed,
slow
time,
sedimentation
were
most
influential
factors
coagulation–flocculation.
required
lower
speed
(125
rpm)
shorter
(39
min)
than
wastewater
(160
rpm
67
min,
respectively).
low
performance
in
treating
due
more
complex
characteristics
compared
those
kaolin
substrate.
characterization
terms
level,
content,
has
never
been
reported.
obtained
results
may
provide
an
insight
into
potential
this
compound
substitute
widely
used
chemical
flocculants
reliable
performance.
findings
also
be
basis
upscale
coagulation–flocculation
being
laboratory
wastewater,
especially
use
compounds.
Toxics,
Год журнала:
2025,
Номер
13(2), С. 131 - 131
Опубликована: Фев. 11, 2025
Aquaculture
wastewater
treatment
not
only
assists
in
alleviating
the
scarcity
of
clean
water
for
daily
usage
and
environmental
pollution,
but
also
generates
valuable
byproducts.
This
paper
aims
to
review
generation
from
aquaculture
sector,
its
characteristics,
available
technologies,
while
comprehensively
discussing
adoption
a
biocircular
economy
approach
through
waste
valorization.
With
rich
nutrients,
such
as
nitrogenous
compounds,
presence
phosphorus
effluent,
these
aspects
could
be
explored
valorized
into
biofertilizers,
broadening
their
application
aquaponics
hydroponics,
well
algae
daphnid
cultivation.
Biofertilizer
can
used
agriculture
because
it
contains
essential
elements
needed
by
plants.
Thus,
methods
converting
nutrients
biofertilizers
terms
sludge
recovery
accomplished
via
anaerobic
aerobic
digestion,
drying,
composting,
vermicomposting.
Moving
forward,
effluent
is
addressed
under
re-engaging
effluents
production
cycle.
The
enhancement
biomass
uses
aquaponics,
cultivation,
co-cultivation,
presents
opportunities
nutrient
ensuring
that
non-toxic
safely
discharged
external
bodies.
has
potential
revolutionize
aquaculture,
shifting
economic
model
management
linear
system
circular,
more
sustainable
one.
Heliyon,
Год журнала:
2024,
Номер
10(7), С. e27584 - e27584
Опубликована: Март 19, 2024
The
growing
problem
of
industrial
pollution
in
developing
countries,
especially
Ethiopia,
has
sparked
serious
issues
about
the
quality
water,
particularly
when
it
comes
to
effluent
from
wet
coffee
processing
industries.
In
response,
this
study
investigates
potential
utilizing
natural
coagulants,
Acanthus
sennii
C.,
Moringa
stenopetala
B.,
and
Aloe
vera
L.,
either
individually
or
combination,
for
treatment
effluent.
Methodologically,
systematically
varies
operational
parameters,
including
coagulant
dose,
pH
levels,
stirring
speed,
time,
evaluate
their
impact
on
coagulation
efficiency.
Experimental
data
undergo
statistical
analysis,
employing
ANOVA,
while
computational
optimization
techniques
are
employed
using
Design
Expert
software
determine
optimal
conditions.
Notably,
blended
form
three
coagulants
emerges
as
promising,
yielding
conditions
0.750
g/L
dosage,
8.76,
agitation
speed
80.73
rpm,
time
19.23
min.
Under
these
optimized
conditions,
achieves
remarkable
removal
efficiencies,
approximately
99.99%
color
98.7%
turbidity.
These
findings
underscore
efficiency
form,
sustainable
wastewater
processing.
Heliyon,
Год журнала:
2023,
Номер
9(4), С. e15011 - e15011
Опубликована: Март 31, 2023
In
recent
years,
utilization
of
polysaccharides
as
natural
coagulant
and
coagulant-aid
has
become
a
topic
interest,
due
to
the
nature
biopolymers
that
are
renewable,
biodegradable,
non-toxic.
this
study,
Congo
red,
model
dye
substance,
was
treated
using
polyaluminium
chloride
(PAC)
main
xanthan
gum
aid.
For
purpose,
effect
pH
(3-9),
dose
(0.5-4
mg/L),
initial
concentration
red
(50-100
mg/L)
removal
sludge
volume
were
investigated.
The
outcome
investigation
indicates
best
for
coagulation
occurred
at
3,
charge
neutralization
mechanism.
addition
increases
%-removal
until
reaching
2
mg/L
results
in
value
93.81%
23.5
mL/L.
Further
reduced
inter-polymer
force
causing
more
difficult
floc
formation.
50
mg/L,
with
PAC
(15
(2
coagulants.
This
is
considerably
higher
than
only
which
amounts
81.16
7.18%,
respectively.
Based
on
these
results,
it
apparent
can
positively
contribute
while
reducing
use
harmful
inorganic
coagulant.
Heliyon,
Год журнала:
2023,
Номер
9(6), С. e17284 - e17284
Опубликована: Июнь 1, 2023
The
batik
industry
has
been
one
of
the
main
family
businesses
in
most
east-coast
region
Malaysian
peninsula
for
many
years.
However,
appropriate
water
treatment
is
still
a
major
challenge
this
industry.
Stringent
laws
introduced
by
authorities
and
intention
to
protect
environment
are
factors
that
drive
researchers
search
suitable,
appropriate,
affordable
efficient
wastewater.
Treatment
research
on
wastewater
lacking
coagulation-flocculation
using
alum
was
chosen
as
stepping
stone
toward
selection
green
coagulants.
This
study
aimed
determine
best
conditions
flocculation-coagulation
standard
jar
test
method.
Four
were
investigated:
dosage
(0.1-3.5
g/L),
pH
(4-11),
settling
time
(0.5-24
h)
rapid
mixing
rate
(100-300
rpm).
Results
obtained
further
analysed
statistically
SPSS
software
prior
determining
significant
effect
variable
changes.
From
study,
process
found
be
at
1.5
g/L,
8,
4
h
100
rpm.
Chemical
oxygen
demand
(COD),
turbidity,
colour
total
suspended
solids
(TSS)
removed
70.7,
92.2,
88.4
100%,
respectively,
under
these
conditions.
showed
can
treated
chemical
means
alum.
indicates
need
forthcoming
developments
natural-based-coagulant-flocculants
sustainability
Heliyon,
Год журнала:
2023,
Номер
9(5), С. e16278 - e16278
Опубликована: Май 1, 2023
Chemical
coagulation–flocculation
has
been
used
widely
in
water
and
wastewater
treatment.
In
the
present
study,
green
coagulant
was
investigated.
The
role
of
Iraqi
plants
examined
to
remove
turbidity
by
using
kaolin
synthetic
water.
Thirteen
selected
were
prepared
as
powdered
coagulant.
experiment
run
based
on
mass
varied
from
0
10,000
mg/L
for
each
plant
with
a
rapid
mixing
speed
180
rpm
5
min,
slow
at
50
15
min
settling
time
30
min.
seven
best
coagulants
are
Albizia
lebbeck
(L.),
Clerodendrum
inerme
(10,000
mg/L),
Azadirachta
indica,
Conocarpus
lancifolius,
Phoenix
dactylifera
(5000
Dianthus
caryophyllus
(3000
mg/L)
Nerium
oleander
(1000
removal
rates
39.3%,
51.9%,
67.2%,
75.5%,
51.0%,
52.6%
57.2%,
respectively.
that
economically
feasible
achieve
highest
other
compounds.
