Microbial Biotechnology,
Journal Year:
2022,
Volume and Issue:
16(3), P. 494 - 506
Published: Dec. 4, 2022
Abstract
The
junction
of
bioelectrochemical
systems
and
synthetic
biology
opens
the
door
to
many
potentially
groundbreaking
technologies.
When
developing
these
possibilities,
choosing
correct
chassis
organism
can
save
a
great
deal
engineering
effort
and,
indeed,
mean
difference
between
success
failure.
Choosing
for
specific
application
requires
knowledge
metabolic
potential
candidate
organisms,
as
well
clear
delineation
traits,
required
in
application.
In
this
review,
we
will
explore
electrochemical
single
genus,
Marinobacter.
We
cover
its
strengths,
(salt
tolerance,
biofilm
formation
potential)
weaknesses
(insufficient
characterization
strains
less
developed
toolbox
genetic
manipulation)
electromicrobiology
applications.
doing
so,
provide
roadmap
systems.
Molecules,
Journal Year:
2024,
Volume and Issue:
29(4), P. 834 - 834
Published: Feb. 13, 2024
The
energy
crisis
and
climate
change
are
two
of
the
most
concerning
issues
for
human
beings
nowadays.
For
that
reason,
scientific
community
is
focused
on
search
alternative
biofuels
to
conventional
fossil
fuels
as
well
development
sustainable
processes
develop
a
circular
economy.
Bioelectrochemical
have
been
demonstrated
be
useful
producing
bioenergy
value-added
products
from
several
types
waste.
Electro-fermentation
has
gained
great
attention
in
last
few
years
due
its
potential
contribution
biofuel
biochemical
production,
e.g.,
hydrogen,
methane,
biopolymers,
etc.
Conventional
fermentation
pose
limitations
terms
their
practical
economic
feasibility.
introduction
electrodes
bioreactor
allows
regulation
redox
instabilities
occur
fermentation,
boosting
overall
process
towards
high
biomass
yield
enhanced
product
formation.
In
this
regard,
key
parameters
such
type
culture,
nature
operating
conditions
crucial
order
maximize
production
biochemicals
via
electro-fermentation
technology.
This
article
comprises
critical
overview
benefits
emerging
bio-electrochemical
technology
Bioelectrochemistry,
Journal Year:
2023,
Volume and Issue:
152, P. 108414 - 108414
Published: March 15, 2023
This
manuscript
describes
the
effect
of
altering
extracellular
redox
potential
during
production
acetone,
butanol,
and
ethanol
on
a
dual
chamber
H-type
microbial
fuel
cell
by
fermenting
glucose
with
Clostridium
saccharoperbutylacetonicum
N1-4.
Extracellular
modification
was
achieved
either
supplementing
broth
agent
NADH
or
poising
cathode
at
-600
mV
vs.
Ag/AgCl.
The
addition
found
to
foment
acetone
via
fermentation
glucose.
200
mM
catholyte
rendered
highest
(2.4
g
L-1),
thus
outperforming
conventional
means
(control
treatment)
factor
2.2.
experimental
evidence
gathered
here,
indicates
that
cathodic
electro-fermentation
favors
butanol.
When
vs
Ag/AgCl
(electro-fermentation),
largest
butanol
(5.8
control
treatment
1.5.
ABE
solvents
electrochemical
measurements
demonstrate
electroactive
properties
C.
N1-4
illustrates
usefulness
bio-electrochemical
systems
improve
fermentative
processes.
Environmental Science and Ecotechnology,
Journal Year:
2023,
Volume and Issue:
16, P. 100261 - 100261
Published: March 21, 2023
The
industrial
adoption
of
microbial
electrosynthesis
(MES)
is
hindered
by
high
overpotentials
deriving
from
low
electrolyte
conductivity
and
inefficient
cell
designs.
In
this
study,
a
mixed
consortium
originating
an
anaerobic
digester
operated
under
saline
conditions
(∼13
g
L-1
NaCl)
was
adapted
for
acetate
production
bicarbonate
in
galvanostatic
(0.25
mA
cm-2)
H-type
cells
at
5,
10,
15,
or
20
NaCl
concentration.
acetogenic
communities
were
successfully
enriched
only
5
10
NaCl,
revealing
inhibitory
threshold
about
6
Na+.
planktonic
then
used
as
inoculum
3D
printed,
three-chamber
equipped
with
gas
diffusion
biocathode.
fed
CO2
galvanostatically
1.00
cm-2).
highest
rate
55.4
m-2
d-1
(0.89
d-1),
82.4%
Coulombic
efficiency,
obtained
concentration
1
cm-2
applied
current,
achieving
average
44.7
kg
MWh-1.
Scanning
electron
microscopy
16S
rRNA
sequencing
analysis
confirmed
the
formation
cathodic
biofilm
dominated
Acetobacterium
sp.
Finally,
three
printed
hydraulically
connected
series
to
simulate
MES
stack,
three-fold
rates
than
single
0.25
cm-2.
This
confirms
that
are
efficient
scalable
technology
bio-electro
recycling
moderate
(5
can
help
reduce
their
power
demand
while
preserving
activity
acetogens.
Xylose
fermentation
often
faced
limitations
coupled
with
unbalanced
microbial
intracellular
metabolic
states.
Recent
development
in
cathodic
electro-fermentation
technologies
addresses
this
issue
by
balancing
states
and
influencing
the
intercellular
electron
load
of
various
microorganisms
a
cathode
electrode.
This
research
studied
feeding
strategies
mixed
culture
systems
aiming
at
long-term
enhancement
production
rates
or
yields
carboxylic
acids
e.g.,
propionate
butyrate,
using
xylose
as
raw
material.
The
results
compared
fed-batch
continuous
(poised
potential
-0.4
V
vs.
standard
hydrogen
electrode)
their
community
compositions.
highlighted
prompt
uninterrupted
cathode-assisted
metabolism
towards
butyrate
than
systems,
enhanced
product
yield
coefficients
(propionate
1.57-fold,
1.64-fold)
reactors
poised
to
open-circuit
controls.
16S
rRNA
gene
characterisation
revealed
different
operation
modes
that
influence
presence
bacterial
genera,
including
Clostridium
biofilm
planktonic
cells,
which
notably
played
crucial
role
processes.
