Bioresource Technology,
Год журнала:
2024,
Номер
408, С. 131144 - 131144
Опубликована: Июль 21, 2024
Conductive
materials
(CM)
enhance
methanogenesis,
but
there
is
no
clear
correlation
between
conductivity
and
faster
methane
production
(MP)
rates.
We
investigated
if
MP
by
pure
cultures
of
methanogens
(Methanobacterium
formicicum,
Methanospirillum
hungatei,
Methanothrix
harundinacea
Methanosarcina
barkeri)
affected
CM
(activated
carbon
(AC),
magnetite),
other
sustainable
alternatives
(sand
glass
beads,
without
conductivity,
zeolites
(Zeo)).
The
significant
impact
the
was
on
M.
formicicum
as
significantly
accelerated
non-CM
(e.g.,
sand
reduced
lag
phase
(LP)
duration
48
%),
Zeo
AC
(LP
reduction
in
71%
75
%,
respectively).
Conductivity
not
correlated
with
LP
reduction.
Instead,
silicon
content
inversely
time
required
for
complete
MP,
per
se
stimulated
formicicum's
activity.
These
findings
highlight
potential
using
silicon-containing
anaerobic
digesters
to
accelerate
methanogenesis.
ACS ES&T Engineering,
Год журнала:
2024,
Номер
4(10), С. 2506 - 2519
Опубликована: Авг. 13, 2024
Enhancing
the
anaerobic
digestion
(AD)
of
organic
wastes
has
been
a
widely
discussed
topic.
This
study
aims
to
enhance
AD
performance
by
combining
microaeration
with
conductive
or
nonconductive
carriers,
using
food
waste
as
substrate.
The
use
carriers
alone
enhanced
methane
production,
and
further
improved
performance.
carrier
showed
significant
enhancement
microaeration,
achieving
daily
yield
478
±
11.3
mL
CH4/g
VS,
which
was
1.1
1.3
times
higher
than
that
control
digester,
respectively.
Furthermore,
explored
various
aspects,
including
oxidative
stress,
antioxidant
capacity,
microbial
community
structure
during
digestion.
results
demonstrated
hydrolytic-acidification
efficiency
promoted
direct
interspecies
electron
transfer
among
syntrophic
microorganisms.
Methanogenic
archaea
aggregated
on
surface
formed
consortia
facultative
anaerobes,
thereby
mitigating
stress
effects
cells
enhancing
total
production.
Moreover,
metabolomics
analysis
ATP
transport
across
bacterial
membrane,
accelerated
nutrient
conversion,
caused
changes
in
metabolites
intermediates
related
glycerophospholipids,
amino
acids,
signal
transduction
pathways.
