Fermentation,
Год журнала:
2024,
Номер
10(6), С. 274 - 274
Опубликована: Май 23, 2024
Hydrogen
is
ideal
for
replacing
fossil
fuels
because
upon
combustion
it
generates
only
water.
Dark
fermentation
(DF)
from
lignocellulose
might
be
a
competitive
process
hydrogen
production
at
the
industrial
scale.
However,
must
pretreated
to
obtain
fermentable
sugars,
which
costly
and
creates
pollution.
Microorganisms
bovine
rumen
efficiently
degrade
lignocellulose.
Unfortunately,
they
have
scarcely
been
explored
of
hydrogen.
Therefore,
deeper
studies
on
culture
conditions
undertaken
understand
behavior
microbial
consortia
bovines
(MCRB)
during
production.
In
this
work,
we
evaluated
by
DF
with
MCRB
varying
incubation
time,
two
media
(MB
Rhodospirillaceae),
headspace
(40
80
mL),
thermal
treatment.
It
was
found
that
maximum
16
h
in
MB.
An
amount
mL
resulted
threefold
as
compared
40
mL;
without
heat
treatment
had
higher
H2
yield.
The
32
highly
variable,
ranging
between
21
696
mL.
Our
findings
show
different
perspective
give
insights
impact
increasing
Environments,
Год журнала:
2024,
Номер
11(6), С. 108 - 108
Опубликована: Май 24, 2024
In
light
of
growing
concerns
regarding
greenhouse
gas
emissions
and
the
increasingly
severe
impacts
climate
change,
global
situation
demands
immediate
action
to
transition
towards
sustainable
energy
solutions.
this
sense,
hydrogen
could
play
a
fundamental
role
in
transition,
offering
potential
clean
versatile
carrier.
This
paper
reviews
recent
results
Life
Cycle
Assessment
studies
different
production
pathways,
which
are
trying
define
routes
that
can
guarantee
least
environmental
burdens.
Steam
methane
reforming
was
considered
as
benchmark
for
Global
Warming
Potential,
with
an
average
emission
11
kgCO2eq/kgH2.
Hydrogen
produced
from
water
electrolysis
powered
by
renewable
(green
H2)
or
nuclear
(pink
showed
lowest
impacts,
mean
values
2.02
kgCO2eq/kgH2
0.41
kgCO2eq/kgH2,
respectively.
The
use
grid
electricity
power
electrolyzer
(yellow
raised
carbon
footprint
up
17.2
peak
41.4
case
countries
low
production.
Waste
pyrolysis
and/or
gasification
presented
three
times
higher
than
steam
reforming,
while
recourse
residual
biomass
biowaste
significantly
lowered
emissions.
acidification
presents
comparable
all
technologies
studied,
except
more
scattered
values.
Regarding
abiotic
depletion
(mineral),
main
issue
is
lack
established
recycling
strategy,
especially
hamper
inclusion
End
stage
LCA
computation.
Whenever
data
were
available,
hotspots
each
process
identified.
Processes,
Год журнала:
2025,
Номер
13(2), С. 294 - 294
Опубликована: Янв. 21, 2025
Anaerobic
digestion
(AD)
is
a
biotechnological
process
in
which
the
microorganisms
degrade
complex
organic
matter
to
simpler
components
under
anaerobic
conditions
produce
biogas
and
fertilizer.
This
has
many
environmental
benefits,
such
as
green
energy
production,
waste
treatment,
protection,
greenhouse
gas
emissions
reduction.
It
long
been
known
that
two
main
species
(acidogenic
bacteria
methanogenic
archaea)
community
of
AD
differ
aspects,
optimal
for
their
growth
development
are
different.
Therefore,
if
performed
single
bioreactor
(single-phase
process),
selected
taking
into
account
slow-growing
methanogens
at
expense
fast-growing
acidogens,
affecting
efficiency
whole
process.
led
two-stage
(TSAD)
recent
years,
where
processes
divided
cascade
separate
bioreactors
(BRs).
division
consecutive
BRs
leads
significantly
higher
yields
two-phase
system
(H2
+
CH4)
compared
traditional
single-stage
CH4
production
review
presents
state
art,
advantages
disadvantages,
some
perspectives
(based
on
more
than
210
references
from
2002
2024
our
own
studies),
including
all
aspects
TSAD—different
parameters’
influences,
types
bioreactors,
microbiology,
mathematical
modeling,
automatic
control,
energetical
considerations
TSAD
processes.
