Environmental Science & Technology,
Journal Year:
2024,
Volume and Issue:
58(24), P. 10632 - 10643
Published: May 31, 2024
The
feasibility
of
a
synergistic
endogenous
partial
denitrification-phosphorus
removal
coupled
anammox
(SEPD-PR/A)
system
was
investigated
in
modified
anaerobic
baffled
reactor
(mABR)
for
synchronous
carbon,
nitrogen,
and
phosphorus
removal.
mABR
comprising
four
identical
compartments
(i.e.,
C1–C4)
inoculated
with
precultured
denitrifying
glycogen-accumulating
organisms
(DGAOs),
polyphosphate-accumulating
organisms,
bacteria.
After
136
days
operation,
the
chemical
oxygen
demand
(COD),
total
efficiencies
reached
88.6
±
1.0,
97.2
1.5,
89.1
4.2%,
respectively.
Network-based
analysis
revealed
that
biofilmed
community
demonstrated
stable
nutrient
performance
under
oligotrophic
conditions
C4.
metagenome-assembled
genomes
(MAGs)
such
as
MAG106,
MAG127,
MAG52,
MAG37
annotated
phosphorus-accumulating
(DPAOs)
MAG146
DGAO
were
dominated
C1
C2
contributed
to
89.2%
COD
consumption.
MAG54
MAG16
Candidatus_Brocadia
(total
relative
abundance
16.5%
C3
4.3%
C4)
responsible
74.4%
nitrogen
through
anammox-mediated
pathway.
Functional
gene
based
on
metagenomic
sequencing
confirmed
different
capable
performing
distinct
functions
specific
advantageous
microbial
groups,
facilitating
targeted
Additionally,
conditions,
activity
bacteria-related
genes
hzs
higher
compared
hdh.
Thus,
an
innovative
method
treatment
low-strength
municipal
nitrate-containing
wastewaters
without
aeration
presented,
mediated
by
process
less
land
area
excellent
quality
effluent.
