ACS ES&T Water,
Год журнала:
2024,
Номер
4(7), С. 2906 - 2917
Опубликована: Июнь 11, 2024
Understanding
the
urban
wash-off
process
of
road-deposited
sediment
(RDS)
is
essential
for
controlling
nonpoint
source
(NPS)
pollution
and
restoring
water
environment.
However,
most
existing
models
neglect
impact
RDS
particle
size,
resulting
in
poor
simulation
peak
total
suspended
solid
(TSS)
concentration.
This
study
conducted
physical
experiments
developed
an
hydro-sediment
model
based
on
cellular
automata
(UHSCA)
to
investigate
size
process.
Our
findings
reveal
that
exhibits
varying
effects
under
different
rainfall
events.
The
proposed
UHSCA
model,
utilizing
a
multiple-particle
approach,
more
accurately
captures
TSS
(TSSpeak)
concentration
compared
conventional
single-particle
approach;
relative
error
TSSpeak
decreased
by
approximately
26%,
Nash–Sutcliffe
efficiency
increased
22%
light
moderate
These
provide
extended
knowledge
effective
tools
understanding
spatiotemporal
dynamics
NPS
pollution,
significantly
aiding
design
methods
finely
intercepting
treating
load
from
initial
runoff.
In
the
face
of
increasing
discharge
standards,
sulfur
autotrophic
denitrification
(SAD)
is
gradually
applied
for
deep
nitrogen
removal
electron
donor
deficient
waters.
However,
product
sulfate
induces
secondary
pollution
in
effluent,
and
proton
consumption
alkalinity
detrimental
to
stable
operation
system.
this
study,
a
coupled
with
microbial
electrochemical
system
(S-MED)
proposed
reduce
addition
inorganic
alleviate
nitrite
accumulation,
while
making
self-sustaining
at
neutral
pH.The
coupling
was
operated
under
potential
-0.5
V.
The
S-MED
achieved
nitrate
97.5
±
1.57%
total
90.3
4.27%,
which
were
14.6%
68.0%
higher
than
SAD
systems
control
S/N
molar
ratio
0.8.
accumulation
rate
reduced
by
69.1%
compared
SAD.
effluent
concentration
also
5.8
mg/mg-N
TN
removal.
electrochemically
active
denitrifying
bacterium
Thiobacillus
enriched
system,
copy
numbers
functional
genes
narG/H/I,
napA/B,
nirK
involved
increased.
According
analysis
characteristics,
it
suggested
that
S2-
might
be
generated
from
presence
electrodes,
enabling
cycling
sulfur,
providing
mobile
carriers
denitrification,
thus
allowing
bacteria
conduct
indirectly
obtaining
electrons
electrode.
Water,
Год журнала:
2025,
Номер
17(4), С. 485 - 485
Опубликована: Фев. 8, 2025
Carbon
source
limitation
is
a
critical
factor
restricting
the
treatment
efficiency
of
domestic
wastewater
by
algae–bacteria
consortia.
Using
agricultural
waste
as
an
external
carbon
to
enhance
purification
performance
holds
significant
potential.
This
study
investigated
effects
peanut
shell
powder
(PSP)
on
in
The
results
demonstrated
that
optimal
PSP
dosage
(2
mg/L)
improved
removal
efficiencies
TN,
TP,
and
COD
29.6%,
40.9%,
18.7%,
respectively.
In
contrast,
excessive
reduced
performance.
primary
mechanism
which
influenced
consortia
involved
changes
microbial
biomass
community
structure.
An
promoted
proliferation
dominant
algal
species,
Chlorella,
enhanced
photosynthetic
activity,
increased
relative
abundance
Rhodanobacter,
known
for
its
effective
degradation
benzene
compounds.
Conversely,
caused
cell
rupture,
inhibited
Chlorella
growth
photosynthesis,
elevated
Microcystis
Brevundimonas,
pose
health
risks.
conclusion,
can
improve
effluent
quality
safety
consortia,
represents
green,
economical
pathway
optimizing
processes.
