Water,
Год журнала:
2024,
Номер
16(17), С. 2368 - 2368
Опубликована: Авг. 23, 2024
An
integrated
constructed
wetland-microbial
electrolysis
cell
(ICW-MEC)
system
was
investigated
for
nitrogen
removal
under
different
pollution
loads,
hydraulic
loads
(HLRs),
and
aeration
conditions.
The
treatment
performance
of
each
unit
the
microbial
community
characteristics
were
elucidated.
results
showed
that,
on
average,
80%
NH4+-N,
around
70%
nitrate
(NO3−-N),
total
(TN)
removed
by
three
with
less
influence
loads.
high
efficiencies
NH4+-N
(81.8%),
NO3−-N
(71.4%),
TN
(72.8%)
indicated
tolerable
to
HLRs.
intermittent
negatively
affected
removal,
while
increasing
removals
3.2–13.0%
3.7–16.7%.
contribution
secondary
NO3−-N,
TN,
organic
carbon
(TOC)
reached
47.4%,
55.0%,
45.9%,
38.8%,
respectively.
distinct
communities
existed
in
various
units
ICW-MEC
system,
which
strongly
environmental
factors
shaped
diverse
fillers
structures
system.
dominant
bacteria
contributed
efficient
exerted
their
advantages
ensure
stable
operation.
Water,
Год журнала:
2024,
Номер
16(20), С. 3003 - 3003
Опубликована: Окт. 21, 2024
The
traditional
model
of
centralized
wastewater
treatment
is
facing
substantial
strain
due
to
a
confluence
global
challenges.
Consequently,
it
imperative
evaluate
the
impediments
and
potential
advantages
associated
with
deployment
decentralized
(DW)
technologies
systems.
Decentralized
represents
sustainable
approach
managing
purifying
across
both
urban
rural
settings.
This
literature
review
provides
detailed
examination
current
advancements
challenges
DW
technologies.
It
specifically
addresses
their
operational
efficiency,
long-term
sustainability,
practical
implementation
diverse
environments.
critically
analyzes
recent
studies
that
highlight
innovative
methodologies,
including
constructed
wetlands,
anaerobic
digestion
processes,
predictive
models
enhanced
by
artificial
intelligence.
A
critical
focus
placed
on
ecological
economic
source
separation
resource
recovery
from
streams.
issue
emerging
contaminants,
such
as
microplastics,
antibiotics,
steroids,
also
discussed,
emphasizing
continued
need
for
innovation
in
Findings
various
life
cycle
assessments
are
presented
illustrate
environmental
impact
feasibility
systems
relative
alternatives.
comprehensive
analysis
offers
valuable
insights
into
future
trajectories
research
implementation.
The
lack
of
access
to
centralized
technologies
and
economic
resources
in
rural
communities
makes
wastewater
management
a
critical
challenge.
Decentralized
systems
such
as
constructed
wetlands
offer
sustainable
solutions
by
leveraging
natural
processes
for
effluent
treatment.
However,
their
success
sustainability
require
active
community
participation.
Currently,
there
is
little
evidence
involvement
the
implementation,
maintenance,
wetlands.
Existing
strategies
collaboration
environmental
sanitation
projects
were
analyzed
through
literature
review
covering
research
conducted
last
20
years.
Only
peer-reviewed
English
Spanish
was
considered.
Based
on
findings,
triple
helix
model
integrating
academia,
government,
society
proposed,
compiling
most
functional
from
initial
awareness
raising
maintenance
dissemination.
A
case
study
participation
presented
under
this
approach
Salvador
Díaz
Mirón
community,
Veracruz,
Mexico.
results
provide
key
information
effective
designed
manage
wetlands,
emphasizing
that
depends
both
technology
genuine
commitment
operation
long-term
sustainability.
Furthermore,
these
findings
can
serve
reference
decision-makers
project
planners
seeking
integrate
participatory
models
into
decentralized
water
resource
conservation.
ACS Omega,
Год журнала:
2025,
Номер
10(14), С. 13943 - 13953
Опубликована: Апрель 2, 2025
This
study
investigated
the
influence
of
hydraulic
retention
time
(HRT)
variation
and
presence
macrophytes
on
efficiency
two
pilot-scale
hybrid-constructed
wetlands
(HCWs)
treating
urban
streamwater
contaminated
with
nontreated
sanitary
sewage
contributions
from
surrounding
communities.
Each
HCW
comprises
a
vertical
unit
(VF)
horizontal
(HF)
filled
sand
gravel.
HCW-P
was
planted
withEichornia
crassipes
onto
filtering
media,
HCW-C
set
up
as
control
no
macrophytes.
The
novelty
this
consists
evaluating
combination
these
factors
(HRT
macrophytes)
in
operation
HCWs
for
removing
organic
matter
nutrients.
divided
into
step
I,
9
days
133
days,
II,
an
HRT
5
131
days.
Neither
(p-value
=
0.7691)
nor
0.0941)
influenced
COD
removal,
achieved
high
removal
efficiencies
(>87%)
during
operation.
higher
total
nitrogen
(TN)
steps
I
II
(56%
78%)
compared
to
(31%
48%)
operation,
demonstrating
improvement
TN
due
≤
0.05).
In
addition,
shorter
promoted
increase
22%
longer
enhanced
ammonia
(TAN)
(46%
88%)
than
(29%
72%)
respectively
Regarding
phosphorus
(TP),
63%
89%
69%
96%
confirming
TP
removal.
Finally,
demonstrated
adaptability
resilience
operational
conditions,
even
when
fixed
HCWs,
which
presented
robustness
nutrients
via
biofilm
assimilation
adsorption
under
variations.
International Journal of Environmental Health Research,
Год журнала:
2024,
Номер
35(2), С. 410 - 423
Опубликована: Май 24, 2024
The
generation
of
faecal
sludge
(FS)
in
capitals
and
urban
settings
African
countries
outpaces
the
available
storage,
emptying,
transportation
treatment
technologies.
low
technology-based
systems
for
handling
FS
are
preferable
widely
adopted
context
due
to
their
less
associated
investment
operation
costs.
waste
stabilization
ponds
constructed
wetlands
were
principally
developed
as
wastewater
however
they
treating
Africa.
Less
information
is
known
about
efficiency
these
lowering
pollutant
concentrations
meet
design
specifications
allowable
discharge
limits.
This
paper
reviewed
technical
efficacy
by
evaluating
actual
data
against
efficiencies
maximum
review
results
revealed
that
technologies
user-friendly
although
fail
lower
solids
failure
imposes
extra
costs
on
maintenance
fast
filling
hence
leading
short-circuiting
issues.
So,
studies
adequate
dewatering
before
entering
needed.
