Molecules,
Год журнала:
2023,
Номер
28(9), С. 3883 - 3883
Опубликована: Май 4, 2023
Anaerobic
digestion
(AD)
is
a
triple-benefit
biotechnology
for
organic
waste
treatment,
renewable
production,
and
carbon
emission
reduction.
In
the
process
of
anaerobic
digestion,
pH,
temperature,
load,
ammonia
nitrogen,
VFAs,
other
factors
affect
fermentation
efficiency
stability.
The
balance
between
generation
consumption
volatile
fatty
acids
(VFAs)
in
key
to
stable
AD
operation.
However,
accumulation
VFAs
frequently
occurs,
especially
propionate,
because
its
oxidation
has
highest
Gibbs
free
energy
when
compared
VFAs.
order
solve
this
problem,
some
strategies,
including
buffering
addition,
suspension
feeding,
decreased
loading
rate,
so
on,
have
been
proposed.
Emerging
methods,
such
as
bioaugmentation,
supplementary
trace
elements,
addition
electronic
receptors,
conductive
materials,
degasification
dissolved
hydrogen,
recently
researched,
presenting
promising
results.
But
efficacy
these
methods
still
requires
further
studies
tests
regarding
full-scale
application.
main
objective
paper
provide
comprehensive
review
mechanisms
propionate
generation,
metabolic
pathways
influencing
during
process,
recent
literature
experimental
research
related
various
strategies
enhancing
biodegradation.
issues
that
must
be
addressed
future
focus
are
identified,
potential
directions
development
predicted.
International Journal of Molecular Sciences,
Год журнала:
2023,
Номер
24(5), С. 4753 - 4753
Опубликована: Март 1, 2023
The
interspecies
electron
transfer
(IET)
between
microbes
and
archaea
is
the
key
to
how
anaerobic
digestion
process
performs.
However,
renewable
energy
technology
that
utilizes
application
of
a
bioelectrochemical
system
together
with
additives
such
as
magnetite-nanoparticles
can
promote
both
direct
(DIET)
well
indirect
(IIET).
This
has
several
advantages,
including
higher
removal
toxic
pollutants
present
in
municipal
wastewater,
biomass
conversion,
greater
electrochemical
efficiencies.
review
explores
synergistic
influence
systems
on
complex
substrates
sewage
sludge.
discussions
mechanisms
limitations
conventional
process.
In
addition,
applicability
syntrophic,
metabolic,
catalytic,
enzymatic,
cation
exchange
activities
are
highlighted.
effect
bio-additives
operational
factors
explored.
It
elucidated
coupled
nanomaterial
increase
biogas–methane
potential
compared
digestion.
Therefore,
prospects
for
wastewater
require
research
attention.
BIO Web of Conferences,
Год журнала:
2025,
Номер
156, С. 02014 - 02014
Опубликована: Янв. 1, 2025
This
systematic
review
examines
recent
advancements
in
carbon-based
adsorbent
materials
for
ammonium
removal
from
water,
a
critical
issue
due
to
contamination
agricultural,
domestic,
and
industrial
sources.
Elevated
levels
disrupt
aquatic
ecosystems
compromise
water
quality.
Among
various
technologies,
ion
exchange
adsorption
using
such
as
activated
carbon
(AC)
biochar
are
highlighted
their
efficiency,
cost-effectiveness,
environmental
benefits.
Modified
adsorbents,
like
manganese
oxide-loaded
AC,
significantly
enhance
performance.
Biochars,
particularly
those
modified
with
NaOH
Mg2+,
show
improved
capacities,
especially
when
combined
heterotrophic
nitrifying
bacteria
(HNB).
Carbon
nanotubes
(CNTs),
multi-walled
CNTs,
demonstrate
superior
capabilities.
Direct
contact
membrane
distillation
(DCMD)
CNT-
immobilized
membranes
also
shows
promise.
Lignite,
low-rank
coal,
proves
be
an
economical
natural
enhanced
performance
through
aerobic
dewatering
oxidation.
Future
research
should
optimize
these
real-world
applications,
pilot-scale
studies,
complex
wastewater
matrices.
Environmental Technology,
Год журнала:
2025,
Номер
unknown, С. 1 - 10
Опубликована: Фев. 6, 2025
Urban
solid
waste
(USW)
contains
a
significant
proportion
of
organic
matter,
represented
by
the
Organic
Fraction
Municipal
Solid
Waste
(OFMSW),
quantified
as
Volatile
Solids/Total
Solids
(VS/TS).
This
fraction
can
be
leveraged
for
energy
production.
study
proposes
an
innovative
approach
to
controlling
FOS/TAC
ratio
(FOS:
Acids
(VOAs,
C2-C6);
TAC:
Total
Alkaline
Carbonate)
in
anaerobic
digestion
using
Continuously
Stirred
Tank
Reactor
(CSTR).
Instead
adding
external
alkalizing
agents,
method
relies
on
feed
interruptions
promote
self-recovery
buffering
compounds.
The
process
was
analyzed
correlating
ratio,
volatile
acids
(VOA)
levels,
and
biogas
methane
Experiments
utilized
loading
rates
(OLR)
0.5,
1.0,
1.5
g
VS
L-1
d-1,
with
latter
yielding
removal
efficiency
68-91%,
content
50-75%,
acid
accumulation.
ranged
from
0.5
2.0,
acetic
propionic
concentrations
reaching
7,422
mg
4,596
L-1,
respectively.
halted
when
production
stabilized
at
0.06
L
reactor
50%.
results
demonstrate
that
OFMSW
is
viable
treatment
strategy
OLRs
up
achieving
efficient
without
need
chemical
additives.