Biofuels Bioproducts and Biorefining,
Год журнала:
2024,
Номер
18(6), С. 2196 - 2210
Опубликована: Окт. 9, 2024
Abstract
Recurring
environmental
challenges
and
the
global
energy
crisis
have
led
to
intensified
research
on
alternative
sources.
Hydrogen
has
emerged
as
a
promising
solution,
produced
through
electrochemical,
thermochemical,
biological
methods.
This
study
presents
advantages
disadvantages
of
these
technologies.
It
also
provides
pertinent
data
hydrogen
production,
identifying
world‐leading
countries
in
such
USA,
Japan,
China,
government
policies
that
they
adopted.
reports
market
trends
synthesis
by
water
electrolysis,
high
cost
electrolyzers
used,
incentives
for
carbon
become
competitive
with
other
highlights
startups
from
around
world
are
developing
innovative
methodologies
producing
hydrogen.
The
concludes
integrating
production
concepts
social,
environmental,
industry
interests
is
essential.
Engenharia Sanitaria e Ambiental,
Год журнала:
2025,
Номер
30
Опубликована: Янв. 1, 2025
ABSTRACT
Condensed
water
(CW)
is
a
sugar-rich,
high-temperature
(40-55°C)
waste
product
from
the
sugar
and
ethanol
industry
whose
quality
disposal
volume
vary
significantly.
Anaerobic
digestion
can
combine
degradation
with
energy
production,
adding
value.
This
research
evaluated
hydrogen
production
in
thermophilic
acidogenic
reactor
(55°C)
using
CW,
aiming
at
recovery
this
by-product.
The
variation
of
applied
volumetric
organic
loading
rate
(OLRa—6–72
kg-COD.m–3.d–1),
through
progressive
increase
influent
COD
varying
500
to
6,000
mg.L–1,
simulating
characteristics
wastewater
during
season
(5.5
months),
effect
metal
supplementation
were
assessed,
as
was
microbial
community
involved
process,
an
ascending-flow
fixed-bed
filled
support
medium
low-density
polyethylene
granules
(PBD).
contained
carbohydrates
(from
120
±
15
1,900
100
mg.L–1)
acids
250
25
2,230
210
mg.L–1).
Low
carbohydrate
conversions
observed
phases
lower
than
4,207
284
mg.L–1
without
solution,
which
resulted
minimum
molar
flow
H2
yield
values.
highest
1.43
0.65
mmol-H2.g–1-CODr
OLRa
72.9
2.8
kg-COD.m–3.d–1
(COD
6,077
232
mg.L–1),
obtained
addition
metals
solution.
Pyrosequencing-454
analysis
showed
that
operational
conditions
benefited
selection
microorganisms
associated
Clostridia
class
(abundance
57.1%)
prevalence
genus
Coprothermobacter
(40.3%),
belonging
order
Thermoanaerobacter.
Pharmaceutics,
Год журнала:
2025,
Номер
17(3), С. 279 - 279
Опубликована: Фев. 20, 2025
Background:
Wound
healing
is
a
complex
and
intricate
biological
process
that
involves
multiple
systems
within
the
body
initiates
series
of
highly
coordinated
responses
to
repair
damage
restore
integrity
functionality.
We
previously
identified
breathing
hydrogen
can
significantly
inhibit
early
inflammation,
activate
autologous
stem
cells,
promote
accumulation
extracellular
matrix
(ECM).
However,
broader
functions
downstream
targets
hydrogen-induced
ECM
tissue
remodeling
are
unknown
in
wound-healing
process.
Methods:
Consequently,
this
thesis
developed
sustained-release
dressing
based
on
micro
storage
material
reveals
mechanism
treating
wound
healing.
Upon
encapsulating
materials,
magnesium
(Mg),
ammonia
borane
(AB),
we
found
SiO2@Mg
exhibits
superior
performance,
while
SiO2@AB
demonstrates
higher
capacity.
used
C57/BL6
mouse
full-thickness
skin
defect
model
analyze
compare
different
dressings.
Results:
It
was
dressings
improve
rate
wounds
by
promoting
epithelialization,
angiogenesis,
collagen
tissue,
effect
slow-release
better
than
non-slow-release
also
transcriptome-level
expression
related
cell
proliferation
differentiation
accumulation,
mainly
through
Wnt1/β-catenin
pathway
TGF-β1/Smad2
pathway.
Conclusions:
Overall,
these
results
provide
novel
insight
into
field
treatment
