There
is
scarcity
of
data
on
methane
(CH4)
concentration
levels
and
other
gas
compositions
around
animals
in
commercial
cattle
barns,
especially
for
developing
technology
gaseous
CH4
treatment.
Consequently,
use
biofiltration
catalytic
combustion
strategies
as
alternative
enteric
mitigation
techniques
remain
concepts
yet
to
be
validated
real
barns.
One
the
major
barriers
implementing
these
that
they
require
close
buildings,
which
not
case
most
Open
barns
are
frequently
associated
with
excessive
ventilation,
resulting
low
concentrations,
can
reduce
cost
effectiveness
treatment
techniques.
With
development
low-cost,
low-CH4-concentration
enrichment
technologies
still
their
infancy,
local
ventilation
systems
at
animal
level
capable
collecting
breath
from
cows
prior
air
mixing
could
an
option.
Therefore,
effect
a
cubicle
hood
system
(CHS)
different
extraction
increasing
concentrations
lying
area
were
evaluated
natural
mechanically
ventilated
dairy
buildings
during
winter
Norway.
In
both
CHS
increased
by
14-25%
compared
without
CHS.
The
results
obtained
depended
height
floor
outdoor
temperature
exchange
rate
naturally
barn,
hourly
mean
under
ranged
14-225
ppm,
31-322
ppm
building.
Microbiology Research,
Journal Year:
2024,
Volume and Issue:
15(2), P. 634 - 654
Published: April 25, 2024
Methanotrophy
is
a
biological
process
that
effectively
reduces
global
methane
emissions
by
utilizing
microorganisms
can
utilize
as
source
of
energy
under
both
oxic
and
anoxic
conditions,
using
variety
different
electron
acceptors.
Methanotrophic
microbes,
which
their
primary
carbon
energy,
are
found
in
various
environments,
such
soil,
sediments,
freshwater,
marine
ecosystems.
These
microbes
play
significant
role
the
cycle
consuming
methane,
potent
greenhouse
gas,
converting
it
into
dioxide,
less
harmful.
However,
known
to
be
contributor
ozone
formation
considered
major
gas.
Methane
alone
contributes
30%
warming;
its
increased
over
32%
last
three
decades
thus
affect
humans,
animals,
vegetation
adversely.
There
sources
emissions,
like
agricultural
activities,
wastewater
management,
landfills,
coal
mining,
wetlands,
certain
industrial
processes.
In
view
adverse
effects
urgent
measures
required
reduce
emissions.
Methanotrophs
have
attracted
attention
multifunctional
bacteria
with
potential
applications
mitigation
environmental
bioremediation.
roles
biogeochemical
cycles
oxidizing
coupled
reduction
Methanotrophy,
natural
converts
presents
promising
solution
mitigate
impact
on
climate
change.
Nonetheless,
additional
research
necessary
enhance
expand
these
approaches
for
extensive
use.
this
review,
we
summarize
key
strategies,
microbial
aspects,
application
methanotrophs
sinks
increasing
anthropogenic
Methane,
Journal Year:
2024,
Volume and Issue:
3(1), P. 122 - 148
Published: Feb. 21, 2024
The
ongoing
yearly
rise
in
worldwide
methane
(CH4)
emissions
is
mostly
due
to
human
activities.
Nevertheless,
since
over
half
of
these
are
scattered
and
have
a
concentration
less
than
3%
(v/v),
traditional
physical–chemical
methods
not
very
effective
reducing
them.
In
this
context,
biotechnologies
like
biofiltration
using
methane-consuming
bacteria,
also
known
as
methanotrophs,
offer
cost-efficient
practical
approach
addressing
diffuse
CH4
emissions.
present
review
describes
recent
findings
processes
one
the
earliest
for
treating
polluted
air.
Specifically,
impacts
biotic
(such
cooperation
between
methanotrophs
non-methanotrophic
bacteria
fungi)
abiotic
factors
temperature,
salinity,
moisture)
that
influence
were
compiled.
Understanding
methanogenesis
methanotrophy
holds
significant
importance
development
innovative
agricultural
practices
industrial
procedures
contribute
more
favourable
equilibrium
greenhouse
gases.
integration
advanced
genetic
analyses
can
enable
holistic
approaches
unravelling
potential
biological
systems
mitigation.
This
study
pioneers
biopotential
offering
unprecedented
avenues
biotechnological
applications.
