Acta Technologica Agriculturae,
Год журнала:
2024,
Номер
27(2), С. 61 - 68
Опубликована: Июнь 1, 2024
Abstract
This
study
evaluates
anaerobic
bioconversion
using
landfill-derived
microbes
to
produce
volatile
fatty
acids
(VFAs)
as
bioproducts.
The
research
was
conducted
different
substrates,
including
elephant
grass,
starch
waste,
and
fruit
waste.
Landfill-derived
collected
from
the
landfill
site
were
used
inoculum.
results
show
that
carbohydrate
composition
in
substrate
affects
VFA
production.
Simpler
such
waste
produced
more
VFAs
(approximately
50
mmol
·
L
–1
)
than
of
complex
grass
25
).
showed
simpler
substrates
(i.e.
waste)
two
times
higher
or
lignocellulosic
biomass-based
feedstock
grass).
These
findings
provide
valuable
insights
into
potential
use
process
VFAs.
By
understanding
influence
composition,
we
can
enhance
efficiency
production
organic
which
be
various
industrial
applications.
is
a
crucial
step
towards
sustainable
management
efficient
resource
utilisation.
FEMS Microbiology Reviews,
Год журнала:
2023,
Номер
48(1)
Опубликована: Ноя. 20, 2023
Abstract
Awareness
is
growing
that
human
health
cannot
be
considered
in
isolation
but
inextricably
woven
with
the
of
environment
which
we
live.
It
is,
however,
under-recognized
sustainability
activities
strongly
relies
on
preserving
equilibrium
microbial
communities
living
in/on/around
us.
Microbial
metabolic
are
instrumental
for
production,
functionalization,
processing,
and
preservation
food.
For
circular
economy,
metabolism
would
exploited
to
produce
building
blocks
chemical
industry,
achieve
effective
crop
protection,
agri-food
waste
revalorization,
or
biofuel
as
well
bioremediation
bioaugmentation
contaminated
areas.
Low
pH
undoubtedly
a
key
physical–chemical
parameter
needs
exploiting
powerful
arsenal.
Deviation
from
optimal
conditions
has
profound
effects
shaping
responsible
carrying
out
essential
processes.
Furthermore,
novel
strategies
combat
contaminations
infections
by
pathogens
rely
microbial-derived
acidic
molecules
suppress/inhibit
their
growth.
Herein,
present
state-of-the-art
knowledge
impact
many
applied
areas
how
this
can
guide
us
use
immense
arsenal
more
impactful
exploitation
Planetary
Health
perspective.
Biotechnology Advances,
Год журнала:
2024,
Номер
73, С. 108363 - 108363
Опубликована: Апрель 22, 2024
In
recent
years,
there
has
been
growing
interest
in
harnessing
anaerobic
digestion
technology
for
resource
recovery
from
waste
streams.
This
approach
evolved
beyond
its
traditional
role
energy
generation
to
encompass
the
production
of
valuable
carboxylic
acids,
especially
volatile
fatty
acids
(VFAs)
like
acetic
acid,
propionic
and
butyric
acid.
VFAs
hold
great
potential
various
industries
biobased
applications
due
their
versatile
properties.
Despite
increasing
global
demand,
over
90%
are
currently
produced
synthetically
petrochemicals.
Realizing
large-scale
VFA
streams
offers
significant
eco-friendly
opportunities
but
comes
with
several
key
challenges.
These
include
low
yields,
unstable
acid
compositions,
complex
expensive
purification
methods,
post-processing
needs.
Among
these,
yield
composition
stand
out
as
most
critical
obstacles
impacting
economic
viability
competitiveness.
paper
seeks
offer
a
comprehensive
view
combining
complementary
modeling
approaches,
including
kinetic
microbial
modeling,
understand
workings
communities
metabolic
pathways
production,
enhance
efficiency,
regulate
profiles
through
integration
omics
bioreactor
data.
Water,
Год журнала:
2024,
Номер
16(11), С. 1514 - 1514
Опубликована: Май 25, 2024
Acidogenic
fermentation
is
a
technology
that
involves
halting
methanogenesis
in
the
conventional
anaerobic
digestion
process
to
produce
mainly
volatile
fatty
acids
(VFAs).
VFAs
serve
as
direct
precursors
energy-rich
or
higher
value-added
products
upon
undergoing
additional
processing.
In
this
study,
batch
reactors
were
utilized
assess
individual
and
interaction
effects
of
time
pH
variables
on
VFA
production
from
acidogenic
cassava
wastewater
through
establishment
completely
randomized
design
second-order
response
surface
(rotatable
central
composite
design),
respectively.
