Water Research,
Journal Year:
2025,
Volume and Issue:
276, P. 123255 - 123255
Published: Feb. 9, 2025
Methane
fermentation
is
critical
for
food-waste
management;
however,
effective
treatment
of
its
high-ammonium
dewatering
liquid
remains
a
major
challenge.
Anammox,
promising
candidate
treatment,
requires
pretreatment,
such
as
partial
nitrification
(PN),
to
reduce
ammonium
and
generate
sufficient
nitrite
optimize
efficiency.
In
this
study,
an
airlift
reactor
was
employed
process
the
from
methane
fermentation.
Stable
operation
over
360
days
demonstrated
feasibility
under
high-load
conditions.
By
implementing
precise
aeration
control
strategy
stabilize
removal
efficiency
(ARE
=
50.2-57.1
%),
detailed
summary
optimal
operational
parameter
ranges
(consumed
inorganic
carbon
[ΔIC]
1000-1160
mg
C/L,
effluent
[Eff.]
IC
282-378
pH
8.05-8.17,
Eff.
Alkalinity
1000-1350
CaCO3/L,
free
ammonia
61.9-82.5
mg/L,
nitrous
acid
47.6-71.1
μg/L)
were
provided
ideal
NO2⁻/NH4⁺
ratio
1.1-1.3.
Additionally,
variations
in
oxidizing
bacteria
activity
with
temperature
analyzed
by
Arrhenius,
cardinal
model
inflection,
Haldane
models,
R2
values
0.998,
0.975,
0.999,
respectively.
Results
suggest
that
conditions
identified
range
20-40
°C
7.5-8.5.
Microbial
sequencing
reveals
Nitrosomonas
markedly
enriched
during
operation,
abundance
rising
3.67
%
9.76
NLR
increased.
Notably,
NOB
nearly
undetectable
throughout
entire
process.
advanced
aeration-based
mechanism
positive
feedback
loop
proposed,
which
allows
PN
effectively
treat
high-ammonia
liquid,
thereby
providing
suitable
influent
subsequent
anammox
offering
crucial
theoretical
insights
future
controlling
pilot-scale
system
operation.
Microbes and Environments,
Journal Year:
2022,
Volume and Issue:
37(3), P. n/a - n/a
Published: Jan. 1, 2022
Patescibacteria
are
widely
distributed
in
various
environments
and
often
detected
activated
sludge.
However,
limited
information
is
currently
available
on
their
phylogeny,
morphology,
ecophysiological
role
sludge
or
interactions
with
other
microorganisms.
In
the
present
study,
we
identified
microorganisms
that
interacted
via
a
correlation
ana-lysis
using
16S
rRNA
gene,
predicted
metabolic
potential
of
metagenomic
ana-lysis.
The
metagenome-assembled
genomes
consisted
three
Saccharimonadia,
Parcubacteria,
one
Gracilibacteria,
showed
strong
positive
relative
abundance
Chitinophagales.
Metabolic
predictions
from
ten
recovered
patescibacterial
five
Chitinophagales
supported
mutualistic
between
member
Saccharimonadia
N-acetylglucosamine,
Parcubacteria
nitrogen
compounds
related
to
denitrification,
Gracilibacteria
phospholipids
results
indicate
important
for
survival
ecosystems.
Water Research X,
Journal Year:
2023,
Volume and Issue:
20, P. 100196 - 100196
Published: Aug. 13, 2023
Deciphering
unclear
microbial
interactions
is
key
to
improving
biological
wastewater
treatment
processes.
Microbial
predation
and
parasitism
in
ecosystems
are
unexplored
survival
strategies
that
have
long
been
known
recently
attracted
attention
because
these
interspecies
may
contribute
the
reduction
of
excess
sludge.
Here,
community
profiling
600
activated
sludge
samples
taken
from
six
industrial
one
municipal
processes
(WWTPs)
was
conducted.
To
identify
shared
lineages
WWTPs,
constituents
were
defined
as
family
level
taxa
had
≥
0.1%
average
relative
abundance
detected
all
The
analysis
assigned
106
families
WWTPs.
Correlation
showed
98
significantly
correlated
with
total
carbon
(TC)
and/or
nitrogen
(TN)
concentrations,
suggesting
they
remediation.
Most
possible
predatory
or
parasitic
bacteria
belonging
phyla
Bdellovibrionota,
Myxococcota,
Candidatus
Patescibacteria
found
be
negatively
TC/TN;
thus,
frequently
present
WWTPs
could
involved
removal
carbon/nitrogen
derived
cell
components.
Shotgun
metagenome-resolved
metabolic
reconstructions
indicated
gene
homologs
associated
conserved
Ca.
genomes
(e.g.,
host
interaction
(hit)
locus,
Tad-like
secretion
complexes,
type
IV
pilus
assembly
proteins).
This
study
provides
insights
into
complex
potentially
linked
biomass
