Frontiers in Marine Science,
Journal Year:
2023,
Volume and Issue:
10
Published: May 12, 2023
Ultraviolet
disinfection
is
an
important
method
for
controlling
the
large-scale
outbreaks
of
diseases
in
aquaculture.
As
a
novel
and
promising
light
source,
ultraviolet
light-emitting
diode
(UV-LED)
has
advantages
safety,
high
efficiency
no
environmental
pollution
risks.
However,
it
remains
unclear
whether
UV-LEDs
can
replace
traditional
UV
sources
aquaculture
water
treatment
processes.
Present
study
aimed
to
investigate
efficacy
UVC-LEDs
(265
nm)
on
pathogenic
bacteria,
specifically
Aeromonas
salmonicida
Escherichia
coli
.
The
effects
UVC-LED
dose,
conditions,
temperature
bacterial
reactivation
were
also
investigated.
results
showed
that
exposure
effectively
inactivated
both
types
bacteria.
To
achieve
4.5-log
inactivation
A.
E.
,
24
mJ/cm
2
28
irradiation
required,
rate
increased
with
increasing
fluence.
Both
revived
after
disinfection,
photoreactivation
was
significantly
higher
than
dark
reactivation.
Bacterial
due
high-dose
lower
low-dose.
After
72
h
reactivation,
rates
1
±
0.4%
2.2
0.2%for
0.02%
0%
respectively.
Besides,
two
bacteria
exhibited
different
correlations
temperature.
highest
68.7
4%
at
20°C,
while
53.98
2.9%
15°C
48
h.
This
reveals
rapid
efficient
by
UVC-LED,
elucidates
mechanism
influencing
factors
UVC-LED.
highlights
adequate
avoidance
visible
inhibit
Our
findings
form
reference
design
operation
Frontiers in Marine Science,
Journal Year:
2023,
Volume and Issue:
10
Published: May 12, 2023
Ultraviolet
disinfection
is
an
important
method
for
controlling
the
large-scale
outbreaks
of
diseases
in
aquaculture.
As
a
novel
and
promising
light
source,
ultraviolet
light-emitting
diode
(UV-LED)
has
advantages
safety,
high
efficiency
no
environmental
pollution
risks.
However,
it
remains
unclear
whether
UV-LEDs
can
replace
traditional
UV
sources
aquaculture
water
treatment
processes.
Present
study
aimed
to
investigate
efficacy
UVC-LEDs
(265
nm)
on
pathogenic
bacteria,
specifically
Aeromonas
salmonicida
Escherichia
coli
.
The
effects
UVC-LED
dose,
conditions,
temperature
bacterial
reactivation
were
also
investigated.
results
showed
that
exposure
effectively
inactivated
both
types
bacteria.
To
achieve
4.5-log
inactivation
A.
E.
,
24
mJ/cm
2
28
irradiation
required,
rate
increased
with
increasing
fluence.
Both
revived
after
disinfection,
photoreactivation
was
significantly
higher
than
dark
reactivation.
Bacterial
due
high-dose
lower
low-dose.
After
72
h
reactivation,
rates
1
±
0.4%
2.2
0.2%for
0.02%
0%
respectively.
Besides,
two
bacteria
exhibited
different
correlations
temperature.
highest
68.7
4%
at
20°C,
while
53.98
2.9%
15°C
48
h.
This
reveals
rapid
efficient
by
UVC-LED,
elucidates
mechanism
influencing
factors
UVC-LED.
highlights
adequate
avoidance
visible
inhibit
Our
findings
form
reference
design
operation
