This
study
aimed
to
elucidate
the
influence
of
different
wastewater
qualities
on
operational
performance,
microbial
community
dynamics,
and
changes
in
expression
nitrogen
removal-related
functional
genes
during
biofilm
formation
a
novel
Moving
Bed
Biofilm
Reactor
(MBBR)
(a
pilot-scale
3
m3)
reactor
startup
with
Heterotrophic
Nitrification-Aerobic
Denitrification
(HN-AD)
bacteria
inoculation.
It
was
observed
that
for
real
occurred
30
days
faster
than
simulated
wastewater,
achieved
within
only
45
days.
Additionally,
average
removal
rates
NH4+-N
TN
were
16.24%
14.90%
higher,
respectively.
Microbial
analysis
revealed
relative
abundances
Thauera
Zoogloea
carriers
9.26%
14.09%
respectively,
making
them
key
genera
contributing
enhanced
compared
wastewater.
Further
abundance
napA
napB
showed
an
increase
0.40%
confirming
pivotal
role
AD
processes.
The
HN-AD
pathway
MBBR
inferred
as
NH4+→NH2OH→NO2-→NO3-→NO2-→NO→N2O→N2.
efficient
high-ammonia
pollutants
using
system,
providing
engineering
application
guidance
treatment
industrial
inoculating
into
(HNAD-MBBR).
Environmental Technology,
Journal Year:
2024,
Volume and Issue:
unknown, P. 1 - 11
Published: Sept. 5, 2024
Although
anaerobic
ammonia
oxidation
(anammox)
is
considered
a
promising
process
due
to
its
high
efficiency
and
low
energy
in
nitrogen
removal,
nitrite
inadequacy
was
one
of
the
bottlenecks
for
application
anammox.
However,
endogenous
partial
denitrification
(EPD)
has
been
emerging
as
stable
pathway
provide
Furthermore,
denitrifying
glycogen-accumulating
organisms
(DGAOs)
are
believed
be
associated
with
EPD.
In
this
study,
firstly,
GAOs
were
gradually
enriched
sequencing
batch
reactor
(SBR)
dual
strategy
influent
phosphorus
limitation
withdrawal
after
stage.
DGAOs
successfully
induced
by
adding
sodium
nitrate
solution
at
end
stage,
resulting
NO
