Processes,
Journal Year:
2023,
Volume and Issue:
11(5), P. 1469 - 1469
Published: May 12, 2023
Constructed
wetlands
(CWs)
had
been
widely
used
to
treat
the
tailwater
from
sewage
treatment
plants.
However,
enduring
effectiveness
of
CWs
was
still
unclear.
Therefore,
this
study
aimed
investigate
chemical
oxygen
demand
(COD),
ammonia
nitrogen
(NH4+-N),
and
total
phosphorus
(TP)
removal
efficiencies
(RE)
Hongze
CW
(HZ-CW)
after
multi-years’
operation.
The
average
COD
RE
were
7.6%
15.14%
in
4th
5th
year,
respectively.
NH4+-N
78.33%
46.04%
respectively,
while
TP
remained
high
at
66.86%
64.68%.
high-throughput
sequencing
analysis
revealed
that
bacterial
community
HZ-CW
end
year
exhibited
a
substantial
abundance
diversity,
Proteobacteria
Bacteroidota
dominant
phyla
with
relative
33.75–71.8%
11.28–24.53%
different
zones
HZ-CW.
Ammonia
oxidizing
organisms
(AOMs)
presented
much
higher
(0.43–0.79%)
aerated
pond
(AP)
four
free
water
surface
flow
(FWS1–FWS4)
than
those
anammox
bacteria,
indicating
role
nitrification
removal.
IWA Publishing eBooks,
Journal Year:
2023,
Volume and Issue:
unknown, P. 15 - 36
Published: Sept. 12, 2023
Landfill
leachate
contamination
is
a
major
risk
to
natural
resources
and
public
health.
Sustainable
treatment
techniques
are
therefore
essential
protect
the
environment
living
beings’
Biological
processes
using
microorganisms
have
proven
be
successful
cost-effective
could
aerobic
or
anaerobic
processes.
In
particular,
involve
biodegradation
of
organic
nitrogenous
material
produce
CO2
sludge.
Aerobic
systems
shown
efficient
in
treating
young
medium-aged
leachates
but
limited
old
highly
loaded
leachates.
Among
different
processes,
ones
that
commonly
used
activated
sludge
process,
sequencing
batch
reactors,
aerated
lagoons,
those
including
suspended
biomass
growth
such
as
rotating
biological
contactors,
membrane
bioreactors,
biofilm
so
on.
This
chapter
discussed
most
adopted
from
findings
this
document,
it
was
deduced
effectiveness
each
technology
influenced
by
several
factors
characteristics,
process
variables,
even
site/area
which
implemented.
