Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: Nov. 28, 2024
Applying
anammox
to
municipal
wastewater
treatment
promises
enormous
energy
and
resource
savings;
however,
seasonally
cold
conditions
pose
a
considerable
challenge,
impeding
its
future
applications
towards
non-tropical
regions.
In
this
study,
we
establish
pilot-scale
plant
(50
m3/d)
in
northern
China
implement
the
partial
denitrification
coupling
process
on
actual
wastewater.
Despite
seasonal
cooling,
nitrogen
removal
efficiency
remains
high,
ranging
from
75.0
±
4.6%
at
27.8–20.0
°C
70.4
4.5%
10–7.5
°C.
This
exhibits
remarkable
low-temperature
tolerance,
achieving
an
in-situ
rate
of
32.7
4.7
g-N/(m3·d)
contributing
up
39.7
6.7%
removal.
Further
15N
stable
isotope
tracing
kinetic
tests
reveal
that
is
capable
supplying
increasingly
abundant
NO2-
with
decreasing
temperature,
enabling
robust
mainstream
against
cooling.
From
27.8
7.5
°C,
bacteria
not
only
survive
but
thrive
under
conditions,
absolute
relative
abundances
increasing
by
429.1%
343.5%,
respectively.
study
sheds
fresh
light
extending
regions,
taking
necessary
step
forward
toward
sustainability
goals
sector.
Low
temperatures
challenges
applying
sustainable
technology
Here,
authors
propose
conduct
evaluation,
offering
insights
into
colder
locations.
ACS ES&T Engineering,
Journal Year:
2023,
Volume and Issue:
3(11), P. 2097 - 2108
Published: Oct. 19, 2023
Accelerating
the
start-up
of
anaerobic
ammonium
oxidation
(anammox)
is
primary
condition
for
its
large-scale
application.
Anammox
with
magnetic
biochar
took
shortest
time,
reducing
15–24
days
compared
to
control
blank
(CK)
and
6–26
pyrolytic
biochar.
FCS300
(magnetic
prepared
at
300
°C)
could
produce
highest
levels
heme
c
(0.123
μmol/g
VSS).
The
extracellular
polymeric
substances
(EPS)
in
had
lowest
R
ct
(12.6
kΩ)
a
substantially
higher
electron-transfer
capability
(ETC).
Candidatus
jettenia
was
main
anammox
bacteria
(AnAOB)
reactors
after
successful
start-up,
distribution
spatially
variable
on
suspended
sludge
biofilm
findings
implied
that
might
improve
electron
transfer
by
shortening
time
via
an
shuttle
mechanism
or
direct
interspecies
transfer.
Environmental Science & Technology,
Journal Year:
2023,
Volume and Issue:
57(51), P. 21767 - 21778
Published: Dec. 14, 2023
The
anoxic
zone
serves
as
the
core
functional
unit
in
municipal
wastewater
treatment
plants
(MWWTPs).
Unfortunately,
most
cases,
downstream
range
of
is
severely
lacking
available
organic
carbon
and
thus
contributes
little
to
removal
nutrients.
This
undesirable
termed
"carbon-restricted
zone",
representing
an
insurmountable
drawback
for
traditional
MWWTPs.
study
uncovers
a
previously
overlooked
role
carbon-restricted
zone:
hotspot
anaerobic
ammonium
oxidation
(anammox).
In
continuous-flow
pilot-scale
plant
treating
(55
m3/d),
virgin
biocarriers
were
introduced
into
(downstream
25%
with
BOD5
5.9
±
2.3
mg/L).
During
517-day
monitoring,
anammox
bacteria
highly
self-enriched
within
biofilms,
absolute
relative
abundance
reaching
up
(9.4
0.1)
×
109
copies/g-VSS
6.17%
(Candidatus
Brocadia),
respectively.
15N
isotopic
tracing
confirmed
that
overwhelmingly
dominated
nitrogen
metabolism,
responsible
92.5%
removal.
Following
this
upgrade,
contribution
ratio
total
increased
from
9.2
4.1%
19.2
4.2%
(P
<
0.001),
while
its
N2O
emission
flux
decreased
by
84.5%
0.001).
These
findings
challenge
stereotypes
about
highlight
multiple
environmental
implications
newfound
hotspot.
Environmental Microbiology Reports,
Journal Year:
2024,
Volume and Issue:
16(2)
Published: March 5, 2024
Abstract
The
integrated
fixed‐film
activated
sludge
(IFAS)
process
is
considered
one
of
the
cutting‐edge
solutions
to
traditional
wastewater
treatment
challenges,
allowing
suspended
and
attached
biofilm
grow
in
same
system.
In
addition,
coupling
IFAS
with
anaerobic
ammonium
oxidation
(Anammox)
can
further
improve
efficiency
biological
denitrification.
This
paper
summarises
research
progress
coupled
anammox
process,
including
partial
nitrification
anammox,
simultaneous
denitrification,
denitrification
technologies,
describes
factors
that
limit
development
related
processes.
effects
dissolved
oxygen,
influent
carbon
source,
retention
time,
temperature,
microbial
community,
nitrite‐oxidising
bacteria
inhibition
methods
on
are
presented.
At
this
gives
an
outlook
future
focus
engineering
practice
direction
process.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: Nov. 28, 2024
Applying
anammox
to
municipal
wastewater
treatment
promises
enormous
energy
and
resource
savings;
however,
seasonally
cold
conditions
pose
a
considerable
challenge,
impeding
its
future
applications
towards
non-tropical
regions.
In
this
study,
we
establish
pilot-scale
plant
(50
m3/d)
in
northern
China
implement
the
partial
denitrification
coupling
process
on
actual
wastewater.
Despite
seasonal
cooling,
nitrogen
removal
efficiency
remains
high,
ranging
from
75.0
±
4.6%
at
27.8–20.0
°C
70.4
4.5%
10–7.5
°C.
This
exhibits
remarkable
low-temperature
tolerance,
achieving
an
in-situ
rate
of
32.7
4.7
g-N/(m3·d)
contributing
up
39.7
6.7%
removal.
Further
15N
stable
isotope
tracing
kinetic
tests
reveal
that
is
capable
supplying
increasingly
abundant
NO2-
with
decreasing
temperature,
enabling
robust
mainstream
against
cooling.
From
27.8
7.5
°C,
bacteria
not
only
survive
but
thrive
under
conditions,
absolute
relative
abundances
increasing
by
429.1%
343.5%,
respectively.
study
sheds
fresh
light
extending
regions,
taking
necessary
step
forward
toward
sustainability
goals
sector.
Low
temperatures
challenges
applying
sustainable
technology
Here,
authors
propose
conduct
evaluation,
offering
insights
into
colder
locations.
