Journal of Cleaner Production,
Journal Year:
2024,
Volume and Issue:
447, P. 141526 - 141526
Published: March 2, 2024
The
treatment
of
olive
mill
wastewater
(OMW)
represents
still
an
open
challenge
because
its
highly
polluting
load.
One
the
most
affordable
methods
for
small-medium
mills
is
to
send
OMW
industrial
plants
(IWTP).
Accordingly,
this
work
explored
a
strategy
consisting
biological
co-treatment
real
and
simulated
urban
by
moving
bed
biofilm
reactor
(MBBR),
with
without
(electro)Fenton
pre-treatment,
simulate
through
multi-barrier
approach
in
IWTP.
effluent
MBBR
despite
long
period
operation
18
months,
was
compliance
limit
total
phenols
(TPHs)
0.5
mg/L
only
at
really
low
OMW's
dilution
ratio
(DR)
(1/4000
(v/v)).
Fenton
oxidation
(FO)
electro-assisted
(EAF)
processes
were
investigated
as
pre-treatment
diluted
OMW.
FO
resulted
good
performances
terms
TPHs
removal
(81%)
improved
biodegradability
(final
BOD5/COD
=
0.35)
but
poor
COD
(24%).
EAF
more
effective
(COD
41%,
85%,
final
0.40)
than
FO.
Therefore,
finally
on
undiluted
56%,
84%,
0.62)
subsequently
co-treated
MBBR,
identifying
1/1000
optimal
DR.
interesting
option
IWTPs
successfully
address
degradation
drastically
reduce
volume
process
unit
(4
times
lower
alone).
Molecules,
Journal Year:
2025,
Volume and Issue:
30(3), P. 712 - 712
Published: Feb. 5, 2025
This
study
investigated
Rhodamine
B
(RhB)
degradation
by
electro-Fenton
(EF),
anodic
oxidation
(AO),
and
their
combination
(EF/AO),
using
a
carbon
felt
cathode
coupled
to
sub-stoichiometric
titanium
dioxide
Magnéli
phase
(Ti4O7)
anode
or
platinized
(Ti/Pt)
anode.
The
results
indicated
that
operational
parameters
influenced
the
kinetics
of
electrochemical
reactions.
An
increase
in
current
density
from
10
50
mA
cm−2
significantly
enhanced
RhB
rate;
30
was
optimal
density,
balancing
both
energy
efficiency
performance.
Moreover,
higher
concentrations
required
longer
treatment.
Microtox®
bioluminescence
inhibition
test
revealed
significant
toxicity
decrease
dye
solution
during
degradation,
which
highest
with
EF/AO.
Similarly,
total
organic
removal
EF/AO
(90%
at
pH
3),
suggesting
more
efficient
mineralization
its
by-products
than
EF
AO.
Energy
consumption
remained
relatively
stable
all
processes
throughout
480
min
electrolysis
period.
High-resolution
mass
spectrometry
elucidated
pathways,
highlighting
chain
reactions
leading
formation
intermediates
CO2
H2O.
underscores
potential
EF,
AO,
as
effective
methods
for
develop
sustainable
environmentally
friendly
wastewater
treatment
strategies.
