Heterotrophic nitrification processes driven by glucose and sodium acetate: New insights into microbial communities, functional genes and nitrogen metabolism from metagenomics and metabolomics
Jingang Hu,
Jiao-Yang Tian,
Xiangyi Deng
и другие.
Bioresource Technology,
Год журнала:
2024,
Номер
408, С. 131226 - 131226
Опубликована: Авг. 6, 2024
Язык: Английский
Gradient Dissolved Oxygen Created by Limited Aeration Triggers Ammonia Assimilation: Insight into Efficient Nitrogen Removal with Nutrient Harvest
Опубликована: Янв. 1, 2025
Currently,
the
mainstream
ammonia
nitrogen
(NH4+-N)
removal
underwent
transformation
of
intermediate
nitrogen,
which
necessitated
an
intricate
assembly
multiple
biochemical
units
with
varying
dissolved
oxygen
(DO)
settings,
even
causing
greenhouse
effect.
Ammonia
assimilation
could
directly
convert
nutrient
into
cell
components
via
microbial
capture.
However,
induction
mechanism
remained
unclear.
Herein,
we
constructed
biological
system
induced
by
synergy
limited
aeration
and
external
carbon
source.
Total
(TN)
NH4+-N
in
both
batch
continuous
flow
reactors
improved
stepwise
influent
to
(C/N)
ratio.
Under
C/N
ratio
7.8-8.1
reactor,
efficiencies
TN,
total
phosphorus
achieved
88.63%,
92.28%
100%,
respectively.
Combined
kinetics,
simultaneous
trends
source
consumption
confirmed
occurrence
assimilation.
DO
gradient
formed
significantly
suppressed
nitrobacteria,
while
further
facilitated
The
production
α-ketoglutaric
acid,
extra-
intra-cellular
proteins
verified
conversion
towards
organic
nitrogen.
Nitrogen
balance
showcased
that
TN
efficiency
79.60%
under
7.8-8.1,
accompanied
80.82%
External
was
conducive
enriching
dominant
bacteria
related
during
aeration.
functional
genes
(gdhA,
glnA
gltB)
encoding
also
increased
abundance.
had
a
potential
for
non-redox
sludge
resource
utilization
through
harvest.
Язык: Английский
Indigenous bacterial adaptation and survival: Exploring the shifts in highly compacted bentonite over a 5-year long-term study for nuclear repository purposes
Journal of Hazardous Materials,
Год журнала:
2025,
Номер
489, С. 137526 - 137526
Опубликована: Фев. 7, 2025
Язык: Английский
Sulfur cycle process accelerates microbial fuel cells driven denitrification system: Low sulfate yield and enrichment of functional microorganisms
Bioresource Technology,
Год журнала:
2025,
Номер
unknown, С. 132432 - 132432
Опубликована: Март 1, 2025
Язык: Английский
Anaerobic treatment of refractory industrial organic wastewater: A review of bioenergy recovery and low-carbon nitrogen removal toward carbon neutrality
Journal of Water Process Engineering,
Год журнала:
2025,
Номер
72, С. 107515 - 107515
Опубликована: Март 23, 2025
Язык: Английский
Comprehensive revealing the destructive effect and inhibitory mechanism of oxytetracycline on aerobic denitrification bacteria Acinetobacter sp. AD1 based on cell state, electron behavior and intracellular environment.
Journal of Hazardous Materials,
Год журнала:
2025,
Номер
unknown, С. 138058 - 138058
Опубликована: Март 1, 2025
Язык: Английский
Comparison of the start-up of rotating biofilm contactor reactor with HN-AD bacteria inoculation under high and low influent ammonia conditions
Journal of Environmental Management,
Год журнала:
2025,
Номер
381, С. 125206 - 125206
Опубликована: Апрель 9, 2025
Язык: Английский
Vanadium Stress-Driven Microbial Acclimation Enhances Biological Denitrification in Recycling of Vanadium-Containing Industrial Wastewater
Microorganisms,
Год журнала:
2025,
Номер
13(5), С. 1003 - 1003
Опубликована: Апрель 27, 2025
Recirculation
in
vanadium
mining
enhances
resource
efficiency
but
risks
ammonia
nitrogen
(NH3-N)
accumulation,
severely
compromising
leaching
yields.
