The
use
of
municipal
sludge,
as
a
seed
to
initiate
autotrophic
nitrogen
removal
(ANR)
process
is
challenging
because
the
abundance
anaerobic
ammonia-oxidizing
bacteria
(AnAOB)
negligible.
In
this
study,
high-height-diameter-ratio
airlift
inner-circulation
partition
bioreactor
(HHAIPBR)
was
operated
for
175
d
enrich
AnAOB
from
and
performance
ANR
investigated.
start-up
period
HHAIPBR
inoculated
with
sludge
required
approximately
69
d.
A
high
performance,
mean
TNRE
82.1%,
obtained
1
month.
computational
fluid
dynamics
model
used
simulate
volume
fraction
particle
velocity.
simulation
results
perfectly
validated
DO
distribution
characteristics
inside
reactor,
further
supporting
promotion
granulation
via
height-to-diameter
ratio.
Nitrosomonas
(3.31%)
Proteobacteria
Candidatus
Brocadia
(6.56%)
Planctomycetota
were
dominant
in
HHAIPBR.
This
study
presents
viable
approach
industrial
cultivation
anammox
rapid
PNA
system.
