Processes,
Journal Year:
2024,
Volume and Issue:
12(10), P. 2131 - 2131
Published: Sept. 30, 2024
Integrated
fixed-film
activated
sludge
(IFAS)
technology
greatly
enhances
nitrogen
removal
effectiveness
and
treatment
capacity
in
municipal
wastewater
plants,
addressing
the
issue
of
limited
land
availability.
Hence,
this
method
is
appropriate
for
treating
household
from
office
buildings.
The
research
was
conducted
at
plant
an
building
Ho
Chi
Minh
City,
Vietnam.
Experiments
were
to
ascertain
most
favorable
working
conditions,
including
hydraulic
retention
time
(HRT),
alkalinity
dosage,
dissolved
oxygen
(DO).
According
study,
IFAS
system
had
highest
when
operated
a
(HRT)
7
h,
dose
7.14
mgCaCO3/mgN-NH4+,
(DO)
value
6
mg/L.
nitrification
efficiency
ranges
89.2%
98.8%.
N-NO3−
concentration
post-treatment
within
range
27–45
mgN-NO3−/L,
which
lower
than
allowable
discharge
limit
60
mg/L
as
per
Vietnam’s
requirements.
findings
have
enhanced
management
process,
thereby
promoting
sustainable
growth
society.
Agronomy,
Journal Year:
2024,
Volume and Issue:
14(8), P. 1847 - 1847
Published: Aug. 21, 2024
Chemical
fertilizers
can
improve
crop
productivity,
but
irrational
fertilization
often
results
in
low
quality
and
yield,
poor
soil
fertility,
severe
environmental
pollution.
Nevertheless,
little
research
has
been
conducted
with
a
close
focus
on
the
cultivation
of
radish
high
mountain
regions,
widely
cultivated
root
vegetable
known
for
its
nutritional
value
economic
importance.
Here,
method
reducing
chemical
combined
application
organic
is
proposed
upon
studying
four
different
ratios
fertilizers,
including
control
(375
kg·ha−1
fertilizer
+
4500
fertilizer)
combinations
(T1:
12%
reduction
fertilizer;
T2:
20%
T3:
28%
fertilizer).
Their
effects
quality,
environment
were
investigated.
Compared
group,
T2
significantly
increased
yield
by
12.92%
improved
contents
vitamin
C,
soluble
sugars,
sulforaphane
solids,
titratable
acidity
roots
10.62%,
2.15%,
50.00%,
26.90%,
43.90%,
respectively.
The
nutrient
content
was
treatment,
7.69%
14.29%
increase
total
nitrogen
phosphorus
content,
respectively,
compared
control.
Moreover,
urease
activity,
sucrase
alkaline
phosphatase
catalase
activity
enhanced
showing
an
improvement
11.13%,
44.30%,
26.41%,
9.33%
control,
respectively
(p
<
0.05).
relative
abundance
beneficial
bacterial
phyla
such
as
Proteobacteria
Actinobacteria
potentially
helping
to
maintain
better
health
long-term
fertility.
In
summary,
promising
management
strategy
herein
unveiled
through
that
not
only
improves
also
optimizes
environment,
providing
effective
means
sustainable
production.
Water,
Journal Year:
2024,
Volume and Issue:
16(11), P. 1627 - 1627
Published: June 6, 2024
In
2023,
this
study
monitored
nine
types
of
antibiotics
in
the
influent
and
effluent
wastewater
treatment
plants
(WWTPs)
urban
suburban
areas
Tangshan.
The
total
concentration
detected
WWTPs
was
highest
winter,
followed
by
spring,
summer,
autumn.
higher
than
that
while
trend
reversed
Roxithromycin
oxytetracycline
had
a
risk
quotient
(RQ)
value
≥0.1
indicating
they
are
medium-risk
pose
to
aquatic
ecosystem
after
discharge.
area,
per
capita
pollution
load
autumn
for
sulfamethoxazole,
it
winter
ofloxacin.
use
roxithromycin,
ofloxacin
autumn,
respectively,
areas,
norfloxacin,
during
same
period.
area
one
order
magnitude
possible
overuse
environments.
Research Square (Research Square),
Journal Year:
2024,
Volume and Issue:
unknown
Published: June 24, 2024
Abstract
The
effects
of
plateau
solar
radiation
on
microbial
abundance
and
diversity
metabolism
during
the
formal
operation
A2O
reactor
were
analyzed
by
running
three
parallel
units
with
radiation,
constant
temperature
room
laterally.
results
showed
that
when
reached
180th
day,
nitrogen
removal
effect
decreased
significantly
compared
in
general;
number
operational
taxonomic
(OTUs)
systems
1140,
972
1000,
an
increasing
trend
throughout
whole
process,
metabolic
function
dominant
genera
microorganisms
was
dominated
organic
matter
degradation,
denitrification
denitrogenation,
pathways
carbon
metabolism,
it
also
found
relative
denitrifying
bacteria
(DNB)
increased
increase
duration
exposure.
bacterial
system
lower
than
up
to
90
days,
some
common
sludge
suppressed
but
denitrification-related
their
functional
genes
instead
strengthened
reactor.