Environmental Research Letters,
Journal Year:
2024,
Volume and Issue:
19(5), P. 054020 - 054020
Published: March 27, 2024
Abstract
Methane,
a
potent
greenhouse
gas,
is
significant
contributor
to
global
warming,
with
future
increases
in
its
abundance
potentially
leading
an
increase
of
more
than
1
∘
C
by
2050
beyond
other
gases
if
left
unaddressed.
To
remain
within
the
crucial
target
limiting
warming
1.5
C,
it
imperative
evaluate
potential
methane
removal
techniques.
This
study
presents
scoping
analysis
different
catalytic
technologies
(thermal,
photochemical
and
electrochemical)
materials
limitations
energy
requirements.
An
mass
transport
reaction
rates
conducted
for
atmospheric
conversion
system
configurations.
For
vast
majority
technologies,
limit
which
motivates
efforts
catalyst
development.
requirements
shows
minimum
configurations
various
classic
tube
or
parallel
plate
architectures
that
have
analogs
ventilation
industrial
fins.
Methane
concentrations
ranging
from
2
ppm
(ambient)
1000
(sources,
such
as
wetlands,
fossil-fuel
extraction
sites,
landfills
etc)
are
examined.
The
finds
electrocatalysis
offers
most
efficient
approach
(∼0.2
GJ
tonne
−1
CO
e)
new
installations
turbulent
ducts,
total
intensity
<
e.
Photocatalytic
catalysts
moderately
intensive
(∼2
e),
but
could
derive
much
their
input
‘free’
solar
sources.
Thermal
systems
shown
be
excessively
(
$\gt$?>
>
100
),
while
combining
photovoltaics
electrochemical
(∼1
comparable
photocatalytic
catalysts.
Environmental Advances,
Journal Year:
2024,
Volume and Issue:
15, P. 100504 - 100504
Published: March 1, 2024
There
is
scarcity
of
data
on
methane
(CH4)
concentration
levels
and
other
gas
compositions
around
animals
in
commercial
cattle
barns,
especially
for
developing
technology
gaseous
CH4
treatment.
Consequently,
use
biofiltration
catalytic
combustion
strategies
as
alternative
enteric
mitigation
techniques
remain
concepts
yet
to
be
validated
real
barns.
One
the
major
barriers
implementing
these
that
they
require
close
buildings,
which
not
case
most
Open
barns
are
frequently
associated
with
excessive
ventilation,
resulting
low
concentrations,
can
reduce
cost
effectiveness
treatment
techniques.
With
development
low-cost,
low-CH4-concentration
enrichment
technologies
still
their
infancy,
local
ventilation
systems
at
animal
level
capable
collecting
breath
from
cows
prior
air
mixing
could
an
option.
Therefore,
effect
a
cubicle
hood
system
(CHS)
different
extraction
increasing
concentrations
lying
area
were
evaluated
natural
mechanically
ventilated
dairy
buildings
during
winter
Norway.
In
both
CHS
increased
under
by
14-25
%
compared
without
CHS.
The
results
obtained
depended
height
floor
outdoor
temperature
exchange
rate
naturally
barn,
hourly
mean
ranged
14-225
ppm,
31-322
ppm
building.
Biosensors,
Journal Year:
2024,
Volume and Issue:
14(7), P. 325 - 325
Published: June 30, 2024
Microbial
alkane
degradation
pathways
provide
biological
routes
for
converting
these
hydrocarbons
into
higher-value
products.
We
recently
reported
the
functional
expression
of
a
methyl-alkylsuccinate
synthase
(Mas)
system
in
Escherichia
coli,
allowing
heterologous
anaerobic
activation
short-chain
alkanes.
However,
enzymatic
methane
via
natural
or
engineered
alkylsuccinate
synthases
has
yet
to
be
reported.
To
address
this,
we
employed
high-throughput
screening
engineer
itaconate
(IA)-responsive
regulatory
protein
ItcR
(WT-ItcR)
from
Yersinia
pseudotuberculosis
instead
respond
methylsuccinate
(MS,
product
addition
fumarate),
resulting
genetically
encoded
biosensors
MS.
Here,
describe
variants
that,
when
regulating
fluorescent
E.
show
increased
sensitivity,
improved
overall
response,
and
enhanced
specificity
toward
exogenously
added
MS
relative
wild-type
repressor.
Structural
modeling
analysis
ligand
binding
pocket
insights
altered
molecular
recognition.
In
serving
as
capable
activation,
MS-responsive
also
establish
framework
directed
evolution
other
reporters,
targeting
longer-chain
products
succinate
derivatives.
