Journal of Cleaner Production,
Journal Year:
2023,
Volume and Issue:
389, P. 136079 - 136079
Published: Jan. 17, 2023
Excessive
acidification
and
low
methane
(CH4)
percentage
are
technical
challenges
restricting
anaerobic
digestion
(AD)
of
kitchen
waste,
especially
under
high
organic
loading
rate
(OLR)
conditions.
Although
the
contribution
Fe0
powder
to
excessive
elimination
CH4
yield
improvement
in
mesophilic
AD
(MAD)
has
been
extensively
reported,
its
impact
on
thermophilic
(TAD)
process
with
more
frequent
problem
is
rarely
studied.
Moreover,
difference
microbial
interactions
metabolic
pathways
between
MAD
TAD
reactors
regulation
was
still
unclear.
In
this
study,
we
compared
performance
dosing
biogas
upgrading
quality
both
at
different
OLRs.
The
results
showed
that
or
(less
than
70%)
control
without
addition,
addition
OLR
35
gVS/L
were
470.88
mLCH4/gVS
270.40
mLCH4/gVS,
higher
composition
81.32%–82.23%
83.68%–88.48%
respectively.
Microbial
diversity
analysis
a
sharp
distinction
Fe0.
Analyses
co-occurrence
networks
pathway
presented
hydrogenotrophic
methanogenic
pathway,
acetoclastic
methanogenesis,
dominant
as
enhanced
interspecies
hydrogen
transfer
Methanoculleus
some
producers,
condition.
contrast,
syntrophilic
acetate
oxidization
-
which
dominated
by
Methanothermobacter
Alkaliphilus
Pelotomaculum,
sole
reactors.
will
shed
lights
mechanisms
waste
conditions,
offering
new
insight
into
development
efficient
energy
conversion
technologies.
Sustainability,
Journal Year:
2025,
Volume and Issue:
17(4), P. 1425 - 1425
Published: Feb. 9, 2025
Amid
the
pressing
challenge
of
global
climate
change,
biogas
(marsh
gas)
has
garnered
recognition
as
a
clean
and
renewable
energy
source
with
significant
potential
to
reduce
greenhouse
gas
emissions
support
sustainable
production.
Composed
primarily
methane
(CH4)
carbon
dioxide
(CO2),
enhancing
CH4
content
in
is
essential
for
improving
its
quality
expanding
high-value
applications.
This
review
examines
mechanisms
underlying
CO2
production
anaerobic
digestion
(AD)
processes;
investigates
effects
raw
material
types,
process
routes,
fermentation
conditions
on
content;
proposes
feasible
technical
pathways
producing
CH4-rich
biogas.
Research
indicates
that
can
be
produced
through
various
strategies.
Raw
pretreatment
technologies
co-digestion
strategies
enhance
substrate
performance,
stabilize
AD
process,
boost
Process
optimizations,
such
multiphase
co-production
techniques,
significantly
improve
utilization
efficiency.
Introducing
exogenous
reinforcement
materials,
including
biochar
zero-valent
iron
nanoparticles,
fosters
microbial
interactions
facilitates
direct
interspecies
electron
transfer
(DIET).
Furthermore,
regulation
genetic
engineering
community
design
presents
promising
prospects.
By
reviewing
production,
influencing
factors,
pathways,
this
work
aims
provide
valuable
insights
research
produce
