A Novel AOA-SNDPRr Process for Simultaneous Wastewater Treatment, Phosphorus Recovery, and In Situ Sludge Reduction with Ultralong Sludge Retention Time
Qiulai He,
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Jinfeng Li,
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Meng Wang
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et al.
ACS ES&T Engineering,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 4, 2025
Successive
side-stream
phosphorus
recovery
challenges
the
stable
enhanced
biological
(P)
removal
process
due
to
stripping
of
P
from
sludge.
In
this
study,
a
novel
anaerobic/oxic/anoxic
simultaneous
nitrification,
denitrification,
and
integrating
(AOA-SNDPRr)
was
proposed
operated
under
ultralong
sludge
retention
time
(SRT,
120–140
d).
Results
showed
that
effective
carbon,
nitrogen,
obtained.
High
contents
within
(15–30
mg
P/g
MLSS)
were
kept
even
after
an
80
day
continuous
extraction,
thus
supporting
considerable
anaerobic
concentrations
(10–30
mg/L).
Up
81.60%
influent
harvested,
in
situ
reduction
by
63.2%
with
low
observed
yield
(Yobs)
0.015
g
MLSS/g
chemical
oxygen
demand
50%
extraction
ratio.
Interestingly,
long-time
operation
witnessed
spontaneous
granulation.
Abundant
extracellular
polymeric
substances
(EPS),
particularly
viscous
polysaccharides
(PS),
stimulated.
A
16S
rDNA
sequence
demonstrated
overwhelmingly
dominated
Candidatus_Competibacter
soared
20.18%–25.91%
without
deteriorating
removal.
Negligible
impact
on
functional
genes
for
poly-P/Gly
synthesis
decomposition
found.
Overall,
AOA-SNDPRr
long
SRT
proved
be
sustainable
approach
targeting
three
goals
reliable
wastewater
treatment,
efficient
recovery,
dramatic
minimization.
Language: Английский
Deciphering spatial microbial distribution in aerobic Granules: Linking granulation dynamics to nitrogen metabolism in the continuous flow Self-Circulating reactor
Chemical Engineering Journal,
Journal Year:
2025,
Volume and Issue:
unknown, P. 163111 - 163111
Published: April 1, 2025
Language: Английский
Effects of dissolved oxygen on the anaerobic/oxic/anoxic simultaneous nitrification, denitrification and phosphorus removal (AOA-SNDPR) process for advanced wastewater treatment and in situ sludge reduction
Journal of environmental chemical engineering,
Journal Year:
2024,
Volume and Issue:
unknown, P. 115258 - 115258
Published: Dec. 1, 2024
Language: Английский