Coupling
partial
denitrification
and
anammox
(PD/A)
is
a
promising
technology
for
deep-level
nitrogen
removal,
the
quickly
effective
startup
remains
huge
challenge
in
real
application.
In
this
study,
stability
of
nitrite
(NO2--N)
accumulation
performance
response
to
loading
rate
(NLR)
were
investigated
two
independent
sequential
batch
reactors
(PSBR
ASBR),
combined
PD/A
operation
was
subsequently
carried
out
based
on
optimal
operating
conditions.
PSBR,
nitrate
removal
efficiency
(NRE)
maintained
around
89%
-
90%
with
mean
nitrate-to-nitrite
transformation
ratio
(NTR)
84.43%,
total
proportion
functional
bacteria
(e.g.,
Terrimonas,
norank_f_A4b,
Ellin6067,
Defluviicoccus,
etc)
accounted
40.98%
after
long-term
acclimation.
ASBR,
increased
NLR
(0.22
→
0.70
kgN/(m3·d))
depressed
activity
owing
sludge
disintegration
adverse
contribution,
however,
dominant
Candidatus_Brocadiaenriching
from
0.50%
2.05%
realized
efficient
retention
bacteria,
which
also
laid
good
foundation
rapid
process.
As
controlled
0.18
0.25
kgN/(m3·d),
(ReTN)
climbed
33.88%
98%
contribution
soaring
up
65%,
since
higher
tight-bound
extracellular
polymeric
substances
(T-EPS)
production
protein/polysaccharide
(PN/PS)
accelerated
re-formation
granular
sludge.
end,
potential
significances
challenges
process
further
summarized
mainstream
wastewater
treatment.
Microorganisms,
Journal Year:
2023,
Volume and Issue:
11(8), P. 2003 - 2003
Published: Aug. 3, 2023
Plant
roots
host
numerous
microorganisms
around
and
inside
their
roots,
forming
a
community
known
as
the
root
microbiome.
An
increasing
bulk
of
research
is
underlining
influences
root-associated
microbial
communities
can
have
on
plant
health
development.
However,
knowledge
how
associated
microbes
interact
to
bring
about
crop
growth
yield
limited.
Here,
we
presented
(i)
communication
strategies
between
(ii)
applications
in
enhancing
yield.
This
review
has
been
divided
into
three
main
sections:
communications
microbiome
root;
mechanism
employed
by
microbes;
chemical
mechanisms
plants
application
Understanding
communicate
vital
designing
ecofriendly
for
targeted
disease
suppression
improved
that
will
help
sustainable
agriculture.
Ensuring
become
healthy
productive
entails
keeping
under
surveillance
recognize
disease-causing
similarly
exploit
services
beneficial
nutrient
acquisition,
stress
mitigation,
promotion.
Environmental Science & Technology,
Journal Year:
2023,
Volume and Issue:
57(29), P. 10721 - 10732
Published: July 11, 2023
The
widely
used
biofilm
process
in
advanced
wastewater
treatment
is
currently
challenged
by
numerous
exotic
emerging
pollutants
(EPs),
and
the
underlying
principle
of
challenge
adaptive
evolution
laws
under
EP
stress.
However,
there
still
a
knowledge
gap
exploration
theory.
Herein,
we
comprehensively
analyzed
morphological
variation,
community
succession,
assembly
mechanism
biofilms
to
report
their
sulfamethoxazole
carbamazepine
stress
for
first
time.
ecological
role
dominant
species
was
driven
as
pioneer
hub
stress,
deterministic
processes
indicated
functional
basis
transformation.
In
addition,
characteristic
responses
dispersal
limitation
homogenizing
adequately
revealed
pathways
resulting
structural
variation.
Therefore,
"interfacial
exposure-structural
variation-mass
transfer
feedback"
inferred
underly
biofilms.
Overall,
this
study
highlighted
internal
drivers
at
phylogenetic
level
deepened
our
understanding
development
purification.
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.
