International Journal of Environmental Research and Public Health,
Journal Year:
2023,
Volume and Issue:
20(14), P. 6342 - 6342
Published: July 11, 2023
Coking
wastewater
is
a
typical
high-strength
organic
wastewater,
for
which
it
difficult
to
meet
discharging
standards
with
single
biological
treatment.
In
this
study,
effective
advanced
treatment
of
coking
was
achieved
by
coagulation
freshly
prepared
polyaluminum
silicate
sulfate
(PASS).
The
performance
advantage
determined
through
comparison
commercial
coagulants
including
ferric
chloride,
polyferric
sulfate,
aluminum
and
chloride.
Both
single-factor
Taguchi
experiments
were
conducted
determine
the
optimal
conditions
CODCr
UV254
as
indicators.
A
dosage
7
mmol/L
PASS,
flocculation
velocity
75
r/min,
time
30
min,
pH
7,
temperature
20
°C
could
decrease
concentration
from
196.67
mg/L
59.94
mg/L.
Enhanced
further
help
remove
compounds,
pre-oxidation
ozonation,
adsorption
activated
carbon,
assistant
polyacrylamide
secondary
coagulation.
UV
spectrum
scanning
gas
chromatography-mass
spectrometry
revealed
that
process
effectively
removed
majority
especially
high
molecular
weight
alkanes
heterocyclic
compounds.
Coagulation
PASS
provides
an
alternative
wastewater.
Applied Sciences,
Journal Year:
2024,
Volume and Issue:
14(5), P. 2184 - 2184
Published: March 5, 2024
Polluting
species
released
in
industrial-colored
effluents
contaminate
water,
degrading
its
quality
and
persisting
the
aquatic
environment;
therefore,
it
must
be
treated
for
safe
discharge
or
onsite
reuse/recycling
to
ensure
a
fresh
water
supply.
This
review
has
principal
goal
of
facilitating
understanding
some
important
issues
concerning
wastewater
(WW)
treatment
systems,
mainly
based
on
coagulation–flocculation
step,
as
follows:
(i)
significance
facilities
offered
by
specialized
processes,
including
step
single
associated
(i.e.,
followed
sedimentation/filtration
air
flotation);
(ii)
characteristics
WW,
especially
WW
from
textile
industry,
which
can
reduced
via
step;
(iii)
primary
secondary
groups
hybrid
materials
their
when
used
coagulants–flocculants;
(iv)
influence
different
process
operating
variables
regimens
efficiency
studied
(v)
benefits
using
colored
processes
future
development
perspectives.
The
consulted
scientific
reports
underline
applying
coagulants–flocculants
treatment,
fresh,
natural
that
achieve
high
removal
rates,
e.g.,
dye
color
>80%,
heavy
metals,
COD
BOD
>50%,
turbidity
>90%.
All
reported
data
feasibility
these
polluting
(especially
dyes)
industrial
possibility
selecting
adequate
one
specific
system.
