Foods,
Journal Year:
2024,
Volume and Issue:
13(21), P. 3371 - 3371
Published: Oct. 23, 2024
This
study
aimed
to
develop
an
active
biodegradable
bio-based
(polylactic
acid/PLA)
equilibrium
modified
atmosphere
packaging
(EMAP)
containing
a
carvacrol-emitting
sachet
(created
by
poly-hydroxybutyrate)
(PLA-PHB-CARV)
extend
the
shelf-life
of
cherry
tomatoes
at
15
°C
and
25
°C.
Cherry
in
macro-perforated
polypropylene
(PP)
films
(mimicking
commercial
packaging)
or
PLA-based
micro-perforated
film
without
carvacrol
(PLA)
were
also
tested.
Weight
loss,
decay,
headspace
gases,
pH,
titratable
acidity
(TA),
total
suspended
solids
(TSS),
ripening
index,
color,
texture,
viable
counts
(TVC),
sensory
analysis
performed.
Decay
was
40%
PLA-PHB-CARV,
97%
PP
after
20
days
PLA-PHB-CARV
showed
lower
weight
loss
(
Current Opinion in Biotechnology,
Journal Year:
2023,
Volume and Issue:
85, P. 103024 - 103024
Published: Dec. 5, 2023
Biopolymers
produced
as
microbial
carbon
storage
systems,
such
polyhydroxyalkanoates
(PHAs),
offer
potential
to
be
used
in
place
of
petrochemically
derived
plastics.
Low-value
organic
feedstocks,
food
waste,
have
been
explored
a
substrate
for
the
production
PHAs.
In
this
review,
we
discuss
biosynthesis,
composition
and
producers
PHAs,
with
particular
focus
on
genetic
process
engineering
efforts
utilise
non-native
substrates,
from
waste
across
entire
supply
chain,
growth
PHA
production.
We
highlight
series
studies
that
achieved
impressive
advances
challenges
producing
PHAs
consistent
properties
mixed
variable
by-products.
Polymers,
Journal Year:
2025,
Volume and Issue:
17(6), P. 735 - 735
Published: March 11, 2025
The
environmental
concerns
associated
with
synthetic
polymers
have
intensified
the
search
for
sustainable
and
biodegradable
alternatives,
particularly
food
packaging
applications.
Natural
biopolymers
offer
promising
solutions
due
to
their
biodegradability,
reduced
impact,
reliance
on
renewable
resources.
Among
these,
agri-food
waste
by-products
gained
significant
attention
as
valuable
feedstocks
polymer
production,
supporting
a
circular
economy
approach.
This
review
critically
examines
current
status
of
derived
from
plant,
animal,
microbial
sources,
focusing
physical
chemical
properties
application
in
packaging.
findings
underscore
that
plant-
animal-based
are
heavily
influenced
by
source
material
extraction
techniques,
successful
examples
films,
coatings,
composite
materials.
However,
critical
gap
remains
characterization
biopolymers,
research
this
area
predominantly
focuses
optimizing
production
processes
rather
than
evaluating
properties.
Despite
limitation,
demonstrated
considerable
potential
films
fillers.
By
addressing
these
gaps
key
factors
influence
success
biopolymer-based
packaging,
we
contribute
ongoing
efforts
develop
reduce
impact
plastic
waste.
Biochemical Engineering Journal,
Journal Year:
2024,
Volume and Issue:
204, P. 109239 - 109239
Published: Jan. 29, 2024
Gas-transfer
membranes
have
been
successfully
deployed
as
efficient
aeration
devices
in
wastewater
treatment.
There
is
an
increasing
interest
using
such
membrane
technology
industrial
biotechnology.
This
study
proposes
bioreactors
a
novel
bioreactor
setup
for
polyhydroxybutyrate
(PHB)
production
Cupriavidus
necator,
whereby
gas-transfer
are
used
aeration.
A
proof-of-concept
was
built
by
combining
50
ml
centrifuge
tube
with
hollow
fiber
bundles.
Different
numbers
and
length
of
polydimethylsiloxane
(PDMS)
were
to
create
bundles
varying
specific
surface
areas
oxygen
transfer.
In
batch
mode,
maximum
biomass
concentration
10.3
g/L,
which
corresponds
yield
0.67
g
biomass/g
substrate,
achieved
250
m2/m3
the
area
40
rpm
liquid
recirculation
rate.
Two
different
fed-batch
modes
investigated
induce
PHB
applying
nitrogen
source
limitation
via
fill-and-draw
two-step
feeding
strategies.
level
22%
obtained
supplying
0.25
g/L
NH4Cl
after
initial
cultivation.
Results
indicate
that
promising
C.
necator
cultivation,
but
further
research
needed
enhance
productivity.
