Environmental Science Water Research & Technology,
Journal Year:
2023,
Volume and Issue:
10(2), P. 498 - 509
Published: Dec. 13, 2023
In
the
lack
of
organic
carbon
sources,
with
an
electrode
as
electron
donor
aerobic
denitrification
yields
higher
current
production
and
faster
nitrate
removal
than
anaerobic
denitrification.
E3S Web of Conferences,
Journal Year:
2024,
Volume and Issue:
514, P. 01002 - 01002
Published: Jan. 1, 2024
The
study
optimized
a
step-feed
anoxic-oxic
membrane
bioreactor
(AO-MBR)
with
methanol
addition,
an
existing
biological
nitrogen
removal
(BNR)
process,
to
improve
total
(TN)
and
reduce
operating
costs.
Methanol,
utilized
as
external
carbon
source,
was
costly,
which
led
examining
ways
its
usage
by
adjusting
the
operational
parameters
modifying
configuration.
BioWin’s
built-in
activated
sludge
model
underwent
calibration
through
biokinetic
batch
experiments
numerical
adjustments
of
stoichiometric
kinetic
create
BNR
process
model.
Dynamic
simulations
validated
calibrated
Using
model,
modified
configuration
20.8%
increase
in
anoxic
volume
proposed.
This
increased
hydraulic
retention
time,
improving
denitrification
process.
response
surface
methodology
(RSM)
then
used
optimize
for
maximum
TN
efficiency
minimum
cost.
found
were
0.5
mg/L
dissolved
oxygen,
45
days
solid
0:1
distribution
ratio,
1,794.29
L/d
methanol,
all
enhanced
resulted
16%
efficiency,
4.12%
decrease
costs,
8.96%
reduction
usage.
Sustainability,
Journal Year:
2024,
Volume and Issue:
16(10), P. 4269 - 4269
Published: May 19, 2024
Simultaneous
nitrification
and
autotrophic
denitrification
(SNAD)
has
received
attention
as
an
efficient
biological
nitrogen
removal
alternative.
However,
SNAD
using
elemental
sulfur
(S0)
scarcely
been
studied.
Thus,
the
main
objective
of
this
research
was
to
study
behavior
a
simultaneous
nitrification–autotrophic
operation
in
sequential
batch
reactor
(SNAD-SBR)
at
lab
scale
S0
electron
donor,
including
its
kinetics.
Two-scale
reactors
were
operated
scales
cycles
for
155
days
with
increasing
loading
rate
(NLR:
0.0296
0.0511
kg
N-NH4+/m3/d)
31
°C.
As
result,
donor
performed
successfully,
efficiency
98.63%
44.9%,
limiting
phase.
The
kinetic
model
adjusted
ammonium-oxidizing
bacteria
(AOB)
Monod-type
(µmax
=
0.791
d−1),
while,
nitrite-oxidizing
(NOB),
Haldane-type
employed
0.822
d−1).
For
denitrifying
microorganisms,
by
half
order
(k1/2v
0.2054
mg1/2/L1/2/h).
we
concluded
that
could
be
feasible
similar
other
processes.
Environmental Science Water Research & Technology,
Journal Year:
2023,
Volume and Issue:
10(2), P. 498 - 509
Published: Dec. 13, 2023
In
the
lack
of
organic
carbon
sources,
with
an
electrode
as
electron
donor
aerobic
denitrification
yields
higher
current
production
and
faster
nitrate
removal
than
anaerobic
denitrification.