The
maximum
observed
was
3444.04
mg
acetic
acid
(HAc)/L
(0.58
gCODVFA/gCOD)
6
days,
with
(48.5%),
propionic
(28.3%),
butyric
(13.6%)
identified
main
metabolites.
Additionally,
assessment
effect
pH,
reached
2547.72
mgHAc/L
(0.34
at
5.9,
predominant
organic
acid.
Statistically,
individually
affect
wastewater;
however,
between
them
generated
non-significant
effect.
Sustainability,
Год журнала:
2023,
Номер
15(3), С. 2370 - 2370
Опубликована: Янв. 28, 2023
This
study
presents
a
bibliometric
analysis
of
the
scientific
literature
on
volatile
fatty
acids
(VFA)
production
from
wastewater
fermentation
published
1981
to
21
June
2021.
A
total
618
papers
obtained
Scopus
database
were
analyzed
using
VOSviewer
1.6.16
software.
According
results,
this
topic
has
been
capturing
attention
researchers
over
years,
but
with
different
research
approaches,
including
optimization
anaerobic
digestion
in
two-stage
reactors,
biological
removal
nutrients
wastewater,
energy
bioelectrochemical
systems,
and
recovery
VFA
as
value-added
intermediate
products
be
used
inputs
variety
industries.
In
addition,
networks
authors’
keyword
frequency
showed
that
treatment
by
obtain
by-product
is
an
emerging
undoubtedly
requires
further
collaboration
between
institutions.
regard,
types
have
substrate
for
acidogenic
fermentation;
however,
based
cassava
processing
seen
one
issues
field.
Finally,
evaluating
effect
operating
conditions
process,
such
pH,
hydraulic
retention
time,
organic
loading
rate,
temperature,
inoculum
concentration,
independent
final
application
produced,
relevant
aspect
bioprocess
implementation
large
scale.
Fermentation,
Год журнала:
2022,
Номер
9(1), С. 13 - 13
Опубликована: Дек. 23, 2022
Volatile
fatty
acids
(VFA)
are
intermediary
degradation
products
during
anaerobic
digestion
(AD)
that
subsequently
converted
to
methanogenic
substrates,
such
as
hydrogen
(H2),
carbon
dioxide
(CO2),
and
acetic
acid
(CH3COOH).
The
final
step
of
AD
is
the
conversion
these
substrates
into
biogas,
a
mixture
methane
(CH4)
CO2.
In
arrested
(AAD),
suppressed
inhibit
VFA
making
main
product
AAD,
with
CO2
H2.
recovered
from
AAD
fermentation
can
be
further
sustainable
biofuels
bioproducts.
Although
this
concept
known,
commercialization
has
been
hindered
by
low
titers
productivity
lack
cost-effective
separation
methods
for
recovering
VFA.
This
article
reviews
different
techniques
used
rewire
current
state
art
production
emphasizing
recent
developments
made
increasing
complex
organic
materials.
Finally,
paper
discusses
could
play
pivotal
role
in
producing
jet
fuels
agricultural
biomass
wet
waste
Molecules,
Год журнала:
2024,
Номер
29(11), С. 2477 - 2477
Опубликована: Май 24, 2024
This
review
addresses
the
critical
issue
of
a
rapidly
increasing
worldwide
waste
stream
and
need
for
sustainable
management.
The
paper
proposes
an
integrated
transformation
toward
next-generation
methanization
process,
which
leads
not
only
to
treating
but
also
converting
it
into
higher
value
compounds
greener
energy.
Although
current
commonly
used
anaerobic
digestion
process
is
useful
biogas
production,
presents
limitations
resource
exploitation
some
negative
environmental
impacts.
Focusing
on
acidogenic
stage
in
processing,
discusses
recent
strategies
enhance
recovery
volatile
fatty
acids
(VFAs).
These
serve
as
precursors
synthesizing
variety
biochemicals
biofuels,
offering
products
than
solely
energy
soil
fertilizers.
Additionally,
importance
recycling
fermentation
residues
back
biorefinery
highlighted.
generates
additional
VFAs
contributes
generating
clean
energy,
thereby
enhancing
overall
sustainability
efficiency
management
system.
Moreover,
necessity
integrate
life
cycle
assessment
(LCA)
techno-economic
analysis
(TEA)
evaluate
impacts,
sustainability,
processing
costs
proposed
biorefinery.