To
address
this
bottleneck,
we
developed
a
bioaugmentation
strategy
using
Pseudomonas
sp.
S.P-1
acclimated
to
stress.
Under
optimized
conditions
(sodium
citrate
as
carbon
source,
C/N
=
5,
5%
inoculum,
and
pH
8),
the
strain
achieved
exceptional
NH3-N
(2000
mg·L−1)
removal
(>99.25%
within
16
days;
residual
NH4+
<
15
mg·L−1),
12.7%
higher
than
original
bacteria.
Mechanistic
studies
revealed
that
exposure
triggered
dual
adaptive
responses:
enhanced
biosorption
via
stimulated
synthesis
of
extracellular
polymeric
substances
(EPS)
enriched
with
negatively
charged
functional
groups
(C=O,
-COOH-,
C-N),
improving
adsorption
capacity,
metabolic
activation
an
elevated
transmembrane
electrochemical
potential
accelerated
substrate
uptake
due
cell
membrane
permeability,
while
up-regulation
monooxygenase
(AMO)
activity
(123.11%)
facilitated
efficient
NH4+→NH2OH
conversions.
Crucially,
bio-process
enabled
simultaneous
degradation
(89.2%
efficiency)
recovery,
demonstrating
its
role
pollution
control
critical
metal
recycling.
By
integrating
microbial
resilience
circular
economy
principles,
our
offers
scalable
prototype
for
sustainable
extraction,
aligning
low-carbon
metallurgy
demands
clean
energy
transitions.
This
study
investigated
ability
stress
enhance
metabolism,
by
acclimatizing
vanadium-containing
solutions,
aimed
problems
accumulation
toxicity
wastewater
recirculation.
Язык: Английский
Impacts of O2:CH4 ratios and CH4 concentrations on the denitrification and CH4 oxidations of a novel AME-AD system
Environmental Research,
Год журнала:
2024,
Номер
262, С. 119866 - 119866
Опубликована: Авг. 30, 2024
Язык: Английский
A new strategy for greenhouse gas emission reduction in the anaerobic/anoxic/oxic biological treatment process using exogenous N-acyl-homoserine lactones, a quorum-sensing signaling molecules
Water Science & Technology,
Год журнала:
2024,
Номер
90(10), С. 2764 - 2783
Опубликована: Ноя. 11, 2024
ABSTRACT
In
this
study,
the
impact
of
exogenous
N-acyl-homoserine
lactones
(AHLs)
on
greenhouse
gas
(GHG)
emissions
in
anaerobic/anoxic/oxic
(A/A/O)
systems
was
analyzed
by
manipulating
type
and
dosage
AHLs.
The
mechanism
behind
AHLs’
effects
GHG
explored
through
changes
microbial
community
structure.
Findings
revealed
that
N-octanoyl-homoserine
lactone
(C8-HSL)
high-dose
N-dodecanoyl-homoserine
(C12-HSL)
increased
emissions,
while
low-dose
C12-HSL
decreased
them.
Moreover,
C8-HSL
promoted
methane
(CH4)
nitrous
oxide
(N2O)
production
affecting
sludge
particle
size.
Bacterial
analysis
highlighted
Acinetobacter
Flavobacterium's
roles
N2O
acetate
methanogens
synthesis.
Metabolic
pathway
showed
acetic
acid
(CH3COOH)
methanogenic
main
pathway;
influenced
emission
changing
reductase
(Nos)
abundance.
This
research
underscores
AHL-based
quorum
sensing's
potential
mitigating
during
activated
wastewater
treatment,
offering
insights
into
their
application
key
activities.
Limitations
include
absence
reduction
signaling
molecules
need
for
further
investigation
accumulation.
Язык: Английский