Environmental Technology,
Journal Year:
2024,
Volume and Issue:
unknown, P. 1 - 16
Published: Dec. 3, 2024
Food
waste
digestate
(FWD),
which
contains
significant
levels
of
ammonium,
organic
matter,
and
salinity,
can
interfere
with
treatment
performance
the
anammox
process.
In
this
study,
a
two-stage
partial
nitritation/anammox
(PN/A)
process
was
established
to
investigate
nitrogen
removal
microbial
response
in
treating
FWD
at
loading
rate
(NLR)
0.27
±
0.02
gN/L/d.
High
concentrations
free
ammonia
(58
mg/L)
nitrous
acid
(0.3
facilitated
initiation
nitritation
(PN)
process,
achieving
an
average
NO2−/NH4+
ratio
1.28
0.08.
For
(NRR)
0.72
0.13
gN/L/d
achieved.
Free
(NH3)
stripping,
Anammox
pathway,
denitrification
pathway
contributed
4.1
0.3%,
5.1
0.2%,
84.0
1.5%
total
removal,
respectively.
Nitrosomonas,
salt-tolerant
ammonia-oxidizing
bacteria
(AOB),
enriched
1.0%,
while
Nitrospira,
nitrite-oxidizing
(NOB),
effectively
suppressed
0.003%.
The
genera
unclassified_f__Brocadiaceae
(13.9%)
Candidatus_Kuenenia
(4.8%)
dominated
pathway.
high
enrichment
ensured
stable
operation
0.62
0.11%
even
initial
FA
inhibition
concentration
40
mg/L.
Additionally,
norank_f_A4b
(1.34%)
norank_f_norank_o_SBR1031
(52.1%)
hydrolysis
refractory
matter.
Denitrifying
bacteria,
including
Hyphomicrobium,
Truepera,
unclassified_c__Alphaproteobacteria,
played
roles
nitrate
CODconsumed/NO3−removed
2.7
0.2.
This
study
highlights
application
PN/A
for
rapid
startup
effective
from
FWD.
Toxics,
Journal Year:
2025,
Volume and Issue:
13(4), P. 252 - 252
Published: March 28, 2025
Substantial
amounts
of
nitrogenous
(N)
compounds,
as
well
bisphenol
A
(BPA)
and
S
(BPS),
contribute
to
the
impurities
pharmaceutical
contamination
(PC)
in
wastewater,
which
have
detrimental
effects
on
environment,
humans,
aquaculture.
The
anammox
processes
is
primarily
used
treat
wastewater
contamination,
certain
microbial
communities
play
a
crucial
role.
In
this
regard,
present
study
focuses
functional
genes
involved
process.
Further,
current
highlights
secondary
(biological)
tertiary
(advanced)
methods;
these
techniques
are
more
effective
solutions
for
PC
treatment.
Anammox
bacteria
primary
drivers
wastewater's
ammonium
nitrite
removal
However,
overall,
25
species
been
recognized
between
five
important
genera,
including
Anammoxoglobus,
Anammoximicrobium,
Brocadia,
Kuenenia,
Jettenia,
mainly
found
activated
sludge
marine
environments.
group
called
has
that
encode
enzymes
such
hydrazine
synthase
(HZS),
dehydrogenase
(HDH),
oxidoreductase
reductase
(NIR),
hydroxylamine
(HAO),
monooxygenase
(AMO).
process
responsible
developing
about
30%
70%
N
gases
worldwide,
making
it
critical
component
nitrogen
cycle
well.
Therefore,
review
paper
also
investigates
pathways
hydrazine,
an
intermediate
process,
discusses
potential
way
significantly
decrease
N-compound
from
systems
environmental
determined
organic
contaminants
BPA
BPS.
